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Author SHA1 Message Date
Peter Collingbourne 89061b2224 IR: Replace the "Linker Options" module flag with "llvm.linker.options" named metadata. 
The new metadata is easier to manipulate than module flags.

Differential Revision: https://reviews.llvm.org/D31349

llvm-svn: 305227
 2017-06-12 20:10:48 +00:00
Alex Lorenz a8fbef44fe [CodeGen] Emit a CoreFoundation link guard when @available is used 
After r297760, __isOSVersionAtLeast in compiler-rt loads the CoreFoundation
symbols at runtime. This means that `@available` will always fail when used in a
binary without a linked CoreFoundation.

This commit forces Clang to emit a reference to a CoreFoundation symbol when
`@available` is used to ensure that linking will fail when CoreFoundation isn't
linked with the build product.

rdar://31039592

Differential Revision: https://reviews.llvm.org/D30977

llvm-svn: 298588
 2017-03-23 11:14:27 +00:00