forked from Github/emacs
846657afaf
This incorporates: 2020-08-16 time_rz: remove unused functions 2020-08-16 time_rz: fix issues with mktime_z failures 2020-08-16 nstrftime: Guide inlining also on clang 2020-08-16 intprops: Avoid bogus warning on clang 2020-08-16 libc-config: Enable __REDIRECT macro also on clang 2020-08-16 regex: Use initializer shorthand syntax also with clang 2020-08-16 regex: Use space optimization also with clang 2020-08-16 Use _Static_assert and static_assert when present on clang 2020-08-16 Use 'throw ()' for optimization in C++ mode also on clang 2020-08-16 stdio: Don't break attribute 'scanf' on clang 2020-08-16 Fix "warning: 'format' attribute ...: rpl_printf" 2020-08-16 Fix "warning: attribute declaration must precede definition" 2020-08-16 Fix undesired warnings 2020-08-16 Don't use Autoconf quadrigraphsxo 2020-08-16 Fix quoting of AC_LANG_PROGRAM arguments 2020-08-16 Assume autoconf >= 2.64 2020-08-15 nstrftime: be more predictable about errno 2020-08-15 canonicalize: Fix autoconf test on MSVC/clang 2020-08-15 Support compiling without -loldnames on native Windows 2020-08-14 mktime, mktime-internal: Remove obsolete code 2020-08-14 Assume tzset exists * lib/c++defs.h, lib/canonicalize-lgpl.c, lib/cdefs.h, lib/dup2.c: * lib/fcntl.in.h, lib/getopt-cdefs.in.h, lib/intprops.h, lib/md5.h: * lib/mktime.c, lib/nstrftime.c, lib/open.c, lib/regcomp.c: * lib/regex_internal.h, lib/stdio.in.h, lib/stdlib.in.h: * lib/strftime.h, lib/string.in.h, lib/sys_select.in.h: * lib/sys_stat.in.h, lib/sys_time.in.h, lib/time.in.h, lib/time_rz.c: * lib/unistd.in.h, lib/verify.h, m4/00gnulib.m4: * m4/absolute-header.m4, m4/alloca.m4, m4/canonicalize.m4, m4/dup2.m4: * m4/fchmodat.m4, m4/fcntl.m4, m4/fdopendir.m4, m4/fpending.m4: * m4/futimens.m4, m4/getdtablesize.m4, m4/getloadavg.m4: * m4/gnulib-common.m4, m4/include_next.m4, m4/largefile.m4: * m4/manywarnings.m4, m4/mktime.m4, m4/nstrftime.m4, m4/open-slash.m4: * m4/pselect.m4, m4/pthread_sigmask.m4, m4/time_h.m4, m4/utimens.m4: * m4/utimensat.m4, m4/utimes.m4, m4/warnings.m4: Copy from Gnulib. * lib/gnulib.mk.in: Regenerate.
70 lines
2.3 KiB
Text
70 lines
2.3 KiB
Text
# serial 7
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# See if we need to provide utimensat replacement.
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dnl Copyright (C) 2009-2020 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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# Written by Eric Blake.
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AC_DEFUN([gl_FUNC_UTIMENSAT],
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[
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AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_FUNCS_ONCE([utimensat])
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if test $ac_cv_func_utimensat = no; then
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HAVE_UTIMENSAT=0
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else
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AC_CACHE_CHECK([whether utimensat works],
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[gl_cv_func_utimensat_works],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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]GL_MDA_DEFINES],
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[[int result = 0;
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const char *f = "conftest.file";
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if (close (creat (f, 0600)))
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return 1;
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/* Test whether the AT_SYMLINK_NOFOLLOW flag is supported. */
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{
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if (utimensat (AT_FDCWD, f, NULL, AT_SYMLINK_NOFOLLOW))
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result |= 2;
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}
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/* Test whether UTIME_NOW and UTIME_OMIT work. */
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{
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struct timespec ts[2];
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ts[0].tv_sec = 1;
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ts[0].tv_nsec = UTIME_OMIT;
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ts[1].tv_sec = 1;
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ts[1].tv_nsec = UTIME_NOW;
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if (utimensat (AT_FDCWD, f, ts, 0))
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result |= 4;
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}
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sleep (1);
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{
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struct stat st;
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struct timespec ts[2];
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ts[0].tv_sec = 1;
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ts[0].tv_nsec = UTIME_NOW;
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ts[1].tv_sec = 1;
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ts[1].tv_nsec = UTIME_OMIT;
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if (utimensat (AT_FDCWD, f, ts, 0))
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result |= 8;
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if (stat (f, &st))
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result |= 16;
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else if (st.st_ctime < st.st_atime)
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result |= 32;
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}
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return result;
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]])],
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[gl_cv_func_utimensat_works=yes],
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[gl_cv_func_utimensat_works=no],
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[gl_cv_func_utimensat_works="guessing yes"])])
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if test "$gl_cv_func_utimensat_works" = no; then
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REPLACE_UTIMENSAT=1
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fi
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fi
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])
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