[runtimes] Use -Wunknown-pragmas for the pragma check
authorPetr Hosek <phosek@chromium.org>
Thu, 30 May 2019 05:38:06 +0000 (05:38 +0000)
committerPetr Hosek <phosek@chromium.org>
Thu, 30 May 2019 05:38:06 +0000 (05:38 +0000)
commitf1ddf431b5dd47a6c03ed1420af69facace8cb1d
tree82bf5a5cf21be79ba63bcfa689d14cb1b1d01dbb
parente4cfa89915b7e16a095272f6603a3df83b982d38
[runtimes] Use -Wunknown-pragmas for the pragma check

This is a follow up to r362055, we need -Wunknown-pragmas otherwise
the check is going to succeed it the pragma isn't supported.

llvm-svn: 362057
libcxx/cmake/config-ix.cmake
libcxxabi/cmake/config-ix.cmake
libunwind/cmake/config-ix.cmake