[Openmp-commits] [clang] [openmp] [OFFLOAD] Build DeviceRTL with SPIRV backend (PR #174675)

[Nick Sarnie via Openmp-commits]

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@@ -74,8 +78,15 @@ target_include_directories(libompdevice PRIVATE
                            ${CMAKE_CURRENT_SOURCE_DIR}/../../libc
                            ${CMAKE_CURRENT_SOURCE_DIR}/../../offload/include)
 target_compile_options(libompdevice PRIVATE ${compile_options})
-target_link_options(libompdevice PRIVATE
-                    "-flto" "-r" "-nostdlib" "-Wl,--lto-emit-llvm")
+if(NOT "${LLVM_DEFAULT_TARGET_TRIPLE}" MATCHES "^spirv" AND
+   NOT "${CMAKE_CXX_COMPILER_TARGET}" MATCHES "^spirv")
+  target_link_options(libompdevice PRIVATE
+                  "-flto" "-r" "-nostdlib" "-Wl,--lto-emit-llvm")
+else()
+  target_link_options(libompdevice PRIVATE
+                  "-nostdlib" "-emit-llvm")
+endif()
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sarnex wrote:

The problem is currently SPIR-V uses an out of tree linker `spirv-link`, and nobody hooked up the driver to call `lld` instead of `spirv-link` if LTO is enabled. I will try to tackle that after I finish the couple of tasks I have now, but yeah right now LTO isn't hooked up.

https://github.com/llvm/llvm-project/pull/174675