7937fe1a17
This patch adds support for forced loading of archive members, similar to the behavior of the -all_load and -ObjC options in ld64. To enable this, the StaticLibraryDefinitionGenerator class constructors are extended with a VisitMember callback that is called on each member file in the archive at generator construction time. This callback can be used to unconditionally add the member file to a JITDylib at that point. To test this the llvm-jitlink utility is extended with -all_load (all platforms) and -ObjC (darwin only) options. Since we can't refer to symbols in the test objects directly (these would always cause the member to be linked in, even without the new flags) we instead test side-effects of force loading: execution of constructors and registration of Objective-C metadata. rdar://134446111
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