From 207855cff9b4811004b9720f28a5bd0adf3784b7 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Tue, 29 Jun 2010 21:24:00 +0000 Subject: Introducing the "linker_weak" linkage type. This will be used for Objective-C metadata types which should be marked as "weak", but which the linker will remove upon final linkage. For example, the "objc_msgSend_fixup_alloc" symbol is defined like this: .globl l_objc_msgSend_fixup_alloc .weak_definition l_objc_msgSend_fixup_alloc .section __DATA, __objc_msgrefs, coalesced .align 3 l_objc_msgSend_fixup_alloc: .quad _objc_msgSend_fixup .quad L_OBJC_METH_VAR_NAME_1 This is different from the "linker_private" linkage type, because it can't have the metadata defined with ".weak_definition". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107205 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Linker/LinkModules.cpp | 3 +++ 1 file changed, 3 insertions(+) (limited to 'lib/Linker') diff --git a/lib/Linker/LinkModules.cpp b/lib/Linker/LinkModules.cpp index 8487c83..d741245 100644 --- a/lib/Linker/LinkModules.cpp +++ b/lib/Linker/LinkModules.cpp @@ -735,6 +735,9 @@ CalculateAliasLinkage(const GlobalValue *SGV, const GlobalValue *DGV) { else if (SL == GlobalValue::LinkerPrivateLinkage && DL == GlobalValue::LinkerPrivateLinkage) return GlobalValue::LinkerPrivateLinkage; + else if (SL == GlobalValue::LinkerWeakLinkage && + DL == GlobalValue::LinkerWeakLinkage) + return GlobalValue::LinkerWeakLinkage; else { assert (SL == GlobalValue::PrivateLinkage && DL == GlobalValue::PrivateLinkage && "Unexpected linkage type"); -- cgit v1.1