| 1 | ## Copyright (C) 1996 Free Software Foundation, Inc.
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| 2 |
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| 3 | ## This program is free software; you can redistribute it and/or modify
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| 4 | ## it under the terms of the GNU General Public License as published by
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| 5 | ## the Free Software Foundation; either version 2, or (at your option)
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| 6 | ## any later version.
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| 7 |
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| 8 | ## This program is distributed in the hope that it will be useful,
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| 9 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 10 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 11 | ## GNU General Public License for more details.
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| 12 |
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| 13 | ## You should have received a copy of the GNU General Public License
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| 14 | ## along with this program; if not, write to the Free Software
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| 15 | ## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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| 16 | ## 02111-1307, USA.
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| 17 |
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| 18 | ## From Jim Meyering.
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| 19 |
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| 20 | ## serial 1
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| 21 |
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| 22 | ## @defmac AC_FUNC_STRTOD
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| 23 | ## @maindex FUNC_STRTOD
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| 24 | ## @ovindex LIBOBJS
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| 25 | ## If the @code{strtod} function is not available, or does not work
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| 26 | ## correctly (like the one on SunOS 5.4), add @samp{strtod.o} to output
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| 27 | ## variable @code{LIBOBJS}.
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| 28 | ## @end defmac
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| 29 |
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| 30 | AC_DEFUN([AM_FUNC_STRTOD],
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| 31 | [AC_CACHE_CHECK(for working strtod, am_cv_func_strtod,
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| 32 | [AC_TRY_RUN([
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| 33 | double strtod ();
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| 34 | int
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| 35 | main()
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| 36 | {
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| 37 | {
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| 38 | /* Some versions of Linux strtod mis-parse strings with leading '+'. */
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| 39 | char *string = " +69";
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| 40 | char *term;
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| 41 | double value;
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| 42 | value = strtod (string, &term);
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| 43 | if (value != 69 || term != (string + 4))
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| 44 | exit (1);
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| 45 | }
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| 46 |
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| 47 | {
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| 48 | /* Under Solaris 2.4, strtod returns the wrong value for the
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| 49 | terminating character under some conditions. */
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| 50 | char *string = "NaN";
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| 51 | char *term;
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| 52 | strtod (string, &term);
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| 53 | if (term != string && *(term - 1) == 0)
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| 54 | exit (1);
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| 55 | }
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| 56 | exit (0);
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| 57 | }
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| 58 | ], am_cv_func_strtod=yes, am_cv_func_strtod=no, am_cv_func_strtod=no)])
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| 59 | test $am_cv_func_strtod = no && LIBOBJS="$LIBOBJS strtod.o"
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| 60 | AC_SUBST(LIBOBJS)dnl
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| 61 | am_cv_func_strtod_needs_libm=no
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| 62 | if test $am_cv_func_strtod = no; then
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| 63 | AC_CHECK_FUNCS(pow)
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| 64 | if test $ac_cv_func_pow = no; then
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| 65 | AC_CHECK_LIB(m, pow, [am_cv_func_strtod_needs_libm=yes],
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| 66 | [AC_MSG_WARN(can't find library containing definition of pow)])
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| 67 | fi
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| 68 | fi
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| 69 | ])
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