r282125 - [CMake] More robust handling for bootstrap variables

[Chris Bieneman via cfe-commits]

Author: cbieneman
Date: Wed Sep 21 19:18:12 2016
New Revision: 282125

URL: http://llvm.org/viewvc/llvm-project?rev=282125&view=rev
Log:
[CMake] More robust handling for bootstrap variables

Checking defined isn't good enough we also need to handle defined to empty string.

Modified:
    cfe/trunk/CMakeLists.txt

Modified: cfe/trunk/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/CMakeLists.txt?rev=282125&r1=282124&r2=282125&view=diff
==============================================================================
--- cfe/trunk/CMakeLists.txt (original)
+++ cfe/trunk/CMakeLists.txt Wed Sep 21 19:18:12 2016
@@ -611,7 +611,11 @@ if (CLANG_ENABLE_BOOTSTRAP)
   # Populate the passthrough variables
   foreach(variableName ${CLANG_BOOTSTRAP_PASSTHROUGH} ${_BOOTSTRAP_DEFAULT_PASSTHROUGH})
     if(DEFINED ${variableName})
-      string(REPLACE ";" "\;" value ${${variableName}})
+      if("${${variableName}}" STREQUAL "")
+        set(value "")
+      else()
+        string(REPLACE ";" "\;" value ${${variableName}})
+      endif()
       list(APPEND PASSTHROUGH_VARIABLES
         -D${variableName}=${value})
     endif()