After some discussion, promote -fobjc-weak to a driver option.
rdar://problem/23415863
llvm-svn: 252187
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index d3276b9..03d4c6b 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -4816,6 +4816,23 @@
}
}
+ // Pass down -fobjc-weak or -fno-objc-weak if present.
+ if (types::isObjC(InputType)) {
+ auto WeakArg = Args.getLastArg(options::OPT_fobjc_weak,
+ options::OPT_fno_objc_weak);
+ if (!WeakArg) {
+ // nothing to do
+ } else if (GCArg) {
+ if (WeakArg->getOption().matches(options::OPT_fobjc_weak))
+ D.Diag(diag::err_objc_weak_with_gc);
+ } else if (!objcRuntime.allowsWeak()) {
+ if (WeakArg->getOption().matches(options::OPT_fobjc_weak))
+ D.Diag(diag::err_objc_weak_unsupported);
+ } else {
+ WeakArg->render(Args, CmdArgs);
+ }
+ }
+
if (Args.hasFlag(options::OPT_fapplication_extension,
options::OPT_fno_application_extension, false))
CmdArgs.push_back("-fapplication-extension");