* configure.in: Add compiler version message into rbconfig

as RbConfig::CONFIG['CC_VERSION_MESSAGE']. [Feature #12896]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56556 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Fri Nov  4 15:31:00 2016  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* configure.in: Add compiler version message into rbconfig
+	  as RbConfig::CONFIG['CC_VERSION_MESSAGE']. [Feature #12896]
+
 Fri Nov  4 13:03:00 2016  Kenta Murata  <mrkn@mrkn.jp>
 
 	* numeric.c (rb_int_digits): Fix exception message

configure.in

@@ -536,8 +536,10 @@ for option in --version -v -V -qversion; do
     AS_CASE($cc_version_status, [0], [:], [continue])
     AS_CASE($cc_version_message, [*Warning*], [continue])
     cc_version='$(CC) '$option
+    break
 done
 AC_SUBST(CC_VERSION, $cc_version)
+AC_SUBST(CC_VERSION_MESSAGE, $cc_version_message)
 
 RUBY_UNIVERSAL_ARCH
 if test "$target_cpu" != "$host_cpu" -a "$GCC" = yes -a "$cross_compiling" = no -a "$universal_binary" = no; then