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
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 @@
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");