[CMake] Don't cache LLVM_MAIN_SRC_DIR

petrhosek · petrhosek · commit d2f3882def8a · 2019-02-13T07:09:26.000Z
If we're not in a standalone build, this variable should be already set, so there's no need to set it again or to cache it. Differential Revision: https://reviews.llvm.org/D57993 llvm-svn: 353915
diff --git a/libunwind/CMakeLists.txt b/libunwind/CMakeLists.txt
@@ -115,7 +115,6 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
   set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
 else()
-  set(LLVM_MAIN_SRC_DIR "${CMAKE_SOURCE_DIR}" CACHE PATH "Path to LLVM source tree")
   set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py")
 endif()
 
