[PATCH] D65045: [CMake] LLVM_EXTERNAL_<proj>_SOURCE_DIR should be adjustable.

[Yuanfang Chen via Phabricator via llvm-commits]

ychen updated this revision to Diff 210982.
ychen added a comment.

- Override LLVM_EXTERNAL_<proj>_SOURCE_DIR when it is empty.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D65045/new/

https://reviews.llvm.org/D65045

Files:
  llvm/CMakeLists.txt


Index: llvm/CMakeLists.txt
===================================================================
--- llvm/CMakeLists.txt
+++ llvm/CMakeLists.txt
@@ -95,7 +95,11 @@
       if(NOT EXISTS "${PROJ_DIR}" OR NOT IS_DIRECTORY "${PROJ_DIR}")
         message(FATAL_ERROR "LLVM_ENABLE_PROJECTS requests ${proj} but directory not found: ${PROJ_DIR}")
       endif()
-      set(LLVM_EXTERNAL_${upper_proj}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}" CACHE STRING "")
+      if( LLVM_EXTERNAL_${upper_proj}_SOURCE_DIR STREQUAL "" )
+        set(LLVM_EXTERNAL_${upper_proj}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}" CACHE PATH "" FORCE)
+      else()
+        set(LLVM_EXTERNAL_${upper_proj}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}" CACHE PATH "")
+      endif()
     elseif ("${proj}" IN_LIST LLVM_EXTERNAL_PROJECTS)
       message(STATUS "${proj} project is enabled")
       set(SHOULD_ENABLE_PROJECT TRUE)


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