[clang] Disable LTO and LLD on SystemZ for stage3 builds
LLD does not support SystemZ, so it doesn't make sense to use it for
boostrap/stage3 builds, and using LTO in these cases won't work.
Differential Revision: https://reviews.llvm.org/D89942
diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index 7af05c3..aa38110 100644
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -640,6 +640,11 @@
set(BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${NEXT_CLANG_STAGE}-bins/)
if(BOOTSTRAP_LLVM_ENABLE_LLD)
+ # adding lld to clang-bootstrap-deps without having it enabled in
+ # LLVM_ENABLE_PROJECTS just generates a cryptic error message.
+ if (NOT "lld" IN_LIST LLVM_ENABLE_PROJECTS)
+ message(FATAL_ERROR "LLD is enabled in the boostrap build, but lld is not in LLVM_ENABLE_PROJECTS")
+ endif()
add_dependencies(clang-bootstrap-deps lld)
endif()
