In apple-kext mode, use external linkage for explicit template instantiations
instead of internal linkage.
llvm-svn: 140030
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 19c3b06..917f4b7 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -400,7 +400,12 @@
// definition somewhere else, so we can use available_externally linkage.
if (Linkage == GVA_C99Inline)
return llvm::Function::AvailableExternallyLinkage;
-
+
+ // Note that Apple's kernel linker doesn't support symbol
+ // coalescing, so we need to avoid linkonce and weak linkages there.
+ // Normally, this means we just map to internal, but for explicit
+ // instantiations we'll map to external.
+
// In C++, the compiler has to emit a definition in every translation unit
// that references the function. We should use linkonce_odr because
// a) if all references in this translation unit are optimized away, we
@@ -419,7 +424,7 @@
if (Linkage == GVA_ExplicitTemplateInstantiation)
return !Context.getLangOptions().AppleKext
? llvm::Function::WeakODRLinkage
- : llvm::Function::InternalLinkage;
+ : llvm::Function::ExternalLinkage;
// Otherwise, we have strong external linkage.
assert(Linkage == GVA_StrongExternal);