Need to build sage as root for Slackware package

[cdu...@gmail.com]

Hello,

        I am the maintainer for the Slackware package of SageMath. They've recently instituted a policy that all packages must be built in /tmp, which makes things tricky with Sage, as the build directory might get removed at a later point, and Sage needs that. Previously I had just built in /opt/sage, set SAGE_ROOT=/opt/sage, and it worked fine (with some work on the path). I was also building as root (--enable-build-as-root), but everything worked fine. Now I cannot do this.

I've tried to play with --prefix=SAGE_LOCAL and --disable-editable (supposed to make a self-contained installation), but if I run SAGE_LOCAL/bin/sage I get

$ sage
Traceback (most recent call last):
  File "/tmp/SBo/sage-10.1/src/bin/sage-ipython", line 9, in <module>
    from sage.misc.banner import banner
ModuleNotFoundError: No module named 'sage'

That directory is the build directory (not SAGE_ROOT or SAGE_LOCAL), so something has gone wrong with the portable-ness. Possibly because I built as root, for sure.

So is there a solution here? The installation manual does not help a lot with this, I need to build a portable installation as root - or other ideas, like how to fix the error above, where the "portable installation" points to the build directory.

Thanks.

[Christopher Duston]

Ugh sorry my mistake, that's the error when running /opt/sage. The error when running from SAGE_LOCAL/bin/sage is

$ pwd
/tmp/SBo/package-sage/INSTALL/bin
$ ./sage
./sage: ././sage-config: /tmp/SBo/package-sage/INSTALL/bin/python3: bad interpreter: No such file or directory
./sage: ././sage-config: /tmp/SBo/package-sage/INSTALL/bin/python3: bad interpreter: No such file or directory
./sage: ././sage-venv-config: /tmp/SBo/package-sage/INSTALL/bin/python3: bad interpreter: No such file or directory
./sage: /tmp/SBo/package-sage/INSTALL/bin/sage-ipython: /tmp/SBo/package-sage/INSTALL/bin/python3: bad interpreter: No such file or directory
./sage: line 310: /tmp/SBo/package-sage/INSTALL/bin/sage-ipython: Success

And indeed. python3 is not in that folder - and not on my system, oops. Why did this install correctly before? Ok let me try --without-system-python3.

Oops: That option doesn't exist any more, contrary to this page: https://doc.sagemath.org/html/en/reference/spkg/python3.html

So I guess I'm trying --with-system-python3=no.....

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[Matthias Koeppe]

The Sage distribution does not support relocation after build and also not DESTDIR-style staged installation.

See https://github.com/sagemath/sage/issues/36860#issuecomment-1854730246 for the suggested method for downstream packaging of Sage.

[Dima Pasechnik]

You may also try
https://github.com/sagemath/binary-pkg

to rewrite paths etc. We used to build binary packages using this tool, packages you can install into any prefix.


No ./configure options would help you here.
It's actually less remapping hassle to use as many system packages as possible.