[lldb] Include gtest in standalone build only if LLDB_INCLUDE_TESTS

[mgorny]

Summary

Build gtest targets when building standalone only if LLDB_INCLUDE_TESTS
is true. Prior to this change, they were built whenever
LLVM_MAIN_SRC_DIR was available, independently whether tests themselves
would be run.

[mgorny]

lldb/CMakeLists.txt

20

To be honest, I don't exactly like moving this option. The alternative I can think of is moving gtest and LLVMTestingSupport logic from LLDBStandalone into unittests.

[labath]

lldb/CMakeLists.txt

20

So, how does this work in non-standalone builds? Is gtest built unconditionally, or is it guarded by something else (LLVM_INCLUDE_TESTS perhaps?)

[mgorny]

lldb/CMakeLists.txt

20

It's guarded by LLVM_INCLUDE_UTILS + LLVM_INCLUDE_TESTS.

[labath]

lldb/CMakeLists.txt

20

Ok, I think that's fine. I'm not particularly upset by that. Doing this work in the unittest directory would probably be fine too...

[mgorny]

Thanks!

lldb/CMakeLists.txt

 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   project(lldb)
   set(LLDB_BUILT_STANDALONE TRUE)
 endif()
 
 # Must go below project(..)
 include(GNUInstallDirs)
 
+option(LLDB_INCLUDE_TESTS "Generate build targets for the LLDB unit tests." ${LLVM_INCLUDE_TESTS})
+
 if(LLDB_BUILT_STANDALONE)
   include(LLDBStandalone)
 
   set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
   set(CMAKE_CXX_STANDARD_REQUIRED YES)
   set(CMAKE_CXX_EXTENSIONS NO)
 endif()
 
if (LLDB_ENABLE_LUA)
   finish_swig_lua("lldb-lua" "${lldb_lua_bindings_dir}" "${lldb_lua_target_dir}")
 endif()
 
 set(LLDB_INCLUDE_UNITTESTS ON)
 if (NOT TARGET llvm_gtest)
   set(LLDB_INCLUDE_UNITTESTS OFF)
 endif()
 
-option(LLDB_INCLUDE_TESTS "Generate build targets for the LLDB unit tests." ${LLVM_INCLUDE_TESTS})
 if(LLDB_INCLUDE_TESTS)
   add_subdirectory(test)
   if (LLDB_INCLUDE_UNITTESTS)
     add_subdirectory(unittests)
   endif()
   add_subdirectory(utils)
 endif()
 
 if(LLDB_BUILT_STANDALONE AND NOT LLVM_ENABLE_IDE)
   llvm_distribution_add_targets()
 endif()

lldb/cmake/modules/LLDBStandalone.cmake

 set(LLVM_INCLUDE_TESTS ON CACHE INTERNAL "")
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 include_directories(
   "${CMAKE_BINARY_DIR}/include"
   "${LLVM_INCLUDE_DIRS}"
   "${CLANG_INCLUDE_DIRS}")
 
+if(LLDB_INCLUDE_TESTS)
   # Build the gtest library needed for unittests, if we have LLVM sources
   # handy.
   if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/unittest AND NOT TARGET llvm_gtest)
     add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/unittest utils/unittest)
   endif()
   # LLVMTestingSupport library is needed for Process/gdb-remote.
   if (EXISTS ${LLVM_MAIN_SRC_DIR}/lib/Testing/Support
       AND NOT TARGET LLVMTestingSupport)
     add_subdirectory(${LLVM_MAIN_SRC_DIR}/lib/Testing/Support
       lib/Testing/Support)
   endif()
+endif()
 
 option(LLVM_USE_FOLDERS "Enable solution folders in Visual Studio. Disable for Express versions." ON)
 if(LLVM_USE_FOLDERS)
   set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 endif()
 
 set_target_properties(clang-tablegen-targets PROPERTIES FOLDER "lldb misc")
 set_target_properties(intrinsics_gen PROPERTIES FOLDER "lldb misc")
 
 if(NOT DEFINED LLVM_COMMON_CMAKE_UTILS)
   set(LLVM_COMMON_CMAKE_UTILS ${CMAKE_CURRENT_SOURCE_DIR}/../cmake)
 endif()
 
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})