[GRASS-user] configure no longer finds opengl

[Hamish]

> Seb wrote:
> > | configure:11476: checking for glBegin in -lGL
> > | configure:11493: gcc -o conftest -g -Wall    -L/usr/lib64 
> -Wl,--export-dynamic  -L/usr/lib64 conftest.c -lGL   -lSM -lICE -lX11  -lm  
> 1>&5
> > | /usr/bin/ld: cannot find -lGL
Glynn:
> I was assuming that it was going to be more involved than that;
> failure to detect a library is often due to missing dependencies
> (rather than the library itself).
> 
> Somewhere on your system should be a library named e.g. libGL.so.1.2. 
> There should also be a symlink to this file, named libGL.so.

Is the libgl1-mesa-dev package installed? It provides that.

In general you can check the control file in DebianGIS SVN to see what packages
are needed to build GRASS with the latest Debian/unstable:
  http://svn.debian.org/wsvn/pkg-grass/packages/grass/trunk/debian/?rev=0&sc=0

The rules file is good to get a working ./configure line.


apt-file is a nice Debian tool for finding which pacakge(s) contains the
missing library. If multiple packages are listed for the same file, you can
expect they will conflict with each other.

#the following is for Etch not unstable!
$ apt-file search libGL.so
fglrx-driver: usr/lib/libGL.so.1
fglrx-driver: usr/lib/libGL.so.1.2
libgl1-mesa-dev: usr/lib/libGL.so
libgl1-mesa-glide3: usr/lib/i686/mmx/cmov/libGL.so.1
libgl1-mesa-glide3: usr/lib/i686/mmx/cmov/libGL.so.1.5.060201
libgl1-mesa-glide3: usr/lib/libGL.so.1
libgl1-mesa-glide3: usr/lib/libGL.so.1.5.060201
libgl1-mesa-glide3-dev: usr/lib/i686/mmx/cmov/libGL.so
libgl1-mesa-glide3-dev: usr/lib/libGL.so
libgl1-mesa-glx: usr/lib/libGL.so.1
libgl1-mesa-glx: usr/lib/libGL.so.1.2
libgl1-mesa-swx11: usr/lib/i686/cmov/libGL.so.1
libgl1-mesa-swx11: usr/lib/i686/cmov/libGL.so.1.5.060501
libgl1-mesa-swx11: usr/lib/libGL.so.1
libgl1-mesa-swx11: usr/lib/libGL.so.1.5.060501
libgl1-mesa-swx11-dbg: usr/lib/debug/i686/cmov/libGL.so
libgl1-mesa-swx11-dbg: usr/lib/debug/i686/cmov/libGL.so.1
libgl1-mesa-swx11-dbg: usr/lib/debug/i686/cmov/libGL.so.1.5.060501
libgl1-mesa-swx11-dbg: usr/lib/debug/libGL.so
libgl1-mesa-swx11-dbg: usr/lib/debug/libGL.so.1
libgl1-mesa-swx11-dbg: usr/lib/debug/libGL.so.1.5.060501
libgl1-mesa-swx11-dev: usr/lib/i686/cmov/libGL.so
libgl1-mesa-swx11-dev: usr/lib/libGL.so
lsb-build-base2: usr/lib/lsb2/libGL.so
lsb-build-base3: usr/lib/lsb3/libGL.so
nvidia-glx: usr/lib/libGL.so.1
nvidia-glx: usr/lib/libGL.so.1.0.8776
nvidia-glx-legacy: usr/lib/libGL.so.1
nvidia-glx-legacy: usr/lib/libGL.so.1.0.7184
nvidia-glx-legacy-dev: usr/lib/libGL.so


 
> Going back to your original message:
> 
> > I can see /usr/lib/libGL.so.1, although there's also
> > /usr/lib64/libGL.so.1, and they're both a symlink to
> > /usr/lib/libGL.so.100.14.19. Any help would be appreciated.
> 
> you don't mention the libGL.so symlink, so I would guess that it's
> missing. This symlink is needed for compilation, but not at run time.
> 
> The unversioned .so symlinks are normally included in the development
> package (e.g. "opengl-devel") along with the headers. If you already
> have the headers, the missing symlink may to be due to a botched
> package management operation.
> 
> [A Google search on libGL.so.100.14.19 suggests that this is nVidia's
> proprietary OpenGL library. nVidia's OpenGL packaging leaves a lot to
> be desired.]
> 
> In any case, it should suffice to just add the symlink, manually e.g.:
> 
> 	ln -s libGL.so.1 /usr/lib64/libGL.so

Those tricks are almost never needed in Debian, you just have to install the
correct packages & then things work. e.g. I first installed Debian on my busy
development machine in Jan 2004 and still have not needed to add /usr/local/lib
to /etc/ld.so.conf or symlink to any library version. Actually, with Debian, I
have found using those tricks or trying to be smarter than the packagers
usually backfires.


Hamish



       
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