| 1 | #serial 13
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| 2 |
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| 3 | # Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software
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| 4 | # Foundation, Inc.
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| 5 |
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| 6 | # This file is free software; the Free Software Foundation
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| 7 | # gives unlimited permission to copy and/or distribute it,
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| 8 | # with or without modifications, as long as this notice is preserved.
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| 9 |
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| 10 | dnl From Jim Meyering
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| 11 |
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| 12 | AC_DEFUN([gl_TIMESPEC],
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| 13 | [
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| 14 | dnl Prerequisites of lib/timespec.h.
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| 15 | AC_REQUIRE([AC_C_INLINE])
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| 16 | AC_CHECK_HEADERS_ONCE(sys/time.h)
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| 17 | gl_CHECK_TYPE_STRUCT_TIMESPEC
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| 18 |
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| 19 | dnl Persuade glibc and Solaris <time.h> to declare nanosleep.
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| 20 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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| 21 |
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| 22 | AC_CHECK_DECLS(nanosleep, , , [#include <time.h>])
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| 23 | ])
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| 24 |
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| 25 | dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared
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| 26 | dnl in time.h or sys/time.h.
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| 27 |
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| 28 | AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
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| 29 | [
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| 30 | dnl Persuade pedantic Solaris to declare struct timespec.
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| 31 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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| 32 |
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| 33 | AC_CHECK_HEADERS_ONCE(sys/time.h)
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| 34 | AC_CACHE_CHECK([for struct timespec], [gl_cv_sys_struct_timespec],
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| 35 | [AC_COMPILE_IFELSE(
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| 36 | [AC_LANG_PROGRAM(
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| 37 | [[#if HAVE_SYS_TIME_H
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| 38 | #include <sys/time.h>
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| 39 | #endif
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| 40 | #include <time.h>
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| 41 | ]],
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| 42 | [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
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| 43 | [gl_cv_sys_struct_timespec=yes],
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| 44 | [gl_cv_sys_struct_timespec=no])])
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| 45 |
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| 46 | if test $gl_cv_sys_struct_timespec = yes; then
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| 47 | AC_DEFINE(HAVE_STRUCT_TIMESPEC, 1,
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| 48 | [Define if struct timespec is declared in <time.h>. ])
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| 49 | fi
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| 50 | ])
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