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-rw-r--r--gnulib-m4/signalblocking.m425
1 files changed, 25 insertions, 0 deletions
diff --git a/gnulib-m4/signalblocking.m4 b/gnulib-m4/signalblocking.m4
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+# signalblocking.m4 serial 14
+dnl Copyright (C) 2001-2002, 2006-2017 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.
+
+# Determine available signal blocking primitives. Three different APIs exist:
+# 1) POSIX: sigemptyset, sigaddset, sigprocmask
+# 2) SYSV: sighold, sigrelse
+# 3) BSD: sigblock, sigsetmask
+# For simplicity, here we check only for the POSIX signal blocking.
+AC_DEFUN([gl_SIGNALBLOCKING],
+[
+ AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+ AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T])
+ if test $gl_cv_type_sigset_t = yes; then
+ AC_CHECK_FUNC([sigprocmask], [gl_cv_func_sigprocmask=1])
+ fi
+ if test -z "$gl_cv_func_sigprocmask"; then
+ HAVE_POSIX_SIGNALBLOCKING=0
+ fi
+])
+
+# Prerequisites of lib/sigprocmask.c.
+AC_DEFUN([gl_PREREQ_SIGPROCMASK], [:])