Context Navigation

acspecific.m4@ 3162

Visit:

Last change on this file since 3162 was 3159, checked in by bird, 18 years ago
Applied OS/2 patches.
File size: 82.5 KB

Line
1	dnl Macros that test for specific features.
2	dnl This file is part of Autoconf.
3	dnl Copyright (C) 1992, 93, 94, 95, 96, 1998 Free Software Foundation, Inc.
4	dnl
5	dnl This program is free software; you can redistribute it and/or modify
6	dnl it under the terms of the GNU General Public License as published by
7	dnl the Free Software Foundation; either version 2, or (at your option)
8	dnl any later version.
9	dnl
10	dnl This program is distributed in the hope that it will be useful,
11	dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
12	dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	dnl GNU General Public License for more details.
14	dnl
15	dnl You should have received a copy of the GNU General Public License
16	dnl along with this program; if not, write to the Free Software
17	dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
18	dnl 02111-1307, USA.
19	dnl
20	dnl As a special exception, the Free Software Foundation gives unlimited
21	dnl permission to copy, distribute and modify the configure scripts that
22	dnl are the output of Autoconf. You need not follow the terms of the GNU
23	dnl General Public License when using or distributing such scripts, even
24	dnl though portions of the text of Autoconf appear in them. The GNU
25	dnl General Public License (GPL) does govern all other use of the material
26	dnl that constitutes the Autoconf program.
27	dnl
28	dnl Certain portions of the Autoconf source text are designed to be copied
29	dnl (in certain cases, depending on the input) into the output of
30	dnl Autoconf. We call these the "data" portions. The rest of the Autoconf
31	dnl source text consists of comments plus executable code that decides which
32	dnl of the data portions to output in any given case. We call these
33	dnl comments and executable code the "non-data" portions. Autoconf never
34	dnl copies any of the non-data portions into its output.
35	dnl
36	dnl This special exception to the GPL applies to versions of Autoconf
37	dnl released by the Free Software Foundation. When you make and
38	dnl distribute a modified version of Autoconf, you may extend this special
39	dnl exception to the GPL to apply to your modified version as well, unless
40	dnl your modified version has the potential to copy into its output some
41	dnl of the text that was the non-data portion of the version that you started
42	dnl with. (In other words, unless your change moves or copies text from
43	dnl the non-data portions to the data portions.) If your modification has
44	dnl such potential, you must delete any notice of this special exception
45	dnl to the GPL from your modified version.
46	dnl
47	dnl Written by David MacKenzie, with help from
48	dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
49	dnl Roland McGrath, Noah Friedman, david d zuhn, and many others.
50
51
52	dnl ### Checks for programs
53
54
55	dnl Check whether to use -n, \c, or newline-tab to separate
56	dnl checking messages from result messages.
57	dnl Idea borrowed from dist 3.0.
58	dnl Internal use only.
59	AC_DEFUN(AC_PROG_ECHO_N,
60	[if (echo "testing\c"; echo 1,2,3) \| grep c >/dev/null; then
61	# Stardent Vistra SVR4 grep lacks -e, says ghazi@caip.rutgers.edu.
62	if (echo -n testing; echo 1,2,3) \| sed s/-n/xn/ \| grep xn >/dev/null; then
63	ac_n= ac_c='
64	' ac_t=' '
65	else
66	ac_n=-n ac_c= ac_t=
67	fi
68	else
69	ac_n= ac_c='\c' ac_t=
70	fi
71	])
72
73	AC_DEFUN(AC_PROG_CC,
74	[AC_BEFORE([$0], [AC_PROG_CPP])dnl
75	AC_CHECK_PROG(CC, gcc, gcc)
76	if test -z "$CC"; then
77	AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
78	if test -z "$CC"; then
79	case "`uname -s`" in
80	win32 \| WIN32)
81	AC_CHECK_PROG(CC, cl, cl) ;;
82	esac
83	fi
84	test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
85	fi
86
87	AC_PROG_CC_WORKS
88	AC_PROG_CC_GNU
89
90	if test $ac_cv_prog_gcc = yes; then
91	GCC=yes
92	else
93	GCC=
94	fi
95
96	dnl Check whether -g works, even if CFLAGS is set, in case the package
97	dnl plays around with CFLAGS (such as to build both debugging and
98	dnl normal versions of a library), tasteless as that idea is.
99	ac_test_CFLAGS="${CFLAGS+set}"
100	ac_save_CFLAGS="$CFLAGS"
101	CFLAGS=
102	AC_PROG_CC_G
103	if test "$ac_test_CFLAGS" = set; then
104	CFLAGS="$ac_save_CFLAGS"
105	elif test $ac_cv_prog_cc_g = yes; then
106	if test "$GCC" = yes; then
107	CFLAGS="-g -O2"
108	else
109	CFLAGS="-g"
110	fi
111	else
112	if test "$GCC" = yes; then
113	CFLAGS="-O2"
114	else
115	CFLAGS=
116	fi
117	fi
118	])
119
120	AC_DEFUN(AC_PROG_CXX,
121	[AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
122	AC_CHECK_PROGS(CXX, $CCC c++ g++ gcc CC cxx cc++ cl, gcc)
123
124	AC_PROG_CXX_WORKS
125	AC_PROG_CXX_GNU
126
127	if test $ac_cv_prog_gxx = yes; then
128	GXX=yes
129	else
130	GXX=
131	fi
132
133	dnl Check whether -g works, even if CXXFLAGS is set, in case the package
134	dnl plays around with CXXFLAGS (such as to build both debugging and
135	dnl normal versions of a library), tasteless as that idea is.
136	ac_test_CXXFLAGS="${CXXFLAGS+set}"
137	ac_save_CXXFLAGS="$CXXFLAGS"
138	CXXFLAGS=
139	AC_PROG_CXX_G
140	if test "$ac_test_CXXFLAGS" = set; then
141	CXXFLAGS="$ac_save_CXXFLAGS"
142	elif test $ac_cv_prog_cxx_g = yes; then
143	if test "$GXX" = yes; then
144	CXXFLAGS="-g -O2"
145	else
146	CXXFLAGS="-g"
147	fi
148	else
149	if test "$GXX" = yes; then
150	CXXFLAGS="-O2"
151	else
152	CXXFLAGS=
153	fi
154	fi
155	])
156
157	dnl Determine a Fortran 77 compiler to use. If `F77' is not already set
158	dnl in the environment, check for `g77', `f77' and `f2c', in that order.
159	dnl Set the output variable `F77' to the name of the compiler found.
160	dnl
161	dnl If using `g77' (the GNU Fortran 77 compiler), then `AC_PROG_F77'
162	dnl will set the shell variable `G77' to `yes', and empty otherwise. If
163	dnl the output variable `FFLAGS' was not already set in the environment,
164	dnl then set it to `-g -02' for `g77' (or `-O2' where `g77' does not
165	dnl accept `-g'). Otherwise, set `FFLAGS' to `-g' for all other Fortran
166	dnl 77 compilers.
167	dnl
168	dnl AC_PROG_F77()
169	AC_DEFUN(AC_PROG_F77,
170	[AC_BEFORE([$0], [AC_PROG_CPP])dnl
171	if test -z "$F77"; then
172	AC_CHECK_PROGS(F77, g77 f77 f2c)
173	test -z "$F77" && AC_MSG_ERROR([no acceptable Fortran 77 compiler found in \$PATH])
174	fi
175
176	AC_PROG_F77_WORKS
177	AC_PROG_F77_GNU
178
179	if test $ac_cv_prog_g77 = yes; then
180	G77=yes
181	dnl Check whether -g works, even if FFLAGS is set, in case the package
182	dnl plays around with FFLAGS (such as to build both debugging and
183	dnl normal versions of a library), tasteless as that idea is.
184	ac_test_FFLAGS="${FFLAGS+set}"
185	ac_save_FFLAGS="$FFLAGS"
186	FFLAGS=
187	AC_PROG_F77_G
188	if test "$ac_test_FFLAGS" = set; then
189	FFLAGS="$ac_save_FFLAGS"
190	elif test $ac_cv_prog_f77_g = yes; then
191	FFLAGS="-g -O2"
192	else
193	FFLAGS="-O2"
194	fi
195	else
196	G77=
197	test "${FFLAGS+set}" = set \|\| FFLAGS="-g"
198	fi
199	])
200
201	AC_DEFUN(AC_PROG_CC_WORKS,
202	[AC_MSG_CHECKING([whether the C compiler ($CC $CFLAGS $LDFLAGS) works])
203	AC_LANG_SAVE
204	AC_LANG_C
205	AC_TRY_COMPILER([main(){return(0);}], ac_cv_prog_cc_works, ac_cv_prog_cc_cross)
206	AC_LANG_RESTORE
207	AC_MSG_RESULT($ac_cv_prog_cc_works)
208	if test $ac_cv_prog_cc_works = no; then
209	AC_MSG_ERROR([installation or configuration problem: C compiler cannot create executables.])
210	fi
211	AC_MSG_CHECKING([whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler])
212	AC_MSG_RESULT($ac_cv_prog_cc_cross)
213	cross_compiling=$ac_cv_prog_cc_cross
214	])
215
216	AC_DEFUN(AC_PROG_CXX_WORKS,
217	[AC_MSG_CHECKING([whether the C++ compiler ($CXX $CXXFLAGS $LDFLAGS) works])
218	AC_LANG_SAVE
219	AC_LANG_CPLUSPLUS
220	AC_TRY_COMPILER([int main(){return(0);}], ac_cv_prog_cxx_works, ac_cv_prog_cxx_cross)
221	AC_LANG_RESTORE
222	AC_MSG_RESULT($ac_cv_prog_cxx_works)
223	if test $ac_cv_prog_cxx_works = no; then
224	AC_MSG_ERROR([installation or configuration problem: C++ compiler cannot create executables.])
225	fi
226	AC_MSG_CHECKING([whether the C++ compiler ($CXX $CXXFLAGS $LDFLAGS) is a cross-compiler])
227	AC_MSG_RESULT($ac_cv_prog_cxx_cross)
228	cross_compiling=$ac_cv_prog_cxx_cross
229	])
230
231	dnl Test whether the Fortran 77 compiler can compile and link a trivial
232	dnl Fortran program. Also, test whether the Fortran 77 compiler is a
233	dnl cross-compiler (which may realistically be the case if the Fortran
234	dnl compiler is `g77').
235	dnl
236	dnl AC_PROG_F77_WORKS()
237	AC_DEFUN(AC_PROG_F77_WORKS,
238	[AC_MSG_CHECKING([whether the Fortran 77 compiler ($F77 $FFLAGS $LDFLAGS) works])
239	AC_LANG_SAVE
240	AC_LANG_FORTRAN77
241	AC_TRY_COMPILER(dnl
242	[ program conftest
243	end
244	], ac_cv_prog_f77_works, ac_cv_prog_f77_cross)
245	AC_LANG_RESTORE
246	AC_MSG_RESULT($ac_cv_prog_f77_works)
247	if test $ac_cv_prog_f77_works = no; then
248	AC_MSG_ERROR([installation or configuration problem: Fortran 77 compiler cannot create executables.])
249	fi
250	AC_MSG_CHECKING([whether the Fortran 77 compiler ($F77 $FFLAGS $LDFLAGS) is a cross-compiler])
251	AC_MSG_RESULT($ac_cv_prog_f77_cross)
252	cross_compiling=$ac_cv_prog_f77_cross
253	])
254
255	AC_DEFUN(AC_PROG_CC_GNU,
256	[AC_CACHE_CHECK(whether we are using GNU C, ac_cv_prog_gcc,
257	[dnl The semicolon is to pacify NeXT's syntax-checking cpp.
258	cat > conftest.c <<EOF
259	#ifdef __GNUC__
260	yes;
261	#endif
262	EOF
263	if AC_TRY_COMMAND(${CC-cc} -E conftest.c) \| egrep yes >/dev/null 2>&1; then
264	ac_cv_prog_gcc=yes
265	else
266	ac_cv_prog_gcc=no
267	fi])])
268
269	AC_DEFUN(AC_PROG_CXX_GNU,
270	[AC_CACHE_CHECK(whether we are using GNU C++, ac_cv_prog_gxx,
271	[dnl The semicolon is to pacify NeXT's syntax-checking cpp.
272	cat > conftest.C <<EOF
273	#ifdef __GNUC__
274	yes;
275	#endif
276	EOF
277	if AC_TRY_COMMAND(${CXX-g++} -E conftest.C) \| egrep yes >/dev/null 2>&1; then
278	ac_cv_prog_gxx=yes
279	else
280	ac_cv_prog_gxx=no
281	fi])])
282
283	dnl Test whether for Fortran 77 compiler is `g77' (the GNU Fortran 77
284	dnl Compiler). This test depends on whether the Fortran 77 compiler can
285	dnl do CPP pre-processing.
286	dnl
287	dnl AC_PROG_F77_GNU()
288	AC_DEFUN(AC_PROG_F77_GNU,
289	[AC_CACHE_CHECK(whether we are using GNU Fortran 77, ac_cv_prog_g77,
290	[cat > conftest.fpp <<EOF
291	#ifdef __GNUC__
292	yes
293	#endif
294	EOF
295	if AC_TRY_COMMAND($F77 -E conftest.fpp) \| egrep yes >/dev/null 2>&1; then
296	ac_cv_prog_g77=yes
297	else
298	ac_cv_prog_g77=no
299	fi])])
300
301	AC_DEFUN(AC_PROG_CC_G,
302	[AC_CACHE_CHECK(whether ${CC-cc} accepts -g, ac_cv_prog_cc_g,
303	[echo 'void f(){}' > conftest.c
304	if test -z "`${CC-cc} -g -c conftest.c 2>&1`"; then
305	ac_cv_prog_cc_g=yes
306	else
307	ac_cv_prog_cc_g=no
308	fi
309	rm -f conftest*
310	])])
311
312	AC_DEFUN(AC_PROG_CXX_G,
313	[AC_CACHE_CHECK(whether ${CXX-g++} accepts -g, ac_cv_prog_cxx_g,
314	[echo 'void f(){}' > conftest.cc
315	if test -z "`${CXX-g++} -g -c conftest.cc 2>&1`"; then
316	ac_cv_prog_cxx_g=yes
317	else
318	ac_cv_prog_cxx_g=no
319	fi
320	rm -f conftest*
321	])])
322
323	dnl Test whether the Fortran 77 compiler can accept the `-g' option to
324	dnl enable debugging.
325	dnl
326	dnl AC_PROG_F77_G()
327	AC_DEFUN(AC_PROG_F77_G,
328	[AC_CACHE_CHECK(whether $F77 accepts -g, ac_cv_prog_f77_g,
329	[cat > conftest.f << EOF
330	program conftest
331	end
332	EOF
333	if test -z "`$F77 -g -c conftest.f 2>&1`"; then
334	ac_cv_prog_f77_g=yes
335	else
336	ac_cv_prog_f77_g=no
337	fi
338	rm -f conftest*
339	])])
340
341	AC_DEFUN(AC_PROG_GCC_TRADITIONAL,
342	[AC_REQUIRE([AC_PROG_CC])dnl
343	AC_REQUIRE([AC_PROG_CPP])dnl
344	if test $ac_cv_prog_gcc = yes; then
345	AC_CACHE_CHECK(whether ${CC-cc} needs -traditional,
346	ac_cv_prog_gcc_traditional,
347	[ ac_pattern="Autoconf.*'x'"
348	AC_EGREP_CPP($ac_pattern, [#include <sgtty.h>
349	Autoconf TIOCGETP],
350	ac_cv_prog_gcc_traditional=yes, ac_cv_prog_gcc_traditional=no)
351
352	if test $ac_cv_prog_gcc_traditional = no; then
353	AC_EGREP_CPP($ac_pattern, [#include <termio.h>
354	Autoconf TCGETA],
355	ac_cv_prog_gcc_traditional=yes)
356	fi])
357	if test $ac_cv_prog_gcc_traditional = yes; then
358	CC="$CC -traditional"
359	fi
360	fi
361	])
362
363	AC_DEFUN(AC_PROG_CC_C_O,
364	[if test "x$CC" != xcc; then
365	AC_MSG_CHECKING(whether $CC and cc understand -c and -o together)
366	else
367	AC_MSG_CHECKING(whether cc understands -c and -o together)
368	fi
369	set dummy $CC; ac_cc="`echo [$]2 \|
370	changequote(, )dnl
371	sed -e 's/[^a-zA-Z0-9_]/_/g' -e 's/^[0-9]/_/'`"
372	changequote([, ])dnl
373	AC_CACHE_VAL(ac_cv_prog_cc_${ac_cc}_c_o,
374	[echo 'foo(){}' > conftest.c
375	# Make sure it works both with $CC and with simple cc.
376	# We do the test twice because some compilers refuse to overwrite an
377	# existing .o file with -o, though they will create one.
378	ac_try='${CC-cc} -c conftest.c -o conftest.o 1>&AC_FD_CC'
379	if AC_TRY_EVAL(ac_try) &&
380	test -f conftest.o && AC_TRY_EVAL(ac_try);
381	then
382	eval ac_cv_prog_cc_${ac_cc}_c_o=yes
383	if test "x$CC" != xcc; then
384	# Test first that cc exists at all.
385	if AC_TRY_COMMAND(cc -c conftest.c 1>&AC_FD_CC); then
386	ac_try='cc -c conftest.c -o conftest.o 1>&AC_FD_CC'
387	if AC_TRY_EVAL(ac_try) &&
388	test -f conftest.o && AC_TRY_EVAL(ac_try);
389	then
390	# cc works too.
391	:
392	else
393	# cc exists but doesn't like -o.
394	eval ac_cv_prog_cc_${ac_cc}_c_o=no
395	fi
396	fi
397	fi
398	else
399	eval ac_cv_prog_cc_${ac_cc}_c_o=no
400	fi
401	rm -f conftest*
402	])dnl
403	if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = yes"; then
404	AC_MSG_RESULT(yes)
405	else
406	AC_MSG_RESULT(no)
407	AC_DEFINE(NO_MINUS_C_MINUS_O)
408	fi
409	])
410
411	dnl Test if the Fortran 77 compiler accepts the options `-c' and `-o'
412	dnl simultaneously, and define `F77_NO_MINUS_C_MINUS_O' if it does not.
413	dnl
414	dnl The usefulness of this macro is questionable, as I can't really see
415	dnl why anyone would use it. The only reason I include it is for
416	dnl completeness, since a similar test exists for the C compiler.
417	dnl
418	dnl AC_PROG_F77_C_O
419	AC_DEFUN(AC_PROG_F77_C_O,
420	[AC_BEFORE([$0], [AC_PROG_F77])dnl
421	AC_MSG_CHECKING(whether $F77 understand -c and -o together)
422	set dummy $F77; ac_f77="`echo [$]2 \|
423	changequote(, )dnl
424	sed -e 's/[^a-zA-Z0-9_]/_/g' -e 's/^[0-9]/_/'`"
425	changequote([, ])dnl
426	AC_CACHE_VAL(ac_cv_prog_f77_${ac_f77}_c_o,
427	[cat > conftest.f << EOF
428	program conftest
429	end
430	EOF
431	# We do the `AC_TRY_EVAL' test twice because some compilers refuse to
432	# overwrite an existing `.o' file with `-o', although they will create
433	# one.
434	ac_try='$F77 $FFLAGS -c conftest.f -o conftest.o 1>&AC_FD_CC'
435	if AC_TRY_EVAL(ac_try) && test -f conftest.o && AC_TRY_EVAL(ac_try); then
436	eval ac_cv_prog_f77_${ac_f77}_c_o=yes
437	else
438	eval ac_cv_prog_f77_${ac_f77}_c_o=no
439	fi
440	rm -f conftest*
441	])dnl
442	if eval "test \"`echo '$ac_cv_prog_f77_'${ac_f77}_c_o`\" = yes"; then
443	AC_MSG_RESULT(yes)
444	else
445	AC_MSG_RESULT(no)
446	AC_DEFINE(F77_NO_MINUS_C_MINUS_O)
447	fi
448	])
449
450	dnl Define SET_MAKE to set ${MAKE} if make doesn't.
451	AC_DEFUN(AC_PROG_MAKE_SET,
452	[AC_MSG_CHECKING(whether ${MAKE-make} sets \${MAKE})
453	set dummy ${MAKE-make}; ac_make=`echo "[$]2" \| sed 'y%./+-%__p_%'`
454	AC_CACHE_VAL(ac_cv_prog_make_${ac_make}_set,
455	[cat > conftestmake <<\EOF
456	all:
457	@echo 'ac_maketemp="${MAKE}"'
458	EOF
459	changequote(, )dnl
460	# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
461	eval `${MAKE-make} -f conftestmake 2>/dev/null \| grep temp=`
462	changequote([, ])dnl
463	if test -n "$ac_maketemp"; then
464	eval ac_cv_prog_make_${ac_make}_set=yes
465	else
466	eval ac_cv_prog_make_${ac_make}_set=no
467	fi
468	rm -f conftestmake])dnl
469	if eval "test \"`echo '$ac_cv_prog_make_'${ac_make}_set`\" = yes"; then
470	AC_MSG_RESULT(yes)
471	SET_MAKE=
472	else
473	AC_MSG_RESULT(no)
474	SET_MAKE="MAKE=${MAKE-make}"
475	fi
476	AC_SUBST([SET_MAKE])dnl
477	])
478
479	AC_DEFUN(AC_PROG_RANLIB,
480	[AC_CHECK_PROG(RANLIB, ranlib, ranlib, :)])
481
482	dnl Check for mawk first since it's generally faster.
483	AC_DEFUN(AC_PROG_AWK,
484	[AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])
485
486	AC_DEFUN(AC_PROG_YACC,
487	[AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])
488
489	AC_DEFUN(AC_PROG_CPP,
490	[AC_MSG_CHECKING(how to run the C preprocessor)
491	# On Suns, sometimes $CPP names a directory.
492	if test -n "$CPP" && test -d "$CPP"; then
493	CPP=
494	fi
495	if test -z "$CPP"; then
496	AC_CACHE_VAL(ac_cv_prog_CPP,
497	[ # This must be in double quotes, not single quotes, because CPP may get
498	# substituted into the Makefile and "${CC-cc}" will confuse make.
499	CPP="${CC-cc} -E"
500	# On the NeXT, cc -E runs the code through the compiler's parser,
501	# not just through cpp.
502	dnl Use a header file that comes with gcc, so configuring glibc
503	dnl with a fresh cross-compiler works.
504	AC_TRY_CPP([#include <assert.h>
505	Syntax Error], ,
506	CPP="${CC-cc} -E -traditional-cpp"
507	AC_TRY_CPP([#include <assert.h>
508	Syntax Error], ,
509	CPP="${CC-cc} -nologo -E"
510	AC_TRY_CPP([#include <assert.h>
511	Syntax Error], , CPP=/lib/cpp)))
512	ac_cv_prog_CPP="$CPP"])dnl
513	CPP="$ac_cv_prog_CPP"
514	else
515	ac_cv_prog_CPP="$CPP"
516	fi
517	AC_MSG_RESULT($CPP)
518	AC_SUBST(CPP)dnl
519	])
520
521	AC_DEFUN(AC_PROG_CXXCPP,
522	[AC_MSG_CHECKING(how to run the C++ preprocessor)
523	if test -z "$CXXCPP"; then
524	AC_CACHE_VAL(ac_cv_prog_CXXCPP,
525	[AC_LANG_SAVE[]dnl
526	AC_LANG_CPLUSPLUS[]dnl
527	CXXCPP="${CXX-g++} -E"
528	AC_TRY_CPP([#include <stdlib.h>], , CXXCPP=/lib/cpp)
529	ac_cv_prog_CXXCPP="$CXXCPP"
530	AC_LANG_RESTORE[]dnl
531	fi])dnl
532	CXXCPP="$ac_cv_prog_CXXCPP"
533	AC_MSG_RESULT($CXXCPP)
534	AC_SUBST(CXXCPP)dnl
535	])
536
537	dnl Require finding the C or C++ preprocessor, whichever is the
538	dnl current language.
539	AC_DEFUN(AC_REQUIRE_CPP,
540	[ifelse(AC_LANG, C, [AC_REQUIRE([AC_PROG_CPP])], [AC_REQUIRE([AC_PROG_CXXCPP])])])
541
542	AC_DEFUN(AC_PROG_LEX,
543	[AC_CHECK_PROG(LEX, flex, flex, lex)
544	if test -z "$LEXLIB"
545	then
546	case "$LEX" in
547	flex*) ac_lib=fl ;;
548	*) ac_lib=l ;;
549	esac
550	AC_CHECK_LIB($ac_lib, yywrap, LEXLIB="-l$ac_lib")
551	fi
552	AC_SUBST(LEXLIB)])
553
554	dnl Check if lex declares yytext as a char * by default, not a char[].
555	undefine([AC_DECL_YYTEXT])
556	AC_DEFUN(AC_DECL_YYTEXT,
557	[AC_REQUIRE_CPP()dnl
558	AC_REQUIRE([AC_PROG_LEX])dnl
559	AC_CACHE_CHECK(lex output file root, ac_cv_prog_lex_root,
560	[# The minimal lex program is just a single line: %%. But some broken lexes
561	# (Solaris, I think it was) want two %% lines, so accommodate them.
562	echo '%%
563	%%' \| $LEX
564	if test -f lex.yy.c; then
565	ac_cv_prog_lex_root=lex.yy
566	elif test -f lexyy.c; then
567	ac_cv_prog_lex_root=lexyy
568	else
569	AC_MSG_ERROR(cannot find output from $LEX; giving up)
570	fi])
571	LEX_OUTPUT_ROOT=$ac_cv_prog_lex_root
572	AC_SUBST(LEX_OUTPUT_ROOT)dnl
573
574	AC_CACHE_CHECK(whether yytext is a pointer, ac_cv_prog_lex_yytext_pointer,
575	[# POSIX says lex can declare yytext either as a pointer or an array; the
576	# default is implementation-dependent. Figure out which it is, since
577	# not all implementations provide the %pointer and %array declarations.
578	ac_cv_prog_lex_yytext_pointer=no
579	echo 'extern char *yytext;' >>$LEX_OUTPUT_ROOT.c
580	ac_save_LIBS="$LIBS"
581	LIBS="$LIBS $LEXLIB"
582	AC_TRY_LINK(`cat $LEX_OUTPUT_ROOT.c`, , ac_cv_prog_lex_yytext_pointer=yes)
583	LIBS="$ac_save_LIBS"
584	rm -f "${LEX_OUTPUT_ROOT}.c"
585	])
586	dnl
587	if test $ac_cv_prog_lex_yytext_pointer = yes; then
588	AC_DEFINE(YYTEXT_POINTER)
589	fi
590	])
591
592	AC_DEFUN(AC_PROG_INSTALL,
593	[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
594	# Find a good install program. We prefer a C program (faster),
595	# so one script is as good as another. But avoid the broken or
596	# incompatible versions:
597	# SysV /etc/install, /usr/sbin/install
598	# SunOS /usr/etc/install
599	# IRIX /sbin/install
600	# AIX /bin/install
601	# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
602	# AFS /usr/afsws/bin/install, which mishandles nonexistent args
603	# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
604	# ./install, which can be erroneously created by make from ./install.sh.
605	AC_MSG_CHECKING(for a BSD compatible install)
606	if test -z "$INSTALL"; then
607	AC_CACHE_VAL(ac_cv_path_install,
608	[ IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$PATH_IFS"
609	for ac_dir in $PATH; do
610	# Account for people who put trailing slashes in PATH elements.
611	case "$ac_dir/" in
612	/\|./\|.//\|/etc/\|/usr/sbin/\|/usr/etc/\|/sbin/\|/usr/afsws/bin/\|/usr/ucb/) ;;
613	# We reject the install program from OS/2 or W3.1
614	/OS2\|/OS2/\|/WINDOWS\|/WINDOWS/) ;;
615	*)
616	# OSF1 and SCO ODT 3.0 have their own names for install.
617	# Don't use installbsd from OSF since it installs stuff as root
618	# by default.
619	for ac_prog in ginstall scoinst install; do
620	if test -f $ac_dir/$ac_prog$ac_exeext; then
621	if test $ac_prog = install &&
622	grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
623	# AIX install. It has an incompatible calling convention.
624	:
625	else
626	ac_cv_path_install="$ac_dir/$ac_prog$ac_exeext -c"
627	break 2
628	fi
629	fi
630	done
631	;;
632	esac
633	done
634	IFS="$ac_save_IFS"
635	])dnl
636	if test "${ac_cv_path_install+set}" = set; then
637	INSTALL="$ac_cv_path_install"
638	else
639	# As a last resort, use the slow shell script. We don't cache a
640	# path for INSTALL within a source directory, because that will
641	# break other packages using the cache if that directory is
642	# removed, or if the path is relative.
643	INSTALL="$ac_install_sh"
644	fi
645	fi
646	dnl We do special magic for INSTALL instead of AC_SUBST, to get
647	dnl relative paths right.
648	AC_MSG_RESULT($INSTALL)
649
650	# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
651	# It thinks the first close brace ends the variable substitution.
652	test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
653	AC_SUBST(INSTALL_PROGRAM)dnl
654
655	test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL_PROGRAM}'
656	AC_SUBST(INSTALL_SCRIPT)dnl
657
658	test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
659	AC_SUBST(INSTALL_DATA)dnl
660	])
661
662	AC_DEFUN(AC_PROG_LN_S,
663	[AC_MSG_CHECKING(whether ln -s works)
664	AC_CACHE_VAL(ac_cv_prog_LN_S,
665	[rm -f conftestdata
666	if ln -s X conftestdata 2>/dev/null
667	then
668	rm -f conftestdata
669	ac_cv_prog_LN_S="ln -s"
670	else
671	echo A > conftestdata;
672	if ln conftestdata conftestdata2 2>/dev/null; then
673	ac_cv_prog_LN_S=ln
674	else
675	ac_cv_prog_LN_S=cp
676	fi
677	fi
678	rm -f conftestdata*])dnl
679	LN_S="$ac_cv_prog_LN_S"
680	if test "$ac_cv_prog_LN_S" = "ln -s"; then
681	AC_MSG_RESULT(yes)
682	else
683	AC_MSG_RESULT(no)
684	fi
685	AC_SUBST(LN_S)dnl
686	])
687
688	define(AC_RSH,
689	[errprint(__file__:__line__: [$0] has been removed; replace it with equivalent code
690	)m4exit(4)])
691
692
693	dnl ### Checks for header files
694
695
696	AC_DEFUN(AC_HEADER_STDC,
697	[AC_REQUIRE_CPP()dnl
698	AC_CACHE_CHECK(for ANSI C header files, ac_cv_header_stdc,
699	[AC_TRY_CPP([#include <stdlib.h>
700	#include <stdarg.h>
701	#include <string.h>
702	#include <float.h>], ac_cv_header_stdc=yes, ac_cv_header_stdc=no)
703
704	if test $ac_cv_header_stdc = yes; then
705	# SunOS 4.x string.h does not declare mem*, contrary to ANSI.
706	AC_EGREP_HEADER(memchr, string.h, , ac_cv_header_stdc=no)
707	fi
708
709	if test $ac_cv_header_stdc = yes; then
710	# ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
711	AC_EGREP_HEADER(free, stdlib.h, , ac_cv_header_stdc=no)
712	fi
713
714	if test $ac_cv_header_stdc = yes; then
715	# /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
716	AC_TRY_RUN([#include <ctype.h>
717	#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
718	#define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
719	#define XOR(e, f) (((e) && !(f)) \|\| (!(e) && (f)))
720	int main () { int i; for (i = 0; i < 256; i++)
721	if (XOR (islower (i), ISLOWER (i)) \|\| toupper (i) != TOUPPER (i)) exit(2);
722	exit (0); }
723	], , ac_cv_header_stdc=no, :)
724	fi])
725	if test $ac_cv_header_stdc = yes; then
726	AC_DEFINE(STDC_HEADERS)
727	fi
728	])
729
730	AC_DEFUN(AC_UNISTD_H,
731	[AC_OBSOLETE([$0], [; instead use AC_CHECK_HEADERS(unistd.h)])dnl
732	AC_CHECK_HEADER(unistd.h, AC_DEFINE(HAVE_UNISTD_H))])
733
734	AC_DEFUN(AC_USG,
735	[AC_OBSOLETE([$0],
736	[; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])dnl
737	AC_MSG_CHECKING([for BSD string and memory functions])
738	AC_TRY_LINK([#include <strings.h>], [rindex(0, 0); bzero(0, 0);],
739	[AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no); AC_DEFINE(USG)])])
740
741
742	dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
743	dnl To avoid problems, don't check for gcc2 built-ins.
744	AC_DEFUN(AC_MEMORY_H,
745	[AC_OBSOLETE([$0], [; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])dnl
746	AC_MSG_CHECKING(whether string.h declares mem functions)
747	AC_EGREP_HEADER(memchr, string.h, ac_found=yes, ac_found=no)
748	AC_MSG_RESULT($ac_found)
749	if test $ac_found = no; then
750	AC_CHECK_HEADER(memory.h, [AC_DEFINE(NEED_MEMORY_H)])
751	fi
752	])
753
754	AC_DEFUN(AC_HEADER_MAJOR,
755	[AC_CACHE_CHECK(whether sys/types.h defines makedev,
756	ac_cv_header_sys_types_h_makedev,
757	[AC_TRY_LINK([#include <sys/types.h>], [return makedev(0, 0);],
758	ac_cv_header_sys_types_h_makedev=yes, ac_cv_header_sys_types_h_makedev=no)
759	])
760
761	if test $ac_cv_header_sys_types_h_makedev = no; then
762	AC_CHECK_HEADER(sys/mkdev.h, [AC_DEFINE(MAJOR_IN_MKDEV)])
763
764	if test $ac_cv_header_sys_mkdev_h = no; then
765	AC_CHECK_HEADER(sys/sysmacros.h, [AC_DEFINE(MAJOR_IN_SYSMACROS)])
766	fi
767	fi
768	])
769
770	AC_DEFUN(AC_HEADER_DIRENT,
771	[ac_header_dirent=no
772	AC_CHECK_HEADERS_DIRENT(dirent.h sys/ndir.h sys/dir.h ndir.h,
773	[ac_header_dirent=$ac_hdr; break])
774	# Two versions of opendir et al. are in -ldir and -lx on SCO Xenix.
775	if test $ac_header_dirent = dirent.h; then
776	AC_CHECK_LIB(dir, opendir, LIBS="$LIBS -ldir")
777	else
778	AC_CHECK_LIB(x, opendir, LIBS="$LIBS -lx")
779	fi
780	])
781
782	dnl Like AC_CHECK_HEADER, except also make sure that HEADER-FILE
783	dnl defines the type `DIR'. dirent.h on NextStep 3.2 doesn't.
784	dnl AC_CHECK_HEADER_DIRENT(HEADER-FILE, ACTION-IF-FOUND)
785	AC_DEFUN(AC_CHECK_HEADER_DIRENT,
786	[ac_safe=`echo "$1" \| sed 'y%./+-%__p_%'`
787	AC_MSG_CHECKING([for $1 that defines DIR])
788	AC_CACHE_VAL(ac_cv_header_dirent_$ac_safe,
789	[AC_TRY_COMPILE([#include <sys/types.h>
790	#include <$1>], [DIR *dirp = 0;],
791	eval "ac_cv_header_dirent_$ac_safe=yes",
792	eval "ac_cv_header_dirent_$ac_safe=no")])dnl
793	if eval "test \"`echo '$ac_cv_header_dirent_'$ac_safe`\" = yes"; then
794	AC_MSG_RESULT(yes)
795	$2
796	else
797	AC_MSG_RESULT(no)
798	fi
799	])
800
801	dnl Like AC_CHECK_HEADERS, except succeed only for a HEADER-FILE that
802	dnl defines `DIR'.
803	dnl AC_CHECK_HEADERS_DIRENT(HEADER-FILE... [, ACTION])
804	define(AC_CHECK_HEADERS_DIRENT,
805	[for ac_hdr in $1
806	do
807	AC_CHECK_HEADER_DIRENT($ac_hdr,
808	[changequote(, )dnl
809	ac_tr_hdr=HAVE_`echo $ac_hdr \| sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
810	changequote([, ])dnl
811	AC_DEFINE_UNQUOTED($ac_tr_hdr) $2])dnl
812	done])
813
814	AC_DEFUN(AC_DIR_HEADER,
815	[AC_OBSOLETE([$0], [; instead use AC_HEADER_DIRENT])dnl
816	ac_header_dirent=no
817	for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
818	AC_CHECK_HEADER_DIRENT($ac_hdr, [ac_header_dirent=$ac_hdr; break])
819	done
820
821	case "$ac_header_dirent" in
822	dirent.h) AC_DEFINE(DIRENT) ;;
823	sys/ndir.h) AC_DEFINE(SYSNDIR) ;;
824	sys/dir.h) AC_DEFINE(SYSDIR) ;;
825	ndir.h) AC_DEFINE(NDIR) ;;
826	esac
827
828	AC_CACHE_CHECK(whether closedir returns void, ac_cv_func_closedir_void,
829	[AC_TRY_RUN([#include <sys/types.h>
830	#include <$ac_header_dirent>
831	int closedir(); main() { exit(closedir(opendir(".")) != 0); }],
832	ac_cv_func_closedir_void=no, ac_cv_func_closedir_void=yes, ac_cv_func_closedir_void=yes)])
833	if test $ac_cv_func_closedir_void = yes; then
834	AC_DEFINE(VOID_CLOSEDIR)
835	fi
836	])
837
838	AC_DEFUN(AC_HEADER_STAT,
839	[AC_CACHE_CHECK(whether stat file-mode macros are broken,
840	ac_cv_header_stat_broken,
841	[AC_EGREP_CPP([You lose], [#include <sys/types.h>
842	#include <sys/stat.h>
843
844	#if defined(S_ISBLK) && defined(S_IFDIR)
845	# if S_ISBLK (S_IFDIR)
846	You lose.
847	# endif
848	#endif
849
850	#if defined(S_ISBLK) && defined(S_IFCHR)
851	# if S_ISBLK (S_IFCHR)
852	You lose.
853	# endif
854	#endif
855
856	#if defined(S_ISLNK) && defined(S_IFREG)
857	# if S_ISLNK (S_IFREG)
858	You lose.
859	# endif
860	#endif
861
862	#if defined(S_ISSOCK) && defined(S_IFREG)
863	# if S_ISSOCK (S_IFREG)
864	You lose.
865	# endif
866	#endif
867	], ac_cv_header_stat_broken=yes, ac_cv_header_stat_broken=no)])
868	if test $ac_cv_header_stat_broken = yes; then
869	AC_DEFINE(STAT_MACROS_BROKEN)
870	fi
871	])
872
873	AC_DEFUN(AC_DECL_SYS_SIGLIST,
874	[AC_CACHE_CHECK([for sys_siglist declaration in signal.h or unistd.h],
875	ac_cv_decl_sys_siglist,
876	[AC_TRY_COMPILE([#include <sys/types.h>
877	#include <signal.h>
878	/* NetBSD declares sys_siglist in unistd.h. */
879	#ifdef HAVE_UNISTD_H
880	#include <unistd.h>
881	#endif], [char msg = (sys_siglist + 1);],
882	ac_cv_decl_sys_siglist=yes, ac_cv_decl_sys_siglist=no)])
883	if test $ac_cv_decl_sys_siglist = yes; then
884	AC_DEFINE(SYS_SIGLIST_DECLARED)
885	fi
886	])
887
888	AC_DEFUN(AC_HEADER_SYS_WAIT,
889	[AC_CACHE_CHECK([for sys/wait.h that is POSIX.1 compatible],
890	ac_cv_header_sys_wait_h,
891	[AC_TRY_COMPILE([#include <sys/types.h>
892	#include <sys/wait.h>
893	#ifndef WEXITSTATUS
894	#define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
895	#endif
896	#ifndef WIFEXITED
897	#define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
898	#endif], [int s;
899	wait (&s);
900	s = WIFEXITED (s) ? WEXITSTATUS (s) : 1;],
901	ac_cv_header_sys_wait_h=yes, ac_cv_header_sys_wait_h=no)])
902	if test $ac_cv_header_sys_wait_h = yes; then
903	AC_DEFINE(HAVE_SYS_WAIT_H)
904	fi
905	])
906
907
908	dnl ### Checks for typedefs
909
910
911	AC_DEFUN(AC_TYPE_GETGROUPS,
912	[AC_REQUIRE([AC_TYPE_UID_T])dnl
913	AC_CACHE_CHECK(type of array argument to getgroups, ac_cv_type_getgroups,
914	[AC_TRY_RUN(
915	changequote(<<, >>)dnl
916	<<
917	/* Thanks to Mike Rendell for this test. */
918	#include <sys/types.h>
919	#define NGID 256
920	#undef MAX
921	#define MAX(x, y) ((x) > (y) ? (x) : (y))
922	main()
923	{
924	gid_t gidset[NGID];
925	int i, n;
926	union { gid_t gval; long lval; } val;
927
928	val.lval = -1;
929	for (i = 0; i < NGID; i++)
930	gidset[i] = val.gval;
931	n = getgroups (sizeof (gidset) / MAX (sizeof (int), sizeof (gid_t)) - 1,
932	gidset);
933	/* Exit non-zero if getgroups seems to require an array of ints. This
934	happens when gid_t is short but getgroups modifies an array of ints. */
935	exit ((n > 0 && gidset[n] != val.gval) ? 1 : 0);
936	}
937	>>,
938	changequote([, ])dnl
939	ac_cv_type_getgroups=gid_t, ac_cv_type_getgroups=int,
940	ac_cv_type_getgroups=cross)
941	if test $ac_cv_type_getgroups = cross; then
942	dnl When we can't run the test program (we are cross compiling), presume
943	dnl that <unistd.h> has either an accurate prototype for getgroups or none.
944	dnl Old systems without prototypes probably use int.
945	AC_EGREP_HEADER([getgroups.int.gid_t], unistd.h,
946	ac_cv_type_getgroups=gid_t, ac_cv_type_getgroups=int)
947	fi])
948	AC_DEFINE_UNQUOTED(GETGROUPS_T, $ac_cv_type_getgroups)
949	])
950
951	AC_DEFUN(AC_TYPE_UID_T,
952	[AC_CACHE_CHECK(for uid_t in sys/types.h, ac_cv_type_uid_t,
953	[AC_EGREP_HEADER(uid_t, sys/types.h,
954	ac_cv_type_uid_t=yes, ac_cv_type_uid_t=no)])
955	if test $ac_cv_type_uid_t = no; then
956	AC_DEFINE(uid_t, int)
957	AC_DEFINE(gid_t, int)
958	fi
959	])
960
961	AC_DEFUN(AC_TYPE_SIZE_T,
962	[AC_CHECK_TYPE(size_t, unsigned)])
963
964	AC_DEFUN(AC_TYPE_PID_T,
965	[AC_CHECK_TYPE(pid_t, int)])
966
967	AC_DEFUN(AC_TYPE_OFF_T,
968	[AC_CHECK_TYPE(off_t, long)])
969
970	AC_DEFUN(AC_TYPE_MODE_T,
971	[AC_CHECK_TYPE(mode_t, int)])
972
973	dnl Note that identifiers starting with SIG are reserved by ANSI C.
974	AC_DEFUN(AC_TYPE_SIGNAL,
975	[AC_CACHE_CHECK([return type of signal handlers], ac_cv_type_signal,
976	[AC_TRY_COMPILE([#include <sys/types.h>
977	#include <signal.h>
978	#ifdef signal
979	#undef signal
980	#endif
981	#ifdef __cplusplus
982	extern "C" void (signal (int, void ()(int)))(int);
983	#else
984	void (*signal ()) ();
985	#endif
986	],
987	[int i;], ac_cv_type_signal=void, ac_cv_type_signal=int)])
988	AC_DEFINE_UNQUOTED(RETSIGTYPE, $ac_cv_type_signal)
989	])
990
991
992	dnl ### Checks for functions
993
994
995	AC_DEFUN(AC_FUNC_CLOSEDIR_VOID,
996	[AC_REQUIRE([AC_HEADER_DIRENT])dnl
997	AC_CACHE_CHECK(whether closedir returns void, ac_cv_func_closedir_void,
998	[AC_TRY_RUN([#include <sys/types.h>
999	#include <$ac_header_dirent>
1000	int closedir(); main() { exit(closedir(opendir(".")) != 0); }],
1001	ac_cv_func_closedir_void=no, ac_cv_func_closedir_void=yes, ac_cv_func_closedir_void=yes)])
1002	if test $ac_cv_func_closedir_void = yes; then
1003	AC_DEFINE(CLOSEDIR_VOID)
1004	fi
1005	])
1006
1007	AC_DEFUN(AC_FUNC_FNMATCH,
1008	[AC_CACHE_CHECK(for working fnmatch, ac_cv_func_fnmatch_works,
1009	# Some versions of Solaris or SCO have a broken fnmatch function.
1010	# So we run a test program. If we are cross-compiling, take no chance.
1011	# Thanks to John Oleynick and Franc,ois Pinard for this test.
1012	[AC_TRY_RUN([main() { exit (fnmatch ("a*", "abc", 0) != 0); }],
1013	ac_cv_func_fnmatch_works=yes, ac_cv_func_fnmatch_works=no,
1014	ac_cv_func_fnmatch_works=no)])
1015	if test $ac_cv_func_fnmatch_works = yes; then
1016	AC_DEFINE(HAVE_FNMATCH)
1017	fi
1018	])
1019
1020	AC_DEFUN(AC_FUNC_MMAP,
1021	[AC_CHECK_HEADERS(unistd.h)
1022	AC_CHECK_FUNCS(getpagesize)
1023	AC_CACHE_CHECK(for working mmap, ac_cv_func_mmap_fixed_mapped,
1024	[AC_TRY_RUN([
1025	/* Thanks to Mike Haertel and Jim Avera for this test.
1026	Here is a matrix of mmap possibilities:
1027	mmap private not fixed
1028	mmap private fixed at somewhere currently unmapped
1029	mmap private fixed at somewhere already mapped
1030	mmap shared not fixed
1031	mmap shared fixed at somewhere currently unmapped
1032	mmap shared fixed at somewhere already mapped
1033	For private mappings, we should verify that changes cannot be read()
1034	back from the file, nor mmap's back from the file at a different
1035	address. (There have been systems where private was not correctly
1036	implemented like the infamous i386 svr4.0, and systems where the
1037	VM page cache was not coherent with the filesystem buffer cache
1038	like early versions of FreeBSD and possibly contemporary NetBSD.)
1039	For shared mappings, we should conversely verify that changes get
1040	propogated back to all the places they're supposed to be.
1041
1042	Grep wants private fixed already mapped.
1043	The main things grep needs to know about mmap are:
1044	* does it exist and is it safe to write into the mmap'd area
1045	* how to use it (BSD variants) */
1046	#include <sys/types.h>
1047	#include <fcntl.h>
1048	#include <sys/mman.h>
1049
1050	/* This mess was copied from the GNU getpagesize.h. */
1051	#ifndef HAVE_GETPAGESIZE
1052	# ifdef HAVE_UNISTD_H
1053	# include <unistd.h>
1054	# endif
1055
1056	/* Assume that all systems that can run configure have sys/param.h. */
1057	# ifndef HAVE_SYS_PARAM_H
1058	# define HAVE_SYS_PARAM_H 1
1059	# endif
1060
1061	# ifdef _SC_PAGESIZE
1062	# define getpagesize() sysconf(_SC_PAGESIZE)
1063	# else /* no _SC_PAGESIZE */
1064	# ifdef HAVE_SYS_PARAM_H
1065	# include <sys/param.h>
1066	# ifdef EXEC_PAGESIZE
1067	# define getpagesize() EXEC_PAGESIZE
1068	# else /* no EXEC_PAGESIZE */
1069	# ifdef NBPG
1070	# define getpagesize() NBPG * CLSIZE
1071	# ifndef CLSIZE
1072	# define CLSIZE 1
1073	# endif /* no CLSIZE */
1074	# else /* no NBPG */
1075	# ifdef NBPC
1076	# define getpagesize() NBPC
1077	# else /* no NBPC */
1078	# ifdef PAGESIZE
1079	# define getpagesize() PAGESIZE
1080	# endif /* PAGESIZE */
1081	# endif /* no NBPC */
1082	# endif /* no NBPG */
1083	# endif /* no EXEC_PAGESIZE */
1084	# else /* no HAVE_SYS_PARAM_H */
1085	# define getpagesize() 8192 /* punt totally */
1086	# endif /* no HAVE_SYS_PARAM_H */
1087	# endif /* no _SC_PAGESIZE */
1088
1089	#endif /* no HAVE_GETPAGESIZE */
1090
1091	#ifdef __cplusplus
1092	extern "C" { void *malloc(unsigned); }
1093	#else
1094	char *malloc();
1095	#endif
1096
1097	int
1098	main()
1099	{
1100	char data, data2, *data3;
1101	int i, pagesize;
1102	int fd;
1103
1104	pagesize = getpagesize();
1105
1106	/*
1107	* First, make a file with some known garbage in it.
1108	*/
1109	data = malloc(pagesize);
1110	if (!data)
1111	exit(1);
1112	for (i = 0; i < pagesize; ++i)
1113	*(data + i) = rand();
1114	umask(0);
1115	fd = creat("conftestmmap", 0600);
1116	if (fd < 0)
1117	exit(1);
1118	if (write(fd, data, pagesize) != pagesize)
1119	exit(1);
1120	close(fd);
1121
1122	/*
1123	* Next, try to mmap the file at a fixed address which
1124	* already has something else allocated at it. If we can,
1125	* also make sure that we see the same garbage.
1126	*/
1127	fd = open("conftestmmap", O_RDWR);
1128	if (fd < 0)
1129	exit(1);
1130	data2 = malloc(2 * pagesize);
1131	if (!data2)
1132	exit(1);
1133	data2 += (pagesize - ((int) data2 & (pagesize - 1))) & (pagesize - 1);
1134	if (data2 != mmap(data2, pagesize, PROT_READ \| PROT_WRITE,
1135	MAP_PRIVATE \| MAP_FIXED, fd, 0L))
1136	exit(1);
1137	for (i = 0; i < pagesize; ++i)
1138	if ((data + i) != (data2 + i))
1139	exit(1);
1140
1141	/*
1142	* Finally, make sure that changes to the mapped area
1143	* do not percolate back to the file as seen by read().
1144	* (This is a bug on some variants of i386 svr4.0.)
1145	*/
1146	for (i = 0; i < pagesize; ++i)
1147	(data2 + i) = (data2 + i) + 1;
1148	data3 = malloc(pagesize);
1149	if (!data3)
1150	exit(1);
1151	if (read(fd, data3, pagesize) != pagesize)
1152	exit(1);
1153	for (i = 0; i < pagesize; ++i)
1154	if ((data + i) != (data3 + i))
1155	exit(1);
1156	close(fd);
1157	unlink("conftestmmap");
1158	exit(0);
1159	}
1160	], ac_cv_func_mmap_fixed_mapped=yes, ac_cv_func_mmap_fixed_mapped=no,
1161	ac_cv_func_mmap_fixed_mapped=no)])
1162	if test $ac_cv_func_mmap_fixed_mapped = yes; then
1163	AC_DEFINE(HAVE_MMAP)
1164	fi
1165	])
1166
1167	AC_DEFUN(AC_FUNC_GETPGRP,
1168	[AC_CACHE_CHECK(whether getpgrp takes no argument, ac_cv_func_getpgrp_void,
1169	[AC_TRY_RUN([
1170	/*
1171	* If this system has a BSD-style getpgrp(),
1172	* which takes a pid argument, exit unsuccessfully.
1173	*
1174	* Snarfed from Chet Ramey's bash pgrp.c test program
1175	*/
1176	#include <stdio.h>
1177	#include <sys/types.h>
1178
1179	int pid;
1180	int pg1, pg2, pg3, pg4;
1181	int ng, np, s, child;
1182
1183	main()
1184	{
1185	pid = getpid();
1186	pg1 = getpgrp(0);
1187	pg2 = getpgrp();
1188	pg3 = getpgrp(pid);
1189	pg4 = getpgrp(1);
1190
1191	/*
1192	* If all of these values are the same, it's pretty sure that
1193	* we're on a system that ignores getpgrp's first argument.
1194	*/
1195	if (pg2 == pg4 && pg1 == pg3 && pg2 == pg3)
1196	exit(0);
1197
1198	child = fork();
1199	if (child < 0)
1200	exit(1);
1201	else if (child == 0) {
1202	np = getpid();
1203	/*
1204	* If this is Sys V, this will not work; pgrp will be
1205	* set to np because setpgrp just changes a pgrp to be
1206	* the same as the pid.
1207	*/
1208	setpgrp(np, pg1);
1209	ng = getpgrp(0); /* Same result for Sys V and BSD */
1210	if (ng == pg1) {
1211	exit(1);
1212	} else {
1213	exit(0);
1214	}
1215	} else {
1216	wait(&s);
1217	exit(s>>8);
1218	}
1219	}
1220	], ac_cv_func_getpgrp_void=yes, ac_cv_func_getpgrp_void=no,
1221	AC_MSG_ERROR(cannot check getpgrp if cross compiling))
1222	])
1223	if test $ac_cv_func_getpgrp_void = yes; then
1224	AC_DEFINE(GETPGRP_VOID)
1225	fi
1226	])
1227
1228	AC_DEFUN(AC_FUNC_SETPGRP,
1229	[AC_CACHE_CHECK(whether setpgrp takes no argument, ac_cv_func_setpgrp_void,
1230	AC_TRY_RUN([
1231	#ifdef HAVE_UNISTD_H
1232	#include <unistd.h>
1233	#endif
1234
1235	/*
1236	* If this system has a BSD-style setpgrp, which takes arguments, exit
1237	* successfully.
1238	*/
1239	main()
1240	{
1241	if (setpgrp(1,1) == -1)
1242	exit(0);
1243	else
1244	exit(1);
1245	}
1246	], ac_cv_func_setpgrp_void=no, ac_cv_func_setpgrp_void=yes,
1247	AC_MSG_ERROR(cannot check setpgrp if cross compiling))
1248	)
1249	if test $ac_cv_func_setpgrp_void = yes; then
1250	AC_DEFINE(SETPGRP_VOID)
1251	fi
1252	])
1253
1254	AC_DEFUN(AC_FUNC_VPRINTF,
1255	[AC_CHECK_FUNC(vprintf, AC_DEFINE(HAVE_VPRINTF))
1256	if test "$ac_cv_func_vprintf" != yes; then
1257	AC_CHECK_FUNC(_doprnt, AC_DEFINE(HAVE_DOPRNT))
1258	fi
1259	])
1260
1261	AC_DEFUN(AC_FUNC_VFORK,
1262	[AC_REQUIRE([AC_TYPE_PID_T])dnl
1263	AC_CHECK_HEADER(vfork.h, AC_DEFINE(HAVE_VFORK_H))
1264	AC_CACHE_CHECK(for working vfork, ac_cv_func_vfork_works,
1265	[AC_TRY_RUN([/* Thanks to Paul Eggert for this test. */
1266	#include <stdio.h>
1267	#include <sys/types.h>
1268	#include <sys/stat.h>
1269	#ifdef HAVE_UNISTD_H
1270	#include <unistd.h>
1271	#endif
1272	#ifdef HAVE_VFORK_H
1273	#include <vfork.h>
1274	#endif
1275	/* On some sparc systems, changes by the child to local and incoming
1276	argument registers are propagated back to the parent.
1277	The compiler is told about this with #include <vfork.h>,
1278	but some compilers (e.g. gcc -O) don't grok <vfork.h>.
1279	Test for this by using a static variable whose address
1280	is put into a register that is clobbered by the vfork. */
1281	static
1282	#ifdef __cplusplus
1283	sparc_address_test (int arg)
1284	#else
1285	sparc_address_test (arg) int arg;
1286	#endif
1287	{
1288	static pid_t child;
1289	if (!child) {
1290	child = vfork ();
1291	if (child < 0) {
1292	perror ("vfork");
1293	_exit(2);
1294	}
1295	if (!child) {
1296	arg = getpid();
1297	write(-1, "", 0);
1298	_exit (arg);
1299	}
1300	}
1301	}
1302	main() {
1303	pid_t parent = getpid ();
1304	pid_t child;
1305
1306	sparc_address_test ();
1307
1308	child = vfork ();
1309
1310	if (child == 0) {
1311	/* Here is another test for sparc vfork register problems.
1312	This test uses lots of local variables, at least
1313	as many local variables as main has allocated so far
1314	including compiler temporaries. 4 locals are enough for
1315	gcc 1.40.3 on a Solaris 4.1.3 sparc, but we use 8 to be safe.
1316	A buggy compiler should reuse the register of parent
1317	for one of the local variables, since it will think that
1318	parent can't possibly be used any more in this routine.
1319	Assigning to the local variable will thus munge parent
1320	in the parent process. */
1321	pid_t
1322	p = getpid(), p1 = getpid(), p2 = getpid(), p3 = getpid(),
1323	p4 = getpid(), p5 = getpid(), p6 = getpid(), p7 = getpid();
1324	/* Convince the compiler that p..p7 are live; otherwise, it might
1325	use the same hardware register for all 8 local variables. */
1326	if (p != p1 \|\| p != p2 \|\| p != p3 \|\| p != p4
1327	\|\| p != p5 \|\| p != p6 \|\| p != p7)
1328	_exit(1);
1329
1330	/* On some systems (e.g. IRIX 3.3),
1331	vfork doesn't separate parent from child file descriptors.
1332	If the child closes a descriptor before it execs or exits,
1333	this munges the parent's descriptor as well.
1334	Test for this by closing stdout in the child. */
1335	_exit(close(fileno(stdout)) != 0);
1336	} else {
1337	int status;
1338	struct stat st;
1339
1340	while (wait(&status) != child)
1341	;
1342	exit(
1343	/* Was there some problem with vforking? */
1344	child < 0
1345
1346	/* Did the child fail? (This shouldn't happen.) */
1347	\|\| status
1348
1349	/* Did the vfork/compiler bug occur? */
1350	\|\| parent != getpid()
1351
1352	/* Did the file descriptor bug occur? */
1353	\|\| fstat(fileno(stdout), &st) != 0
1354	);
1355	}
1356	}],
1357	ac_cv_func_vfork_works=yes, ac_cv_func_vfork_works=no, AC_CHECK_FUNC(vfork)
1358	ac_cv_func_vfork_works=$ac_cv_func_vfork)])
1359	if test $ac_cv_func_vfork_works = no; then
1360	AC_DEFINE(vfork, fork)
1361	fi
1362	])
1363
1364	AC_DEFUN(AC_FUNC_WAIT3,
1365	[AC_CACHE_CHECK(for wait3 that fills in rusage, ac_cv_func_wait3_rusage,
1366	[AC_TRY_RUN([#include <sys/types.h>
1367	#include <sys/time.h>
1368	#include <sys/resource.h>
1369	#include <stdio.h>
1370	/* HP-UX has wait3 but does not fill in rusage at all. */
1371	main() {
1372	struct rusage r;
1373	int i;
1374	/* Use a field that we can force nonzero --
1375	voluntary context switches.
1376	For systems like NeXT and OSF/1 that don't set it,
1377	also use the system CPU time. And page faults (I/O) for Linux. */
1378	r.ru_nvcsw = 0;
1379	r.ru_stime.tv_sec = 0;
1380	r.ru_stime.tv_usec = 0;
1381	r.ru_majflt = r.ru_minflt = 0;
1382	switch (fork()) {
1383	case 0: /* Child. */
1384	sleep(1); /* Give up the CPU. */
1385	_exit(0);
1386	case -1: _exit(0); /* What can we do? */
1387	default: /* Parent. */
1388	wait3(&i, 0, &r);
1389	sleep(2); /* Avoid "text file busy" from rm on fast HP-UX machines. */
1390	exit(r.ru_nvcsw == 0 && r.ru_majflt == 0 && r.ru_minflt == 0
1391	&& r.ru_stime.tv_sec == 0 && r.ru_stime.tv_usec == 0);
1392	}
1393	}], ac_cv_func_wait3_rusage=yes, ac_cv_func_wait3_rusage=no,
1394	ac_cv_func_wait3_rusage=no)])
1395	if test $ac_cv_func_wait3_rusage = yes; then
1396	AC_DEFINE(HAVE_WAIT3)
1397	fi
1398	])
1399
1400	AC_DEFUN(AC_FUNC_ALLOCA,
1401	[AC_REQUIRE_CPP()dnl Set CPP; we run AC_EGREP_CPP conditionally.
1402	# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
1403	# for constant arguments. Useless!
1404	AC_CACHE_CHECK([for working alloca.h], ac_cv_header_alloca_h,
1405	[AC_TRY_LINK([#include <alloca.h>], [char p = alloca(2 sizeof(int));],
1406	ac_cv_header_alloca_h=yes, ac_cv_header_alloca_h=no)])
1407	if test $ac_cv_header_alloca_h = yes; then
1408	AC_DEFINE(HAVE_ALLOCA_H)
1409	fi
1410
1411	AC_CACHE_CHECK([for alloca], ac_cv_func_alloca_works,
1412	[AC_TRY_LINK([
1413	#ifdef __GNUC__
1414	# define alloca __builtin_alloca
1415	#else
1416	# ifdef _MSC_VER
1417	# include <malloc.h>
1418	# define alloca _alloca
1419	# else
1420	# if HAVE_ALLOCA_H
1421	# include <alloca.h>
1422	# else
1423	# ifdef _AIX
1424	#pragma alloca
1425	# else
1426	# ifndef alloca /* predefined by HP cc +Olibcalls */
1427	char *alloca ();
1428	# endif
1429	# endif
1430	# endif
1431	# endif
1432	#endif
1433	], [char p = (char ) alloca(1);],
1434	ac_cv_func_alloca_works=yes, ac_cv_func_alloca_works=no)])
1435	if test $ac_cv_func_alloca_works = yes; then
1436	AC_DEFINE(HAVE_ALLOCA)
1437	fi
1438
1439	if test $ac_cv_func_alloca_works = no; then
1440	# The SVR3 libPW and SVR4 libucb both contain incompatible functions
1441	# that cause trouble. Some versions do not even contain alloca or
1442	# contain a buggy version. If you still want to use their alloca,
1443	# use ar to extract alloca.o from them instead of compiling alloca.c.
1444	ALLOCA=alloca.${ac_objext}
1445	AC_DEFINE(C_ALLOCA)
1446
1447	AC_CACHE_CHECK(whether alloca needs Cray hooks, ac_cv_os_cray,
1448	[AC_EGREP_CPP(webecray,
1449	[#if defined(CRAY) && ! defined(CRAY2)
1450	webecray
1451	#else
1452	wenotbecray
1453	#endif
1454	], ac_cv_os_cray=yes, ac_cv_os_cray=no)])
1455	if test $ac_cv_os_cray = yes; then
1456	for ac_func in _getb67 GETB67 getb67; do
1457	AC_CHECK_FUNC($ac_func, [AC_DEFINE_UNQUOTED(CRAY_STACKSEG_END, $ac_func)
1458	break])
1459	done
1460	fi
1461
1462	AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
1463	[AC_TRY_RUN([find_stack_direction ()
1464	{
1465	static char *addr = 0;
1466	auto char dummy;
1467	if (addr == 0)
1468	{
1469	addr = &dummy;
1470	return find_stack_direction ();
1471	}
1472	else
1473	return (&dummy > addr) ? 1 : -1;
1474	}
1475	main ()
1476	{
1477	exit (find_stack_direction() < 0);
1478	}], ac_cv_c_stack_direction=1, ac_cv_c_stack_direction=-1,
1479	ac_cv_c_stack_direction=0)])
1480	AC_DEFINE_UNQUOTED(STACK_DIRECTION, $ac_cv_c_stack_direction)
1481	fi
1482	AC_SUBST(ALLOCA)dnl
1483	])
1484
1485	AC_DEFUN(AC_FUNC_GETLOADAVG,
1486	[ac_have_func=no # yes means we've found a way to get the load average.
1487
1488	# Some systems with -lutil have (and need) -lkvm as well, some do not.
1489	# On Solaris, -lkvm requires nlist from -lelf, so check that first
1490	# to get the right answer into the cache.
1491	AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
1492	AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
1493	# Check for the 4.4BSD definition of getloadavg.
1494	AC_CHECK_LIB(util, getloadavg,
1495	[LIBS="-lutil $LIBS" ac_have_func=yes ac_cv_func_getloadavg_setgid=yes])
1496
1497	if test $ac_have_func = no; then
1498	# There is a commonly available library for RS/6000 AIX.
1499	# Since it is not a standard part of AIX, it might be installed locally.
1500	ac_getloadavg_LIBS="$LIBS"; LIBS="-L/usr/local/lib $LIBS"
1501	AC_CHECK_LIB(getloadavg, getloadavg,
1502	LIBS="-lgetloadavg $LIBS", LIBS="$ac_getloadavg_LIBS")
1503	fi
1504
1505	# Make sure it is really in the library, if we think we found it.
1506	AC_REPLACE_FUNCS(getloadavg)
1507
1508	if test $ac_cv_func_getloadavg = yes; then
1509	AC_DEFINE(HAVE_GETLOADAVG)
1510	ac_have_func=yes
1511	else
1512	# Figure out what our getloadavg.c needs.
1513	ac_have_func=no
1514	AC_CHECK_HEADER(sys/dg_sys_info.h,
1515	[ac_have_func=yes; AC_DEFINE(DGUX)
1516	AC_CHECK_LIB(dgc, dg_sys_info)])
1517
1518	# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
1519	# uses stabs), but it is still SVR4. We cannot check for <elf.h> because
1520	# Irix 4.0.5F has the header but not the library.
1521	if test $ac_have_func = no && test $ac_cv_lib_elf_elf_begin = yes; then
1522	ac_have_func=yes; AC_DEFINE(SVR4)
1523	fi
1524
1525	if test $ac_have_func = no; then
1526	AC_CHECK_HEADER(inq_stats/cpustats.h,
1527	[ac_have_func=yes; AC_DEFINE(UMAX)
1528	AC_DEFINE(UMAX4_3)])
1529	fi
1530
1531	if test $ac_have_func = no; then
1532	AC_CHECK_HEADER(sys/cpustats.h,
1533	[ac_have_func=yes; AC_DEFINE(UMAX)])
1534	fi
1535
1536	if test $ac_have_func = no; then
1537	AC_CHECK_HEADERS(mach/mach.h)
1538	fi
1539
1540	AC_CHECK_HEADER(nlist.h,
1541	[AC_DEFINE(NLIST_STRUCT)
1542	AC_CACHE_CHECK([for n_un in struct nlist], ac_cv_struct_nlist_n_un,
1543	[AC_TRY_COMPILE([#include <nlist.h>],
1544	[struct nlist n; n.n_un.n_name = 0;],
1545	ac_cv_struct_nlist_n_un=yes, ac_cv_struct_nlist_n_un=no)])
1546	if test $ac_cv_struct_nlist_n_un = yes; then
1547	AC_DEFINE(NLIST_NAME_UNION)
1548	fi
1549	])dnl
1550	fi # Do not have getloadavg in system libraries.
1551
1552	# Some definitions of getloadavg require that the program be installed setgid.
1553	dnl FIXME Don't hardwire the path of getloadavg.c in the top-level directory.
1554	AC_CACHE_CHECK(whether getloadavg requires setgid,
1555	ac_cv_func_getloadavg_setgid,
1556	[AC_EGREP_CPP([Yowza Am I SETGID yet],
1557	[#include "$srcdir/getloadavg.c"
1558	#ifdef LDAV_PRIVILEGED
1559	Yowza Am I SETGID yet
1560	#endif],
1561	ac_cv_func_getloadavg_setgid=yes, ac_cv_func_getloadavg_setgid=no)])
1562	if test $ac_cv_func_getloadavg_setgid = yes; then
1563	NEED_SETGID=true; AC_DEFINE(GETLOADAVG_PRIVILEGED)
1564	else
1565	NEED_SETGID=false
1566	fi
1567	AC_SUBST(NEED_SETGID)dnl
1568
1569	if test $ac_cv_func_getloadavg_setgid = yes; then
1570	AC_CACHE_CHECK(group of /dev/kmem, ac_cv_group_kmem,
1571	[changequote(, )dnl
1572	# On Solaris, /dev/kmem is a symlink. Get info on the real file.
1573	ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
1574	# If we got an error (system does not support symlinks), try without -L.
1575	test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
1576	ac_cv_group_kmem=`echo $ac_ls_output \
1577	\| sed -ne 's/[ ][ ]*/ /g;
1578	s/^.[sSrwx-]* [0-9] $[^0-9]$ ./\1/;
1579	/ /s/.* //;p;'`
1580	changequote([, ])dnl
1581	])
1582	KMEM_GROUP=$ac_cv_group_kmem
1583	fi
1584	AC_SUBST(KMEM_GROUP)dnl
1585	])
1586
1587	AC_DEFUN(AC_FUNC_UTIME_NULL,
1588	[AC_CACHE_CHECK(whether utime accepts a null argument, ac_cv_func_utime_null,
1589	[rm -f conftestdata; > conftestdata
1590	# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
1591	AC_TRY_RUN([#include <sys/types.h>
1592	#include <sys/stat.h>
1593	main() {
1594	struct stat s, t;
1595	exit(!(stat ("conftestdata", &s) == 0 && utime("conftestdata", (long *)0) == 0
1596	&& stat("conftestdata", &t) == 0 && t.st_mtime >= s.st_mtime
1597	&& t.st_mtime - s.st_mtime < 120));
1598	}], ac_cv_func_utime_null=yes, ac_cv_func_utime_null=no,
1599	ac_cv_func_utime_null=no)
1600	rm -f core core.* *.core])
1601	if test $ac_cv_func_utime_null = yes; then
1602	AC_DEFINE(HAVE_UTIME_NULL)
1603	fi
1604	])
1605
1606	AC_DEFUN(AC_FUNC_STRCOLL,
1607	[AC_CACHE_CHECK(for working strcoll, ac_cv_func_strcoll_works,
1608	[AC_TRY_RUN([#include <string.h>
1609	main ()
1610	{
1611	exit (strcoll ("abc", "def") >= 0 \|\|
1612	strcoll ("ABC", "DEF") >= 0 \|\|
1613	strcoll ("123", "456") >= 0);
1614	}], ac_cv_func_strcoll_works=yes, ac_cv_func_strcoll_works=no,
1615	ac_cv_func_strcoll_works=no)])
1616	if test $ac_cv_func_strcoll_works = yes; then
1617	AC_DEFINE(HAVE_STRCOLL)
1618	fi
1619	])
1620
1621	AC_DEFUN(AC_FUNC_SETVBUF_REVERSED,
1622	[AC_CACHE_CHECK(whether setvbuf arguments are reversed,
1623	ac_cv_func_setvbuf_reversed,
1624	[AC_TRY_RUN([#include <stdio.h>
1625	/* If setvbuf has the reversed format, exit 0. */
1626	main () {
1627	/* This call has the arguments reversed.
1628	A reversed system may check and see that the address of main
1629	is not _IOLBF, _IONBF, or _IOFBF, and return nonzero. */
1630	if (setvbuf(stdout, _IOLBF, (char *) main, BUFSIZ) != 0)
1631	exit(1);
1632	putc('\r', stdout);
1633	exit(0); /* Non-reversed systems segv here. */
1634	}], ac_cv_func_setvbuf_reversed=yes, ac_cv_func_setvbuf_reversed=no)
1635	rm -f core core.* *.core])
1636	if test $ac_cv_func_setvbuf_reversed = yes; then
1637	AC_DEFINE(SETVBUF_REVERSED)
1638	fi
1639	])
1640
1641	AC_DEFUN(AC_FUNC_GETMNTENT,
1642	[# getmntent is in -lsun on Irix 4, -lseq on Dynix/PTX, -lgen on Unixware.
1643	AC_CHECK_LIB(sun, getmntent, LIBS="-lsun $LIBS",
1644	[AC_CHECK_LIB(seq, getmntent, LIBS="-lseq $LIBS",
1645	[AC_CHECK_LIB(gen, getmntent, LIBS="-lgen $LIBS")])])
1646	AC_CHECK_FUNC(getmntent, [AC_DEFINE(HAVE_GETMNTENT)])])
1647
1648	AC_DEFUN(AC_FUNC_STRFTIME,
1649	[AC_CHECK_FUNC(strftime, [AC_DEFINE(HAVE_STRFTIME)],
1650	[# strftime is in -lintl on SCO UNIX.
1651	AC_CHECK_LIB(intl, strftime,
1652	[AC_DEFINE(HAVE_STRFTIME)
1653	LIBS="-lintl $LIBS"])])])
1654
1655	AC_DEFUN(AC_FUNC_MEMCMP,
1656	[AC_CACHE_CHECK(for 8-bit clean memcmp, ac_cv_func_memcmp_clean,
1657	[AC_TRY_RUN([
1658	main()
1659	{
1660	char c0 = 0x40, c1 = 0x80, c2 = 0x81;
1661	exit(memcmp(&c0, &c2, 1) < 0 && memcmp(&c1, &c2, 1) < 0 ? 0 : 1);
1662	}
1663	], ac_cv_func_memcmp_clean=yes, ac_cv_func_memcmp_clean=no,
1664	ac_cv_func_memcmp_clean=no)])
1665	test $ac_cv_func_memcmp_clean = no && LIBOBJS="$LIBOBJS memcmp.${ac_objext}"
1666	AC_SUBST(LIBOBJS)dnl
1667	])
1668
1669	AC_DEFUN(AC_FUNC_SELECT_ARGTYPES,
1670	[AC_MSG_CHECKING([types of arguments for select()])
1671	AC_CACHE_VAL(ac_cv_func_select_arg234,dnl
1672	[AC_CACHE_VAL(ac_cv_func_select_arg1,dnl
1673	[AC_CACHE_VAL(ac_cv_func_select_arg5,dnl
1674	[for ac_cv_func_select_arg234 in 'fd_set ' 'int ' 'void *'; do
1675	for ac_cv_func_select_arg1 in 'int' 'size_t' 'unsigned long' 'unsigned'; do
1676	for ac_cv_func_select_arg5 in 'struct timeval ' 'const struct timeval '; do
1677	AC_TRY_COMPILE(dnl
1678	[#ifdef HAVE_SYS_TYPES_H
1679	#include <sys/types.h>
1680	#endif
1681	#ifdef HAVE_SYS_TIME_H
1682	#include <sys/time.h>
1683	#endif
1684	#ifdef HAVE_SYS_SELECT_H
1685	#include <sys/select.h>
1686	#endif
1687	#ifdef HAVE_SYS_SOCKET_H
1688	#include <sys/socket.h>
1689	#endif
1690	extern select ($ac_cv_func_select_arg1,$ac_cv_func_select_arg234,$ac_cv_func_select_arg234,$ac_cv_func_select_arg234,$ac_cv_func_select_arg5);],,dnl
1691	[ac_not_found=no ; break 3],ac_not_found=yes)
1692	done
1693	done
1694	done
1695	])dnl AC_CACHE_VAL
1696	])dnl AC_CACHE_VAL
1697	])dnl AC_CACHE_VAL
1698	if test "$ac_not_found" = yes; then
1699	ac_cv_func_select_arg1=int
1700	ac_cv_func_select_arg234='int *'
1701	ac_cv_func_select_arg5='struct timeval *'
1702	fi
1703	AC_MSG_RESULT([$ac_cv_func_select_arg1,$ac_cv_func_select_arg234,$ac_cv_func_select_arg5])
1704	AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG1,$ac_cv_func_select_arg1)
1705	AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG234,($ac_cv_func_select_arg234))
1706	AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG5,($ac_cv_func_select_arg5))
1707	])
1708
1709
1710	dnl ### Checks for structure members
1711
1712
1713	AC_DEFUN(AC_HEADER_TIME,
1714	[AC_CACHE_CHECK([whether time.h and sys/time.h may both be included],
1715	ac_cv_header_time,
1716	[AC_TRY_COMPILE([#include <sys/types.h>
1717	#include <sys/time.h>
1718	#include <time.h>],
1719	[struct tm *tp;], ac_cv_header_time=yes, ac_cv_header_time=no)])
1720	if test $ac_cv_header_time = yes; then
1721	AC_DEFINE(TIME_WITH_SYS_TIME)
1722	fi
1723	])
1724
1725	AC_DEFUN(AC_STRUCT_TM,
1726	[AC_CACHE_CHECK([whether struct tm is in sys/time.h or time.h],
1727	ac_cv_struct_tm,
1728	[AC_TRY_COMPILE([#include <sys/types.h>
1729	#include <time.h>],
1730	[struct tm *tp; tp->tm_sec;],
1731	ac_cv_struct_tm=time.h, ac_cv_struct_tm=sys/time.h)])
1732	if test $ac_cv_struct_tm = sys/time.h; then
1733	AC_DEFINE(TM_IN_SYS_TIME)
1734	fi
1735	])
1736
1737	AC_DEFUN(AC_STRUCT_TIMEZONE,
1738	[AC_REQUIRE([AC_STRUCT_TM])dnl
1739	AC_CACHE_CHECK([for tm_zone in struct tm], ac_cv_struct_tm_zone,
1740	[AC_TRY_COMPILE([#include <sys/types.h>
1741	#include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_zone;],
1742	ac_cv_struct_tm_zone=yes, ac_cv_struct_tm_zone=no)])
1743	if test "$ac_cv_struct_tm_zone" = yes; then
1744	AC_DEFINE(HAVE_TM_ZONE)
1745	else
1746	AC_CACHE_CHECK(for tzname, ac_cv_var_tzname,
1747	[AC_TRY_LINK(
1748	changequote(<<, >>)dnl
1749	<<#include <time.h>
1750	#ifndef tzname /* For SGI. */
1751	extern char tzname[]; / RS6000 and others reject char *tzname. /
1752	#endif>>,
1753	changequote([, ])dnl
1754	[atoi(*tzname);], ac_cv_var_tzname=yes, ac_cv_var_tzname=no)])
1755	if test $ac_cv_var_tzname = yes; then
1756	AC_DEFINE(HAVE_TZNAME)
1757	fi
1758	fi
1759	])
1760
1761	AC_DEFUN(AC_STRUCT_ST_BLOCKS,
1762	[AC_CACHE_CHECK([for st_blocks in struct stat], ac_cv_struct_st_blocks,
1763	[AC_TRY_COMPILE([#include <sys/types.h>
1764	#include <sys/stat.h>], [struct stat s; s.st_blocks;],
1765	ac_cv_struct_st_blocks=yes, ac_cv_struct_st_blocks=no)])
1766	if test $ac_cv_struct_st_blocks = yes; then
1767	AC_DEFINE(HAVE_ST_BLOCKS)
1768	else
1769	LIBOBJS="$LIBOBJS fileblocks.${ac_objext}"
1770	fi
1771	AC_SUBST(LIBOBJS)dnl
1772	])
1773
1774	AC_DEFUN(AC_STRUCT_ST_BLKSIZE,
1775	[AC_CACHE_CHECK([for st_blksize in struct stat], ac_cv_struct_st_blksize,
1776	[AC_TRY_COMPILE([#include <sys/types.h>
1777	#include <sys/stat.h>], [struct stat s; s.st_blksize;],
1778	ac_cv_struct_st_blksize=yes, ac_cv_struct_st_blksize=no)])
1779	if test $ac_cv_struct_st_blksize = yes; then
1780	AC_DEFINE(HAVE_ST_BLKSIZE)
1781	fi
1782	])
1783
1784	AC_DEFUN(AC_STRUCT_ST_RDEV,
1785	[AC_CACHE_CHECK([for st_rdev in struct stat], ac_cv_struct_st_rdev,
1786	[AC_TRY_COMPILE([#include <sys/types.h>
1787	#include <sys/stat.h>], [struct stat s; s.st_rdev;],
1788	ac_cv_struct_st_rdev=yes, ac_cv_struct_st_rdev=no)])
1789	if test $ac_cv_struct_st_rdev = yes; then
1790	AC_DEFINE(HAVE_ST_RDEV)
1791	fi
1792	])
1793
1794
1795	dnl ### Checks for compiler characteristics
1796
1797
1798	AC_DEFUN(AC_C_CROSS,
1799	[AC_OBSOLETE([$0], [; it has been merged into AC_PROG_CC])])
1800
1801	AC_DEFUN(AC_C_CHAR_UNSIGNED,
1802	[AC_CACHE_CHECK(whether char is unsigned, ac_cv_c_char_unsigned,
1803	[if test "$GCC" = yes; then
1804	# GCC predefines this symbol on systems where it applies.
1805	AC_EGREP_CPP(yes,
1806	[#ifdef __CHAR_UNSIGNED__
1807	yes
1808	#endif
1809	], ac_cv_c_char_unsigned=yes, ac_cv_c_char_unsigned=no)
1810	else
1811	AC_TRY_RUN(
1812	[/* volatile prevents gcc2 from optimizing the test away on sparcs. */
1813	#if !defined(__STDC__) \|\| __STDC__ != 1
1814	#define volatile
1815	#endif
1816	main() {
1817	volatile char c = 255; exit(c < 0);
1818	}], ac_cv_c_char_unsigned=yes, ac_cv_c_char_unsigned=no)
1819	fi])
1820	if test $ac_cv_c_char_unsigned = yes && test "$GCC" != yes; then
1821	AC_DEFINE(__CHAR_UNSIGNED__)
1822	fi
1823	])
1824
1825	AC_DEFUN(AC_C_LONG_DOUBLE,
1826	[AC_CACHE_CHECK(for long double, ac_cv_c_long_double,
1827	[if test "$GCC" = yes; then
1828	ac_cv_c_long_double=yes
1829	else
1830	AC_TRY_RUN([int main() {
1831	/* The Stardent Vistra knows sizeof(long double), but does not support it. */
1832	long double foo = 0.0;
1833	/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
1834	exit(sizeof(long double) < sizeof(double)); }],
1835	ac_cv_c_long_double=yes, ac_cv_c_long_double=no)
1836	fi])
1837	if test $ac_cv_c_long_double = yes; then
1838	AC_DEFINE(HAVE_LONG_DOUBLE)
1839	fi
1840	])
1841
1842	AC_DEFUN(AC_INT_16_BITS,
1843	[AC_OBSOLETE([$0], [; instead use AC_CHECK_SIZEOF(int)])dnl
1844	AC_MSG_CHECKING(whether int is 16 bits)
1845	AC_TRY_RUN([main() { exit(sizeof(int) != 2); }],
1846	[AC_MSG_RESULT(yes)
1847	AC_DEFINE(INT_16_BITS)], AC_MSG_RESULT(no))
1848	])
1849
1850	AC_DEFUN(AC_LONG_64_BITS,
1851	[AC_OBSOLETE([$0], [; instead use AC_CHECK_SIZEOF(long)])dnl
1852	AC_MSG_CHECKING(whether long int is 64 bits)
1853	AC_TRY_RUN([main() { exit(sizeof(long int) != 8); }],
1854	[AC_MSG_RESULT(yes)
1855	AC_DEFINE(LONG_64_BITS)], AC_MSG_RESULT(no))
1856	])
1857
1858	AC_DEFUN(AC_C_BIGENDIAN,
1859	[AC_CACHE_CHECK(whether byte ordering is bigendian, ac_cv_c_bigendian,
1860	[ac_cv_c_bigendian=unknown
1861	# See if sys/param.h defines the BYTE_ORDER macro.
1862	AC_TRY_COMPILE([#include <sys/types.h>
1863	#include <sys/param.h>], [
1864	#if !BYTE_ORDER \|\| !BIG_ENDIAN \|\| !LITTLE_ENDIAN
1865	bogus endian macros
1866	#endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
1867	AC_TRY_COMPILE([#include <sys/types.h>
1868	#include <sys/param.h>], [
1869	#if BYTE_ORDER != BIG_ENDIAN
1870	not big endian
1871	#endif], ac_cv_c_bigendian=yes, ac_cv_c_bigendian=no)])
1872	if test $ac_cv_c_bigendian = unknown; then
1873	AC_TRY_RUN([main () {
1874	/* Are we little or big endian? From Harbison&Steele. */
1875	union
1876	{
1877	long l;
1878	char c[sizeof (long)];
1879	} u;
1880	u.l = 1;
1881	exit (u.c[sizeof (long) - 1] == 1);
1882	}], ac_cv_c_bigendian=no, ac_cv_c_bigendian=yes)
1883	fi])
1884	if test $ac_cv_c_bigendian = yes; then
1885	AC_DEFINE(WORDS_BIGENDIAN)
1886	fi
1887	])
1888
1889	dnl Do nothing if the compiler accepts the inline keyword.
1890	dnl Otherwise define inline to __inline__ or __inline if one of those work,
1891	dnl otherwise define inline to be empty.
1892	AC_DEFUN(AC_C_INLINE,
1893	[AC_CACHE_CHECK([for inline], ac_cv_c_inline,
1894	[ac_cv_c_inline=no
1895	for ac_kw in inline __inline__ __inline; do
1896	AC_TRY_COMPILE(, [} $ac_kw foo() {], [ac_cv_c_inline=$ac_kw; break])
1897	done
1898	])
1899	case "$ac_cv_c_inline" in
1900	inline \| yes) ;;
1901	no) AC_DEFINE(inline, ) ;;
1902	*) AC_DEFINE_UNQUOTED(inline, $ac_cv_c_inline) ;;
1903	esac
1904	])
1905
1906	AC_DEFUN(AC_C_CONST,
1907	[dnl This message is consistent in form with the other checking messages,
1908	dnl and with the result message.
1909	AC_CACHE_CHECK([for working const], ac_cv_c_const,
1910	[AC_TRY_COMPILE(,
1911	changequote(<<, >>)dnl
1912	<<
1913	/* Ultrix mips cc rejects this. */
1914	typedef int charset[2]; const charset x;
1915	/* SunOS 4.1.1 cc rejects this. */
1916	char const const ccp;
1917	char **p;
1918	/* NEC SVR4.0.2 mips cc rejects this. */
1919	struct point {int x, y;};
1920	static struct point const zero = {0,0};
1921	/* AIX XL C 1.02.0.0 rejects this.
1922	It does not let you subtract one const X* pointer from another in an arm
1923	of an if-expression whose if-part is not a constant expression */
1924	const char *g = "string";
1925	ccp = &g + (g ? g-g : 0);
1926	/* HPUX 7.0 cc rejects these. */
1927	++ccp;
1928	p = (char**) ccp;
1929	ccp = (char const const ) p;
1930	{ /* SCO 3.2v4 cc rejects this. */
1931	char *t;
1932	char const s = 0 ? (char ) 0 : (char const *) 0;
1933
1934	*t++ = 0;
1935	}
1936	{ /* Someone thinks the Sun supposedly-ANSI compiler will reject this. */
1937	int x[] = {25, 17};
1938	const int *foo = &x[0];
1939	++foo;
1940	}
1941	{ /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
1942	typedef const int *iptr;
1943	iptr p = 0;
1944	++p;
1945	}
1946	{ /* AIX XL C 1.02.0.0 rejects this saying
1947	"k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
1948	struct s { int j; const int *ap[3]; };
1949	struct s *b; b->j = 5;
1950	}
1951	{ /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
1952	const int foo = 10;
1953	}
1954	>>,
1955	changequote([, ])dnl
1956	ac_cv_c_const=yes, ac_cv_c_const=no)])
1957	if test $ac_cv_c_const = no; then
1958	AC_DEFINE(const, )
1959	fi
1960	])
1961
1962	AC_DEFUN(AC_C_STRINGIZE, [
1963	AC_REQUIRE([AC_PROG_CPP])
1964	AC_MSG_CHECKING([for preprocessor stringizing operator])
1965	AC_CACHE_VAL(ac_cv_c_stringize,
1966	AC_EGREP_CPP([#teststring],[
1967	#define x(y) #y
1968
1969	char *s = x(teststring);
1970	], ac_cv_c_stringize=no, ac_cv_c_stringize=yes))
1971	if test "${ac_cv_c_stringize}" = yes
1972	then
1973	AC_DEFINE(HAVE_STRINGIZE)
1974	fi
1975	AC_MSG_RESULT([${ac_cv_c_stringize}])
1976	])dnl
1977
1978	define(AC_ARG_ARRAY,
1979	[errprint(__file__:__line__: [$0] has been removed; don't do unportable things with arguments
1980	)m4exit(4)])
1981
1982	dnl Check the object extension used by the compiler: typically .o or
1983	dnl .obj. If this is called, some other behaviour will change,
1984	dnl determined by ac_objext.
1985	AC_DEFUN(AC_OBJEXT,
1986	[AC_MSG_CHECKING([for object suffix])
1987	AC_CACHE_VAL(ac_cv_objext,
1988	[rm -f conftest*
1989	echo 'int i = 1;' > conftest.$ac_ext
1990	if AC_TRY_EVAL(ac_compile); then
1991	for ac_file in conftest.*; do
1992	case $ac_file in
1993	*.c) ;;
1994	*) ac_cv_objext=`echo $ac_file \| sed -e s/conftest.//` ;;
1995	esac
1996	done
1997	else
1998	AC_MSG_ERROR([installation or configuration problem; compiler does not work])
1999	fi
2000	rm -f conftest*])
2001	AC_MSG_RESULT($ac_cv_objext)
2002	OBJEXT=$ac_cv_objext
2003	ac_objext=$ac_cv_objext
2004	AC_SUBST(OBJEXT)])
2005
2006	dnl Determine the linker flags (e.g. `-L' and `-l') for the Fortran 77
2007	dnl intrinsic and run-time libraries that are required to successfully
2008	dnl link a Fortran 77 program or shared library. The output variable
2009	dnl FLIBS is set to these flags.
2010	dnl
2011	dnl This macro is intended to be used in those situations when it is
2012	dnl necessary to mix, e.g. C++ and Fortran 77, source code into a single
2013	dnl program or shared library.
2014	dnl
2015	dnl For example, if object files from a C++ and Fortran 77 compiler must
2016	dnl be linked together, then the C++ compiler/linker must be used for
2017	dnl linking (since special C++-ish things need to happen at link time
2018	dnl like calling global constructors, instantiating templates, enabling
2019	dnl exception support, etc.).
2020	dnl
2021	dnl However, the Fortran 77 intrinsic and run-time libraries must be
2022	dnl linked in as well, but the C++ compiler/linker doesn't know how to
2023	dnl add these Fortran 77 libraries. Hence, the macro
2024	dnl `AC_F77_LIBRARY_LDFLAGS' was created to determine these Fortran 77
2025	dnl libraries.
2026	dnl
2027	dnl This macro was packaged in its current form by Matthew D. Langston
2028	dnl <langston@SLAC.Stanford.EDU>. However, nearly all of this macro
2029	dnl came from the `OCTAVE_FLIBS' macro in `octave-2.0.13/aclocal.m4',
2030	dnl and full credit should go to John W. Eaton for writing this
2031	dnl extremely useful macro. Thank you John.
2032	dnl
2033	dnl AC_F77_LIBRARY_LDFLAGS()
2034	AC_DEFUN(AC_F77_LIBRARY_LDFLAGS,
2035	[AC_MSG_CHECKING([for Fortran 77 libraries])
2036	AC_REQUIRE([AC_PROG_F77])
2037	AC_REQUIRE([AC_CANONICAL_HOST])
2038	AC_CACHE_VAL(ac_cv_flibs,
2039	[changequote(, )dnl
2040	dnl Write a minimal program and compile it with -v. I don't know what
2041	dnl to do if your compiler doesn't have -v...
2042	echo " END" > conftest.f
2043	foutput=`${F77} -v -o conftest conftest.f 2>&1`
2044	dnl
2045	dnl The easiest thing to do for xlf output is to replace all the commas
2046	dnl with spaces. Try to only do that if the output is really from xlf,
2047	dnl since doing that causes problems on other systems.
2048	dnl
2049	xlf_p=`echo $foutput \| grep xlfentry`
2050	if test -n "$xlf_p"; then
2051	foutput=`echo $foutput \| sed 's/,/ /g'`
2052	fi
2053	dnl
2054	ld_run_path=`echo $foutput \| \
2055	sed -n -e 's/^.LD_RUN_PATH = $[^ ]$.*/\1/p'`
2056	dnl
2057	dnl We are only supposed to find this on Solaris systems...
2058	dnl Uh, the run path should be absolute, shouldn't it?
2059	dnl
2060	case "$ld_run_path" in
2061	/*)
2062	if test "$ac_cv_prog_gcc" = yes; then
2063	ld_run_path="-Xlinker -R -Xlinker $ld_run_path"
2064	else
2065	ld_run_path="-R $ld_run_path"
2066	fi
2067	;;
2068	*)
2069	ld_run_path=
2070	;;
2071	esac
2072	dnl
2073	flibs=
2074	lflags=
2075	dnl
2076	dnl If want_arg is set, we know we want the arg to be added to the list,
2077	dnl so we don't have to examine it.
2078	dnl
2079	want_arg=
2080	dnl
2081	for arg in $foutput; do
2082	old_want_arg=$want_arg
2083	want_arg=
2084	dnl
2085	dnl None of the options that take arguments expect the argument to
2086	dnl start with a -, so pretend we didn't see anything special.
2087	dnl
2088	if test -n "$old_want_arg"; then
2089	case "$arg" in
2090	-*)
2091	old_want_arg=
2092	;;
2093	esac
2094	fi
2095	case "$old_want_arg" in
2096	'')
2097	case $arg in
2098	/*.a)
2099	exists=false
2100	for f in $lflags; do
2101	if test x$arg = x$f; then
2102	exists=true
2103	fi
2104	done
2105	if $exists; then
2106	arg=
2107	else
2108	lflags="$lflags $arg"
2109	fi
2110	;;
2111	-bI:*)
2112	exists=false
2113	for f in $lflags; do
2114	if test x$arg = x$f; then
2115	exists=true
2116	fi
2117	done
2118	if $exists; then
2119	arg=
2120	else
2121	if test "$ac_cv_prog_gcc" = yes; then
2122	lflags="$lflags -Xlinker $arg"
2123	else
2124	lflags="$lflags $arg"
2125	fi
2126	fi
2127	;;
2128	-lang* \| -lcrt0.o \| -lc \| -lgcc)
2129	arg=
2130	;;
2131	-[lLR])
2132	want_arg=$arg
2133	arg=
2134	;;
2135	-[lLR]*)
2136	exists=false
2137	for f in $lflags; do
2138	if test x$arg = x$f; then
2139	exists=true
2140	fi
2141	done
2142	if $exists; then
2143	arg=
2144	else
2145	case "$arg" in
2146	-lkernel32)
2147	case "$canonical_host_type" in
2148	--cygwin*)
2149	arg=
2150	;;
2151	*)
2152	lflags="$lflags $arg"
2153	;;
2154	esac
2155	;;
2156	-lm)
2157	;;
2158	*)
2159	lflags="$lflags $arg"
2160	;;
2161	esac
2162	fi
2163	;;
2164	-u)
2165	want_arg=$arg
2166	arg=
2167	;;
2168	-Y)
2169	want_arg=$arg
2170	arg=
2171	;;
2172	*)
2173	arg=
2174	;;
2175	esac
2176	;;
2177	-[lLR])
2178	arg="$old_want_arg $arg"
2179	;;
2180	-u)
2181	arg="-u $arg"
2182	;;
2183	-Y)
2184	dnl
2185	dnl Should probably try to ensure unique directory options here too.
2186	dnl This probably only applies to Solaris systems, and then will only
2187	dnl work with gcc...
2188	dnl
2189	arg=`echo $arg \| sed -e 's%^P,%%'`
2190	SAVE_IFS=$IFS
2191	IFS="$PATH_IFS"
2192	list=
2193	for elt in $arg; do
2194	list="$list -L$elt"
2195	done
2196	IFS=$SAVE_IFS
2197	arg="$list"
2198	;;
2199	esac
2200	dnl
2201	if test -n "$arg"; then
2202	flibs="$flibs $arg"
2203	fi
2204	done
2205	if test -n "$ld_run_path"; then
2206	flibs_result="$ld_run_path $flibs"
2207	else
2208	flibs_result="$flibs"
2209	fi
2210	changequote([, ])dnl
2211	ac_cv_flibs="$flibs_result"])
2212	FLIBS="$ac_cv_flibs"
2213	AC_SUBST(FLIBS)dnl
2214	AC_MSG_RESULT($FLIBS)
2215	])
2216
2217
2218	dnl ### Checks for operating system services
2219
2220
2221	AC_DEFUN(AC_SYS_INTERPRETER,
2222	[# Pull the hash mark out of the macro call to avoid m4 problems.
2223	ac_msg="whether #! works in shell scripts"
2224	AC_CACHE_CHECK($ac_msg, ac_cv_sys_interpreter,
2225	[echo '#! /bin/cat
2226	exit 69
2227	' > conftest
2228	chmod u+x conftest
2229	(SHELL=/bin/sh; export SHELL; ./conftest >/dev/null)
2230	if test $? -ne 69; then
2231	ac_cv_sys_interpreter=yes
2232	else
2233	ac_cv_sys_interpreter=no
2234	fi
2235	rm -f conftest])
2236	interpval="$ac_cv_sys_interpreter"
2237	])
2238
2239	define(AC_HAVE_POUNDBANG,
2240	[errprint(__file__:__line__: [$0 has been replaced by AC_SYS_INTERPRETER, taking no arguments
2241	])m4exit(4)])
2242
2243	AC_DEFUN(AC_SYS_LONG_FILE_NAMES,
2244	[AC_CACHE_CHECK(for long file names, ac_cv_sys_long_file_names,
2245	[ac_cv_sys_long_file_names=yes
2246	# Test for long file names in all the places we know might matter:
2247	# . the current directory, where building will happen
2248	# $prefix/lib where we will be installing things
2249	# $exec_prefix/lib likewise
2250	# eval it to expand exec_prefix.
2251	# $TMPDIR if set, where it might want to write temporary files
2252	# if $TMPDIR is not set:
2253	# /tmp where it might want to write temporary files
2254	# /var/tmp likewise
2255	# /usr/tmp likewise
2256	if test -n "$TMPDIR" && test -d "$TMPDIR" && test -w "$TMPDIR"; then
2257	ac_tmpdirs="$TMPDIR"
2258	else
2259	ac_tmpdirs='/tmp /var/tmp /usr/tmp'
2260	fi
2261	for ac_dir in . $ac_tmpdirs `eval echo $prefix/lib $exec_prefix/lib` ; do
2262	test -d $ac_dir \|\| continue
2263	test -w $ac_dir \|\| continue # It is less confusing to not echo anything here.
2264	(echo 1 > $ac_dir/conftest9012345) 2>/dev/null
2265	(echo 2 > $ac_dir/conftest9012346) 2>/dev/null
2266	val=`cat $ac_dir/conftest9012345 2>/dev/null`
2267	if test ! -f $ac_dir/conftest9012345 \|\| test "$val" != 1; then
2268	ac_cv_sys_long_file_names=no
2269	rm -f $ac_dir/conftest9012345 $ac_dir/conftest9012346 2>/dev/null
2270	break
2271	fi
2272	rm -f $ac_dir/conftest9012345 $ac_dir/conftest9012346 2>/dev/null
2273	done])
2274	if test $ac_cv_sys_long_file_names = yes; then
2275	AC_DEFINE(HAVE_LONG_FILE_NAMES)
2276	fi
2277	])
2278
2279	AC_DEFUN(AC_SYS_RESTARTABLE_SYSCALLS,
2280	[AC_CACHE_CHECK(for restartable system calls, ac_cv_sys_restartable_syscalls,
2281	[AC_TRY_RUN(
2282	[/* Exit 0 (true) if wait returns something other than -1,
2283	i.e. the pid of the child, which means that wait was restarted
2284	after getting the signal. */
2285	#include <sys/types.h>
2286	#include <signal.h>
2287	ucatch (isig) { }
2288	main () {
2289	int i = fork (), status;
2290	if (i == 0) { sleep (3); kill (getppid (), SIGINT); sleep (3); exit (0); }
2291	signal (SIGINT, ucatch);
2292	status = wait(&i);
2293	if (status == -1) wait(&i);
2294	exit (status == -1);
2295	}
2296	], ac_cv_sys_restartable_syscalls=yes, ac_cv_sys_restartable_syscalls=no)])
2297	if test $ac_cv_sys_restartable_syscalls = yes; then
2298	AC_DEFINE(HAVE_RESTARTABLE_SYSCALLS)
2299	fi
2300	])
2301
2302	AC_DEFUN(AC_PATH_X,
2303	[AC_REQUIRE_CPP()dnl Set CPP; we run AC_PATH_X_DIRECT conditionally.
2304	# If we find X, set shell vars x_includes and x_libraries to the
2305	# paths, otherwise set no_x=yes.
2306	# Uses ac_ vars as temps to allow command line to override cache and checks.
2307	# --without-x overrides everything else, but does not touch the cache.
2308	AC_MSG_CHECKING(for X)
2309
2310	AC_ARG_WITH(x, [ --with-x use the X Window System])
2311	# $have_x is `yes', `no', `disabled', or empty when we do not yet know.
2312	if test "x$with_x" = xno; then
2313	# The user explicitly disabled X.
2314	have_x=disabled
2315	else
2316	if test "x$x_includes" != xNONE && test "x$x_libraries" != xNONE; then
2317	# Both variables are already set.
2318	have_x=yes
2319	else
2320	AC_CACHE_VAL(ac_cv_have_x,
2321	[# One or both of the vars are not set, and there is no cached value.
2322	ac_x_includes=NO ac_x_libraries=NO
2323	AC_PATH_X_XMKMF
2324	AC_PATH_X_DIRECT
2325	if test "$ac_x_includes" = NO \|\| test "$ac_x_libraries" = NO; then
2326	# Didn't find X anywhere. Cache the known absence of X.
2327	ac_cv_have_x="have_x=no"
2328	else
2329	# Record where we found X for the cache.
2330	ac_cv_have_x="have_x=yes \
2331	ac_x_includes=$ac_x_includes ac_x_libraries=$ac_x_libraries"
2332	fi])dnl
2333	fi
2334	eval "$ac_cv_have_x"
2335	fi # $with_x != no
2336
2337	if test "$have_x" != yes; then
2338	AC_MSG_RESULT($have_x)
2339	no_x=yes
2340	else
2341	# If each of the values was on the command line, it overrides each guess.
2342	test "x$x_includes" = xNONE && x_includes=$ac_x_includes
2343	test "x$x_libraries" = xNONE && x_libraries=$ac_x_libraries
2344	# Update the cache value to reflect the command line values.
2345	ac_cv_have_x="have_x=yes \
2346	ac_x_includes=$x_includes ac_x_libraries=$x_libraries"
2347	AC_MSG_RESULT([libraries $x_libraries, headers $x_includes])
2348	fi
2349	])
2350
2351	dnl Internal subroutine of AC_PATH_X.
2352	dnl Set ac_x_includes and/or ac_x_libraries.
2353	AC_DEFUN(AC_PATH_X_XMKMF,
2354	[rm -fr conftestdir
2355	if mkdir conftestdir; then
2356	cd conftestdir
2357	# Make sure to not put "make" in the Imakefile rules, since we grep it out.
2358	cat > Imakefile <<'EOF'
2359	acfindx:
2360	@sh -c 'echo \'ac_im_incroot="${INCROOT}"; ac_im_usrlibdir="${DESTDIR}${USRLIBDIR}"; ac_im_libdir="${DESTDIR}${LIBDIR}"\''
2361	EOF
2362	if (xmkmf) >/dev/null 2>/dev/null && test -f Makefile; then
2363	# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
2364	eval `${MAKE-make} acfindx 2>/dev/null \| grep -v make`
2365	# Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
2366	for ac_extension in a so sl; do
2367	if test ! -f $ac_im_usrlibdir/${ac_cv_libpre}X11.$ac_extension &&
2368	test -f $ac_im_libdir/${ac_cv_libpre}X11.$ac_extension; then
2369	ac_im_usrlibdir=$ac_im_libdir; break
2370	fi
2371	done
2372	# Screen out bogus values from the imake configuration. They are
2373	# bogus both because they are the default anyway, and because
2374	# using them would break gcc on systems where it needs fixed includes.
2375	case "$ac_im_incroot" in
2376	/usr/include) ;;
2377	*) test -f "$ac_im_incroot/X11/Xos.h" && ac_x_includes="$ac_im_incroot" ;;
2378	esac
2379	case "$ac_im_usrlibdir" in
2380	/usr/lib \| /lib) ;;
2381	*) test -d "$ac_im_usrlibdir" && ac_x_libraries="$ac_im_usrlibdir" ;;
2382	esac
2383	fi
2384	cd ..
2385	rm -fr conftestdir
2386	fi
2387	])
2388
2389	dnl Internal subroutine of AC_PATH_X.
2390	dnl Set ac_x_includes and/or ac_x_libraries.
2391	AC_DEFUN(AC_PATH_X_DIRECT,
2392	[if test "$ac_x_includes" = NO; then
2393	# Guess where to find include files, by looking for this one X11 .h file.
2394	test -z "$x_direct_test_include" && x_direct_test_include=X11/Intrinsic.h
2395
2396	# First, try using that file with no special directory specified.
2397	AC_TRY_CPP([#include <$x_direct_test_include>],
2398	[# We can compile using X headers with no special include directory.
2399	ac_x_includes=],
2400	[# Look for the header file in a standard set of common directories.
2401	# Check X11 before X11Rn because it is often a symlink to the current release.
2402	for ac_dir in \
2403	/usr/X11/include \
2404	/usr/X11R6/include \
2405	/usr/X11R5/include \
2406	/usr/X11R4/include \
2407	\
2408	/usr/include/X11 \
2409	/usr/include/X11R6 \
2410	/usr/include/X11R5 \
2411	/usr/include/X11R4 \
2412	\
2413	/usr/local/X11/include \
2414	/usr/local/X11R6/include \
2415	/usr/local/X11R5/include \
2416	/usr/local/X11R4/include \
2417	\
2418	/usr/local/include/X11 \
2419	/usr/local/include/X11R6 \
2420	/usr/local/include/X11R5 \
2421	/usr/local/include/X11R4 \
2422	\
2423	/usr/X386/include \
2424	/usr/x386/include \
2425	/usr/XFree86/include/X11 \
2426	\
2427	/usr/include \
2428	/usr/local/include \
2429	/usr/unsupported/include \
2430	/usr/athena/include \
2431	/usr/local/x11r5/include \
2432	/usr/lpp/Xamples/include \
2433	\
2434	/usr/openwin/include \
2435	/usr/openwin/share/include \
2436	; \
2437	do
2438	if test -r "$ac_dir/$x_direct_test_include"; then
2439	ac_x_includes=$ac_dir
2440	break
2441	fi
2442	done])
2443	fi # $ac_x_includes = NO
2444
2445	if test "$ac_x_libraries" = NO; then
2446	# Check for the libraries.
2447
2448	test -z "$x_direct_test_library" && x_direct_test_library=Xt
2449	test -z "$x_direct_test_function" && x_direct_test_function=XtMalloc
2450
2451	# See if we find them without any special options.
2452	# Don't add to $LIBS permanently.
2453	ac_save_LIBS="$LIBS"
2454	LIBS="-l$x_direct_test_library $LIBS"
2455	AC_TRY_LINK(, [${x_direct_test_function}()],
2456	[LIBS="$ac_save_LIBS"
2457	# We can link X programs with no special library path.
2458	ac_x_libraries=],
2459	[LIBS="$ac_save_LIBS"
2460	# First see if replacing the include by lib works.
2461	# Check X11 before X11Rn because it is often a symlink to the current release.
2462	for ac_dir in `echo "$ac_x_includes" \| sed s/include/lib/` \
2463	/usr/X11/lib \
2464	/usr/X11R6/lib \
2465	/usr/X11R5/lib \
2466	/usr/X11R4/lib \
2467	\
2468	/usr/lib/X11 \
2469	/usr/lib/X11R6 \
2470	/usr/lib/X11R5 \
2471	/usr/lib/X11R4 \
2472	\
2473	/usr/local/X11/lib \
2474	/usr/local/X11R6/lib \
2475	/usr/local/X11R5/lib \
2476	/usr/local/X11R4/lib \
2477	\
2478	/usr/local/lib/X11 \
2479	/usr/local/lib/X11R6 \
2480	/usr/local/lib/X11R5 \
2481	/usr/local/lib/X11R4 \
2482	\
2483	/usr/X386/lib \
2484	/usr/x386/lib \
2485	/usr/XFree86/lib/X11 \
2486	\
2487	/usr/lib \
2488	/usr/local/lib \
2489	/usr/unsupported/lib \
2490	/usr/athena/lib \
2491	/usr/local/x11r5/lib \
2492	/usr/lpp/Xamples/lib \
2493	/lib/usr/lib/X11 \
2494	\
2495	/usr/openwin/lib \
2496	/usr/openwin/share/lib \
2497	; \
2498	do
2499	dnl Don't even attempt the hair of trying to link an X program!
2500	for ac_extension in a so sl; do
2501	if test -r $ac_dir/${ac_cv_libpre}${x_direct_test_library}.$ac_extension; then
2502	ac_x_libraries=$ac_dir
2503	break 2
2504	fi
2505	done
2506	done])
2507	fi # $ac_x_libraries = NO
2508	])
2509
2510	dnl Find additional X libraries, magic flags, etc.
2511	AC_DEFUN(AC_PATH_XTRA,
2512	[AC_REQUIRE([AC_PATH_X])dnl
2513	if test "$no_x" = yes; then
2514	# Not all programs may use this symbol, but it does not hurt to define it.
2515	AC_DEFINE(X_DISPLAY_MISSING)
2516	X_CFLAGS= X_PRE_LIBS= X_LIBS= X_EXTRA_LIBS=
2517	else
2518	if test -n "$x_includes"; then
2519	X_CFLAGS="$X_CFLAGS -I$x_includes"
2520	fi
2521	test -n "$x_includes" && CPPFLAGS="$CPPFLAGS -I$x_includes"
2522
2523	# It would also be nice to do this for all -L options, not just this one.
2524	if test -n "$x_libraries"; then
2525	X_LIBS="$X_LIBS -L$x_libraries"
2526	dnl FIXME banish uname from this macro!
2527	# For Solaris; some versions of Sun CC require a space after -R and
2528	# others require no space. Words are not sufficient . . . .
2529	case "`(uname -sr) 2>/dev/null`" in
2530	"SunOS 5"*)
2531	AC_MSG_CHECKING(whether -R must be followed by a space)
2532	ac_xsave_LIBS="$LIBS"; LIBS="$LIBS -R$x_libraries"
2533	AC_TRY_LINK(, , ac_R_nospace=yes, ac_R_nospace=no)
2534	if test $ac_R_nospace = yes; then
2535	AC_MSG_RESULT(no)
2536	X_LIBS="$X_LIBS -R$x_libraries"
2537	else
2538	LIBS="$ac_xsave_LIBS -R $x_libraries"
2539	AC_TRY_LINK(, , ac_R_space=yes, ac_R_space=no)
2540	if test $ac_R_space = yes; then
2541	AC_MSG_RESULT(yes)
2542	X_LIBS="$X_LIBS -R $x_libraries"
2543	else
2544	AC_MSG_RESULT(neither works)
2545	fi
2546	fi
2547	LIBS="$ac_xsave_LIBS"
2548	esac
2549	fi
2550
2551	# Check for system-dependent libraries X programs must link with.
2552	# Do this before checking for the system-independent R6 libraries
2553	# (-lICE), since we may need -lsocket or whatever for X linking.
2554
2555	if test "$ISC" = yes; then
2556	X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl_s -linet"
2557	else
2558	# Martyn.Johnson@cl.cam.ac.uk says this is needed for Ultrix, if the X
2559	# libraries were built with DECnet support. And karl@cs.umb.edu says
2560	# the Alpha needs dnet_stub (dnet does not exist).
2561	AC_CHECK_LIB(dnet, dnet_ntoa, [X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet"])
2562	if test $ac_cv_lib_dnet_dnet_ntoa = no; then
2563	AC_CHECK_LIB(dnet_stub, dnet_ntoa,
2564	[X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"])
2565	fi
2566
2567	# msh@cis.ufl.edu says -lnsl (and -lsocket) are needed for his 386/AT,
2568	# to get the SysV transport functions.
2569	# chad@anasazi.com says the Pyramis MIS-ES running DC/OSx (SVR4)
2570	# needs -lnsl.
2571	# The nsl library prevents programs from opening the X display
2572	# on Irix 5.2, according to dickey@clark.net.
2573	AC_CHECK_FUNC(gethostbyname)
2574	if test $ac_cv_func_gethostbyname = no; then
2575	AC_CHECK_LIB(nsl, gethostbyname, X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl")
2576	fi
2577
2578	# lieder@skyler.mavd.honeywell.com says without -lsocket,
2579	# socket/setsockopt and other routines are undefined under SCO ODT
2580	# 2.0. But -lsocket is broken on IRIX 5.2 (and is not necessary
2581	# on later versions), says simon@lia.di.epfl.ch: it contains
2582	# gethostby* variants that don't use the nameserver (or something).
2583	# -lsocket must be given before -lnsl if both are needed.
2584	# We assume that if connect needs -lnsl, so does gethostbyname.
2585	AC_CHECK_FUNC(connect)
2586	if test $ac_cv_func_connect = no; then
2587	AC_CHECK_LIB(socket, connect, X_EXTRA_LIBS="-lsocket $X_EXTRA_LIBS", ,
2588	$X_EXTRA_LIBS)
2589	fi
2590
2591	# gomez@mi.uni-erlangen.de says -lposix is necessary on A/UX.
2592	AC_CHECK_FUNC(remove)
2593	if test $ac_cv_func_remove = no; then
2594	AC_CHECK_LIB(posix, remove, X_EXTRA_LIBS="$X_EXTRA_LIBS -lposix")
2595	fi
2596
2597	# BSDI BSD/OS 2.1 needs -lipc for XOpenDisplay.
2598	AC_CHECK_FUNC(shmat)
2599	if test $ac_cv_func_shmat = no; then
2600	AC_CHECK_LIB(ipc, shmat, X_EXTRA_LIBS="$X_EXTRA_LIBS -lipc")
2601	fi
2602	# XFree86/OS2
2603	if test $ac_cv_func_shmat = no; then
2604	AC_CHECK_LIB(shm, shmat, X_EXTRA_LIBS="$X_EXTRA_LIBS -lshm")
2605	fi
2606	fi
2607
2608	# Check for libraries that X11R6 Xt/Xaw programs need.
2609	ac_save_LDFLAGS="$LDFLAGS"
2610	test -n "$x_libraries" && LDFLAGS="$LDFLAGS -L$x_libraries"
2611	# SM needs ICE to (dynamically) link under SunOS 4.x (so we have to
2612	# check for ICE first), but we must link in the order -lSM -lICE or
2613	# we get undefined symbols. So assume we have SM if we have ICE.
2614	# These have to be linked with before -lX11, unlike the other
2615	# libraries we check for below, so use a different variable.
2616	# --interran@uluru.Stanford.EDU, kb@cs.umb.edu.
2617	AC_CHECK_LIB(ICE, IceConnectionNumber,
2618	[X_PRE_LIBS="$X_PRE_LIBS -lSM -lICE"], , $X_EXTRA_LIBS)
2619	LDFLAGS="$ac_save_LDFLAGS"
2620
2621	fi
2622	AC_SUBST(X_CFLAGS)dnl
2623	AC_SUBST(X_PRE_LIBS)dnl
2624	AC_SUBST(X_LIBS)dnl
2625	AC_SUBST(X_EXTRA_LIBS)dnl
2626	])
2627
2628	dnl The old Cygwin32 macro is deprecated.
2629	AC_DEFUN(AC_CYGWIN32,
2630	[AC_OBSOLETE([$0], [; instead use AC_CYGWIN])dnl
2631	AC_CYGWIN])
2632
2633	dnl Check for Cygwin. This is a way to set the right value for
2634	dnl EXEEXT.
2635	AC_DEFUN(AC_CYGWIN,
2636	[AC_CACHE_CHECK(for Cygwin environment, ac_cv_cygwin,
2637	[AC_TRY_COMPILE(,[
2638	#ifndef __CYGWIN__
2639	#define __CYGWIN__ __CYGWIN32__
2640	#endif
2641	return __CYGWIN__;],
2642	ac_cv_cygwin=yes, ac_cv_cygwin=no)
2643	rm -f conftest*])
2644	CYGWIN=
2645	test "$ac_cv_cygwin" = yes && CYGWIN=yes])
2646
2647	dnl Check for mingw32. This is another way to set the right value for
2648	dnl EXEEXT.
2649	AC_DEFUN(AC_MINGW32,
2650	[AC_CACHE_CHECK(for mingw32 environment, ac_cv_mingw32,
2651	[AC_TRY_COMPILE(,[return __MINGW32__;],
2652	ac_cv_mingw32=yes, ac_cv_mingw32=no)
2653	rm -f conftest*])
2654	MINGW32=
2655	test "$ac_cv_mingw32" = yes && MINGW32=yes])
2656
2657	dnl Check for EMX/OS2. This is another way to set the right value for
2658	dnl EXEEXT.
2659	AC_DEFUN(AC_EMXOS2,
2660	[AC_CACHE_CHECK(for EMX/OS2 environment, ac_cv_emxos2,
2661	[: ${CC=gcc.exe}
2662	AC_TRY_COMPILE(,[return __EMX__;],
2663	ac_cv_emxos2=yes, ac_cv_emxos2=no)
2664	rm -f conftest*])
2665	AC_CACHE_VAL(ac_cv_libpre,
2666	if test "$ac_cv_emxos2" = yes ; then
2667	ac_cv_libpre=
2668	else
2669	ac_cv_libpre=lib
2670	fi
2671	)
2672	EMXOS2=
2673	test "$ac_cv_emxos2" = yes && EMXOS2=yes])
2674
2675	dnl Check for the extension used for executables. This knows that we
2676	dnl add .exe for Cygwin or mingw32. Otherwise, it compiles a test
2677	dnl executable. If this is called, the executable extensions will be
2678	dnl automatically used by link commands run by the configure script.
2679	AC_DEFUN(AC_EXEEXT,
2680	[AC_REQUIRE([AC_CYGWIN])
2681	AC_REQUIRE([AC_MINGW32])
2682	AC_REQUIRE([AC_EMXOS2])
2683	AC_MSG_CHECKING([for executable suffix])
2684	AC_CACHE_VAL(ac_cv_exeext,
2685	[if test "$CYGWIN" = yes \|\| test "$MINGW32" = yes \|\| test "$EMXOS2" = yes; then
2686	ac_cv_exeext=.exe
2687	else
2688	rm -f conftest*
2689	echo 'int main () { return 0; }' > conftest.$ac_ext
2690	ac_cv_exeext=
2691	if AC_TRY_EVAL(ac_link); then
2692	for file in conftest.*; do
2693	case $file in
2694	.c \| .o \| *.obj) ;;
2695	*) ac_cv_exeext=`echo $file \| sed -e s/conftest//` ;;
2696	esac
2697	done
2698	else
2699	AC_MSG_ERROR([installation or configuration problem: compiler cannot create executables.])
2700	fi
2701	rm -f conftest*
2702	test x"${ac_cv_exeext}" = x && ac_cv_exeext=no
2703	fi])
2704	EXEEXT=""
2705	test x"${ac_cv_exeext}" != xno && EXEEXT=${ac_cv_exeext}
2706	AC_MSG_RESULT(${ac_cv_exeext})
2707	dnl Setting ac_exeext will implicitly change the ac_link command.
2708	ac_exeext=$EXEEXT
2709	AC_SUBST(EXEEXT)])
2710
2711
2712	dnl set PATH_IFS
2713	AC_DEFUN(AC_PATHIFS,
2714	[AC_MSG_CHECKING([for path separator])
2715	# Filter path to get backslahes into forwardslashes
2716	case "`uname -s 2> /dev/null`" in
2717	OS/2)
2718	PATH=`echo -E "$PATH" \| sed 's+\\\\+/+g'`
2719	PATH_IFS=';'
2720	;;
2721	*)
2722	PATH_IFS=':'
2723	;;
2724	esac
2725	AC_MSG_RESULT(${PATH_IFS})
2726	AC_SUBST(PATH_IFS)])
2727
2728	dnl Reformat a explicit path, so that it only shows '/'
2729	dnl Care is needed: it cannot be used in a '...' expression.
2730	define([AC_FORMAT_PATH],[`echo -E "$1" \| sed 's+\\\\+/+g'`])
2731
2732
2733	dnl ### Checks for UNIX variants
2734	dnl These are kludges which should be replaced by a single POSIX check.
2735	dnl They aren't cached, to discourage their use.
2736
2737
2738	AC_DEFUN(AC_AIX,
2739	[AC_BEFORE([$0], [AC_TRY_COMPILE])dnl
2740	AC_BEFORE([$0], [AC_TRY_RUN])dnl
2741	AC_MSG_CHECKING(for AIX)
2742	AC_EGREP_CPP(yes,
2743	[#ifdef _AIX
2744	yes
2745	#endif
2746	], [AC_MSG_RESULT(yes); AC_DEFINE(_ALL_SOURCE)], AC_MSG_RESULT(no))
2747	])
2748
2749	AC_DEFUN(AC_MINIX,
2750	[AC_BEFORE([$0], [AC_TRY_COMPILE])dnl
2751	AC_BEFORE([$0], [AC_TRY_RUN])dnl
2752	AC_CHECK_HEADER(minix/config.h, MINIX=yes, MINIX=)
2753	if test "$MINIX" = yes; then
2754	AC_DEFINE(_POSIX_SOURCE)
2755	AC_DEFINE(_POSIX_1_SOURCE, 2)
2756	AC_DEFINE(_MINIX)
2757	fi
2758	])
2759
2760	AC_DEFUN(AC_ISC_POSIX,
2761	[AC_REQUIRE([AC_PROG_CC])dnl
2762	AC_BEFORE([$0], [AC_TRY_COMPILE])dnl
2763	AC_BEFORE([$0], [AC_TRY_RUN])dnl
2764	AC_MSG_CHECKING(for POSIXized ISC)
2765	if test -d /etc/conf/kconfig.d &&
2766	grep _POSIX_VERSION [/usr/include/sys/unistd.h] >/dev/null 2>&1
2767	then
2768	AC_MSG_RESULT(yes)
2769	ISC=yes # If later tests want to check for ISC.
2770	AC_DEFINE(_POSIX_SOURCE)
2771	if test "$GCC" = yes; then
2772	CC="$CC -posix"
2773	else
2774	CC="$CC -Xp"
2775	fi
2776	else
2777	AC_MSG_RESULT(no)
2778	ISC=
2779	fi
2780	])
2781
2782	AC_DEFUN(AC_XENIX_DIR,
2783	[AC_OBSOLETE([$0], [; instead use AC_HEADER_DIRENT])dnl
2784	AC_REQUIRE([AC_DIR_HEADER])dnl
2785	AC_MSG_CHECKING(for Xenix)
2786	AC_EGREP_CPP(yes,
2787	[#if defined(M_XENIX) && !defined(M_UNIX)
2788	yes
2789	#endif
2790	], [AC_MSG_RESULT(yes); XENIX=yes], [AC_MSG_RESULT(no); XENIX=])
2791	if test "$XENIX" = yes; then
2792	# Make sure -ldir precedes -lx.
2793	test $ac_header_dirent = dirent.h && LIBS="-ldir $LIBS"
2794	LIBS="$LIBS -lx"
2795	fi
2796	])
2797
2798	AC_DEFUN(AC_DYNIX_SEQ,
2799	[AC_OBSOLETE([$0], [; instead use AC_FUNC_GETMNTENT])dnl
2800	AC_CHECK_LIB(seq, getmntent, LIBS="-lseq $LIBS")
2801	])
2802
2803	AC_DEFUN(AC_IRIX_SUN,
2804	[AC_OBSOLETE([$0], [; instead use AC_FUNC_GETMNTENT or AC_CHECK_LIB(sun, getpwnam)])dnl
2805	AC_CHECK_LIB(sun, getmntent, LIBS="-lsun $LIBS")
2806	])
2807
2808	AC_DEFUN(AC_SCO_INTL,
2809	[AC_OBSOLETE([$0], [; instead use AC_FUNC_STRFTIME])dnl
2810	AC_CHECK_LIB(intl, strftime, LIBS="-lintl $LIBS")
2811	])

Note: See TracBrowser for help on using the repository browser.

Context Navigation

source: trunk/essentials/sys-devel/autoconf-2.13/acspecific.m4@ 3162

Download in other formats: