[OpenMP] Add extra flags to libomptarget and plugin builds

[jdoerfert]

No description provided.

[llvmbot]

@llvm/pr-subscribers-openmp

Author: Johannes Doerfert (jdoerfert)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/74520.diff

2 Files Affected:

• (modified) openmp/libomptarget/plugins-nextgen/common/CMakeLists.txt (+16)
• (modified) openmp/libomptarget/src/CMakeLists.txt (+16)

diff --git a/openmp/libomptarget/plugins-nextgen/common/CMakeLists.txt b/openmp/libomptarget/plugins-nextgen/common/CMakeLists.txt
index 5b332ed3d2f41..7c349ffd2026f 100644
--- a/openmp/libomptarget/plugins-nextgen/common/CMakeLists.txt
+++ b/openmp/libomptarget/plugins-nextgen/common/CMakeLists.txt
@@ -88,6 +88,22 @@ target_compile_definitions(PluginCommon PRIVATE
   DEBUG_PREFIX="PluginInterface"
 )
 
+target_compile_options(PluginCommon PUBLIC -fno-exceptions)
+
+if(NOT LLVM_ENABLE_RTTI)
+	target_compile_options(PluginCommon PUBLIC -fno-rtti)
+endif()
+
+include(CheckIPOSupported)
+check_ipo_supported(RESULT use_lto OUTPUT output)
+if(use_lto)
+	target_compile_options(PluginCommon PUBLIC -flto)
+	target_link_options(PluginCommon PUBLIC -flto)
+else()
+       message(WARNING "LTO is not supported: ${output}")
+endif()
+
+
 target_include_directories(PluginCommon
   PRIVATE
   ${LIBOMPTARGET_INCLUDE_DIR}
diff --git a/openmp/libomptarget/src/CMakeLists.txt b/openmp/libomptarget/src/CMakeLists.txt
index 7c311f738ac8e..e907a1b25566b 100644
--- a/openmp/libomptarget/src/CMakeLists.txt
+++ b/openmp/libomptarget/src/CMakeLists.txt
@@ -55,6 +55,22 @@ target_compile_definitions(omptarget PRIVATE
   DEBUG_PREFIX="omptarget"
 )
 
+target_compile_options(omptarget PRIVATE -fno-exceptions)
+
+if(NOT LLVM_ENABLE_RTTI)
+  target_compile_options(omptarget PRIVATE -fno-rtti)
+endif()
+
+include(CheckIPOSupported)
+check_ipo_supported(RESULT use_lto OUTPUT output)
+if(use_lto)
+	target_compile_options(omptarget PUBLIC -flto)
+	target_link_options(omptarget PUBLIC -flto)
+else()
+       message(WARNING "LTO is not supported: ${output}")
+endif()
+
+
 # libomptarget.so needs to be aware of where the plugins live as they
 # are now separated in the build directory.
 set_target_properties(omptarget PROPERTIES