[CMake] Fix ability to use LLVM_ENABLE_PROJECTS with LLVM_EXTERNAL_PROJECTS

LLVM r353148, changed the circumstances in which the project source directory variables are created to only create them for LLVM projects. This patch initializes the directory variables for projects specified in `LLVM_EXTERNAL_PROJECTS` as well.

llvm-svn: 354060

diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index db35afc..418dfa8 100644 (file)
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -130,7 +130,7 @@ mark_as_advanced(LLVM_ENABLE_PROJECTS_USED)
 
 if (LLVM_ENABLE_PROJECTS_USED OR NOT LLVM_ENABLE_PROJECTS STREQUAL "")
   set(LLVM_ENABLE_PROJECTS_USED ON CACHE BOOL "" FORCE)
-  foreach(proj ${LLVM_ALL_PROJECTS})
+  foreach(proj ${LLVM_ALL_PROJECTS} ${LLVM_EXTERNAL_PROJECTS})
     string(TOUPPER "${proj}" upper_proj)
     string(REGEX REPLACE "-" "_" upper_proj ${upper_proj})
     if ("${proj}" IN_LIST LLVM_ENABLE_PROJECTS)