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

[Olivier MATZ <olivier.matz@6wind.com>]

Hi Simon,

On 12/04/2015 09:12 AM, Simon Kågström wrote:
> Hi Olivier!
> 
> Does this commit look OK now with the changes you proposed?
> 
> Thanks,
> // Simon
> 
> On 2015-11-24 08:50, Simon Kagstrom wrote:
>> 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
>>  
>>


Acked-by: Olivier Matz <olivier.matz@6wind.com>