Re: [PATCH] config: set pkgconfig for ppc64le

[David Christensen <drc@linux.vnet.ibm.com>]

On 7/18/22 1:16 PM, Thinh Tran wrote:
> 
> 
> On 7/14/2022 1:58 AM, Ali Alnubani wrote:
>>> -----Original Message-----
>>> From: Thinh Tran <thinhtr@linux.vnet.ibm.com>
>>> Sent: Wednesday, July 13, 2022 10:50 PM
>>> To: Ali Alnubani <alialnu@nvidia.com>; NBU-Contact-Thomas Monjalon
>>> (EXTERNAL) <thomas@monjalon.net>
>>> Cc: dev@dpdk.org; David Christensen <drc@linux.vnet.ibm.com>
>>> Subject: Re: [PATCH] config: set pkgconfig for ppc64le
>>>
>>> Hi,
>>>
>>> On 7/13/2022 2:39 AM, Ali Alnubani wrote:
>>>>> -----Original Message-----
>>>>> From: Thomas Monjalon <thomas@monjalon.net>
>>>>> Sent: Monday, July 11, 2022 11:11 PM
>>>>> To: Ali Alnubani <alialnu@nvidia.com>
>>>>> Cc: dev@dpdk.org; David Christensen <drc@linux.vnet.ibm.com>
>>>>> Subject: Re: [PATCH] config: set pkgconfig for ppc64le
>>>>>
>>>>> + PPC maintainer
>>>>>
>>>>> 07/07/2022 13:41, Ali Alnubani:
>>>>>> Meson fails to detect the dependencies that are included
>>>>>> in PKG_CONFIG_PATH and built for ppc64le if binaries.pkgconfig
>>>>>> is not set in the ppc64le cross-file for Ubuntu.
>>>>>>
>>>>>> This fixes the issue by setting binaries.pkgconfig to the
>>>>>> binary provided by the package 'pkg-config-powerpc64le-linux-gnu'.
>>>>>>
>>>>>> Signed-off-by: Ali Alnubani <alialnu@nvidia.com>
>>>>>> ---
>>>>>>    config/ppc/ppc64le-power8-linux-gcc-ubuntu | 1 +
>>>>>
>>>>> Why not adding the same for ppc64le-power8-linux-gcc?
>>>>>
>>>>>> +pkgconfig = 'powerpc64le-linux-gnu-pkg-config'
>>>>
>>>> I didn't find any operating systems that distribute the powerpc64le 
>>>> cross-
>>> compiler with the binary names found in config/ppc/ppc64le-power8-linux-
>>> gcc.
>>>> Both Ubuntu and Fedora use the -gnu suffix. Fedora doesn't seem to have
>>> a pkg-config binary for powerpc64le though.
>>>
>>> I am able to cross-compile dpdk on Ubuntu with the default config file
>>> My system info:
>>> # uname -rvm
>>>    5.4.0-113-generic #127-Ubuntu SMP Wed May 18 14:30:56 UTC 2022 x86_64
>>>
>>> # apt list gcc-10-powerpc64le-linux-gnu | grep installed
>>> gcc-10-powerpc64le-linux-gnu/focal-updates,focal-security,now
>>> 10.3.0-1ubuntu1~20.04cross1 amd64 [installed]
>>> # which powerpc64le-linux-gnu-gcc
>>> /usr/bin/powerpc64le-linux-gnu-gcc
>>> # ls -l /usr/bin/powerpc64le-linux-gnu-gcc
>>> lrwxrwxrwx 1 root root 37 Jul 13 11:56
>>> /usr/bin/powerpc64le-linux-gnu-gcc -> 
>>> /usr/bin/powerpc64le-linux-gnu-gcc-
>>> 10
>>>
>>> # apt list pkg-config | grep installed
>>> pkg-config/focal,now 0.29.1-0ubuntu4 amd64 [installed]
>>>
>>> # meson cross-build_p8 --cross-file
>>> config/ppc/ppc64le-power8-linux-gcc-ubuntu
>>> The Meson build system
>>> Version: 0.56.2
>>> Source dir: /root/dpdk
>>> Build dir: /root/dpdk/cross-build_p8
>>> Build type: cross build
>>> Program cat found: YES (/bin/cat)
>>> Project name: DPDK
>>> Project version: 22.07.0-rc4
>>> C compiler for the host machine: powerpc64le-linux-gnu-gcc (gcc 10.3.0
>>> "powerpc64le-linux-gnu-gcc (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0")
>>> C linker for the host machine: powerpc64le-linux-gnu-gcc ld.bfd 2.34
>>> C compiler for the build machine: cc (gcc 9.4.0 "cc (Ubuntu
>>> 9.4.0-1ubuntu1~20.04.1) 9.4.0")
>>> C linker for the build machine: cc ld.bfd 2.34
>>> Build machine cpu family: x86_64
>>> Build machine cpu: x86_64
>>> Host machine cpu family: x86_64
>>> Host machine cpu: x86_64
>>> Target machine cpu family: ppc64
>>> Target machine cpu: power8
>>> Program pkg-config found: YES (/usr/bin/pkg-config)
>>> Program check-symbols.sh found: YES (/root/dpdk/buildtools/check-
>>> symbols.sh)
>>> Program options-ibverbs-static.sh found: YES
>>> (/root/dpdk/buildtools/options-ibverbs-static.sh)
>>> Program objdump found: YES (/usr/bin/objdump)
>>> Program python3 found: YES (/usr/bin/python3)
>>> Program cat found: YES (/bin/cat)
>>> Program ../buildtools/symlink-drivers-solibs.sh found: YES (/bin/sh
>>> /root/dpdk/config/../buildtools/symlink-drivers-solibs.sh)
>>> Checking for size of "void *" : 8
>>> Checking for size of "void *" : 8
>>> ......
>>> Build targets in project: 851
>>>
>>> Found ninja-1.10.0 at /usr/bin/ninja
>>> # ninja -C cross-build_p8
>>> ninja: Entering directory `cross-build_p8'
>>> [2933/2933] Linking target app/test/dpdk-test
>>>
>>> similar to it, I'm able to build for power9
>>>
>>
>> Hi Thinh,
>>
>> I'm also able to cross-build for ppc64 on Ubuntu, but without setting 
>> binaries.pkgconfig, meson will skip some build targets, even if 
>> PKG_CONFIG_PATH points to their dependencies.
>> Have you tried on Fedora?

As Thinh points out, you can't cross-compile for ppc64le on Fedora with 
distro supplied packages.  Ran across this question about the issue 
relative to ARM on the Fedora Project website:

https://ask.fedoraproject.org/t/cross-compiling-to-arm/17864/12

And also confirmed internally with our toolchain developers that you'd 
need glibc support which isn't provided in the existing Fedora packages. 
  Consensus seems to be that Fedora cross-compile is for 
kernels/bootloaders only, though I'd love to hear from someone at Red 
Hat if I'm mistaken.

Ubuntu/Debian do support the functionality, so you could try those 
environments (as used by Github Actions for DPDK commits), use a third 
party toolchain such as those found on:

https://toolchains.bootlin.com/releases_powerpc64le-power8.html

Or you could use the IBM Advanced Toolchain for POWER:

https://www.ibm.com/support/pages/advtool-cross-compilers

Dave