[PATCH] D23742: cmake: Use system llvm-lit when lit.py does not exist in srcdir

[Michał Górny via llvm-commits]

mgorny created this revision.
mgorny added reviewers: garious, chapuni.
mgorny added a subscriber: llvm-commits.

Modify the add_lit_target function to use lit.py from LLVM_MAIN_SRC_DIR only when one does exist there, and otherwise fall back to looking for system install of llvm-lit. This is based on a similar conditional in clang's CMakeLists.txt, and makes it possible to run clang's tests when built separately from LLVM with no access to the original sources.


https://reviews.llvm.org/D23742

Files:
  cmake/modules/AddLLVM.cmake

Index: cmake/modules/AddLLVM.cmake
===================================================================
--- cmake/modules/AddLLVM.cmake
+++ cmake/modules/AddLLVM.cmake
@@ -1076,7 +1076,7 @@
   if (NOT CMAKE_CFG_INTDIR STREQUAL ".")
     list(APPEND LIT_ARGS --param build_mode=${CMAKE_CFG_INTDIR})
   endif ()
-  if (LLVM_MAIN_SRC_DIR)
+  if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
     set (LIT_COMMAND ${PYTHON_EXECUTABLE} ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
   else()
     find_program(LIT_COMMAND llvm-lit)


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