Rename --jit to --mjit (#5248)

* Rename --jit to --mjit

[Feature #18349]

* Fix a few more --jit references

* Fix MJIT Actions

* More s/jit/mjit/ and re-introduce --disable-jit

* Update NEWS.md

* Fix test_bug_reporter_add

1 files changed, 7 insertions, 0 deletions

diff --git a/yjit.h b/yjit.h
index 357acdd4b4..6f66f59f01 100644
--- a/yjit.h
+++ b/yjit.h
@@ -15,6 +15,13 @@
 # define YJIT_STATS RUBY_DEBUG
 #endif
 
+// We generate x86 assembly and rely on mmap(2).
+#if defined(__x86_64__) && !defined(_WIN32)
+# define YJIT_SUPPORTED_P 1
+#else
+# define YJIT_SUPPORTED_P 0
+#endif
+
 struct rb_yjit_options {
     // Enable compilation with YJIT
     bool yjit_enabled;