X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fmlx4%2FMakefile;h=efed953e737c13acc6c20e86c30290e5ef23ca0b;hb=c1c543efb1c79f59dad47cbaddb0e382ba1f183c;hp=4d163433b573bab8c1fc2318bdf5d4f8c8107b7b;hpb=d06c608c013c36711e7a693b3fece68a93ae4369;p=dpdk.git

diff --git a/drivers/net/mlx4/Makefile b/drivers/net/mlx4/Makefile
index 4d163433b5..efed953e73 100644
--- a/drivers/net/mlx4/Makefile
+++ b/drivers/net/mlx4/Makefile
@@ -100,7 +100,9 @@ ifndef V
 AUTOCONF_OUTPUT := >/dev/null
 endif
 
-mlx4_autoconf.h: $(RTE_SDK)/scripts/auto-config-h.sh
+mlx4_autoconf.h.new: FORCE
+
+mlx4_autoconf.h.new: $(RTE_SDK)/scripts/auto-config-h.sh
 	$Q $(RM) -f -- '$@'
 	$Q sh -- '$<' '$@' \
 		RSS_SUPPORT \
@@ -120,9 +122,16 @@ mlx4_autoconf.h: $(RTE_SDK)/scripts/auto-config-h.sh
 		enum IBV_EXP_QP_BURST_CREATE_DISABLE_ETH_LOOPBACK \
 		$(AUTOCONF_OUTPUT)
 
+# Create mlx4_autoconf.h or update it in case it differs from the new one.
+
+mlx4_autoconf.h: mlx4_autoconf.h.new
+	$Q [ -f '$@' ] && \
+		cmp '$<' '$@' $(AUTOCONF_OUTPUT) || \
+		mv '$<' '$@'
+
 mlx4.o: mlx4_autoconf.h
 
 clean_mlx4: FORCE
-	$Q rm -f -- mlx4_autoconf.h
+	$Q rm -f -- mlx4_autoconf.h mlx4_autoconf.h.new
 
 clean: clean_mlx4