An upcoming commit will change how we choose to reference a dylib. Currently
dylibs are only given an LC_LOAD_DYLIB in the final image if an atom is used.
This is different from ld64 which adds the load command when the dylib is referenced
on the cmdline.
In order to change this behaviour, we need libSystem.yaml to actually contain a mach header
so that it is parsed as a dylib, instead of currently being parsed as a normalised file.
To get a mach header, we also require an arch, so now we have one libsystem per arch and
all the tests have been updated to choose the correct one.
llvm-svn: 278372
ld64 sets both S_ATTR_PURE_INSTRUCTIONS and S_ATTR_SOME_INSTRUCTIONS
on __TEXT, __text. We only had the S_ATTR_PURE_INSTRUCTIONS attribute.
rdar://problem/24495801
llvm-svn: 259744
Pete Cooper