message(WARNING "LLDB test suite requires libc++ in llvm/projects/libcxx or an existing build symlinked to ${cxx_dir}")
endif()
else()
+ # We require libcxx for the test suite, so if we aren't building it,
+ # try to provide a helpful error about how to resolve the situation.
+ if(NOT TARGET cxx)
+ if(LLVM_ENABLE_PROJECTS STREQUAL "")
+ # If `LLVM_ENABLE_PROJECTS` is not being used (implying that we are
+ # using the old layout), suggest checking it out.
+ message(FATAL_ERROR
+ "LLDB test suite requires libc++, but it is currently disabled. "
+ "Please checkout `libcxx` in `llvm/projects` or disable tests "
+ "via `LLDB_INCLUDE_TESTS=OFF`.")
+ else()
+ # If `LLVM_ENABLE_PROJECTS` is being used, suggest adding it.
+ message(FATAL_ERROR
+ "LLDB test suite requires libc++, but it is currently disabled. "
+ "Please add `libcxx` to `LLVM_ENABLE_PROJECTS` or disable tests "
+ "via `LLDB_INCLUDE_TESTS=OFF`.")
+ endif()
+ endif()
list(APPEND LLDB_TEST_DEPS cxx)
endif()
endif()
LLVM, then you can pass LLVM-specific CMake variables to cmake when building
LLDB.
+If you are building both Clang and LLDB together, be sure to also add libc++,
+which is currently required for testing on macOS:
+
+::
+
+ > cmake -D LLVM_ENABLE_PROJECTS='clang;lldb;libcxx' $PATH_TO_LLVM -G Ninja
Here are some commonly used LLDB-specific CMake variables: