We need this otherwise the built code will assert when building dev-lang/rust
later. Not yet reported upstream.
--- a/src/trans/codegen_c.cpp
+++ b/src/trans/codegen_c.cpp
@@ -1274,6 +1274,7 @@ namespace {
                 {
                     args.push_back( a.c_str() );
                 }
+                args.push_back("-U_GLIBCXX_ASSERTIONS"); // TODO
                 args.push_back("-Wno-psabi");   // Suppress "note: the ABI for passing parameters with 128-byte alignment has changed in GCC 4.6"
                 switch(opt.opt_level)
                 {