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mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-04 08:47:11 +00:00
emacs/m4/utimens.m4
Paul Eggert 79f15092b9 Update from Gnulib
This incorporates:
2018-05-21 crypto: omit stream ops Emacs doesn’t need
2018-05-13 truncate: Fix compilation error on Android
2018-05-13 imaxdiv: Fix compilation error on Android
2018-05-13 Support selective inclusion of recent mingw.org headers
2018-05-13 Add cross-compilation guesses for Linux systems sans glibc
2018-05-13 stdioext: Fix compilation errors with newer Android headers
2018-05-07 af_alg: Pacify --enable-gcc-warnings
2018-05-06 af_alg: Fix bug with streams that are not at position 0
2018-05-06 Followup to 'af_alg: New module'
2018-05-05 crypto/{md5,sha1,sha256,sha512}: simplify
2018-05-05 af_alg: New module
2018-05-05 af_alg: Improve function signature
2018-04-28 md5sum: Use AF_ALG when available
2018-04-28 sha512sum: Use AF_ALG when available
2018-04-28 sha256sum: Use AF_ALG when available
2018-04-28 sha1sum: Use AF_ALG when available
2018-05-05 all: Replace more http URLs by https URLs
2018-05-03 maint: port more modules to GCC 8
2018-05-03 Simplify code; drop support for Borland C++ on Windows
* admin/merge-gnulib (GNULIB_MODULES): Use crypto/md5-buffer
rather than crypto/md5, since Emacs doesn’t use the stream
operations that in recent Gnulib pull in other stuff Emacs doesn’t
need.  Similarly for crypto/sha1-buffer, crypto/sha256-buffer,
crypto/sha512-buffer.
* build-aux/config.guess, build-aux/config.sub, lib/dosname.h:
* lib/dup2.c, lib/errno.in.h, lib/euidaccess.c, lib/fcntl.c:
* lib/fcntl.in.h, lib/fpending.c, lib/fsync.c, lib/getdtablesize.c:
* lib/getopt.c, lib/gettimeofday.c, lib/inttypes.in.h, lib/md5.c:
* lib/md5.h, lib/open.c, lib/pipe2.c, lib/putenv.c, lib/sha1.c:
* lib/sha1.h, lib/sha256.c, lib/sha256.h, lib/sha512.c:
* lib/sha512.h, lib/stat-time.h, lib/stdio-impl.h, lib/stdio.in.h:
* lib/stdlib.in.h, lib/sys_stat.in.h, lib/sys_types.in.h:
* lib/timespec.h, lib/unistd.in.h, lib/utimens.c, m4/c-strtod.m4:
* m4/gnulib-common.m4, m4/inttypes.m4, m4/lstat.m4, m4/nocrash.m4:
* m4/pselect.m4, m4/readlink.m4, m4/stdio_h.m4, m4/symlink.m4:
* m4/unistd_h.m4, m4/utimens.m4:
Copy from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
2018-05-21 11:43:07 -07:00

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dnl Copyright (C) 2003-2018 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.
dnl serial 9
AC_DEFUN([gl_UTIMENS],
[
dnl Prerequisites of lib/utimens.c.
AC_REQUIRE([gl_FUNC_UTIMES])
AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CHECK_FUNCS_ONCE([futimes futimesat futimens utimensat lutimes])
if test $ac_cv_func_futimens = no && test $ac_cv_func_futimesat = yes; then
dnl FreeBSD 8.0-rc2 mishandles futimesat(fd,NULL,time). It is not
dnl standardized, but Solaris implemented it first and uses it as
dnl its only means to set fd time.
AC_CACHE_CHECK([whether futimesat handles NULL file],
[gl_cv_func_futimesat_works],
[touch conftest.file
AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <stddef.h>
#include <sys/times.h>
#include <fcntl.h>
]], [[ int fd = open ("conftest.file", O_RDWR);
if (fd < 0) return 1;
if (futimesat (fd, NULL, NULL)) return 2;
]])],
[gl_cv_func_futimesat_works=yes],
[gl_cv_func_futimesat_works=no],
[case "$host_os" in
# Guess yes on Linux systems.
linux-* | linux) gl_cv_func_futimesat_works="guessing yes" ;;
# Guess yes on glibc systems.
*-gnu*) gl_cv_func_futimesat_works="guessing yes" ;;
# If we don't know, assume the worst.
*) gl_cv_func_futimesat_works="guessing no" ;;
esac
])
rm -f conftest.file])
case "$gl_cv_func_futimesat_works" in
*yes) ;;
*)
AC_DEFINE([FUTIMESAT_NULL_BUG], [1],
[Define to 1 if futimesat mishandles a NULL file name.])
;;
esac
fi
])