mingw doesn't seem to have support for -fstack-protector-all

configure.ac

@@ -1465,8 +1465,10 @@ if test x$enable_debug = xyes; then
 	CXXFLAGS="$CXXFLAGS -O0"
 	enable_spinlock_check=yes
 	if test x$GCC = xyes; then
-		CFLAGS="$CFLAGS -fstack-protector-all"
-		CXXFLAGS="$CXXFLAGS -fstack-protector-all"
+		if test x$starpu_windows != xyes ; then
+			CFLAGS="$CFLAGS -fstack-protector-all"
+			CXXFLAGS="$CXXFLAGS -fstack-protector-all"
+		fi
 		CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2"
 	fi
 else