Add `target/host-m32.rb` to compile mruby in 32bit mode.
Tested only on Linux. You need to install 32bit relate libraries,
e.g. libc6-dev-i386.
ADD
target/host-m32.rb
+MRuby::Build.new do |conf|
+ # load specific toolchain settings
+ toolchain :gcc
+
+ # include the GEM box
+ conf.gembox 'full-core'
+
+ conf.cc.flags << '-m32'
+ conf.linker.flags << '-m32'
+
+ # Turn on `enable_debug` for better debugging
+ enable_debug
+ conf.enable_test
+end

Add `target/host-m32.rb` to compile mruby in 32bit mode.

Tested only on Linux. You need to install 32bit relate libraries,
e.g. libc6-dev-i386.