Hi,

I tried following previous archived threads which said the solution to this problem was to provide the path to  PYTHON_CONFIG and not using a conda environment.

I am not using a conda environment and am providing the path in the scons command:

scons ./build/ARM_MESI_Three_Level/gem5.opt PYTHON_CONFIG=/usr/bin/python-config
scons: Reading SConscript files ...
Mkdir("/data/anurag/gem5-public/build/ARM_MESI_Three_Level/gem5.build")
Checking for linker -Wl,--as-needed support... (cached) yes
Checking for compiler -Wno-free-nonheap-object support... (cached) yes
Checking for compiler -gz support... (cached) yes
Checking for linker -gz support... (cached) yes
Info: Using Python config: python3-config
Checking for C header file Python.h... (cached) yes
Checking Python version... no
Error: Can't find a working Python installation

I have been able to build gem5 on this very machine before, I’m not sure what changed between then and now. Can someone help me debug this?

Regards,
Anurag

Hi Anurag

On 15/03/2023 12:57, Kar, Anurag Arunkumar via gem5-users wrote:
Hi,

I tried following previous archived threads which said the solution to this problem was to provide the path to  PYTHON_CONFIG and not using a conda environment.

I am not using a conda environment and am providing the path in the scons command:

scons ./build/ARM_MESI_Three_Level/gem5.opt PYTHON_CONFIG=/usr/bin/python-config
scons: Reading SConscript files ...
Mkdir("/data/anurag/gem5-public/build/ARM_MESI_Three_Level/gem5.build")
Checking for linker -Wl,--as-needed support... (cached) yes
Checking for compiler -Wno-free-nonheap-object support... (cached) yes
Checking for compiler -gz support... (cached) yes
Checking for linker -gz support... (cached) yes
Info: Using Python config: python3-config
Checking for C header file Python.h... (cached) yes
Checking Python version... no
Error: Can't find a working Python installation

It seems like SCons is able to find the Python.h header file but it is not able to gather the python version of the interpreter for whatever reason (check CheckPythonLib). When I have these sporadic errors I usually remove the build folder and start a clean build. If the error is still present, you might want to debug CheckPythonLib with pdb.

If you don't want to do any debugging, you should consider using docker 1

Hope it helps

Giacomo

I have been able to build gem5 on this very machine before, I’m not sure what changed between then and now. Can someone help me debug this?

Regards,
Anurag

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So, Eliot’s response didn’t work for me. But Giacomo’s did which is to just delete the build folder and start afresh (a bit inconvenient if I only had incremental changes over my previous build).

Before I got the responses, I tried hardcoding the python version (received by doing python –version in my terminal) into the SConstruct file, and that….worked. I’m not sure if that is the right way to go about this though.

Regards,
Anurag

From: Giacomo Travaglini giacomo.travaglini@arm.com
Date: Wednesday, March 15, 2023 at 9:28 AM
To: The gem5 Users mailing list gem5-users@gem5.org
Cc: Kar, Anurag Arunkumar akar34@gatech.edu
Subject: Re: [gem5-users] Error: Can't find a working Python installation redux

Hi Anurag
On 15/03/2023 12:57, Kar, Anurag Arunkumar via gem5-users wrote:
Hi,

I tried following previous archived threads which said the solution to this problem was to provide the path to  PYTHON_CONFIG and not using a conda environment.

I am not using a conda environment and am providing the path in the scons command:

scons ./build/ARM_MESI_Three_Level/gem5.opt PYTHON_CONFIG=/usr/bin/python-config
scons: Reading SConscript files ...
Mkdir("/data/anurag/gem5-public/build/ARM_MESI_Three_Level/gem5.build")
Checking for linker -Wl,--as-needed support... (cached) yes
Checking for compiler -Wno-free-nonheap-object support... (cached) yes
Checking for compiler -gz support... (cached) yes
Checking for linker -gz support... (cached) yes
Info: Using Python config: python3-config
Checking for C header file Python.h... (cached) yes
Checking Python version... no
Error: Can't find a working Python installation

It seems like SCons is able to find the Python.h header file but it is not able to gather the python version of the interpreter for whatever reason (check CheckPythonLib). When I have these sporadic errors I usually remove the build folder and start a clean build. If the error is still present, you might want to debug CheckPythonLib with pdb.

If you don't want to do any debugging, you should consider using docker 1

Hope it helps

Giacomo

I have been able to build gem5 on this very machine before, I’m not sure what changed between then and now. Can someone help me debug this?

Regards,
Anurag

gem5-users mailing list -- gem5-users@gem5.orgmailto:gem5-users@gem5.org

To unsubscribe send an email to gem5-users-leave@gem5.orgmailto:gem5-users-leave@gem5.org
IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.