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-rw-r--r--GNUmakefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/GNUmakefile b/GNUmakefile
index 51045d4..2505e1f 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -249,5 +249,10 @@ endif
 $(PLACEHOLDERS):
         echo olddoc_placeholder > $@
 
+check-warnings:
+        @(for i in $$(git ls-files '*.rb' bin | grep -v '^setup\.rb$$'); \
+          do $(RUBY) --disable-gems -d -W2 -c \
+          $$i; done) | grep -v '^Syntax OK$$' || :
+
 .PHONY: .FORCE-GIT-VERSION-FILE doc $(T) $(slow_tests) man
 .PHONY: test-install