fake.rb.in: scan version.c

* template/fake.rb.in: scan MKSTR and MKINT from version.c and
  then extract the value for them from version.i.

* version.c (Init_version): use MKINT as the marker.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50833 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

template/fake.rb.in

@@ -8,8 +8,10 @@ end
 if arg['i']
   src = File.read(arg['i'])
   arg['versions'] = version = {}
-  src.scan(/rb_define_global_const\("(RUBY_\w+)",\s*(?:.*rb_\w*str_new\w*\s*\(\s*(\w+)|[\(\s]*\(\s*VALUE\s*\)\s*\((.+)\)\s*\)\s*<<\s?)/) do |n, s, i|
-    version[n] = i ? i.gsub(/\s+/, '').to_i : src[/\b#{s}\[\]\s*=\s*((?:"(?:\\.|[^\"\\])*"\s*)*);/m, 1].gsub(/\A"|"\s*\z|" *"/, '').gsub(/\\(.)/, '\1')
+  File.read(File.join(arg['srcdir'], 'version.c')).
+    scan(/rb_define_global_const\("(RUBY_\w+)",[^;]*?\bMK(?:INT|STR)\(([^()]*)\)/m) do |n, v|
+    version[n] =
+        eval(src[/\bruby_#{v}(?:\[\])?\s*=\s*((?:"(?:\\.|[^\"\\])*"\s*)*(?=;)|[^{};]+)/m, 1].gsub(/#/, '\\#'))
   end
 end
 %>baseruby="<%=arg['BASERUBY']%>"

version.c

@@ -19,6 +19,7 @@
 
 #define PRINT(type) puts(ruby_##type)
 #define MKSTR(type) rb_obj_freeze(rb_usascii_str_new_static(ruby_##type, sizeof(ruby_##type)-1))
+#define MKINT(name) INT2FIX(ruby_##name)
 
 const int ruby_api_version[] = {
     RUBY_API_VERSION_MAJOR,
@@ -38,6 +39,8 @@ VALUE ruby_engine_name = Qnil;
 void
 Init_version(void)
 {
+    enum {ruby_patchlevel = RUBY_PATCHLEVEL};
+    enum {ruby_revision = RUBY_REVISION};
     VALUE version;
     /*
      * The running version of ruby
@@ -55,11 +58,11 @@ Init_version(void)
      * The patchlevel for this ruby.  If this is a development build of ruby
      * the patchlevel will be -1
      */
-    rb_define_global_const("RUBY_PATCHLEVEL", INT2FIX(RUBY_PATCHLEVEL));
+    rb_define_global_const("RUBY_PATCHLEVEL", MKINT(patchlevel));
     /*
      * The SVN revision for this ruby.
      */
-    rb_define_global_const("RUBY_REVISION", INT2FIX(RUBY_REVISION));
+    rb_define_global_const("RUBY_REVISION", MKINT(revision));
     /*
      * The full ruby version string, like <tt>ruby -v</tt> prints'
      */