cmake: fix error message on non-Windows platform
authorAdam Simpkins <simpkins@fb.com>
Fri, 12 Jan 2018 02:24:07 +0000 (18:24 -0800)
committerFacebook Github Bot <facebook-github-bot@users.noreply.github.com>
Fri, 12 Jan 2018 02:35:37 +0000 (18:35 -0800)
commitab21322d7285494f5c4609b3b549fe707a1c54e7
tree7b6745d01df6d9d91c70ef1bffa6b20e4f249b65
parentb1fe65ff984c0bee2ea0dcdb4aded475b5463315
cmake: fix error message on non-Windows platform

Summary:
Building folly with cmake is only supported on Windows for now.  This fixes
cmake on non-Windows platforms to fail with a helpful message telling people to
use autoconf.  This message was in place before, but was after an MSVC version
check preventing it from appearing.

Reviewed By: meyering

Differential Revision: D6707328

fbshipit-source-id: a28a07ab0da41d605b11d93bba40f33520c5f57e
CMakeLists.txt