Don't enable YJIT by default. More tests on both Ubuntu and MacOS.

Add RUBY_YJIT_ENABLE env var and YJIT_FORCE_ENABLE compile-time constant.
Rename YJIT_STATS to RUBY_YJIT_STATS.

1 files changed, 6 insertions, 1 deletions

diff --git a/ruby.c b/ruby.c
index 6895838f5e..0476135d34 100644
--- a/ruby.c
+++ b/ruby.c
@@ -234,9 +234,14 @@ cmdline_options_init(ruby_cmdline_options_t *opt)
     opt->features.set = DEFAULT_FEATURES;
 #ifdef MJIT_FORCE_ENABLE /* to use with: ./configure cppflags="-DMJIT_FORCE_ENABLE" */
     opt->features.set |= FEATURE_BIT(jit);
-#else
+#elif defined(YJIT_FORCE_ENABLE)
     opt->features.set |= FEATURE_BIT(yjit);
 #endif
+
+    if(getenv("RUBY_YJIT_ENABLE")) {
+        opt->features.set |= FEATURE_BIT(yjit);
+    }
+
     return opt;
 }