Re: [dpdk-dev] [PATCH v2] devtools: fix 32-bits build

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 11/9/2020 9:02 PM, Thomas Monjalon wrote:
> 09/11/2020 18:44, Thomas Monjalon:
>> 09/11/2020 18:20, Thomas Monjalon:
>>> 09/11/2020 18:15, Ferruh Yigit:
>>>> On 11/9/2020 5:01 PM, Thomas Monjalon wrote:
>>>>> 09/11/2020 17:48, Ferruh Yigit:
>>>>>> I can send a new version to reset 'CUSTOM_PKG_CONFIG_PATH',
>>>>>> what is the intention/plan with the config file?
>>>>>
>>>>> You should use a config file to set PKG_CONFIG_PATH, PATH,
>>>>> DPDK_MESON_OPTIONS, etc accordingly to build with all
>>>>> your non-installed dependencies.
>>>>> CUSTOM_PKG_CONFIG_PATH is a way to avoid using the config file
>>>>> in a single case.
>>>>>
>>>>
>>>> Either use 'PKG_CONFIG_PATH' environment variable or a config file, both has the
>>>> same problem that we need two different pkg config path, one for 64bit and one
>>>> for 32bit.
>>>
>>> No. In the config file, you can set the right value by testing $DPDK_TARGET.
>>> Note: the config file is a shell script.
>>>
>>>> v2 of this patch provides a way to use correct one when needed.
>>>
>>> This is not a global fix.
>>>
>>>> Moving the default values from system environment or script hardcoded values to
>>>> a config file is something else and can be done later, what do you think?
>>>
>>> The root cause of your issue is using variables from the environment.
>>> The global fix is then to reset them all,
>>> while keeping a default value for PATH which is not only for compilation config.
>>
>> This is what we have currently:
>>
>>      export PATH=$default_path
>>      export PKG_CONFIG_PATH=$default_pkgpath
>>      export CPPFLAGS=$default_cppflags
>>      export CFLAGS=$default_cflags
>>      export LDFLAGS=$default_ldflags
>>      unset DPDK_MESON_OPTIONS
>>
>> The PATH needs to be restored at each run to avoid using a wrong toolchain.
>> The default value is best taken from the start environment,
>> at the condition no conflicting toolchain is already set.
>>
>> PKG_CONFIG_PATH is specific to each target.
>> I believe it can be reset at each run and configured
>> only from the config file.
>> A default PKG_CONFIG_PATH for all targets does not make any sense.
>>
>> CPPFLAGS, CFLAGS and LDFLAGS could be used to customize some options
>> applying to all targets in some build tests without touching the config file.
>>
>> DPDK_MESON_OPTIONS could be the same as CFLAGS: take a global default from env
>> and restore the value at each run, so each target can have additional options
>> from the config file.
> 
> The implementation of the above is done in this patch:
> 	https://patches.dpdk.org/patch/83861/
> 
> 

self nack this patch on behalf of above one.