Enable -Wcast-qual for C++ files, where intentional qualifier-stripping can
be done with const_cast.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101798 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.rules b/Makefile.rules
index 9414f63..0c8469a 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -633,6 +633,8 @@
 endif
 CompileCommonOpts += -Wall -W -Wno-unused-parameter -Wwrite-strings \
                      $(EXTRA_OPTIONS)
+# Enable cast-qual for C++; the workaround is to use const_cast.
+CXX.Flags += -Wcast-qual
 
 ifeq ($(HOST_OS),HP-UX)
   CompileCommonOpts := -D_REENTRANT -D_HPUX_SOURCE