#21114: ATLAS spkg doesn't need /Sage's/ python to build
-------------------------------------------------+-------------------------
Reporter: leif | Type:
| enhancement
Status: new | Priority: minor
Milestone: sage-7.3 | Component: packages:
Keywords: sage-spkg dependencies spkg- | standard
install | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Since we meanwhile require a ''system'' python to let Sage build anyway,
we don't have to wait with building ATLAS until Sage's python has been
built, as ATLAS doesn't install any Python libraries, but only its `spkg-
install` has been rewritten in Python quite a while ago.
This requires two things:
* Remove the dependency of ATLAS on `$(PYTHON)` (which means Sage's
`python2` or `python3` package) in its `dependencies`.
* Make ATLAS' `spkg-install` again a shell script, renaming the current
one to `spkg-install.py`, say, where the shell script just contains
{{{
#!sh
#!/bin/sh
exec python spkg-install.py
}}}
This is necessary because `sage-spkg` checks whether ''Sage's''
`python` is already installed if an `spkg-install` script starts with `#!
... python`, and bails out otherwise:
{{{
atlas-3.10.2.p2
====================================================
Setting up build directory for atlas-3.10.2.p2
Finished set up
Error: The spkg-install script is written in Python, but the Python
package is not yet installed in Sage. You should add $(PYTHON)
as dependency in build/pkgs/atlas/dependencies
make[2]: *** [.../sage/local/var/lib/sage/installed/atlas-3.10.2.p2] Error
1
}}}
(Note that this message originates from a build where the `Makefile` was
broken, such that the `make` dependency of ATLAS on the python package was
fulfilled by `$(PYTHON)` accidentally being empty. So one won't get this
message unless the `Makefile` is corrupted.)
----
Rather orthogonal to that, our top-level `configure` doesn't contain any
check for `python` yet, although currently at least `sage-download-file`
and `sage-uncompress-spkg` require (a system) python (in the beginning of
the build). I'll address that on another ticket.
--
Ticket URL: <https://trac.sagemath.org/ticket/21114>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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