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b6be1ce644
This incorporates: 2020-02-22 fchmodat, lchmod: simplify 2020-02-22 lchmod: fix link error on Solaris 10 2020-02-22 use 'restrict' in all POSIX function declarations 2020-02-22 chmodat, chownat: new modules * lib/gnulib.mk.in: Regenerate. * lib/inttypes.in.h, lib/openat.h, lib/signal.in.h: * lib/stdio.in.h, lib/stdlib.in.h, lib/string.in.h: * lib/sys_stat.in.h, lib/time.in.h, lib/unistd.in.h, m4/inttypes.m4: * m4/signal_h.m4, m4/stdio_h.m4, m4/stdlib_h.m4, m4/string_h.m4: * m4/sys_socket_h.m4, m4/sys_stat_h.m4, m4/time_h.m4: * m4/unistd_h.m4: Copy from Gnulib.
86 lines
3.1 KiB
Plaintext
86 lines
3.1 KiB
Plaintext
# signal_h.m4 serial 19
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dnl Copyright (C) 2007-2020 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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AC_DEFUN([gl_SIGNAL_H],
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[
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AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
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AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T])
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gl_NEXT_HEADERS([signal.h])
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# AIX declares sig_atomic_t to already include volatile, and C89 compilers
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# then choke on 'volatile sig_atomic_t'. C99 requires that it compile.
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AC_CHECK_TYPE([volatile sig_atomic_t], [],
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[HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[
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#include <signal.h>
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]])
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dnl Ensure the type pid_t gets defined.
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AC_REQUIRE([AC_TYPE_PID_T])
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AC_REQUIRE([AC_TYPE_UID_T])
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dnl Persuade glibc <signal.h> to define sighandler_t.
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_TYPE([sighandler_t], [], [HAVE_SIGHANDLER_T=0], [[
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#include <signal.h>
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]])
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dnl Check for declarations of anything we want to poison if the
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dnl corresponding gnulib module is not in use.
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gl_WARN_ON_USE_PREPARE([[#include <signal.h>
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]], [pthread_sigmask sigaction
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sigaddset sigdelset sigemptyset sigfillset sigismember
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sigpending sigprocmask])
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AC_REQUIRE([AC_C_RESTRICT])
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])
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AC_DEFUN([gl_CHECK_TYPE_SIGSET_T],
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[
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AC_CHECK_TYPES([sigset_t],
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[gl_cv_type_sigset_t=yes], [gl_cv_type_sigset_t=no],
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[[
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#include <signal.h>
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/* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
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#include <sys/types.h>
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]])
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if test $gl_cv_type_sigset_t != yes; then
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HAVE_SIGSET_T=0
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fi
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])
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AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR],
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[
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dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
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gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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dnl Define it also as a C macro, for the benefit of the unit tests.
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gl_MODULE_INDICATOR_FOR_TESTS([$1])
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])
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AC_DEFUN([gl_SIGNAL_H_DEFAULTS],
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[
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GNULIB_PTHREAD_SIGMASK=0; AC_SUBST([GNULIB_PTHREAD_SIGMASK])
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GNULIB_RAISE=0; AC_SUBST([GNULIB_RAISE])
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GNULIB_SIGNAL_H_SIGPIPE=0; AC_SUBST([GNULIB_SIGNAL_H_SIGPIPE])
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GNULIB_SIGPROCMASK=0; AC_SUBST([GNULIB_SIGPROCMASK])
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GNULIB_SIGACTION=0; AC_SUBST([GNULIB_SIGACTION])
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dnl Assume proper GNU behavior unless another module says otherwise.
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HAVE_POSIX_SIGNALBLOCKING=1; AC_SUBST([HAVE_POSIX_SIGNALBLOCKING])
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HAVE_PTHREAD_SIGMASK=1; AC_SUBST([HAVE_PTHREAD_SIGMASK])
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HAVE_RAISE=1; AC_SUBST([HAVE_RAISE])
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HAVE_SIGSET_T=1; AC_SUBST([HAVE_SIGSET_T])
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HAVE_SIGINFO_T=1; AC_SUBST([HAVE_SIGINFO_T])
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HAVE_SIGACTION=1; AC_SUBST([HAVE_SIGACTION])
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HAVE_STRUCT_SIGACTION_SA_SIGACTION=1;
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AC_SUBST([HAVE_STRUCT_SIGACTION_SA_SIGACTION])
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HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=1;
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AC_SUBST([HAVE_TYPE_VOLATILE_SIG_ATOMIC_T])
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HAVE_SIGHANDLER_T=1; AC_SUBST([HAVE_SIGHANDLER_T])
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REPLACE_PTHREAD_SIGMASK=0; AC_SUBST([REPLACE_PTHREAD_SIGMASK])
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REPLACE_RAISE=0; AC_SUBST([REPLACE_RAISE])
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])
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