Build Failure: Cython CompileError in pari/convert_sage.pyx (pari_PRIMES) (develop branch)

[Ashutosh Rajora]

Hello ,

I was working on an issue,  I've set up my environment, cloned the repository, and followed the developer guide to prepare for making changes.

After creating a new branch (fix-limit-syntax-38761) from the develop branch and applying the necessary code changes to src/sage/calculus/calculus.py, I encountered a build failure when running ./sage -br.

The core error seems unrelated to my changes :

[sagelib-10.6.rc0] [spkg-install] sage/libs/pari/convert_sage.pyx:578:10: undeclared name not builtin: pari_PRIMES [sagelib-10.6.rc0] [spkg-install] Exception while cythonizing source files: CompileError(None, 'sage/libs/pari/convert_sage.pyx') ... [sagelib-10.6.rc0] [spkg-install] Cython.Compiler.Errors.CompileError: sage/libs/pari/convert_sage.pyx

To check whether the error coming was due to the changes i made in the calculus file i did the following:

1. Ran make sagelib-clean and then ./sage -br. The error persisted.

2. Used git stash to temporarily remove my changes to src/sage/calculus/calculus.py and ran ./sage -br again. The same error occurred, Restored my changes (git stash pop).

3. Ran make clean and then ./sage -br. The error persisted.

4. Updated my local develop branch (git checkout develop &  git pull upstream develop).

5. Switched back to my feature branch (git checkout fix-limit-syntax-38761).

6. Committed my changes to calculus.py.

7. Rebased my branch onto the updated develop branch (git rebase develop).

8. Ran ./sage -br again. The error persisted.
   
   My build environment details are:

• Operating System: Ubuntu 22.04.4 LTS (running on WSL2 )

• Python: 3.12.5 (from Sage's venv)

• GCC: 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04)
  
  
  Could someone please provide guidance on how to resolve this build issue related to pari_PRIMES in sage/libs/pari/convert_sage.pyx?

I have attached the relevant log files:

• logs/pkgs/sagelib-10.6.rc0.log 

• config.log

[Antonio Rojas]

Can you post the pari and cypari build logs too?

[Ashutosh Rajora]

Sure, here they are :

[Antonio Rojas]

This doesn't match what your config.log says:

[...]

real_configure:113712: result: cypari: no suitable system package; standard, installed SPKG version 2.2.0 will be replaced by version 2.2.1 [...]

real_configure:145677: result: pari: installed SPKG version 2.15.5 will be replaced by version 2.17.1 [...]

Are those logs from your current installation attempt?

[Ashutosh Rajora]

well i am not sure, they should be, how do i confirm this ?

[Ashutosh Rajora]

I faced an issue while building Sage from source 2-3 weeks, what i ended up doing was that whenever i used to face any error while build i used to delete things and then again run build, so probably this could have caused some inconsistency or incompatibility related to the PARI upgrade ??

[Ashutosh Rajora]

woahh, now it seems the build is broken and even sage is not working, do i need to build it again?

[Dima Pasechnik]

clean up the repo:

   git clean -fdx

then update the branch

   git pull

and build again

[Ashutosh Rajora]

Sir, thanks a lot for the fix, it worked.

Successfully raised a PR for the issue i was working on

Thanks,