From ab3953b0476a9502c9cd1c59317fa2e98ae301fc Mon Sep 17 00:00:00 2001
From: "Dmitry V. Levin" <ldv@altlinux.org>
Date: Sat, 8 Feb 2014 00:15:52 +0000
Subject: [PATCH] Check for SA_RESTORER definition in <asm/signal.h>

Kernel header <asm/signal.h> cannot be included from regular code
because it conflicts with libc headers, but SA_RESTORER is needed in
signal.c, so SA_RESTORER value is forwarded from <asm/signal.h> to
config.h using a configure check.

* configure.ac (ASM_SA_RESTORER): Define if SA_RESTORER is defined
in <asm/signal.h>.
---
 configure.ac | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/configure.ac b/configure.ac
index be28ebee..9b65d4b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -296,6 +296,16 @@ AC_CHECK_SIZEOF([long])
 AC_CHECK_SIZEOF([long long])
 AC_CHECK_SIZEOF([rlim_t],,[#include <sys/resource.h>])
 
+AC_CACHE_CHECK([for SA_RESTORER], [st_cv_sa_restorer],
+	       [st_cv_sa_restorer="$(echo SA_RESTORER |
+			$CPP $CPPFLAGS -P -imacros asm/signal.h - |
+			grep ^0x)"
+	        test -n "$st_cv_sa_restorer" || st_cv_sa_restorer=no])
+if test "x$st_cv_sa_restorer" != xno; then
+	AC_DEFINE_UNQUOTED([ASM_SA_RESTORER], [$st_cv_sa_restorer],
+			   [SA_RESTORER defined in <asm/signal.h>])
+fi
+
 AC_PATH_PROG([PERL], [perl])
 
 AC_CONFIG_FILES([Makefile tests/Makefile])
-- 
2.40.0