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-rw-r--r--gcc/c-cppbuiltin.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c
index e201b05..86c3f9c 100644
--- a/gcc/c-cppbuiltin.c
+++ b/gcc/c-cppbuiltin.c
@@ -449,6 +449,8 @@ c_cpp_builtins (cpp_reader *pfile)
cpp_define (pfile, "__GXX_WEAK__=0");
if (warn_deprecated)
cpp_define (pfile, "__DEPRECATED");
+ if (flag_rtti)
+ cpp_define (pfile, "__GXX_RTTI");
if (cxx_dialect == cxx0x)
cpp_define (pfile, "__GXX_EXPERIMENTAL_CXX0X__");
}