* common.mk (SHOWFLAGS): show compile flags.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29749 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 0 deletions

diff --git a/common.mk b/common.mk
index ab8e1a556f..75d555cad3 100644
--- a/common.mk
+++ b/common.mk
@@ -139,6 +139,16 @@ all: main docs
 main: encs exts
 	@$(RUNCMD) $(MKMAIN_CMD) $(MAKE)
 
+.PHONY: showflags SHOWFLAGS
+exts enc trans: showflags
+showflags: SHOWFLAGS
+SHOWFLAGS:
+	@echo "	CFLAGS = $(CFLAGS)"
+	@echo "	XCFLAGS = $(XCFLAGS)"
+	@echo "	CPPFLAGS = $(CPPFLAGS)"
+	@echo "	DLDFLAGS = $(DLDFLAGS)"
+	@echo "	SOLIBS = $(SOLIBS)"
+
 exts: $(MKMAIN_CMD)
 
 $(MKMAIN_CMD): $(MKFILES) incs $(PREP) $(RBCONFIG) $(LIBRUBY)