Index: cmake/config-ix.cmake
===================================================================
--- cmake/config-ix.cmake
+++ cmake/config-ix.cmake
@@ -124,7 +124,11 @@
   set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
   set(THREADS_HAVE_PTHREAD_ARG Off)
   find_package(Threads REQUIRED)
-  set(LLVM_PTHREAD_LIB ${CMAKE_THREAD_LIBS_INIT})
+  if (LLVM_BUILD_STATIC)
+    set(LLVM_PTHREAD_LIB -Wl,--whole-archive ${CMAKE_THREAD_LIBS_INIT} -Wl,--no-whole-archive)
+  else()
+    set(LLVM_PTHREAD_LIB ${CMAKE_THREAD_LIBS_INIT})
+  endif()
 endif()
 
 # Don't look for these libraries on Windows. Also don't look for them if we're