cygwin: gd doesn't correctly link in libpng with sage-4.4.3.

[williamstein]

The fix involves copying over $SAGE_LOCAL/bin/cygpng12-0.dll to $SAGE_LOCAL/lib/

Component: porting: Cygwin

Author: Mike Hansen

Reviewer: William Stein

Merged: sage-4.4.4.alpha0

Issue created by migration from https://trac.sagemath.org/ticket/9146

[mwhansen]

comment:1

There is an spkg at http://sage.math.washington.edu/home/mhansen/libpng-1.2.35.p2.spkg

[mwhansen]

Author: Mike Hansen

[williamstein]

comment:2

I tried installing on linux and:

make[2]: Leaving directory `/mnt/usb1/scratch/wstein/build/sage-4.4.3.rc0/spkg/build/libpng-1.2.35.p2/src'
make[1]: Leaving directory `/mnt/usb1/scratch/wstein/build/sage-4.4.3.rc0/spkg/build/libpng-1.2.35.p2/src'
./spkg-install: line 55: syntax error near unexpected token `fi'
./spkg-install: line 55: `fi'

[williamstein]

comment:3

Fixed version:
http://sage.math.washington.edu/home/wstein/patches/libpng-1.2.35.p2.spkg

[williamstein]

comment:5

It doesn't work yet on Cygwin itself (on a clean install):

make[2]: Leaving directory `/home/wstein/sage-4.4.3/spkg/build/libpng-1.2.35.p2/src'
cp: cannot stat `/home/wstein/sage-4.4.3/local/bin/cygpng12-0.dll': No such file or directory
Error installing libpng

real    6m25.233s
user    1m28.601s
sys     4m59.953s

[williamstein]

comment:6

The above failure report is on cygwin upgraded to the latest version as of june 4, 2010.

[mwhansen]

comment:7

The build completes successfully once "file" is installed in winxp3. If "file" is not installed, then Cygwin has a difficult time making shared libraries. This is why this wasn't an issue initially with my sage-4.3.5 install in winxp2.

We need to make "file" a preqreq.

[williamstein]

comment:8

Yes, winxp3 is missing a lot of prerequisites. MPIR also fails to build there.

[mwhansen]

Reviewer: William Stein

[mwhansen]

Merged: sage-4.4.4.alpha0