mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-23 07:19:15 +00:00
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.
74 lines
2.4 KiB
Plaintext
74 lines
2.4 KiB
Plaintext
# pselect.m4 serial 9
|
|
dnl Copyright (C) 2011-2020 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_FUNC_PSELECT],
|
|
[
|
|
AC_REQUIRE([gl_HEADER_SYS_SELECT])
|
|
AC_REQUIRE([AC_C_RESTRICT])
|
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
|
AC_CHECK_FUNCS_ONCE([pselect])
|
|
|
|
if test $ac_cv_func_pselect = yes; then
|
|
AC_CACHE_CHECK([whether signature of pselect conforms to POSIX],
|
|
[gl_cv_sig_pselect],
|
|
[AC_LINK_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#include <sys/select.h>
|
|
]],
|
|
[[int (*p) (int, fd_set *, fd_set *, fd_set *restrict,
|
|
struct timespec const *restrict,
|
|
sigset_t const *restrict) = pselect;
|
|
return !p;]])],
|
|
[gl_cv_sig_pselect=yes],
|
|
[gl_cv_sig_pselect=no])])
|
|
|
|
dnl On FreeBSD 8.2, pselect() doesn't always reject bad fds.
|
|
AC_CACHE_CHECK([whether pselect detects invalid fds],
|
|
[gl_cv_func_pselect_detects_ebadf],
|
|
[
|
|
AC_RUN_IFELSE([AC_LANG_PROGRAM([[
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#if HAVE_SYS_SELECT_H
|
|
# include <sys/select.h>
|
|
#endif
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
]GL_MDA_DEFINES],
|
|
[[
|
|
fd_set set;
|
|
dup2(0, 16);
|
|
FD_ZERO(&set);
|
|
FD_SET(16, &set);
|
|
close(16);
|
|
struct timespec timeout;
|
|
timeout.tv_sec = 0;
|
|
timeout.tv_nsec = 5000;
|
|
return pselect (17, &set, NULL, NULL, &timeout, NULL) != -1 || errno != EBADF;
|
|
]])], [gl_cv_func_pselect_detects_ebadf=yes],
|
|
[gl_cv_func_pselect_detects_ebadf=no],
|
|
[
|
|
case "$host_os" in
|
|
# Guess yes on Linux systems.
|
|
linux-* | linux) gl_cv_func_pselect_detects_ebadf="guessing yes" ;;
|
|
# Guess yes on glibc systems.
|
|
*-gnu* | gnu*) gl_cv_func_pselect_detects_ebadf="guessing yes" ;;
|
|
# If we don't know, obey --enable-cross-guesses.
|
|
*) gl_cv_func_pselect_detects_ebadf="$gl_cross_guess_normal" ;;
|
|
esac
|
|
])
|
|
])
|
|
case $gl_cv_func_pselect_detects_ebadf in
|
|
*yes) ;;
|
|
*) REPLACE_PSELECT=1 ;;
|
|
esac
|
|
fi
|
|
|
|
if test $ac_cv_func_pselect = no || test $gl_cv_sig_pselect = no; then
|
|
REPLACE_PSELECT=1
|
|
fi
|
|
])
|