* lib/time.in.h (TIME_UTC, GNULIB_defined_TIME_UTC): New macros.
* m4/time_h.m4 (gl_HEADER_TIME_H_BODY): Set TIME_H_DEFINES_TIME_UTC.
* modules/time (Makefile.am): Substitute TIME_H_DEFINES_TIME_UTC.
* tests/test-time.c: Check that TIME_UTC is defined and a positive
integer.
* doc/posix-headers/time.texi: Mention TIME_UTC.
+2021-01-01 Bruno Haible <bruno@clisp.org>
+
+ time: Define TIME_UTC.
+ * lib/time.in.h (TIME_UTC, GNULIB_defined_TIME_UTC): New macros.
+ * m4/time_h.m4 (gl_HEADER_TIME_H_BODY): Set TIME_H_DEFINES_TIME_UTC.
+ * modules/time (Makefile.am): Substitute TIME_H_DEFINES_TIME_UTC.
+ * tests/test-time.c: Check that TIME_UTC is defined and a positive
+ integer.
+ * doc/posix-headers/time.texi: Mention TIME_UTC.
+
2021-01-01 Bruno Haible <bruno@clisp.org>
stddef: Try harder to get max_align_t defined on OpenBSD, part 2.
@itemize
@item
@samp{struct timespec} is not defined on some platforms.
-
+@item
+The macro @code{TIME_UTC} is not defined on many platforms:
+glibc 2.15, Mac OS X 10.13, FreeBSD 6.4, NetBSD 7.1, OpenBSD 6.0, Minix 3.1.8, AIX 7.1, HP-UX 11.31, IRIX 6.5, Solaris 11.3, Cygwin 2.9, mingw, MSVC 14, Android 9.0.
@item
Some platforms provide a @code{NULL} macro that cannot be used in arbitrary
expressions:
-NetBSD 5.0
+NetBSD 5.0.
@end itemize
Portability problems not fixed by Gnulib:
# define GNULIB_defined_struct_time_t_must_be_integral 1
# endif
+/* Define TIME_UTC, a positive integer constant used for timespec_get(). */
+# if ! @TIME_H_DEFINES_TIME_UTC@
+# if !GNULIB_defined_TIME_UTC
+# define TIME_UTC 1
+# define GNULIB_defined_TIME_UTC 1
+# endif
+# endif
+
/* Sleep for at least RQTP seconds unless interrupted, If interrupted,
return -1 and store the remaining time into RMTP. See
<https://pubs.opengroup.org/onlinepubs/9699919799/functions/nanosleep.html>. */
# Copyright (C) 2000-2001, 2003-2007, 2009-2021 Free Software Foundation, Inc.
-# serial 13
+# serial 14
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
AC_REQUIRE([AC_C_RESTRICT])
+
+ AC_CACHE_CHECK([for TIME_UTC in <time.h>],
+ [gl_cv_time_h_has_TIME_UTC],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <time.h>
+ ]],
+ [[static int x = TIME_UTC; x++;]])],
+ [gl_cv_time_h_has_TIME_UTC=yes],
+ [gl_cv_time_h_has_TIME_UTC=no])])
+ if test $gl_cv_time_h_has_TIME_UTC = yes; then
+ TIME_H_DEFINES_TIME_UTC=1
+ else
+ TIME_H_DEFINES_TIME_UTC=0
+ fi
+ AC_SUBST([TIME_H_DEFINES_TIME_UTC])
])
dnl Check whether 'struct timespec' is declared
-e 's|@''SYS_TIME_H_DEFINES_STRUCT_TIMESPEC''@|$(SYS_TIME_H_DEFINES_STRUCT_TIMESPEC)|g' \
-e 's|@''TIME_H_DEFINES_STRUCT_TIMESPEC''@|$(TIME_H_DEFINES_STRUCT_TIMESPEC)|g' \
-e 's|@''UNISTD_H_DEFINES_STRUCT_TIMESPEC''@|$(UNISTD_H_DEFINES_STRUCT_TIMESPEC)|g' \
+ -e 's|@''TIME_H_DEFINES_TIME_UTC''@|$(TIME_H_DEFINES_TIME_UTC)|g' \
-e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
-e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
-e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
per POSIX 2008. */
verify (sizeof NULL == sizeof (void *));
+/* Check that TIME_UTC is defined and a positive integer. */
+int t3 = TIME_UTC;
+verify (TIME_UTC > 0);
+
int
main (void)
{