#11722: document the SAGE_PARALLEL_SPKG_BUILD environment variable
-------------------------------------------+--------------------------------
Reporter: mderickx | Owner: mvngu
Type: enhancement | Status: positive_review
Priority: minor | Milestone: sage-4.7.2
Component: documentation | Keywords: sd32
Work_issues: | Upstream: N/A
Reviewer: Simon Spicer, John Palmieri | Author: Maarten Derickx
Merged: | Dependencies:
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Old description:
> It's very usefull in speeding up building but is documented nowhere!
>
> Apply:
>
> - [attachment:11722-document-SAGE_PARALLEL_SPKG_BUILD_2.0.patch]
> - [attachment:11722-referee.patch]
>
> to the Sage root repo.
New description:
It's very useful in speeding up building but isn't documented anywhere!
----
Apply:
- [attachment:11722-document-SAGE_PARALLEL_SPKG_BUILD_2.0.patch]
- [attachment:11722-referee.patch]
to the '''Sage root repository'''.
--
Comment(by leif):
Setting `MAKE` without setting `SAGE_PARALLEL_SPKG_BUILD=yes` can
(currently) have strange effects, so in principle one shouldn't set one
without setting the other.
`-j` is an option to GNU `make`, which isn't mentioned in the `README.txt`
at all. (Sage is unlikely to build with any other `make`.)
Btw, `SAGE_PARALLEL_SPKG_BUILD` ''is'' documented in the
[http://sagemath.org/doc/installation/source.html#environment-variables
Sage Installation Guide], which is referenced from the `README.txt`,
though not prominently.
Also, the Sage library is built in parallel even if `MAKE` is '''not'''
set (which I consider a bug).
Cf. #11622.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11722#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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