Re: 1.7.0 release failed to compile on linux

[Qiaobing Xie <qiaobing.xie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Nail,

Thanks for the info... I got v1.7.0 tarball compile after configuring 
out both IXGBE_INC_VECTOR and ACL. I will take a look at the head.

-Q

On 8/14/14 7:16 PM, Neil Horman wrote:
> On Thu, Aug 14, 2014 at 06:15:24PM -0400, Aws Ismail wrote:
>> On 08/14/2014 05:44 PM, Qiaobing Xie wrote:
>>> Hi,
>>>
>>> I got the following error when I tried to compile 1.7.0 release tarball on
>>> a Linux box (Ubuntu 12.04/kernel=3.13.0-32-generic, gcc=4.6.3):
>>>
>>> ============
>>> In file included from /home/qxie/dpdk-1.7.0/lib/librte_eal/linuxapp/kni/ethtool/igb/e1000_osdep.h:41:0,
>>> from
>>> /home/qxie/dpdk-1.7.0/lib/librte_eal/linuxapp/kni/ethtool/igb/e1000_hw.h:31,
>> >from /home/qxie/dpdk-1.7.0/lib/librte_eal/linuxapp/kni/ethtool/igb/e1000_api.h:31,
>> >from /home/qxie/dpdk-1.7.0/build/build/lib/librte_eal/linuxapp/kni/e1000_82575.c:38:
>>> /home/qxie/dpdk-1.7.0/lib/librte_eal/linuxapp/kni/ethtool/igb/kcompat.h:3853:1:
>>> error: conflicting types for ‘skb_set_hash’
>>> /usr/src/linux-headers-3.13.0-32-generic/include/linux/skbuff.h:740:1:
>>> note: previous definition of ‘skb_set_hash’ was here
>>> make[8]: *** [/home/qxie/dpdk-1.7.0/build/build/lib/librte_eal/linuxapp/kni/e1000_82575.o]
>>> Error 1
>>> ============
>>>
>>> Apparently the version check around 'skb_set_hash' in kcompat.h failed for
>>> some reason. To work around it, I temporarily commented out that
>>> 'skb_set_hash' definition code and rte_kni complied fine. But it failed
>>> again in librte_pmd_ixgbe:
>>>
>>> =============
>>> In file included from
>>> /home/qxie/dpdk-1.7.0/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c:41:0:
>>> /usr/lib/gcc/x86_64-linux-gnu/4.6/include/nmmintrin.h:31:3: error: #error
>>> "SSE4.2 instruction set not enabled"
>>  From the error, nmmintrin.h contains built-in CPU calls that depend on the
>> CPU having SSE4.2 extensions. You need to hunt down the call that is being
>> executed and see which file is including nmmintrin.h. For example, I have
>> encountered similar error on a CPU that does not have SSE4.1 and 4.2
>> extension and it was trying to call the built-in HW crc hashing call.
>> instead I switched with rte_jhash.h, the alternative SW implementation of
>> the hashing call.
>>
>> Looking below, nmmintrin.h is being included by the
>> lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c, from the looks of it. This means that
>> your defconfig (did you use the default one?) has
>> CONFIG_RTE_IXGBE_INC_VECTOR value set to "y". try setting it to "n" and see
>> where the build would stop next looking for another SSE4.x based builtin
>> call.
>>
> This is fixed at the head of the dpdk git tree.  The vector rx code has been
> converted to use builtin intrinsics that can work without sse support in the
> cpu.  The ACL library has a simmilar problem, but we are working at enabling it
> for all cpus, with runtime updates to faster paths when the executing cpu
> supports it.
>
>> My ultimate recommendation is to update you CPU to a newer one or perform
>> the build/run on a separate newer CPU.
>>
> Building on a newer cpu won't help if you intend to run it on an older cpu.
>
> Neil
>