* common.mk (help): show major targets.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15270 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 0 deletions

diff --git a/common.mk b/common.mk
index bf27541c57..ed8a8a60fc 100644
--- a/common.mk
+++ b/common.mk
@@ -797,3 +797,14 @@ dist: $(PROGRAM)
 up:
 	@$(VCS) up "$(srcdir)" |\
 	sed '-e$${' -eh "-es/[^0-9]//g" "-es/^/#define RUBY_REVISION /" "-ew$(srcdir)/revision.h" -eg "-e}"
+
+help:
+	@echo '                Makefile of Ruby'
+	@echo
+	@echo 'targets:'
+	@echo '  all:           compile ruby and extensions'
+	@echo '  check:         equals make test test-all'
+	@echo '  test:          ruby core tests'
+	@echo '  test-all:      all ruby tests'
+	@echo '  install:       install all ruby distributions'
+	@echo '  install-nodoc: install without rdoc'