Changeset 25054

Timestamp:

04/19/08 13:12:47 (7 months ago)

Author:

mmlr

Message:

Add the "-fno-tree-vrp" option when building with GCC4. It seems that the
value range propagation optimization results in broken code with the GCC4
version we are currently using. Added TODO to retest/remove this flag when we
update our GCC4 compiler.

Files:

• haiku/trunk/build/jam/BuildSetup (modified) (1 diff)

haiku/trunk/build/jam/BuildSetup

@@ -157 +157 @@
 }
 
-# disable strict aliasing on anything newer than gcc 2 as it may lead to unexpected results.
-# TODO: remove this when all code has been analyzed/fixed with regard to aliasing.
+# disable strict aliasing on anything newer than gcc 2 as it may lead to
+# unexpected results. also disable the tree-vrp (value range propagation)
+# optimization for now as with the current gcc4 version we are using this
+# results in some broken code.
+# TODO: remove the -fno-strict-aliasing option when all code has been
+#               analyzed/fixed with regard to aliasing.
+# TODO: retest/remove the -fno-tree-vrp option as soon as we have updated our
+#               gcc4 compiler.
 if $(HAIKU_GCC_VERSION[1]) >= 3 {
-        HAIKU_GCC_BASE_FLAGS += -fno-strict-aliasing ;
+        HAIKU_GCC_BASE_FLAGS += -fno-strict-aliasing -fno-tree-vrp ;
 }