[compiler-rt][CMake] Set project for the custom libc++
This is another follow up to r354212 which is broken on Darwin when
cross-compiling runtimes to Linux when it ignores the -fuse-ld=lld
linker flag and attempts to use the host linker when performing the
compiler identification. Upon investigation, I noticed that setting
the project with appropriate list of languages makes the error go
away and it shouldn't hurt either.
Differential Revision: https://reviews.llvm.org/D58372
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@354350 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/Modules/CustomLibcxx/CMakeLists.txt b/cmake/Modules/CustomLibcxx/CMakeLists.txt
index c644dc2..683b88e 100644
--- a/cmake/Modules/CustomLibcxx/CMakeLists.txt
+++ b/cmake/Modules/CustomLibcxx/CMakeLists.txt
@@ -1,4 +1,5 @@
cmake_minimum_required(VERSION 3.4.3)
+project(custom-libcxx C CXX)
# Build static libcxxabi.
set(LIBCXXABI_STANDALONE_BUILD 1)
