Cleanup and add extras

extra/build_config.rb

@@ -0,0 +1,20 @@
+MRuby::Build.new do |conf|
+    toolchain :gcc
+    conf.gembox 'default'
+end
+
+MRuby::CrossBuild.new('wasm32-unknown-gnu') do |conf|
+    toolchain :clang
+  
+    conf.gembox 'default'
+    conf.gem :github => 'take-cheeze/mruby-marshal'
+    conf.gem :github => 'monochromegane/mruby-time-strftime'
+    conf.gem :core => 'mruby-eval'
+    conf.cc.command = 'emcc'
+    conf.cc.flags = %W(-O3 -g0)
+    conf.cxx.command = 'em++'
+    conf.cxx.flags = %W(-O3 -g0)
+  
+    conf.linker.command = 'emcc'
+    conf.archiver.command = 'emar'
+end

extra/make_mapping.sh

@@ -7,7 +7,13 @@ do
 
 filename="${file%.*}"
 fl="$(echo "$filename" | tr '[:upper:]' '[:lower:]')"
-md5=`md5sum "${file}" | awk '{ print $1 }'`
+
+if [ -f $file ]
+then
+    md5=`md5sum "${file}" | awk '{ print $1 }'`
+else
+    md5=''
+fi
 
 echo "\"$fl\": \"${file}?h=${md5}\"," >> mapping.js
 

extra/vm.c.patch

@@ -0,0 +1,19 @@
+--- src/vm.c	2020-10-18 23:00:12.865875587 +0530
++++ src/vm.c	2020-10-18 23:06:10.887618558 +0530
+@@ -2262,13 +2262,15 @@
+       switch (TYPES2(mrb_type(regs[a]),mrb_type(regs[a+1]))) {
+       case TYPES2(MRB_TT_FIXNUM,MRB_TT_FIXNUM):
+ #ifdef MRB_WITHOUT_FLOAT
++#else
+         {
+           mrb_int x = mrb_fixnum(regs[a]);
+           mrb_int y = mrb_fixnum(regs[a+1]);
+           SET_INT_VALUE(regs[a], y ? x / y : 0);
+         }
++        NEXT;
+         break;
+-#else
++
+         x = (mrb_float)mrb_fixnum(regs[a]);
+         y = (mrb_float)mrb_fixnum(regs[a+1]);
+         break;