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-rw-r--r--gnulib/import/m4/signal_h.m483
1 files changed, 83 insertions, 0 deletions
diff --git a/gnulib/import/m4/signal_h.m4 b/gnulib/import/m4/signal_h.m4
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index 0000000..bcfd7b4
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+++ b/gnulib/import/m4/signal_h.m4
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+# signal_h.m4 serial 18
+dnl Copyright (C) 2007-2016 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_SIGNAL_H],
+[
+ AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+ AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T])
+ gl_NEXT_HEADERS([signal.h])
+
+# AIX declares sig_atomic_t to already include volatile, and C89 compilers
+# then choke on 'volatile sig_atomic_t'. C99 requires that it compile.
+ AC_CHECK_TYPE([volatile sig_atomic_t], [],
+ [HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[
+#include <signal.h>
+ ]])
+
+ dnl Ensure the type pid_t gets defined.
+ AC_REQUIRE([AC_TYPE_PID_T])
+
+ AC_REQUIRE([AC_TYPE_UID_T])
+
+ dnl Persuade glibc <signal.h> to define sighandler_t.
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_TYPE([sighandler_t], [], [HAVE_SIGHANDLER_T=0], [[
+#include <signal.h>
+ ]])
+
+ dnl Check for declarations of anything we want to poison if the
+ dnl corresponding gnulib module is not in use.
+ gl_WARN_ON_USE_PREPARE([[#include <signal.h>
+ ]], [pthread_sigmask sigaction
+ sigaddset sigdelset sigemptyset sigfillset sigismember
+ sigpending sigprocmask])
+])
+
+AC_DEFUN([gl_CHECK_TYPE_SIGSET_T],
+[
+ AC_CHECK_TYPES([sigset_t],
+ [gl_cv_type_sigset_t=yes], [gl_cv_type_sigset_t=no],
+ [[
+ #include <signal.h>
+ /* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
+ #include <sys/types.h>
+ ]])
+ if test $gl_cv_type_sigset_t != yes; then
+ HAVE_SIGSET_T=0
+ fi
+])
+
+AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR],
+[
+ dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+ AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+ gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+ dnl Define it also as a C macro, for the benefit of the unit tests.
+ gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+AC_DEFUN([gl_SIGNAL_H_DEFAULTS],
+[
+ GNULIB_PTHREAD_SIGMASK=0; AC_SUBST([GNULIB_PTHREAD_SIGMASK])
+ GNULIB_RAISE=0; AC_SUBST([GNULIB_RAISE])
+ GNULIB_SIGNAL_H_SIGPIPE=0; AC_SUBST([GNULIB_SIGNAL_H_SIGPIPE])
+ GNULIB_SIGPROCMASK=0; AC_SUBST([GNULIB_SIGPROCMASK])
+ GNULIB_SIGACTION=0; AC_SUBST([GNULIB_SIGACTION])
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ HAVE_POSIX_SIGNALBLOCKING=1; AC_SUBST([HAVE_POSIX_SIGNALBLOCKING])
+ HAVE_PTHREAD_SIGMASK=1; AC_SUBST([HAVE_PTHREAD_SIGMASK])
+ HAVE_RAISE=1; AC_SUBST([HAVE_RAISE])
+ HAVE_SIGSET_T=1; AC_SUBST([HAVE_SIGSET_T])
+ HAVE_SIGINFO_T=1; AC_SUBST([HAVE_SIGINFO_T])
+ HAVE_SIGACTION=1; AC_SUBST([HAVE_SIGACTION])
+ HAVE_STRUCT_SIGACTION_SA_SIGACTION=1;
+ AC_SUBST([HAVE_STRUCT_SIGACTION_SA_SIGACTION])
+ HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=1;
+ AC_SUBST([HAVE_TYPE_VOLATILE_SIG_ATOMIC_T])
+ HAVE_SIGHANDLER_T=1; AC_SUBST([HAVE_SIGHANDLER_T])
+ REPLACE_PTHREAD_SIGMASK=0; AC_SUBST([REPLACE_PTHREAD_SIGMASK])
+ REPLACE_RAISE=0; AC_SUBST([REPLACE_RAISE])
+])