[llvm] 9ed9860 - [cmake] Check for empty LLVM_PTHREAD_LIB

[Stephen Neuendorffer via llvm-commits]

Author: Stephen Neuendorffer
Date: 2020-05-13T16:42:05-07:00
New Revision: 9ed9860d8774b364412ce50bf5d59a8eaee1adb7

URL: https://github.com/llvm/llvm-project/commit/9ed9860d8774b364412ce50bf5d59a8eaee1adb7
DIFF: https://github.com/llvm/llvm-project/commit/9ed9860d8774b364412ce50bf5d59a8eaee1adb7.diff

LOG: [cmake] Check for empty LLVM_PTHREAD_LIB

Windows builds broke because LLVM_THREAD_LIB is not set.

Added: 
    

Modified: 
    llvm/cmake/modules/AddLLVM.cmake

Removed: 
    


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diff  --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
index cbbe43806425..278f3fa8d49d 100644
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -484,8 +484,10 @@ function(llvm_add_library name)
         ${ARG_LINK_LIBS})
       foreach(link_lib ${LINK_LIBS_ARG_PUBLIC})
         # Can't specify a dependence on -lpthread
-        if(NOT ${link_lib} STREQUAL ${LLVM_PTHREAD_LIB})
-          add_dependencies(${obj_name} ${link_lib})
+        if(LLVM_PTHREAD_LIB)
+          if(NOT ${link_lib} STREQUAL ${LLVM_PTHREAD_LIB})
+            add_dependencies(${obj_name} ${link_lib})
+          endif()
         endif()
       endforeach()
     endif()