[PATCH] CMake: use llvm-config to find llvm-tblgen

[Chandler Carruth]

  Looks good with one variable name fix.


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Comment at: CMakeLists.txt:51
@@ -48,7 +50,3 @@
 
-  if( EXISTS "${CLANG_PATH_TO_LLVM_BUILD}/bin/llvm-tblgen${CMAKE_EXECUTABLE_SUFFIX}" )
-    set(LLVM_TABLEGEN_EXE "${PATH_TO_LLVM_BUILD}/bin/llvm-tblgen${CMAKE_EXECUTABLE_SUFFIX}")
-  else()
-    # FIXME: This is an utter hack.
-    set(LLVM_TABLEGEN_EXE "${PATH_TO_LLVM_BUILD}/bin/Debug/llvm-tblgen${CMAKE_EXECUTABLE_SUFFIX}")
-  endif()
+  exec_program("${PATH_TO_LLVM_CONFIG} --obj-root" OUTPUT_VARIABLE LLVM_TABLEGEN_EXE)
+  set(LLVM_TABLEGEN_EXE "${LLVM_TABLEGEN_EXE}/bin/llvm-tblgen${CMAKE_EXECUTABLE_SUFFIX}")
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The output variable name doesn't make a lot of sense to me here... Why not LLVM_OBJ_ROOT or however it's spelled in this cmake area?


http://llvm-reviews.chandlerc.com/D1483