add disabling MJIT features option.

* configure.ac: introduce new configure option `--enable-mjit` and
  `--disable-mjit`. Default is "enable".
  `--disable-mjit` disables all of MJIT features so that `ruby --jit`
  can't enable MJIT.
  This option affect a macro `USE_MJIT`.
  This change remove `--enable/disable-install-mjit-header` option.

* Makefile.in: introduce the `ENABLE_MJIT` variable.

* common.mk: use `ENABLE_MJIT` option.

* internal.h: respect `USE_MJIT`. Same as other *.c, *.h.

* test/ruby/test_jit.rb: check `ENABLE_MJIT` key of rbconfg.rb.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65204 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/vm_core.h b/vm_core.h
index 444303173f..34217f7732 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -458,11 +458,13 @@ struct rb_iseq_constant_body {
     unsigned int ci_kw_size;
     unsigned int stack_max; /* for stack overflow check */
 
+#if USE_MJIT
     /* The following fields are MJIT related info.  */
     VALUE (*jit_func)(struct rb_execution_context_struct *,
                       struct rb_control_frame_struct *); /* function pointer for loaded native code */
     long unsigned total_calls; /* number of total calls with `mjit_exec()` */
     struct rb_mjit_unit *jit_unit;
+#endif
     char catch_except_p; /* If a frame of this ISeq may catch exception, set TRUE */
 };