[compiler-rt] Let CMake search for thread support

This is an educated guess to fix sanitizer-x86_64-linux after r354132.

llvm-svn: 354143

diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
index 90192f7..a89ae7f 100644 (file)
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -120,6 +120,8 @@ check_library_exists(m pow "" COMPILER_RT_HAS_LIBM)
 check_library_exists(pthread pthread_create "" COMPILER_RT_HAS_LIBPTHREAD)
 check_library_exists(execinfo backtrace "" COMPILER_RT_HAS_LIBEXECINFO)
 
+find_package(Threads)
+
 # Look for terminfo library, used in unittests that depend on LLVMSupport.
 if(LLVM_ENABLE_TERMINFO)
   foreach(library terminfo tinfo curses ncurses ncursesw)