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+# gettime.m4 serial 14
+dnl Copyright (C) 2002, 2004-2006, 2009-2023 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_GETTIME],
+[
+ dnl Prerequisites of lib/gettime.c.
+ AC_REQUIRE([gl_CLOCK_TIME])
+ AC_REQUIRE([gl_TIMESPEC])
+
+ AC_REQUIRE([gl_CHECK_FUNC_TIMESPEC_GET])
+ if test $gl_cv_func_timespec_get = yes; then
+ AC_DEFINE([HAVE_TIMESPEC_GET], [1],
+ [Define if you have the timespec_get function.])
+ fi
+])
+
+dnl Tests whether the function timespec_get exists.
+dnl Sets gl_cv_func_timespec_get and gl_cv_onwards_func_timespec_get.
+AC_DEFUN([gl_CHECK_FUNC_TIMESPEC_GET],
+[
+ AC_REQUIRE([AC_CANONICAL_HOST])
+
+ dnl Persuade OpenBSD <time.h> to declare timespec_get().
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+ dnl We can't use AC_CHECK_FUNC here, because timespec_get() is defined as a
+ dnl static inline function in <time.h> on MSVC 14.
+ dnl But at the same time, we need to notice a missing declaration, like
+ dnl gl_CHECK_FUNCS_ANDROID does.
+ AC_CHECK_DECL([timespec_get], , , [[#include <time.h>]])
+ AC_CACHE_CHECK([for timespec_get], [gl_cv_onwards_func_timespec_get],
+ [if test $ac_cv_have_decl_timespec_get = yes; then
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <time.h>
+ struct timespec ts;
+ ]],
+ [[return timespec_get (&ts, 0);]])
+ ],
+ [gl_cv_onwards_func_timespec_get=yes],
+ [gl_cv_onwards_func_timespec_get=no])
+ else
+ gl_cv_onwards_func_timespec_get=no
+ fi
+ case "$host_os" in
+ linux*-android*)
+ if test $gl_cv_onwards_func_timespec_get = no; then
+ gl_cv_onwards_func_timespec_get='future OS version'
+ fi
+ ;;
+ esac
+ ])
+ case "$gl_cv_onwards_func_timespec_get" in
+ future*) gl_cv_func_timespec_get=no ;;
+ *) gl_cv_func_timespec_get=$gl_cv_onwards_func_timespec_get ;;
+ esac
+])
+
+AC_DEFUN([gl_GETTIME_RES],
+[
+ dnl Prerequisites of lib/gettime-res.c.
+ AC_REQUIRE([gl_CLOCK_TIME])
+ AC_REQUIRE([gl_TIMESPEC])
+ AC_CHECK_FUNCS_ONCE([timespec_getres])
+])