Add CMAKE ASM workaround for newer clang (backport of #74696) (#75526)

dotnet · Sep 26, 2022 · 8770e0e · 8770e0e
1 parent 5247c8f
commit 8770e0e
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/eng/native/configurecompiler.cmake b/eng/native/configurecompiler.cmake
@@ -670,6 +670,13 @@ if (CLR_CMAKE_HOST_WIN32)
     endif()
 
 else (CLR_CMAKE_HOST_WIN32)
+    # This is a workaround for upstream issue: https://gitlab.kitware.com/cmake/cmake/-/issues/22995.
+    #
+    # In Clang.cmake, the decision to use single or double hyphen for target and gcc-toolchain
+    # is made based on CMAKE_${LANG}_COMPILER_VERSION, but CMAKE_ASM_COMPILER_VERSION is empty
+    # so it picks up single hyphen options, which new clang versions don't recognize.
+    set (CMAKE_ASM_COMPILER_VERSION "${CMAKE_C_COMPILER_VERSION}")
+
     enable_language(ASM)
 
 endif(CLR_CMAKE_HOST_WIN32)