cmake HAVE_LIBPFM examples

Lewuathe/mlir-hello thirdparty/llvm-project/third-party/benchmark/src/CMakeLists.txt :41 

target_compile_definitions(benchmark PRIVATE -DHAVE_LIBPFM)

google/filament third_party/dawn/third_party/google_benchmark/src/src/CMakeLists.txt :41 

target_compile_definitions(benchmark PRIVATE -DHAVE_LIBPFM)

vengi-voxel/vengi contrib/libs/benchmark/src/CMakeLists.txt :41 

target_compile_definitions(benchmark PRIVATE -DHAVE_LIBPFM)