1 files changed, 6 insertions, 7 deletions
diff --git a/tasks/mruby_build_commands.rake b/tasks/mruby_build_commands.rake
index 7b61b2dee..1d69fa54d 100644
--- a/tasks/mruby_build_commands.rake
+++ b/tasks/mruby_build_commands.rake
@@ -241,17 +241,16 @@ module MRuby
     def initialize(build)
       super
       @command = nil
-      @compile_options = "-B%{funcname} -o- -"
+      @compile_options = "-B%{funcname} -o-"
     end
 
     def run(out, infiles, funcname)
       @command ||= @build.mrbcfile
-      IO.popen("#{filename @command} #{@compile_options % {:funcname => funcname}}", 'r+') do |io|
-        [infiles].flatten.each do |f|
-          _pp "MRBC", f.relative_path, nil, :indent => 2
-          io.write IO.read(f)
-        end
-        io.close_write
+      infiles = [infiles].flatten
+      infiles.each do |f|
+        _pp "MRBC", f.relative_path, nil, :indent => 2
+      end
+      IO.popen("#{filename @command} #{@compile_options % {:funcname => funcname}} #{infiles.join(' ')}", 'r+') do |io|
         out.puts io.read
       end
     end