[libc++][test] <=> now has a feature-test macro
authorCasey Carter <Casey@Carter.net>
Sun, 13 Oct 2019 16:46:12 +0000 (16:46 +0000)
committerCasey Carter <Casey@Carter.net>
Sun, 13 Oct 2019 16:46:12 +0000 (16:46 +0000)
commit1f92d8b5449f6fd17360421e2e4da3fb7bff5c5a
tree856731c9642c2d769a7c2e66df88c29d9e28f92a
parentd0b8db9ab8c47286f5cf99702193daa8aec18298
[libc++][test] <=> now has a feature-test macro

...which `test/support/test_macros.h` can use to detect compiler support.

llvm-svn: 374722
libcxx/test/support/test_macros.h