[builtins] Don't always use -ffreestanding when compiling builtins
authorFrancis Ricci <francisjricci@gmail.com>
Tue, 23 Aug 2016 00:49:03 +0000 (00:49 +0000)
committerFrancis Ricci <francisjricci@gmail.com>
Tue, 23 Aug 2016 00:49:03 +0000 (00:49 +0000)
commitf9153eb3055c6b9287811c7e6d8ce6ad0d9fa6c1
tree843e0c6f65e963c12bcc90094b2bf6ec1ca74126
parentce2163459f3b18cd0cac87cb6f83f5b7f872b8a7
[builtins] Don't always use -ffreestanding when compiling builtins

This can break on some sysroots. Let the user define it if necessary.

llvm-svn: 279496
compiler-rt/lib/builtins/CMakeLists.txt