A bunch of Sage library cython files are underlinked.

[jpflori]

In particular, we need explicit linking at build time for Cygwin.

CC: @tscrim

Component: porting: Cygwin

Keywords: cygwin linking

Author: Jean-Pierre Flori

Branch: fbf812d

Reviewer: Jeroen Demeyer

Issue created by migration from https://trac.sagemath.org/ticket/17342

[jpflori]

New commits:

fbf812d

Some Sage library files are underlinked.

[jpflori]

Changed keywords from none to cygwin linking

[jpflori]

Branch: u/jpflori/ticket/17342

[jpflori]

Author: Jean-Pierre Flori

[jpflori]

Commit: fbf812d

[jdemeyer]

Reviewer: Jeroen Demeyer

[jdemeyer]

comment:3

I didn't test on Cygwin, but at least the patch makes sense and doesn't break anything for me.

[vbraun]

Changed branch from u/jpflori/ticket/17342 to fbf812d

[sagetrac-Stefan]

Changed commit from fbf812d to none

[sagetrac-Stefan]

comment:5

I notice some of the matroid extensions got gmp as extra library. How do I determine that this is necessary? The code runs fine on my computer with and without gmp, I think. Without a way to tell, I'll get it wrong on future extensions.

[jpflori]

comment:6

I'd say:

• either look in the source code for gmp function (here it is typically mpn_popcnt or mpn_copyi),
• or run ldd | grep U on the built object files and look for symbols with gmp in it,
• or try to compile it under a cery touchy platform as Cygwin :)