mini_racer/ext/mini_racer_extension/extconf.rb

require 'mkmf'
require 'libv8'

IS_DARWIN = RUBY_PLATFORM =~ /darwin/

have_library('pthread')
have_library('objc') if IS_DARWIN
$CPPFLAGS += " -Wall" unless $CPPFLAGS.split.include? "-Wall"
$CPPFLAGS += " -g" unless $CPPFLAGS.split.include? "-g"
$CPPFLAGS += " -rdynamic" unless $CPPFLAGS.split.include? "-rdynamic"
$CPPFLAGS += " -fPIC" unless $CPPFLAGS.split.include? "-rdynamic" or IS_DARWIN
$CPPFLAGS += " -std=c++0x"
$CPPFLAGS += " -fpermissive"

$CPPFLAGS += " -Wno-reserved-user-defined-literal" if IS_DARWIN

$LDFLAGS.insert(0, " -stdlib=libc++ ") if IS_DARWIN

if ENV['CXX']
  puts "SETTING CXX"
  CONFIG['CXX'] = ENV['CXX']
end

CXX11_TEST = <<EOS
#if __cplusplus <= 199711L
#   error A compiler that supports at least C++11 is required in order to compile this project.
#endif
EOS

`echo "#{CXX11_TEST}" | #{CONFIG['CXX']} -std=c++0x -x c++ -E -`
unless $?.success?
  warn <<EOS


WARNING: C++11 support is required for compiling mini_racer. Please make sure
you are using a compiler that supports at least C++11. Examples of such
compilers are GCC 4.7+ and Clang 3.2+.

If you are using Travis, consider either migrating your build to Ubuntu Trusty or
installing GCC 4.8. See mini_racer's README.md for more information.


EOS
end

CONFIG['LDSHARED'] = '$(CXX) -shared' unless IS_DARWIN
if CONFIG['warnflags']
  CONFIG['warnflags'].gsub!('-Wdeclaration-after-statement', '')
  CONFIG['warnflags'].gsub!('-Wimplicit-function-declaration', '')
end

if enable_config('debug')
  CONFIG['debugflags'] << ' -ggdb3 -O0'
end

Libv8.configure_makefile

create_makefile 'mini_racer_extension'