Restrict BRPC_VALIDATE_GFLAG to global scope and namespace scope only (#2625)
diff --git a/src/brpc/reloadable_flags.h b/src/brpc/reloadable_flags.h
index bbe62f8..c451bde 100644
--- a/src/brpc/reloadable_flags.h
+++ b/src/brpc/reloadable_flags.h
@@ -35,9 +35,10 @@
// modify directly. To emphasize this, you have to write the validator by
// yourself and use GFLAGS_NS::GetCommandLineOption() to acess the flag.
#define BRPC_VALIDATE_GFLAG(flag, validate_fn) \
- const int register_FLAGS_ ## flag ## _dummy \
- __attribute__((__unused__)) = \
- ::brpc::RegisterFlagValidatorOrDie( \
+ namespace brpc_flags {} \
+ const int register_FLAGS_ ## flag ## _dummy \
+ __attribute__((__unused__)) = \
+ ::brpc::RegisterFlagValidatorOrDie( \
&FLAGS_##flag, (validate_fn))
