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-rw-r--r--m4/sigaction.m440
1 files changed, 40 insertions, 0 deletions
diff --git a/m4/sigaction.m4 b/m4/sigaction.m4
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+++ b/m4/sigaction.m4
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+# sigaction.m4 serial 7
+dnl Copyright (C) 2008-2022 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 if sigaction interface is present.
+AC_DEFUN([gl_SIGACTION],
+[
+ AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+ AC_CHECK_FUNCS_ONCE([sigaction])
+ if test $ac_cv_func_sigaction = yes; then
+ AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], , ,
+ [[#include <signal.h>]])
+ if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then
+ HAVE_STRUCT_SIGACTION_SA_SIGACTION=0
+ fi
+ else
+ HAVE_SIGACTION=0
+ fi
+])
+
+# Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c.
+AC_DEFUN([gl_PREREQ_SIGACTION],
+[
+ AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+ AC_REQUIRE([AC_C_RESTRICT])
+ AC_REQUIRE([AC_TYPE_UID_T])
+ AC_REQUIRE([gl_PREREQ_SIG_HANDLER_H])
+ AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
+ AC_CHECK_TYPES([siginfo_t], [], [], [[
+#include <signal.h>
+ ]])
+ if test $ac_cv_type_siginfo_t = no; then
+ HAVE_SIGINFO_T=0
+ fi
+])
+
+# Prerequisites of lib/sig-handler.h.
+AC_DEFUN([gl_PREREQ_SIG_HANDLER_H], [:])