[PATCH] D32595: CMakeLists: Don't set LLVM_MAIN_SRC_DIR when building stand-alone clang

[Tom Stellard via Phabricator via llvm-commits]

tstellar created this revision.

clang was using LLVM_MAIN_SRC_DIR to search for lit.py to use for
running clang's lit tests.  This was dangerous though, because
LLVM_MAIN_SRC_DIR was determined by using llvm-config --src-root
and this directory may have been modified since llvm-config was
built (e.g. User builds and install llvm trunk and then checks out the
release_40 branch in their source tree).


https://reviews.llvm.org/D32595

Files:
  CMakeLists.txt


Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -54,7 +54,6 @@
   set(LLVM_TOOLS_BINARY_DIR ${TOOLS_BINARY_DIR} CACHE PATH "Path to llvm/bin")
   set(LLVM_LIBRARY_DIR ${LIBRARY_DIR} CACHE PATH "Path to llvm/lib")
   set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
-  set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
 
   # Normalize LLVM_CMAKE_PATH. --cmakedir might contain backslashes.
   # CMake assumes slashes as PATH.
@@ -125,29 +124,11 @@
       set(LLVM_UTILS_PROVIDED ON)
     endif()
 
-    if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
-      # Note: path not really used, except for checking if lit was found
-      set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
-      if(NOT LLVM_UTILS_PROVIDED)
-        add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/FileCheck utils/FileCheck)
-        add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/count utils/count)
-        add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/not utils/not)
-        set(LLVM_UTILS_PROVIDED ON)
-        set(CLANG_TEST_DEPS FileCheck count not)
-      endif()
-      set(UNITTEST_DIR ${LLVM_MAIN_SRC_DIR}/utils/unittest)
-      if(EXISTS ${UNITTEST_DIR}/googletest/include/gtest/gtest.h
-          AND NOT EXISTS ${LLVM_LIBRARY_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}gtest${CMAKE_STATIC_LIBRARY_SUFFIX}
-          AND EXISTS ${UNITTEST_DIR}/CMakeLists.txt)
-        add_subdirectory(${UNITTEST_DIR} utils/unittest)
-      endif()
-    else()
-      # Seek installed Lit.
-      find_program(LLVM_LIT
-                   NAMES llvm-lit lit.py lit
-                   PATHS "${LLVM_MAIN_SRC_DIR}/utils/lit"
-                   DOC "Path to lit.py")
-    endif()
+    # Seek installed Lit.
+    find_program(LLVM_LIT
+                 NAMES llvm-lit lit.py lit
+                 PATHS "${LLVM_TOOLS_BINARY_DIR}"
+                 DOC "Path to lit.py")
 
     if(LLVM_LIT)
       # Define the default arguments to use with 'lit', and an option for the user
@@ -440,13 +421,7 @@
 
 
 if( CLANG_INCLUDE_TESTS )
-  if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include/gtest/gtest.h)
-    add_subdirectory(unittests)
-    list(APPEND CLANG_TEST_DEPS ClangUnitTests)
-    list(APPEND CLANG_TEST_PARAMS
-      clang_unit_site_config=${CMAKE_CURRENT_BINARY_DIR}/test/Unit/lit.site.cfg
-      )
-  endif()
+
   add_subdirectory(test)
 
   if(CLANG_BUILT_STANDALONE)
@@ -463,6 +438,14 @@
       DEPENDS ${LLVM_LIT_DEPENDS}
       ARGS ${LLVM_LIT_EXTRA_ARGS}
       )
+  else()
+    if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include/gtest/gtest.h)
+      add_subdirectory(unittests)
+      list(APPEND CLANG_TEST_DEPS ClangUnitTests)
+      list(APPEND CLANG_TEST_PARAMS
+        clang_unit_site_config=${CMAKE_CURRENT_BINARY_DIR}/test/Unit/lit.site.cfg
+        )
+    endif()
   endif()
   add_subdirectory(utils/perf-training)
 endif()


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