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This incorporates: 2019-09-22 Update some URLs 2019-09-15 fcntl-h: fix compilation error of creat.c on MSVC 2019-09-15 creat: new module 2019-09-15 access: new module 2019-09-09 Add option to assume best, not worst, when cross-compiling. * build-aux/config.guess, build-aux/config.sub, doc/misc/texinfo.tex: * lib/careadlinkat.c, lib/careadlinkat.h, lib/count-leading-zeros.h: * lib/count-trailing-zeros.h, lib/diffseq.h, lib/fcntl.in.h: * lib/ftoastr.c, lib/get-permissions.c: * lib/ieee754.in.h, lib/inttypes.in.h, lib/mktime.c, lib/open.c: * lib/pathmax.h, lib/pipe2.c, lib/stddef.in.h, lib/stdint.in.h: * lib/stdlib.in.h, lib/str-two-way.h, lib/string.in.h, lib/time.in.h: * lib/timegm.c, lib/unistd.in.h, m4/canonicalize.m4: * m4/extern-inline.m4, m4/fcntl_h.m4, m4/fdopendir.m4: * m4/getgroups.m4, m4/getopt.m4, m4/gettimeofday.m4: * m4/gnulib-common.m4, m4/largefile.m4: * m4/lstat.m4, m4/memmem.m4, m4/mktime.m4, m4/nocrash.m4, m4/open.m4: * m4/pselect.m4, m4/putenv.m4, m4/readlink.m4, m4/regex.m4: * m4/symlink.m4, m4/unistd_h.m4, m4/utimens.m4, m4/utimes.m4: Copy from Gnulib. * lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate. * m4/open-slash.m4: New file, copied from Gnulib.
73 lines
2.4 KiB
Plaintext
73 lines
2.4 KiB
Plaintext
# pselect.m4 serial 8
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dnl Copyright (C) 2011-2019 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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AC_DEFUN([gl_FUNC_PSELECT],
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[
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AC_REQUIRE([gl_HEADER_SYS_SELECT])
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AC_REQUIRE([AC_C_RESTRICT])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CHECK_FUNCS_ONCE([pselect])
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if test $ac_cv_func_pselect = yes; then
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AC_CACHE_CHECK([whether signature of pselect conforms to POSIX],
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[gl_cv_sig_pselect],
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[AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <sys/select.h>
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]],
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[[int (*p) (int, fd_set *, fd_set *, fd_set *restrict,
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struct timespec const *restrict,
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sigset_t const *restrict) = pselect;
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return !p;]])],
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[gl_cv_sig_pselect=yes],
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[gl_cv_sig_pselect=no])])
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dnl On FreeBSD 8.2, pselect() doesn't always reject bad fds.
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AC_CACHE_CHECK([whether pselect detects invalid fds],
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[gl_cv_func_pselect_detects_ebadf],
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[
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AC_RUN_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/types.h>
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#include <sys/time.h>
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#if HAVE_SYS_SELECT_H
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# include <sys/select.h>
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#endif
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#include <unistd.h>
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#include <errno.h>
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]],[[
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fd_set set;
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dup2(0, 16);
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FD_ZERO(&set);
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FD_SET(16, &set);
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close(16);
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struct timespec timeout;
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timeout.tv_sec = 0;
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timeout.tv_nsec = 5000;
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return pselect (17, &set, NULL, NULL, &timeout, NULL) != -1 || errno != EBADF;
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]])], [gl_cv_func_pselect_detects_ebadf=yes],
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[gl_cv_func_pselect_detects_ebadf=no],
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[
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case "$host_os" in
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# Guess yes on Linux systems.
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linux-* | linux) gl_cv_func_pselect_detects_ebadf="guessing yes" ;;
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# Guess yes on glibc systems.
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*-gnu* | gnu*) gl_cv_func_pselect_detects_ebadf="guessing yes" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_pselect_detects_ebadf="$gl_cross_guess_normal" ;;
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esac
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])
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])
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case $gl_cv_func_pselect_detects_ebadf in
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*yes) ;;
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*) REPLACE_PSELECT=1 ;;
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esac
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fi
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if test $ac_cv_func_pselect = no || test $gl_cv_sig_pselect = no; then
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REPLACE_PSELECT=1
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fi
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])
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