Add new specifiers/modifiers to format string of `mrb_vfromat()`

Format sequence syntax:

  %[modifier]specifier

Modifiers:

  ----------+------------------------------------------------------------
  Modifier  | Meaning
  ----------+------------------------------------------------------------
      !     | Convert to string by corresponding `inspect` instead of
            | corresponding `to_s`.
  ----------+------------------------------------------------------------

Specifiers:

  ----------+----------------+--------------------------------------------
  Specifier | Argument Type  | Note
  ----------+----------------+--------------------------------------------
      c     | char           |
     d,i    | mrb_int        |
      f     | mrb_float      |
      l     | char*, mrb_int | Arguments are string and length.
      n     | mrb_sym        |
      s     | char*          | Argument is NUL terminated string.
      t     | mrb_value      | Convert to type (class) of object.
     v,S    | mrb_value      |
      C     | struct RClass* |
      T     | mrb_value      | Convert to real type (class) of object.
      Y     | mrb_value      | Same as `!v` if argument is `true`, `false`
            |                | or `nil`, otherwise same as `T`.
      %     | -              | Convert to percent sign itself (no argument
            |                | taken).
  ----------+----------------+--------------------------------------------

This change will increase the binary size, but replacing all format strings
with new specifiers/modifiers will decrease the size because it reduces
inline expansion of `mrb_obj_value()`, etc. at the caller.

1 files changed, 4 insertions, 3 deletions

diff --git a/mrbgems/mruby-test/mrbgem.rake b/mrbgems/mruby-test/mrbgem.rake
index dcb7bb719..bf90e0791 100644
--- a/mrbgems/mruby-test/mrbgem.rake
+++ b/mrbgems/mruby-test/mrbgem.rake
@@ -15,8 +15,9 @@ MRuby::Gem::Specification.new('mruby-test') do |spec|
   mrbtest_lib = libfile("#{build_dir}/mrbtest")
   mrbtest_objs = []
 
-  driver_obj = objfile("#{build_dir}/driver")
-  # driver = "#{spec.dir}/driver.c"
+  driver_objs = Dir.glob("#{dir}/*.{c,cpp,cxx,cc,m,asm,s,S}").map do |f|
+    objfile(f.relative_path_from(dir).to_s.pathmap("#{build_dir}/%X"))
+  end
 
   assert_c = "#{build_dir}/assert.c"
   assert_rb = "#{MRUBY_ROOT}/test/assert.rb"
@@ -133,7 +134,7 @@ MRuby::Gem::Specification.new('mruby-test') do |spec|
   end
 
   unless build.build_mrbtest_lib_only?
-    file exec => [driver_obj, mlib, mrbtest_lib, build.libmruby_static] do |t|
+    file exec => [*driver_objs, mlib, mrbtest_lib, build.libmruby_static] do |t|
       gem_flags = build.gems.map { |g| g.linker.flags }
       gem_flags_before_libraries = build.gems.map { |g| g.linker.flags_before_libraries }
       gem_flags_after_libraries = build.gems.map { |g| g.linker.flags_after_libraries }