Author: Reid Kleckner
Date: 2020-03-02T10:59:51+01:00
New Revision: 6b16ce944fef5f3b30b7dcc001b3af478e038668

URL: 
https://github.com/llvm/llvm-project/commit/6b16ce944fef5f3b30b7dcc001b3af478e038668
DIFF: 
https://github.com/llvm/llvm-project/commit/6b16ce944fef5f3b30b7dcc001b3af478e038668.diff

LOG: Attempt to fix ZLIB CMake logic on Windows

CMake doesn't seem to like it when you regex search for "^".

(cherry picked from commit 1079c68aa0fdb14d270a31c0df49a2afc5ed2485)

Added: 
    

Modified: 
    llvm/lib/Support/CMakeLists.txt

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Support/CMakeLists.txt b/llvm/lib/Support/CMakeLists.txt
index e23f7989e774..5c656164e771 100644
--- a/llvm/lib/Support/CMakeLists.txt
+++ b/llvm/lib/Support/CMakeLists.txt
@@ -198,10 +198,12 @@ if(LLVM_ENABLE_ZLIB)
     get_property(zlib_library TARGET ZLIB::ZLIB PROPERTY LOCATION)
   endif()
   get_filename_component(zlib_library ${zlib_library} NAME)
-  if(zlib_library MATCHES 
"^${CMAKE_STATIC_LIBRARY_PREFIX}.*${CMAKE_STATIC_LIBRARY_SUFFIX}$")
+  if(CMAKE_STATIC_LIBRARY_PREFIX AND
+     zlib_library MATCHES 
"^${CMAKE_STATIC_LIBRARY_PREFIX}.*${CMAKE_STATIC_LIBRARY_SUFFIX}$")
     STRING(REGEX REPLACE "^${CMAKE_STATIC_LIBRARY_PREFIX}" "" zlib_library 
${zlib_library})
     STRING(REGEX REPLACE "${CMAKE_STATIC_LIBRARY_SUFFIX}$" "" zlib_library 
${zlib_library})
-  elseif(zlib_library MATCHES 
"^${CMAKE_SHARED_LIBRARY_PREFIX}.*${CMAKE_SHARED_LIBRARY_SUFFIX}$")
+  elseif(CMAKE_SHARED_LIBRARY_PREFIX AND
+         zlib_library MATCHES 
"^${CMAKE_SHARED_LIBRARY_PREFIX}.*${CMAKE_SHARED_LIBRARY_SUFFIX}$")
     STRING(REGEX REPLACE "^${CMAKE_SHARED_LIBRARY_PREFIX}" "" zlib_library 
${zlib_library})
     STRING(REGEX REPLACE "${CMAKE_SHARED_LIBRARY_SUFFIX}$" "" zlib_library 
${zlib_library})
   endif()


        
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