Prefer stdbool for MJIT options

same motivation as d6f21b308b

mjit.c

@@ -1768,19 +1768,19 @@ mjit_setup_options(const char *s, struct mjit_options *mjit_opt)
         return;
     }
     else if (opt_match_noarg(s, l, "warnings")) {
-        mjit_opt->warnings = 1;
+        mjit_opt->warnings = true;
     }
     else if (opt_match(s, l, "debug")) {
         if (*s)
             mjit_opt->debug_flags = strdup(s + 1);
         else
-            mjit_opt->debug = 1;
+            mjit_opt->debug = true;
     }
     else if (opt_match_noarg(s, l, "wait")) {
-        mjit_opt->wait = 1;
+        mjit_opt->wait = true;
     }
     else if (opt_match_noarg(s, l, "save-temps")) {
-        mjit_opt->save_temps = 1;
+        mjit_opt->save_temps = true;
     }
     else if (opt_match(s, l, "verbose")) {
         mjit_opt->verbose = *s ? atoi(s + 1) : 1;

mjit.h

@@ -37,20 +37,20 @@ enum rb_mjit_iseq_func {
 struct mjit_options {
     // Converted from "jit" feature flag to tell the enablement
     // information to ruby_show_version().
-    char on;
+    bool on;
     // Save temporary files after MRI finish.  The temporary files
     // include the pre-compiled header, C code file generated for ISEQ,
     // and the corresponding object file.
-    char save_temps;
+    bool save_temps;
     // Print MJIT warnings to stderr.
-    char warnings;
+    bool warnings;
     // Disable compiler optimization and add debug symbols. It can be
     // very slow.
-    char debug;
+    bool debug;
     // Add arbitrary cflags.
     char* debug_flags;
     // If not 0, all ISeqs are synchronously compiled. For testing.
-    unsigned int wait;
+    bool wait;
     // Number of calls to trigger JIT compilation. For testing.
     unsigned int min_calls;
     // Force printing info about MJIT work of level VERBOSE or

ruby.c

@@ -1850,7 +1850,7 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
 
 #if USE_MJIT
     if (FEATURE_SET_P(opt->features, mjit)) {
-        opt->mjit.on = TRUE; /* set mjit.on for ruby_show_version() API and check to call mjit_init() */
+        opt->mjit.on = true; // set mjit.on for ruby_show_version() API and check to call mjit_init()
     }
 #endif
 #if USE_YJIT