[libcxx-commits] [libcxxabi] [libc++abi] Fixing up LIBCXXABI_ADDITIONAL_COMPILE_FLAGS (PR #97608)

[Zibi Sarbinowski via libcxx-commits]

https://github.com/zibi2 created https://github.com/llvm/llvm-project/pull/97608

This is the continuation of #96112 which implements proposal from Louis.
Using PRIVATE option on target_compile_options() fixes the issue of propagating the option into lib++.

>From 3832b270c0ceed93147be1407c1da2e42b85a82e Mon Sep 17 00:00:00 2001
From: Zbigniew Sarbinowski <zibi at ca.ibm.com>
Date: Wed, 3 Jul 2024 17:15:06 +0000
Subject: [PATCH] Fixing up LIBCXXABI_ADDITIONAL_COMPILE_FLAGS

---
 libcxxabi/src/CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libcxxabi/src/CMakeLists.txt b/libcxxabi/src/CMakeLists.txt
index d6fcd72dcb1bd..c1a7bcb14eb19 100644
--- a/libcxxabi/src/CMakeLists.txt
+++ b/libcxxabi/src/CMakeLists.txt
@@ -182,7 +182,7 @@ set_target_properties(cxxabi_shared_objects
 if (CMAKE_POSITION_INDEPENDENT_CODE OR NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE)
   set_target_properties(cxxabi_shared_objects PROPERTIES POSITION_INDEPENDENT_CODE ON) # must set manually because it's an object library
 endif()
-target_compile_options(cxxabi_shared_objects PUBLIC "${LIBCXXABI_ADDITIONAL_COMPILE_FLAGS}")
+target_compile_options(cxxabi_shared_objects PRIVATE "${LIBCXXABI_ADDITIONAL_COMPILE_FLAGS}")
 
 if (LIBCXXABI_ENABLE_SHARED)
   add_library(cxxabi_shared SHARED)
@@ -262,7 +262,7 @@ set_target_properties(cxxabi_static_objects
     CXX_STANDARD_REQUIRED OFF # TODO: Make this REQUIRED once we don't need to accommodate the LLVM documentation builders using an ancient CMake
     COMPILE_FLAGS "${LIBCXXABI_COMPILE_FLAGS}"
 )
-target_compile_options(cxxabi_static_objects PUBLIC "${LIBCXXABI_ADDITIONAL_COMPILE_FLAGS}")
+target_compile_options(cxxabi_static_objects PRIVATE "${LIBCXXABI_ADDITIONAL_COMPILE_FLAGS}")
 
 if(LIBCXXABI_HERMETIC_STATIC_LIBRARY)
   target_add_compile_flags_if_supported(cxxabi_static_objects PRIVATE -fvisibility=hidden)