cmake HAVE_FFI_CALL_SRC examples

Lewuathe/mlir-hello thirdparty/llvm-project/llvm/cmake/modules/FindFFI.cmake :59

check_c_source_compiles("${HAVE_FFI_CALL_SRC}" HAVE_FFI_CALL)

Lewuathe/mlir-hello thirdparty/llvm-project/llvm/cmake/modules/FindFFI.cmake :62

check_cxx_source_compiles("${HAVE_FFI_CALL_SRC}" HAVE_FFI_CALL)

root-project/root interpreter/llvm-project/llvm/cmake/modules/FindFFI.cmake :59

check_c_source_compiles("${HAVE_FFI_CALL_SRC}" HAVE_FFI_CALL)

root-project/root interpreter/llvm-project/llvm/cmake/modules/FindFFI.cmake :62

check_cxx_source_compiles("${HAVE_FFI_CALL_SRC}" HAVE_FFI_CALL)