add the Cephes spkg to Cygwin

[mwhansen]

On Cygwin, Sage needs c99 complex support which can be provided by the cephes library from netlib.org / www.moshier.net

There is an spkg at http://sage.math.washington.edu/home/mhansen/cygwin_port/cephes-2.8.spkg

We need to decide the best way to include this since it is only need on Cygwin (and maybe FreeBSD, etc.).

CC: @peterjeremy

Component: porting: Cygwin

Author: Mike Hansen

Reviewer: William Stein

Merged: sage-4.4.3.alpha0

Issue created by migration from https://trac.sagemath.org/ticket/8780

[jasongrout]

comment:1

How about test the OS name in spkg-install, and if it is cygwin, do something, otherwise return successfully without doing anything?

[dimpase]

comment:2

Is it the same Solaris-only cvxopt problem that was solved (for cvxopt) by adding sun_complex.h there?
If yes, then it might be good to include Solaris in the list of architectures for which cephes is installed.

[mwhansen]

comment:3

Sorry, I spoke too soon -- this doesn't quite fix the problem with cvxopt since it doesn't check $SAGE_LOCAL/include. There is some other cleanup work that needs to be for the cvxopt-1.1.2 spkg as well.

Also, this is a little different than the Solaris issue since Cygwin doesn't have a complex.h, which is what the spkg provides.

[williamstein]

Reviewer: wstein

[williamstein]

Merged: 4.4.3.alpha0

[williamstein]

comment:4

I did what Jason Grout suggests above as a little referee patch, and merged this into 4.4.3.alpha0.

[sagetrac-mvngu]

Author: Jason Grout

[sagetrac-mvngu]

Changed reviewer from wstein to William Stein

[sagetrac-mvngu]

Changed merged from 4.4.3.alpha0 to sage-4.4.3.alpha0

[mwhansen]

Changed author from Jason Grout to Mike Hansen