diff --git a/build_config.rb b/build_config.rb
index db2fca6..2a3fc96 100644
--- a/build_config.rb
+++ b/build_config.rb
@@ -31,6 +31,28 @@ def gem_config(conf)
   gem_config(conf)
 end
 
+#MRuby::CrossBuild.new('x86_64-pc-linux-musl') do |conf|
+#  toolchain :gcc
+#
+#  [conf.cc, conf.linker].each do |cc|
+#    cc.command = 'musl-gcc'
+#    cc.flags = '-static -Os'
+#  end
+#
+#  gem_config(conf)
+#end
+
+#MRuby::CrossBuild.new('i686-pc-linux-musl') do |conf|
+#  toolchain :gcc
+#
+#  [conf.cc, conf.linker].each do |cc|
+#    cc.command = 'musl-gcc'
+#    cc.flags = '-static -Os -m32'
+#  end
+#
+#  gem_config(conf)
+#end
+
 MRuby::CrossBuild.new('x86_64-apple-darwin14') do |conf|
   toolchain :clang