Allow building with CFLAGS="-O0"

If compiled with -O0, gcc doesn't do any stack frame coalescing and -Wframe-larger-than=1024 is triggered in debug mode. Starting with gcc 4.8, new opt level -Og is introduced for debugging, which does not trigger this warning. Issue openzfs#4799 Signed-off-by: Gvozden Neskovic <[email protected]>
ironMann · Jun 29, 2016 · a04593c · a04593c
1 parent 669cf0a
commit a04593c
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/module/zfs/vdev_raidz_math_scalar.c b/module/zfs/vdev_raidz_math_scalar.c
@@ -211,9 +211,20 @@ static const struct {
 
 #include "vdev_raidz_math_impl.h"
 
+/*
+ * If compiled with -O0, gcc doesn't do any stack frame coalescing
+ * and -Wframe-larger-than=1024 is triggered in debug mode.
+ * Starting with gcc 4.8, new opt level -Og is introduced for debugging, which
+ * does not trigger this warning.
+ */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wframe-larger-than="
+
 DEFINE_GEN_METHODS(scalar);
 DEFINE_REC_METHODS(scalar);
 
+#pragma GCC diagnostic pop
+
 static boolean_t
 raidz_will_scalar_work(void)
 {