no --jit-cc

* ruby.c (setup_mjit_options): removed --jit-cc option, since
  mjit header is affected by generated config.h which depends on
  the given compiler, so it cannot work with different compilers.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62379 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

mjit.h

@@ -25,21 +25,9 @@ enum rb_mjit_iseq_func {
     LAST_JIT_ISEQ_FUNC = 3
 };
 
-/* C compiler used to generate native code. */
-enum rb_mjit_cc {
-    /* Not selected */
-    MJIT_CC_DEFAULT = 0,
-    /* GNU Compiler Collection */
-    MJIT_CC_GCC = 1,
-    /* LLVM/Clang */
-    MJIT_CC_CLANG = 2
-};
-
 /* MJIT options which can be defined on the MRI command line.  */
 struct mjit_options {
     char on; /* flag of MJIT usage  */
-    /* Default: clang for macOS, cl for Windows, gcc for others. */
-    enum rb_mjit_cc cc;
     /* 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.  */

ruby.c

@@ -270,7 +270,6 @@ usage(const char *name, int help)
 	M("frozen-string-literal", "", "freeze all string literals (default: disabled)"),
     };
     static const struct message mjit_options[] = {
-        M("--jit-cc=cc",         "", "C compiler to generate native code (gcc, clang)"),
         M("--jit-warnings",      "", "Enable printing MJIT warnings"),
         M("--jit-debug",         "", "Enable MJIT debugging (very slow)"),
         M("--jit-wait",          "", "Wait until JIT compilation is finished everytime (for testing)"),
@@ -912,28 +911,11 @@ set_option_encoding_once(const char *type, VALUE *name, const char *e, long elen
 #define set_source_encoding_once(opt, e, elen) \
     set_option_encoding_once("source", &(opt)->src.enc.name, (e), (elen))
 
-static enum rb_mjit_cc
-parse_mjit_cc(const char *s)
-{
-    if (strcmp(s, "gcc") == 0) {
-        return MJIT_CC_GCC;
-    }
-    else if (strcmp(s, "clang") == 0) {
-        return MJIT_CC_CLANG;
-    }
-    else {
-        rb_raise(rb_eRuntimeError, "invalid C compiler `%s' (available C compilers: gcc, clang)", s);
-    }
-}
-
 static void
 setup_mjit_options(const char *s, struct mjit_options *mjit_opt)
 {
     mjit_opt->on = 1;
     if (*s == 0) return;
-    if (strncmp(s, "-cc=", 4) == 0) {
-        mjit_opt->cc = parse_mjit_cc(s + 4);
-    }
     else if (strcmp(s, "-warnings") == 0) {
         mjit_opt->warnings = 1;
     }