Singular does not build on Cygwin - static libs problem

[Dima Pasechnik]

Singular does not build on Cygwin because libkernel and libhtmlhelp are not found. Indeed an include path which is set to ../kernel on generic systems is set to /bin on Cygwin.

Use the spkg at ​http://perso.telecom-paristech.fr/~flori/sage/singular-3-1-5.p1.spkg which fixes this.

[Karl-Dieter Crisman]

The draft package is malformed somehow.

sage: After decompressing the directory singular-3-1-3-3.p1-cygwindraft does not exist
This means that the corresponding .spkg needs to be downloaded
again.

I think you have to name the spkg the same as the folder which is compressed. I'll try renaming the folder and trying it again.

[Dima Pasechnik]

Replying to kcrisman:

The draft package is malformed somehow.

sage: After decompressing the directory singular-3-1-3-3.p1-cygwindraft does not exist
This means that the corresponding .spkg needs to be downloaded
again.

I think you have to name the spkg the same as the folder which is compressed. I'll try renaming the folder and trying it again.

rather, just rename the spkg file to singular-3-1-3-3.p1.spkg

[Karl-Dieter Crisman]

This works.

$ ./sage -singular
                     SINGULAR                                 /  Development
 A Computer Algebra System for Polynomial Computations       /   version 3-1-3
                                                           0<
 by: W. Decker, G.-M. Greuel, G. Pfister, H. Schoenemann     \   March 2011
FB Mathematik der Universitaet, D-67653 Kaiserslautern        \
> 2+2
. ;
4

Make it a proper spkg and let's get it in.

[Karl-Dieter Crisman]

For review purposes only

[Karl-Dieter Crisman]

I've done exactly that same thing in making spkgs before! Spkg is updated at ​singular-3-1-3-3.p2.spkg. The new patch only is applied on Cygwin. Diff attached for reference in review.

Dima, I'll test this just now, but if it builds, then I think it would just require you to sign off on it.

Dima or Volker or someone, can you report this upstream?

[Jean-Pierre Flori]

I don't really agree with the solution developed here.

My guess is that the Makefile.in is just broken because a -L../kernel on generic system got transformed into -L/bin.

I'll post an updated spkg based on the updated Singular spkg by Jeroen at #13237 with that approach when my new build on Cygwin fails at Singular. I'll report upstream as well.

[Jean-Pierre Flori]

You can try the spkg available at: ​http://perso.telecom-paristech.fr/~flori/sage/singular-3-1-5.p1.spkg

As it is based on the spkg from #13237 which has uncommitted changes, I've not committed anything yet either. However I'll attached the diffs here.

[Jean-Pierre Flori]

Diff between the p0 and p1 spkgs, for review only.

[Alexander Dreyer]

There will be a likewise patch upstream, see here: ​https://github.com/alexanderdreyer/SingularSources/commit/7902222c6e73d452b3d75576bd9bc0140f5e827a Despite the slight differences I can get a positive review for your patch. (Edit: Sorry, wrong link! Fixed now.)

[Jean-Pierre Flori]

Thanks, the updated link makes more sense :)

We could also close this ticket and directly integrate your patch into Jeroen spkg from #13237 (which already includes other patches from singular trac/your github(? don't know the relation between them)). Anyway, even if we don't, we'll have for Jeroen skpg to get positive review.

[Jeroen Demeyer]

I guess adding one more patch to #13237 doesn't hurt...

[Alexander Dreyer]

Replying to jdemeyer:

I guess adding one more patch to #13237 doesn't hurt...

I think I can give the spkg changes in #13237 immediately, after that patch was added. For this sage library patch, I'll have to take a closer look.

[Jeroen Demeyer]

(never mind, wrong ticket)

[Jeroen Demeyer]

This should be fixed by #13237. This ticket still needs_review for the fact that #13237 fixes it.

[Jean-Pierre Flori]

This is indeed fixed on Cygwin and still builds on Linux (Ubuntu 12.04 x86_64). So positive review.