[PATCH 05/11] Add -fno-rtti when building plugins.

[David Malcolm]

With the conversion of passes to C++ classes, plugins that add custom
passes must create them by creating their own derived classes of the
relevant subclass of opt_pass.  gcc itself is built with -fno-rtti,
hence there is no RTTI available for the opt_pass class hierarchy.

Hence plugins that create passes will need to be built with RTTI
disabled in order to link against gcc, or they will fail to load, with
an error like:
      cc1: error: cannot load plugin ./selfassign.so
      ./selfassign.so: undefined symbol: _ZTI8opt_pass
(aka "typeinfo for opt_pass").

gcc/testsuite

	* lib/plugin-support.exp (plugin-test-execute): Add -fno-rtti
	to optstr when building plugins.
---
 gcc/testsuite/lib/plugin-support.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/lib/plugin-support.exp b/gcc/testsuite/lib/plugin-support.exp
index 88033b3..017f3fd 100644
--- a/gcc/testsuite/lib/plugin-support.exp
+++ b/gcc/testsuite/lib/plugin-support.exp
@@ -104,7 +104,7 @@ proc plugin-test-execute { plugin_src plugin_tests } {
 	set optstr [concat $optstr "-DIN_GCC -fPIC -shared -undefined dynamic_lookup"]
     } else {
 	set plug_cflags $PLUGINCFLAGS 
-	set optstr "$includes $extra_flags -DIN_GCC -fPIC -shared"
+	set optstr "$includes $extra_flags -DIN_GCC -fPIC -shared -fno-rtti"
     }
 
     # Temporarily switch to the environment for the plugin compiler.
-- 
1.7.11.7