[dpdk-dev] [PATCH v2] mk: pass EXTRA_CFLAGS to AUTO_CPUFLAGS to enable local modifications

[Simon Kagstrom <simon.kagstrom@netinsight.net>]

We have encountered a CPU where the AES-NI instruction set is disabled
due to export restrictions. Since the build machine and target machine
is different, using -native configs doesn't work, and on this CPU, the
application refuses to run due to the AES CPU flags being amiss.

The patch passes EXTRA_CFLAGS to the figure-out-cpu-flags helper,
which allows us to add -mno-aes to the compile flags and resolve this
problem.

Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
---
ChangeLog:

v2:
* Put EXTRA_CFLAGS after MACHINE_CFLAGS to enable overriding values

 mk/rte.cpuflags.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mk/rte.cpuflags.mk b/mk/rte.cpuflags.mk
index bec7bdd..4b30c6b 100644
--- a/mk/rte.cpuflags.mk
+++ b/mk/rte.cpuflags.mk
@@ -33,7 +33,7 @@
 # used to set the RTE_CPUFLAG_* environment variables giving details
 # of what instruction sets the target cpu supports.
 
-AUTO_CPUFLAGS := $(shell $(CC) $(MACHINE_CFLAGS) -dM -E - < /dev/null)
+AUTO_CPUFLAGS := $(shell $(CC) $(MACHINE_CFLAGS) $(EXTRA_CFLAGS) -dM -E - < /dev/null)
 
 # adding flags to CPUFLAGS
 
-- 
1.9.1