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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.