svn commit: samba r22974 - in branches/SAMBA_3_0/source: .

[idra at samba.org]

Author: idra
Date: 2007-05-17 18:20:16 +0000 (Thu, 17 May 2007)
New Revision: 22974

WebSVN: http://websvn.samba.org/cgi-bin/viewcvs.cgi?view=rev&root=samba&rev=22974

Log:
enable relro with PIE if available, this gives extra protection to the ELF segment
Modified:
   branches/SAMBA_3_0/source/configure.in


Changeset:
Modified: branches/SAMBA_3_0/source/configure.in
===================================================================
--- branches/SAMBA_3_0/source/configure.in	2007-05-17 13:56:19 UTC (rev 22973)
+++ branches/SAMBA_3_0/source/configure.in	2007-05-17 18:20:16 UTC (rev 22974)
@@ -1763,6 +1763,29 @@
 	fi
 fi
 
+#Check if we can enable relro as well
+if test x"${samba_cv_fpie}" = x"yes"
+then
+	AC_CACHE_CHECK(for relro, samba_cv_fpie_relro,
+	[
+		cat > conftest.c <<EOF
+int foo;
+main () { return 0;}
+EOF
+                if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fPIE -Wl,z,relro -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
+		then
+			samba_cv_fpie_relro=yes
+		else
+			samba_cv_fpie_relro=no
+		fi
+		rm -f conftest*
+	])
+	if test x"${samba_cv_fpie_relro}" = x"yes"
+	then
+		PIE_LDFLAGS="-pie -Wl,z,relro"
+	fi
+fi
+
 # Assume non-shared by default and override below
 BLDSHARED="false"