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====== Introduction ======

This document is ment as a simple howto for installing [[http://archive.eso.org/cms/tools-documentation/skycat|ESO SkyCat Tool]] on Debian and Ubuntu systems. It surely is not comprehensive nor authoritative, it's rather the simple description of "how we did it". But it still may come in handy ;-).

The original version from Petr Kubanek was only for Ubuntu 08.10, now it's extended to Debian 4.0 Etch, Debian 5.0 Lenny and Ubuntu 09.04.

====== Downloads ======

From [[http://archive.eso.org/cms/tools-documentation/eso-skycat-download|Skycat download]] get skycat sources. As TclTk sources are included in Debian, you don't need them!

Then install required libraries:

  * Ubuntu <= 08.10:
<code bash>
user@host:~$ wget http://archive.eso.org/cms/tools-documentation/skycat-download/skycat-3.0.2.src.tar.gz
user@host:~$ sudo apt-get install tcl8.4-dev tk8.4-dev blt-dev itcl3.1-dev itk3.1-dev tclx8.4
</code>

  * Ubuntu 09.04:
<code bash>
user@host:~$ wget http://archive.eso.org/cms/tools-documentation/skycat-download/skycat-3.0.2.src.tar.gz
user@host:~$ sudo apt-get install tcl8.5-dev tk8.5-dev blt-dev itcl3-dev itk3-dev
</code>
  * Debian:
<code bash>
user@host:~$ wget http://archive.eso.org/cms/tools-documentation/skycat-download/skycat-3.0.2.src.tar.gz
user@host:~$ sudo apt-get install tcl8.4-dev tk8.4-dev blt-dev itcl3-dev itk3-dev tclx8.4 iwidgets4 x11proto-xext-dev libxext-dev
</code>

====== Patching ======

  * Ubuntu & Debian:
If you installed tcl8.4:
<code bash>
user@host:~$ tar -xzf skycat-3.0.2.src.tar.gz
user@host:~$ cd skycat-3.0.2/
user@host:~$ ./configure --with-tcl=/usr/lib/tcl8.4/ --with-tk=/usr/lib/tk8.4/ --with-tkinclude=/usr/include/tcl8.4/  --with-blt=/usr/lib
</code>

If you installed tcl8.5:
<code bash>
user@host:~$ tar -xzf skycat-3.0.2.src.tar.gz
user@host:~$ cd skycat-3.0.2/
user@host:~$ ./configure --with-tcl=/usr/lib/tcl8.5/ --with-tk=/usr/lib/tk8.5/ --with-tkinclude=/usr/include/tcl8.5/  --with-blt=/usr/lib
</code>

You will get error (libBLT24), which is expected. Now edit //tclutil/configure//, find **libBLT24** and replace this line:

<code>
    BLT_LIBNAME=libBLT24${SHLIB_SUFFIX}
    BLT_LIBFLAG=-lBLT24
</code>

with

<code>
    BLT_LIBNAME=libBLT${SHLIB_SUFFIX}
    BLT_LIBFLAG=-lBLT
</code>

Also if you installed tcl8.5, change 8.4 to 8.5 in //skycat/skycat.in//:

<code bash>
exec wish8.5 $SKYCAT_BASE/lib/skycat@PACKAGE_VERSION@/main.tcl ${1+"$@"} | tee -a $HOME/.skycat/log 2>&1
</code>

  * Seems as case only for Ubuntu and Debian 5.0 Lenny

You need to edit //cat/generic/AstroQuery.h// and put //#include <string.h>// to it, right after //#include <cstdio>//

<code c++>
#include <cstdio>
#include <string.h>
#include "WorldOrImageCoords.h"
</code>

Also edit //astrotcl/generic/ImageIO.h//, around line 307 should abs((float)bitpix_).. instead of abs( bitpix_):

<code c++>
    // reverse the effect of bzero and bscale
    double unScaleValue(double d) const {return (d-bzero_)/bscale_;}

    // return the size in bytes of a raw image pixel 
    int pixelSize() const {return abs((float) bitpix_)/8;}

    // member access
</code>

and in //rtd/generic/RtdImage.C// around line 915 add define for MODULE_SCOPE, so

<code c++>
// Fix for Tk clipping coordinates to short range: See CanvasWindowCoordsNoClip() below.
#ifdef HAVE_TKCANVAS_H
#include "tkCanvas.h"
#else
// The structure we need hasn't changed for a long time, so just include a local copy.
#include "tkCanvas.h-tk8.4.11"
#define HAVE_TKCANVAS_H 
#endif
</code>

becomes

<code c++>
#ifndef MODULE_SCOPE
#define MODULE_SCOPE extern
#endif

// Fix for Tk clipping coordinates to short range: See CanvasWindowCoordsNoClip() below.
#ifdef HAVE_TKCANVAS_H
#include "tkCanvas.h"
#else
// The structure we need hasn't changed for a long time, so just include a local copy.
#include "tkCanvas.h-tk8.4.11"
#define HAVE_TKCANVAS_H
</code>

  * Debian (seems to be not a problem in ubuntu?):
There is one more problem in these files:
  ./cat/configure
  ./rtd/configure
  ./tclutil/configure
  ./skycat/configure
  ./astrotcl/configure

It is the redundant single quote mark (') in the end of the line:
  system=MP-RAS-`awk '{print }' /etc/.relid'`

You can use this simple pipeline to repair it all:
<code bash>
for i in ./cat/configure ./rtd/configure ./tclutil/configure ./skycat/configure ./astrotcl/configure; do cp $i ${i}.orig; cat ${i}.orig | sed "s/\/etc\/\.relid'/\/etc\/.relid/" > $i; done
</code>

====== Make ======

  * Debian, Ubuntu <= 08.10:
<code bash>
user@host:~$ ./configure --with-tcl=/usr/lib/tcl8.4/ --with-tk=/usr/lib/tk8.4/ --with-tkinclude=/usr/include/tcl8.4/  --with-blt=/usr/lib
user@host:~$ make all
user@host:~$ sudo make install
</code>

  * Ubuntu 09.04:
<code bash>
user@host:~$ ./configure --with-tcl=/usr/lib/tcl8.5/ --with-tk=/usr/lib/tk8.5 --with-tkinclude=/usr/include/tcl8.5 --with-blt=/usr/lib
user@host:~$ make all
user@host:~$ sudo make install
</code>

====== Troubleshooting ======

Please write to [[petr@iaa.es]], and attach error description.