[Debian-science-sagemath] fpylll: dependency or dependencee of Sage ?

[François Bissey]

Well sage needs fpylll at runtime but not at build time.
fpylll can be configured to work “standalone” or with sage.
The standalone configuration doesn’t work from sage.
If fpylll needs to be configured with sage, sage has to be
installed. It needs the location of various .pxd and headers
files to do so.
That’s what the:
if have_sage:
   from sage.env import SAGE_SRC
   fplll["include_dirs"].append(SAGE_SRC)
   config_pxi.append("DEF HAVE_SAGE=True”)

does. Instead of import SAGE_SRC we could use SAGE_LIB for
a sage install rather sage’s sources. SAGE_LIB should
point to sage’s location in python’s site-packages folder.

François

> On 17/10/2016, at 11:56, Jerome BENOIT <calculus at rezozer.net> wrote:
> 
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> 
> Hello Forum,
> 
> I am on my way to package fpylll.
> 
> I thought that Sage depends on fpylll, but after reading the setup.py of fpylll,
> it rather appears that it is the reverse. We read:
> 
> # SAGE
> have_sage = False
> 
> try:
>    import sage
>    have_sage = True
> except ImportError:
>    pass
> 
> if have_sage:
>    from sage.env import SAGE_SRC
>    fplll["include_dirs"].append(SAGE_SRC)
>    config_pxi.append("DEF HAVE_SAGE=True")
> else:
>    config_pxi.append("DEF HAVE_SAGE=False")
> 
> 
> What is going on here ?
> 
> 
> Thanks in advance,
> Jerome
> 
> - -- 
> Jerome BENOIT | calculus+at-rezozer^dot*net
> https://qa.debian.org/developer.php?login=calculus@rezozer.net
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