Ruby » Ruby master

Use RB_GNUC_EXTENSION_BLOCK instead of extension

• include/ruby/defines.h (RB_GNUC_EXTENSION, RB_GNUC_EXTENSION_BLOCK):
  macros for skipping extension on non-GCC compilers.
• eval_error.c (warn_print): use RB_GNUC_EXTENSION_BLOCK instead of
  extension because extension is a GNU extension.
  Fix compile error on Solaris 10 with Oracle Solaris Studio 12.x.
  [Bug #12397] [ruby-dev:49629].
• internal.h (rb_fstring_cstr, rb_fstring_enc_cstr): ditto
• include/ruby/encoding.h (rb_enc_str_new, rb_enc_str_new_cstr): ditto
• include/ruby/intern.h (rb_str_new, rb_str_new_cstr,
  rb_usascii_str_new, rb_utf8_str_new, rb_tainted_str_new_cstr,
  rb_usascii_str_new_cstr, rb_utf8_str_new_cstr,
  rb_external_str_new_cstr, rb_locale_str_new_cstr,
  rb_str_buf_new_cstr, rb_str_cat_cstr, rb_exc_new_cstr): ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55082 b2dd03c8-39d4-4d8f-98ff-823fe69b080e