Since universal-parser and prism support, prelude code used functions
inaccessible from outside libruby shared library.
```
linking goruby
/usr/bin/ld: goruby.o: in function `prelude_eval':
/home/runner/work/ruby/ruby/build/golf_prelude.c:221: undefined reference to `rb_ruby_prism_ptr'
/usr/bin/ld: goruby.o: in function `pm_prelude_load':
/home/runner/work/ruby/ruby/build/golf_prelude.c:192: undefined reference to `pm_options_line_set'
/usr/bin/ld: /home/runner/work/ruby/ruby/build/golf_prelude.c:193: undefined reference to `pm_parse_string'
/usr/bin/ld: goruby.o: in function `prelude_eval':
/home/runner/work/ruby/ruby/build/golf_prelude.c:224: undefined reference to `pm_iseq_new_with_opt'
/usr/bin/ld: /home/runner/work/ruby/ruby/build/golf_prelude.c:226: undefined reference to `pm_parse_result_free'
/usr/bin/ld: goruby.o: in function `prelude_ast_value':
/home/runner/work/ruby/ruby/build/golf_prelude.c:181: undefined reference to `rb_ruby_ast_data_get'
/usr/bin/ld: goruby.o: in function `prelude_eval':
/home/runner/work/ruby/ruby/build/golf_prelude.c:231: undefined reference to `rb_ruby_ast_data_get'
/usr/bin/ld: goruby.o: in function `pm_prelude_load':
/home/runner/work/ruby/ruby/build/golf_prelude.c:196: undefined reference to `pm_parse_result_free'
collect2: error: ld returned 1 exit status
```
* goruby.c (init_golf): call Init_golf, because ruby_init_ext only
registers the function since r43514.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55993 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* goruby.c (goruby_options): check the result of `write(2)` to
suppress unused-result warning.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47128 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* goruby.c (goruby_run_node): run after ruby_init_loadpath() so that
require works, and protect the call.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14808 b2dd03c8-39d4-4d8f-98ff-823fe69b080e