class Object

# File lib/mkmf-rice.rb, line 10
def cpp_command(outfile, opt="")
  conf = cc_config(opt)
  if $universal and (arch_flag = conf['ARCH_FLAG']) and !arch_flag.empty?
    conf['ARCH_FLAG'] = arch_flag.gsub(/(?:\G|\s)-arch\s+\S+/, '')
  end
  RbConfig::expand("$(CXX) -E #$INCFLAGS #$CPPFLAGS #$CFLAGS #{opt} #{CONFTEST_CXX} #{outfile}",
                   conf)
end

# File lib/mkmf-rice.rb, line 69
def have_libffi
  # Check for libffi to support C style callacks.
  libffi_usable = system_libffi_usable?
  $CPPFLAGS += " -DHAVE_LIBFFI" if libffi_usable
  libffi_usable
end

# File lib/mkmf-rice.rb, line 47
def system_libffi_usable?
  # We need pkg_config or ffi.h
  libffi_ok = pkg_config("libffi") ||
      have_header("ffi.h") ||
      find_header("ffi.h", "/usr/local/include", "/usr/include/ffi",
                  "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi",
                  "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/ffi") ||
      (find_header("ffi.h", `xcrun --sdk macosx --show-sdk-path`.strip + "/usr/include/ffi") rescue false)

  # Ensure we can link to ffi_prep_closure_loc
  libffi_ok &&= have_library("ffi", "ffi_prep_closure_loc", [ "ffi.h" ]) ||
                have_library("libffi", "ffi_prep_closure_loc", [ "ffi.h" ]) ||
                have_library("libffi-8", "ffi_prep_closure_loc", [ "ffi.h" ])

  if RbConfig::CONFIG['host_os'] =~ /mswin/
    have_library('libffi_convenience')
    have_library('shlwapi')
  end

  libffi_ok
end