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, 9 insertions, 2 deletions

diff --git a/version.c b/version.c
index 36c2f05756..3215368e20 100644
--- a/version.c
+++ b/version.c
@@ -81,17 +81,24 @@ Init_version(void)
     rb_define_global_const("RUBY_ENGINE_VERSION", (1 ? version : MKSTR(version)));
 }
 
+#if USE_MJIT
+#define MJIT_OPTS_ON mjit_opts.on
+#else
+#define MJIT_OPTS_ON 0
+#endif
+
 void
 Init_ruby_description(void)
 {
     VALUE description;
 
-    if (mjit_opts.on) {
+    if (MJIT_OPTS_ON) {
         description = MKSTR(description_with_jit);
     }
     else {
         description = MKSTR(description);
     }
+
     /*
      * The full ruby version string, like <tt>ruby -v</tt> prints
      */
@@ -102,7 +109,7 @@ Init_ruby_description(void)
 void
 ruby_show_version(void)
 {
-    if (mjit_opts.on) {
+    if (MJIT_OPTS_ON) {
         PRINT(description_with_jit);
     }
     else {