* Makefile.in (reconfig): force reconfigure with previous options.

* common.mk (showconfig): show configure flags, like as
  `config.status --config' generated by recent autoconf.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29825 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/common.mk b/common.mk
index 9846c55ee4..8d4d0de744 100644
--- a/common.mk
+++ b/common.mk
@@ -150,6 +150,12 @@ showflags:
 	"	SOLIBS = $(SOLIBS)" \
 	$(MESSAGE_END)
 
+.PHONY: showconfig
+showconfig:
+	@$(MESSAGE_BEGIN) \
+	"$(configure_args)" \
+	$(MESSAGE_END)
+
 exts: $(MKMAIN_CMD)
 
 $(MKMAIN_CMD): $(MKFILES) incs $(PREP) $(RBCONFIG) $(LIBRUBY)