debian: Avoid -Wformat-zero-length warnings.

Debian puts an extra "-Wformat" in the CFLAGS following OVS's own "-Wformat -Wno-format-zero-length", which therefore overrides -Wno-format-zero-length, so this commit adds an extra -Wno-format-zero-length to avoid those false positives. Signed-off-by: Ben Pfaff <[email protected]> Acked-by: Justin Pettit <[email protected]>
robin-zhou · Jul 22, 2014 · 346f589 · 346f589
1 parent 13a233f
commit 346f589
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/debian/rules b/debian/rules
@@ -35,6 +35,13 @@ endif
 buildflags := $(shell if dpkg-buildflags --export=configure >/dev/null 2>&1; \
 	              then dpkg-buildflags --export=configure; fi)
 
+# dpkg-buildflags tends to turn on -Wformat, which is admirable, but
+# the -Wformat-zero-length subset of that option triggers a couple of
+# false positives in Open vSwitch so turn it right back off again.
+# (We do this in configure.ac also, but the Debian buildflags override
+# those.)
+buildflags := $(patsubst -Wformat,-Wformat -Wno-format-zero-length,$(buildflags))
+
 configure: configure-stamp
 configure-stamp:
 	dh_testdir