ruby.c: do not surface MJIT to user

In some places, both JIT and MJIT are being used, but it could be
confusing for new comers. We're not explaining MJIT on NEWS file or release
notes as well. So we consider MJIT as an internal term of implementation
like YARV.

configure.ac: ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65810 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

configure.ac

@@ -3341,10 +3341,10 @@ AC_SUBST(CAPITARGET)
 AS_CASE(["$RDOCTARGET:$CAPITARGET"],[nodoc:nodoc],[INSTALLDOC=nodoc],[INSTALLDOC=all])
 AC_SUBST(INSTALLDOC)
 
-AC_ARG_ENABLE(mjit-support,
+AC_ARG_ENABLE(jit-support,
-        AS_HELP_STRING([--disable-mjit-support], [disable MJIT features]),
+        AS_HELP_STRING([--disable-jit-support], [disable JIT features]),
         [MJIT_SUPPORT=$enableval
-         AS_IF([test x"$enable_mjit_support" = "xyes"],
+         AS_IF([test x"$enable_jit_support" = "xyes"],
                  [AC_DEFINE(USE_MJIT, 1)],
                  [AC_DEFINE(USE_MJIT, 0)])],
         [MJIT_SUPPORT=yes
@@ -4016,7 +4016,7 @@ config_summary "debugflags"          "$debugflags"
 config_summary "warnflags"           "$warnflags"
 config_summary "strip command"       "$STRIP"
 config_summary "install doc"         "$install_doc"
-config_summary "MJIT support"        "$MJIT_SUPPORT"
+config_summary "JIT support"         "$MJIT_SUPPORT"
 config_summary "man page type"       "$MANTYPE"
 config_summary "search path"         "$search_path"
 config_summary "static-linked-ext"   ${EXTSTATIC:+"yes"}

ruby.c

@@ -252,8 +252,8 @@ usage(const char *name, int help)
 	M("-w",		   "",			   "turn warnings on for your script"),
 	M("-W[level=2]",   "",			   "set warning level; 0=silence, 1=medium, 2=verbose"),
 	M("-x[directory]", "",			   "strip off text before #!ruby line and perhaps cd to directory"),
-        M("--jit",         "",                     "enable MJIT with default options (experimental)"),
+        M("--jit",         "",                     "enable JIT with default options (experimental)"),
-        M("--jit-[option]","",                     "enable MJIT with an option (experimental)"),
+        M("--jit-[option]","",                     "enable JIT with an option (experimental)"),
 	M("-h",		   "",			   "show this message, --help for more info"),
     };
     static const struct message help_msg[] = {
@@ -279,14 +279,14 @@ usage(const char *name, int help)
 	M("did_you_mean", "",   "did_you_mean (default: "DEFAULT_RUBYGEMS_ENABLED")"),
 	M("rubyopt", "",        "RUBYOPT environment variable (default: enabled)"),
 	M("frozen-string-literal", "", "freeze all string literals (default: disabled)"),
-        M("jit", "",            "MJIT (default: disabled)"),
+        M("jit", "",            "JIT compiler (default: disabled)"),
     };
     static const struct message mjit_options[] = {
-        M("--jit-warnings",      "", "Enable printing MJIT warnings"),
+        M("--jit-warnings",      "", "Enable printing JIT warnings"),
-        M("--jit-debug",         "", "Enable MJIT debugging (very slow)"),
+        M("--jit-debug",         "", "Enable JIT debugging (very slow)"),
         M("--jit-wait",          "", "Wait until JIT compilation is finished everytime (for testing)"),
-        M("--jit-save-temps",    "", "Save MJIT temporary files in $TMP or /tmp (for testing)"),
+        M("--jit-save-temps",    "", "Save JIT temporary files in $TMP or /tmp (for testing)"),
-        M("--jit-verbose=num",   "", "Print MJIT logs of level num or less to stderr (default: 0)"),
+        M("--jit-verbose=num",   "", "Print JIT logs of level num or less to stderr (default: 0)"),
         M("--jit-max-cache=num", "", "Max number of methods to be JIT-ed in a cache (default: 1000)"),
         M("--jit-min-calls=num", "", "Number of calls to trigger JIT (for testing, default: 5)"),
     };
@@ -308,7 +308,7 @@ usage(const char *name, int help)
     puts("Features:");
     for (i = 0; i < numberof(features); ++i)
 	SHOW(features[i]);
-    puts("MJIT options (experimental):");
+    puts("JIT options (experimental):");
     for (i = 0; i < numberof(mjit_options); ++i)
 	SHOW(mjit_options[i]);
 }