build_config.rb

def gem_config(conf)
  #conf.gembox 'default'
  conf.gembox 'full-core'
  conf.gem :mgem => 'mruby-getopts'
  conf.gem :github => 'iij/mruby-io'
  conf.gem :github => 'iij/mruby-dir'
  conf.gem :github => 'iij/mruby-iijson'
  conf.gem :github => 'monochromegane/mruby-time-strftime'
  conf.gem :github => 'monochromegane/mruby-secure-random'

  # be sure to include this gem (the cli app)
  conf.gem File.expand_path(File.dirname(__FILE__))
end

MRuby::Build.new do |conf|
  toolchain :clang

  conf.enable_bintest
  conf.enable_debug
  conf.enable_test

  gem_config(conf)
end

# MRuby::Build.new('x86_64-pc-linux-gnu') do |conf|
#   toolchain :gcc

#   gem_config(conf)
# end

# MRuby::CrossBuild.new('i686-pc-linux-gnu') do |conf|
#   toolchain :gcc

#   [conf.cc, conf.cxx, conf.linker].each do |cc|
#     cc.flags << "-m32"
#   end

#   gem_config(conf)
# end

# MRuby::CrossBuild.new('x86_64-apple-darwin14') do |conf|
#   toolchain :clang

#   [conf.cc, conf.linker].each do |cc|
#     cc.command = 'x86_64-apple-darwin14-clang'
#   end
#   conf.cxx.command      = 'x86_64-apple-darwin14-clang++'
#   conf.archiver.command = 'x86_64-apple-darwin14-ar'

#   conf.build_target     = 'x86_64-pc-linux-gnu'
#   conf.host_target      = 'x86_64-apple-darwin14'

#   gem_config(conf)
# end

# MRuby::CrossBuild.new('i386-apple-darwin14') do |conf|
#   toolchain :clang

#   [conf.cc, conf.linker].each do |cc|
#     cc.command = 'i386-apple-darwin14-clang'
#   end
#   conf.cxx.command      = 'i386-apple-darwin14-clang++'
#   conf.archiver.command = 'i386-apple-darwin14-ar'

#   conf.build_target     = 'i386-pc-linux-gnu'
#   conf.host_target      = 'i386-apple-darwin14'

#   gem_config(conf)
# end

# MRuby::CrossBuild.new('x86_64-w64-mingw32') do |conf|
#   toolchain :gcc

#   [conf.cc, conf.linker].each do |cc|
#     cc.command = 'x86_64-w64-mingw32-gcc'
#   end
#   conf.cxx.command      = 'x86_64-w64-mingw32-cpp'
#   conf.archiver.command = 'x86_64-w64-mingw32-gcc-ar'
#   conf.exts.executable  = ".exe"

#   conf.build_target     = 'x86_64-pc-linux-gnu'
#   conf.host_target      = 'x86_64-w64-mingw32'

#   gem_config(conf)
# end

# MRuby::CrossBuild.new('i686-w64-mingw32') do |conf|
#   toolchain :gcc

#   [conf.cc, conf.linker].each do |cc|
#     cc.command = 'i686-w64-mingw32-gcc'
#   end
#   conf.cxx.command      = 'i686-w64-mingw32-cpp'
#   conf.archiver.command = 'i686-w64-mingw32-gcc-ar'
#   conf.exts.executable  = ".exe"

#   conf.build_target     = 'i686-pc-linux-gnu'
#   conf.host_target      = 'i686-w64-mingw32'

#   gem_config(conf)
# end