compiler version

* common.mk (showflags): show the compiler version.

* configure.in (CC_VERSION): compiler with version option.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39873 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

Makefile.in

@@ -53,6 +53,7 @@ arch_hdrdir = $(EXTOUT)/include/$(arch)
 VPATH = $(arch_hdrdir)/ruby:$(hdrdir)/ruby:$(srcdir):$(srcdir)/enc:$(srcdir)/missing
 
 empty =
+CC_VERSION = @CC_VERSION@
 OUTFLAG = @OUTFLAG@$(empty)
 COUTFLAG = @COUTFLAG@$(empty)
 ARCH_FLAG = @ARCH_FLAG@

common.mk

@@ -159,6 +159,7 @@ showflags:
 	"	DLDFLAGS = $(DLDFLAGS)" \
 	"	SOLIBS = $(SOLIBS)" \
 	$(MESSAGE_END)
+	-@$(CC_VERSION)
 
 .PHONY: showconfig
 showconfig:

configure.in

@@ -422,6 +422,13 @@ RUBY_CPPOUTFILE
 AC_SUBST(OUTFLAG)
 AC_SUBST(COUTFLAG)
 
+cc_version_option=
+for option in --version -v -V -qversion; do
+    $CC $option > /dev/null 2>&1 || continue
+    cc_version='$(CC) '$option
+done
+AC_SUBST(CC_VERSION, $cc_version)
+
 RUBY_UNIVERSAL_ARCH
 if test "$target_cpu" != "$host_cpu" -a "$GCC" = yes -a "$cross_compiling" = no -a "$universal_binary" = no; then
     RUBY_DEFAULT_ARCH("$target_cpu")