[ECOS] Re: ecos-2.0, configtool and libpng

[John Dallaway <jld at ecoscentric dot com>]

Hi John

John Carter wrote:

> We are using Mandrake 9.1 and have just d/loaded ecos-2.0 and have found
> to our sorrow that configtool doesn't work.
> 
> The problem is the version of libpng. Here is the output of
> "ldd configtool"...
> 
> ldd configtool
>         libgtk-1.2.so.0 => /usr/lib/libgtk-1.2.so.0 (0x40025000)
>         libgdk-1.2.so.0 => /usr/lib/libgdk-1.2.so.0 (0x40171000)
>         libgmodule-1.2.so.0 => /usr/lib/libgmodule-1.2.so.0 (0x401aa000)
>         libgthread-1.2.so.0 => /usr/lib/libgthread-1.2.so.0 (0x401ae000)
>         libglib-1.2.so.0 => /usr/lib/libglib-1.2.so.0 (0x401b1000)
>         libpthread.so.0 => /lib/i686/libpthread.so.0 (0x401d9000)
>         libdl.so.2 => /lib/libdl.so.2 (0x40229000)
>         libXi.so.6 => /usr/X11R6/lib/libXi.so.6 (0x4022c000)
>         libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0x40234000)
>         libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x40243000)
>         libpng.so.2 => not found
>         libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0x40322000)
>         libtiff.so.3 => /usr/lib/libtiff.so.3 (0x40343000)
>         libm.so.6 => /lib/i686/libm.so.6 (0x40388000)
>         libc.so.6 => /lib/i686/libc.so.6 (0x403aa000)
>         /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
>         libz.so.1 => /lib/libz.so.1 (0x404de000)
> 
> Compare that with the output of ldd for ecos-2.0b1 configtool
> ldd configtool
>         libgtk-1.2.so.0 => /usr/lib/libgtk-1.2.so.0 (0x40025000)
>         libgdk-1.2.so.0 => /usr/lib/libgdk-1.2.so.0 (0x40171000)
>         libgmodule-1.2.so.0 => /usr/lib/libgmodule-1.2.so.0 (0x401aa000)
>         libgthread-1.2.so.0 => /usr/lib/libgthread-1.2.so.0 (0x401ae000)
>         libglib-1.2.so.0 => /usr/lib/libglib-1.2.so.0 (0x401b1000)
>         libpthread.so.0 => /lib/i686/libpthread.so.0 (0x401d9000)
>         libdl.so.2 => /lib/libdl.so.2 (0x40229000)
>         libXi.so.6 => /usr/X11R6/lib/libXi.so.6 (0x4022c000)
>         libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0x40234000)
>         libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x40243000)
>         libm.so.6 => /lib/i686/libm.so.6 (0x40322000)
>         libc.so.6 => /lib/i686/libc.so.6 (0x40344000)
>         /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
> 
> Mandrake 9.1 only supplies...
> locate lib/libpng
> /usr/lib/libpng.so.3
> /usr/lib/libpng.so.3.1.2.5
> /usr/lib/libpng12.so.0
> /usr/lib/libpng12.so.0.1.2.5
> /usr/lib/libpng.so
> /usr/lib/libpng12.so
> 
> What suggestions?

The difference between 2.0b1 and 2.0 builds of the configtool arises from 
the move to a much more recent version of wxWindows. You could try creating 
a symbolic link named /usr/lib/libpng.so.2 which points to libpng.so.3 but 
this will only work if the libpng.so.3 API is strictly backwards compatible 
with libpng.so.2. Otherwise, you could try building you own libpng 1.0.x 
from source code. Finally, you could build wxWindows 2.4.0 and the 
configtool from source under Mandrake 9.1. Details at:

  http://www.ecoscentric.com/devzone/configtool.shtml

Actually, it is helpful to know that this compatibility issue exists. Please 
let me know whether the symbolic link works or not.

John Dallaway
eCosCentric Limited


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