Revert changes, add exclusion

Author: ahueck

cmake/modules/coverage-lcov.cmake

@@ -18,8 +18,11 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   # workaround lcov and clang --coverage have a version mismatch
   set(GCOV_TOOL --gcov-tool ${CMAKE_BINARY_DIR}/scripts/llvm-gcov.sh)
   # these autogenerated file in build/* causes error when using llvm-cov gcov (should be fine with gcc),
-  # finally, CallSite.h should not be measured (extracted from LLVM 10 code base)
-  set(GCOV_WORKAROUND --ignore-errors unused --rc branch_coverage=1 --rc derive_function_end_line=0 --exclude *mpi_interceptor_rt.c --exclude */Version.cpp)
+  set(GCOV_WORKAROUND --rc branch_coverage=1 --rc derive_function_end_line=0 --exclude *mpi_interceptor_rt.c --exclude */Version.cpp)
+  if(${LLVM_VERSION_MAJOR} GREATER_EQUAL 18)
+    # LCOV version dependent but suffices for Action CI
+    set(GCOV_WORKAROUND --erase-functions __cxx_global_var_init " ${GCOV_WORKAROUND}")
+  endif()
 endif()
 
 add_custom_target(