Now checks whether g++ option -fno-ipa-sra is available before adding it.

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/branches/0.3@1516 bfdf4180-ca20-0410-9c96-a3a8aa849046

qelectrotech.pro

@@ -157,6 +157,10 @@ macx {
 }
 
 # Compilers-specific options
-*-g++* {
+unix {
+	*-g++* {
+		system(g++ -v --help 2>&1 | grep -q fipa-sra) {
 			QMAKE_CXXFLAGS += -fno-ipa-sra
+		}
+	}
 }