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-rw-r--r--src/cmd/gc/lex.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/cmd/gc/lex.c b/src/cmd/gc/lex.c
index b8252a225..6d8317747 100644
--- a/src/cmd/gc/lex.c
+++ b/src/cmd/gc/lex.c
@@ -312,6 +312,8 @@ main(int argc, char *argv[])
flagcount("u", "reject unsafe code", &safemode);
flagcount("v", "increase debug verbosity", &debug['v']);
flagcount("w", "debug type checking", &debug['w']);
+ use_writebarrier = 1;
+ flagcount("wb", "enable write barrier", &use_writebarrier);
flagcount("x", "debug lexer", &debug['x']);
flagcount("y", "debug declarations in canned imports (with -d)", &debug['y']);
if(thechar == '6')