https://git.ruby-lang.org/ruby.git/commit/?id=726bdd4d35

From 726bdd4d35861f0373d7508ab4ac7b2c781edf51 Mon Sep 17 00:00:00 2001
From: Alan Wu <XrXr@u...>
Date: Mon, 5 Oct 2020 06:56:33 -0400
Subject: Show whether MicroJIT is enabled in the version string

---
 ruby.c    |  4 ++--
 version.c | 31 +++++++++++++++++++++++++++----
 2 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/ruby.c b/ruby.c
index 97498e4ef4..a2e3ae8058 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1803,6 +1803,8 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt) https://github.com/ruby/ruby/blob/trunk/ruby.c#L1803
          */
         rb_warning("-K is specified; it is for 1.8 compatibility and may cause odd behavior");
 
+    if (opt->features.set & FEATURE_BIT(ujit))
+        rb_ujit_init();
 #if USE_MJIT
     if (opt->features.set & FEATURE_BIT(jit)) {
         opt->mjit.on = TRUE; /* set mjit.on for ruby_show_version() API and check to call mjit_init() */
@@ -1869,8 +1871,6 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt) https://github.com/ruby/ruby/blob/trunk/ruby.c#L1871
         /* Using TMP_RUBY_PREFIX created by ruby_init_loadpath(). */
         mjit_init(&opt->mjit);
 #endif
-    if (opt->features.set & FEATURE_BIT(ujit))
-        rb_ujit_init();
 
     Init_ruby_description();
     Init_enc();
diff --git a/version.c b/version.c
index 49738211a4..0a0bcc01cd 100644
--- a/version.c
+++ b/version.c
@@ -13,6 +13,7 @@ https://github.com/ruby/ruby/blob/trunk/version.c#L13
 #include "version.h"
 #include "vm_core.h"
 #include "mjit.h"
+#include "ujit_compile.h"
 #include <stdio.h>
 
 #ifndef EXIT_SUCCESS
@@ -41,7 +42,9 @@ const char ruby_release_date[] = RUBY_RELEASE_DATE; https://github.com/ruby/ruby/blob/trunk/version.c#L42
 const char ruby_platform[] = RUBY_PLATFORM;
 const int ruby_patchlevel = RUBY_PATCHLEVEL;
 const char ruby_description[] = RUBY_DESCRIPTION_WITH("");
+const char ruby_description_with_ujit[] = RUBY_DESCRIPTION_WITH(" +UJIT");
 static const char ruby_description_with_jit[] = RUBY_DESCRIPTION_WITH(" +JIT");
+static const char ruby_description_with_both_jits[] = RUBY_DESCRIPTION_WITH(" +JIT +UJIT");
 const char ruby_copyright[] = RUBY_COPYRIGHT;
 const char ruby_engine[] = "ruby";
 
@@ -102,10 +105,20 @@ Init_ruby_description(void) https://github.com/ruby/ruby/blob/trunk/version.c#L105
     VALUE description;
 
     if (MJIT_OPTS_ON) {
-        description = MKSTR(description_with_jit);
+        if (rb_ujit_enabled_p()) {
+            description = MKSTR(description_with_both_jits);
+        }
+        else {
+            description = MKSTR(description_with_jit);
+        }
     }
     else {
-        description = MKSTR(description);
+        if (rb_ujit_enabled_p()) {
+            description = MKSTR(description_with_ujit);
+        }
+        else {
+            description = MKSTR(description);
+        }
     }
 
     /*
@@ -118,10 +131,20 @@ void https://github.com/ruby/ruby/blob/trunk/version.c#L131
 ruby_show_version(void)
 {
     if (MJIT_OPTS_ON) {
-        PRINT(description_with_jit);
+        if (rb_ujit_enabled_p()) {
+            PRINT(description_with_both_jits);
+        }
+        else {
+            PRINT(description_with_jit);
+        }
     }
     else {
-        PRINT(description);
+        if (rb_ujit_enabled_p()) {
+            PRINT(description_with_ujit);
+        }
+        else {
+            PRINT(description);
+        }
     }
 #ifdef RUBY_LAST_COMMIT_TITLE
     fputs("last_commit=" RUBY_LAST_COMMIT_TITLE, stdout);
-- 
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