1 dnl Reentrant time functions like localtime_r.
3 dnl Copyright (C) 2003 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 dnl Written by Paul Eggert.
12 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
13 AC_REQUIRE([gl_C_RESTRICT])
15 AC_CACHE_CHECK([whether localtime_r is compatible with its POSIX signature],
19 [/* We don't need to append 'restrict's to the argument types,
20 even though the POSIX signature has the 'restrict's,
21 since C99 says they can't affect type compatibility. */
22 struct tm * (*ptr) (time_t const *, struct tm *) = localtime_r;],
23 [gl_cv_time_r_posix=yes],
24 [gl_cv_time_r_posix=no])])
25 if test $gl_cv_time_r_posix = yes; then
26 AC_DEFINE([HAVE_TIME_R_POSIX], 1,
27 [Define to 1 if localtime_r, etc. have the type signatures that
35 # Prerequisites of lib/time_r.c.
36 AC_DEFUN([gl_PREREQ_TIME_R], [