Re: [ptxdist] Error building nodejs in 2023.10.0

["Jean-Claude Monnin" <jc_monnin@emailplus.org>]

Hi Michael,

Thanks for the reply. I'm using ptxdist-2023.10.0.
Python is called by the node build system, and it looks like it was using the host python in my case. Possibly it's because another package selects host python; maybe it works if host python isn't there at all.
I'm happy with the workaround, but I see your point of wanting to use system python instead. Is there any way to check/fix why it selects host python on my system?

Jean-Claude

On Fri, Nov 10, 2023, at 9:00 AM, Michael Olbrich wrote:
> Hallo,
>
> On Wed, Nov 01, 2023 at 05:04:30PM +0100, Jean-Claude Monnin wrote:
>> When trying to build nodejs with the latest ptxdist, I faced an error about missing a python module `ModuleNotFoundError: No module named '_bz2'` (see [1]).
>> 
>> I'm not very proficient with ptxdist, so I would like to check if the solution I came up is correct. Feedback welcome. If solution is ok, feel free to apply it upstream or ask for a proper email patch.
>> 
>> I think it's due to following issues:
>> - The host python is missing the option to support BZIP2. I added an option for that.
>> - nodejs.in says it depends on HOST_SYSTEM_PYTHON3, however it seems like the build isn't using system python but host python built by ptxdist. I think it should depend on HOST_PYTHON3 and the new HOST_PYTHON3_BZIP2.
>> 
>> See [2] for the patch I applied.
>
> Python in PTXdist is a bit tricky. We don't want to compile Python itself
> just to run a few Python scripts at build-time. That's what
> "host-system-python3" is for. It does not build anything, it just checks
> if Python3 and required packages are installed.
>
> "host-python3" is used when building Python packages for the target.
>
> In this case, it looks like the wrong Python is used. Which ptxdist version
> are you using?
>
> Michael
>
>> Kind regards,
>> Jean-Claude
>> 
>> 
>> [1] Error message
>> 
>> ----------------------
>> target: nodejs.prepare
>> ----------------------
>> 
>> Node.js configure: Found Python 3.11.2...
>> Traceback (most recent call last):
>>   File "/home/jean-claude/code/test-ptxdist/platform-nanopi-rk3588/build-target/node-v18.13.0/./configure", line 28, in <module>
>>     import configure
>>   File "/home/jean-claude/code/test-ptxdist/platform-nanopi-rk3588/build-target/node-v18.13.0/configure.py", line 14, in <module>
>>     import bz2
>>   File "/home/jean-claude/code/test-ptxdist/platform-nanopi-rk3588/sysroot-target/usr/lib/python3.11/bz2.py", line 17, in <module>
>>     from _bz2 import BZ2Compressor, BZ2Decompressor
>> ModuleNotFoundError: No module named '_bz2'
>> 
>> 
>> [2] possible patch
>> 
>> diff --git a/rules/host-python3.in b/rules/host-python3.in
>> index e15b90571..64f34affa 100644
>> --- a/rules/host-python3.in
>> +++ b/rules/host-python3.in
>> @@ -6,6 +6,7 @@ config HOST_PYTHON3
>>         select HOST_LIBFFI
>>         select HOST_OPENSSL
>>         select HOST_ZLIB                if HOST_PYTHON3_ZLIB
>> +       select HOST_BZIP2               if HOST_PYTHON3_BZIP2
>>         default y if ALLYES
>>         help
>>           Python is an interpreted, interactive,
>> @@ -16,4 +17,7 @@ if HOST_PYTHON3
>>  config HOST_PYTHON3_ZLIB
>>         bool
>>  
>> +config HOST_PYTHON3_BZIP2
>> +       bool
>> +
>>  endif
>> diff --git a/rules/nodejs.in b/rules/nodejs.in
>> index 80c6aec21..c75480953 100644
>> --- a/rules/nodejs.in
>> +++ b/rules/nodejs.in
>> @@ -3,7 +3,8 @@
>>  config NODEJS
>>         tristate
>>         prompt "Node.js                       "
>> -       select HOST_SYSTEM_PYTHON3
>> +       select HOST_PYTHON3
>> +       select HOST_PYTHON3_BZIP2
>>         select HOST_QEMU
>>         select HOST_QEMU_USR
>>         select C_ARES
>> 
>> 
>
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