AC_DEFUN([gl_TIME_R],
[
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
AC_REQUIRE([AC_C_RESTRICT])
AC_CACHE_CHECK([whether localtime_r is compatible with its POSIX signature],
[gl_cv_time_r_posix],
[AC_TRY_COMPILE(
[ [/* We don't need to append 'restrict's to the argument types,
even though the POSIX signature has the 'restrict's,
since C99 says they can't affect type compatibility. */
struct tm * (*ptr) (time_t const *, struct tm *) = localtime_r;
if (ptr) return 0;],
[gl_cv_time_r_posix=yes],
[gl_cv_time_r_posix=no])])
if test $gl_cv_time_r_posix = yes; then
REPLACE_LOCALTIME_R=0
else
REPLACE_LOCALTIME_R=1
AC_LIBOBJ([time_r])
gl_PREREQ_TIME_R
fi
])
AC_DEFUN([gl_PREREQ_TIME_R], [
:
])