Add Support to build loadable modules defined in mrbgems.

Rakefile

@@ -48,6 +48,30 @@ depfiles = MRuby.targets['host'].bins.map do |bin|
   install_path
 end
 
+MRuby.each_target do
+  gems.map do | gem |
+    current_dir = gem.dir.relative_path_from(Dir.pwd)
+    relative_from_root = gem.dir.relative_path_from(MRUBY_ROOT)
+    current_build_dir = "#{build_dir}/#{relative_from_root}"
+
+    gem.bins.each do | bin |
+      exec = exefile("#{build_dir}/bin/#{bin}")
+      objs = Dir.glob("#{current_dir}/tool/#{bin}/*.c").map { |f| objfile(f.pathmap("#{current_build_dir}/tool/#{bin}/%n")) }
+
+      file exec => objs + [libfile("#{build_dir}/lib/libmruby")] do |t|
+        gem_flags = gems.map { |g| g.linker.flags }
+        gem_flags_before_libraries = gems.map { |g| g.linker.flags_before_libraries }
+        gem_flags_after_libraries = gems.map { |g| g.linker.flags_after_libraries }
+        gem_libraries = gems.map { |g| g.linker.libraries }
+        gem_library_paths = gems.map { |g| g.linker.library_paths }
+        linker.run t.name, t.prerequisites, gem_libraries, gem_library_paths, gem_flags, gem_flags_before_libraries
+      end
+
+      depfiles += [ exec ]
+    end
+  end
+end
+
 depfiles += MRuby.targets.reject { |n, t| n == 'host' }.map { |n, t|
   [t.libfile("#{t.build_dir}/lib/libmruby")] + t.bins.map { |bin| t.exefile("#{t.build_dir}/bin/#{bin}") }
 }.flatten

tasks/mrbgem_spec.rake

@@ -28,6 +28,9 @@ module MRuby
       attr_accessor :test_objs, :test_rbfiles, :test_args
       attr_accessor :test_preload
 
+      attr_accessor :bins
+      alias :bin= :bins=
+
       attr_block MRuby::Build::COMMANDS
 
       def initialize(name, &block)
@@ -59,6 +62,8 @@ module MRuby
         @test_preload = 'test/assert.rb'
         @test_args = {}
 
+        @bins = []
+
         instance_eval(&@initializer)
 
         if !name || !licenses || !authors

tasks/mruby_build.rake

@@ -174,8 +174,9 @@ module MRuby
       puts "         Binaries: #{@bins.join(', ')}" unless @bins.empty?
       unless @gems.empty?
         puts "    Included Gems:"
-        @gems.map(&:name).each do |name|
-          puts "             #{name}"
+        @gems.map do |gem|
+          puts "             #{gem.name}"
+          puts "               - Binaries: #{gem.bins.join(', ')}" unless gem.bins.empty?
         end
       end
       puts "================================================"