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From: Simon Kagstrom <simon.kagstrom@netinsight.net>
To: Olivier MATZ <olivier.matz@6wind.com>, dev@dpdk.org
Subject: [dpdk-dev] [PATCH v2] mk: pass EXTRA_CFLAGS to AUTO_CPUFLAGS to enable local modifications
Date: Tue, 24 Nov 2015 08:50:01 +0100	[thread overview]
Message-ID: <20151124085001.58817bf0@miho> (raw)

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

             reply	other threads:[~2015-11-24  7:50 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-24  7:50 Simon Kagstrom [this message]
2015-12-04  8:12 ` Simon Kågström
2015-12-04 10:15   ` Olivier MATZ
2015-12-04 18:53     ` Thomas Monjalon
2015-12-07  8:33       ` Panu Matilainen
2015-12-07 11:47         ` Simon Kågström
2015-12-07 11:47         ` Thomas Monjalon

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