[dpdk-dev] rte_memcpy.h: additional cflags required with OVS

[Wang, Zhihong]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Kavanagh, Mark B	
> Sent: Tuesday, March 10, 2015 6:04 PM
> To: Mcnamara, John; Qiu, Michael; dev at dpdk.org; Panu Matilainen
> Subject: Re: [dpdk-dev] rte_memcpy.h: additional cflags required with OVS
> 
> 
> 
> >-----Original Message-----
> >From: Mcnamara, John
> >Sent: Tuesday, March 10, 2015 8:27 AM
> >To: Qiu, Michael; Kavanagh, Mark B; dev at dpdk.org; Panu Matilainen
> >Subject: RE: [dpdk-dev] rte_memcpy.h: additional cflags required with
> >OVS
> >
> >> -----Original Message-----
> >> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Qiu, Michael
> >> Sent: Tuesday, March 10, 2015 3:05 AM
> >> To: Kavanagh, Mark B; dev at dpdk.org
> >> Subject: Re: [dpdk-dev] rte_memcpy.h: additional cflags required with
> >> OVS
> >>
> >
> >> What's your gcc version? this should be an issue with old version
> >> gcc, and I'm working on this to solve this issue now.
> >
> >
> >Hi Michael,
> >
> >I see the issue with gcc 4.7.2 but not with 4.9.2.
> 
> I'm using gcc v4.8.3.
> 
> Just to clarify my initial post, there are two issues related to gcc intrinsic
> headers emmintrin.h, and tmmintrin.h:
> 	- in former, a difference in parameter types for _mm_storeu_si128 is
> the issue. This is the primary issue observed.
> 	- in tmmintrin.h, when __OPTIMIZE__ is not defined, function
> _mm_alignr_epi8 is also not defined, leading to an 'implicit definition of
> function' error.

Add the "-mssse3" flag should be able to solve the 'implicit definition of function' error.
BTW, current dpdk should compile with gcc 4.7.2, anything changed there that makes this flag mandatory?

Zhihong (John)

> 	  I've only noticed this intermittently (even though I compile OVS with
> -O2 CFLAGS)
> 
> >
> >John