[libcxx] Fix gcc builds.
authorAsiri Rathnayake <asiri.rathnayake@arm.com>
Tue, 13 Sep 2016 09:32:32 +0000 (09:32 +0000)
committerAsiri Rathnayake <asiri.rathnayake@arm.com>
Tue, 13 Sep 2016 09:32:32 +0000 (09:32 +0000)
commitd547ac0df9ee094e1d93aae9a5dec72f030e2436
tree0ee7417f4aafab15c510114c88e78a7cb3be2ec1
parentf8199a736c683a9934d597031cd2c36139ab5c45
[libcxx] Fix gcc builds.

Step around a gcc pre-processor defect which causes it to fail to
parse the __has_include macro check.

llvm-svn: 281310
libcxx/include/__threading_support