Predefine __weak attribute when doing objective-c
rewriting for any target. (refixes radar 7530235).
llvm-svn: 93331
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 841463c..e4c380a 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -14,6 +14,7 @@
#include "clang/Frontend/Utils.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/FrontendOptions.h"
#include "clang/Frontend/PreprocessorOptions.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/FileManager.h"
@@ -202,6 +203,7 @@
static void InitializePredefinedMacros(const TargetInfo &TI,
const LangOptions &LangOpts,
+ const FrontendOptions &FEOpts,
MacroBuilder &Builder) {
// Compiler version introspection macros.
Builder.defineMacro("__llvm__"); // LLVM Backend
@@ -406,6 +408,8 @@
else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq)
Builder.defineMacro("__SSP_ALL__", "2");
+ if (FEOpts.ProgramAction == frontend::RewriteObjC)
+ Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
// Get other target #defines.
TI.getTargetDefines(LangOpts, Builder);
}
@@ -461,7 +465,8 @@
///
void clang::InitializePreprocessor(Preprocessor &PP,
const PreprocessorOptions &InitOpts,
- const HeaderSearchOptions &HSOpts) {
+ const HeaderSearchOptions &HSOpts,
+ const FrontendOptions &FEOpts) {
std::string PredefineBuffer;
PredefineBuffer.reserve(4080);
llvm::raw_string_ostream Predefines(PredefineBuffer);
@@ -475,7 +480,7 @@
// Install things like __POWERPC__, __GNUC__, etc into the macro table.
if (InitOpts.UsePredefines)
InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(),
- Builder);
+ FEOpts, Builder);
// Add on the predefines from the driver. Wrap in a #line directive to report
// that they come from the command line.