[Gambas-user] Gambas and NVidia

[Brian Snipes]

I run Gentoo 1.4rc2 with QT 3.1.0, KDE 3.1, XFree 4.3.0 and NVidia
drivers v3123.  On my system Gambas wouldn't run at all. It would
segfault (see previous post for traces).  The NVidia problems that some
people got me thinking and I decided to try a utility that is available
on Gentoo called 'opengl-update' that lets you switch between the OpenGL
implementations for NVidia and XFree86. To make a long story short when
I choose the XFree86 GL version I don't get the gambas segfault only
with the NVidia GL.  The KDE GL screensavers and the OpenGL games run
fine with either one.  I am not replacing NVidia as my Xserver driver -
only the OpenGL pieces.

The following is the help note from the utility and also the text of the
utility itself.

Brian

-----------------

opengl-update -h
usage: opengl-update <GL implementation>

note:
       This utility switch between OpenGL implementations.  Currently
there
       are two supported implementations, namely "xfree" and "nvidia",
the
       implementations for XFree86 and the NVidia drivers respectively.

examples:
       opengl-update xfree
       This will setup things to use libGL.so from XFree86

       opengl-update nvidia
       This will setup things to use libGL.so from the NVidia drivers.

-------------------

#!/bin/bash
# Copyright 1999-2002 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License, v2 or
later
# Author:  Martin Schlemmer <azarah at ...89...>
# $Header:
/home/cvsroot/gentoo-x86/x11-base/opengl-update/files/opengl-update-1.5,v 1.1 2002/12/31 21:19:22 azarah Exp $


source /etc/init.d/functions.sh

if [ `id -u` -ne 0 ]
then
	eerror "${0}: must be root."
	exit 1
fi

usage() {
cat << FOO
usage: opengl-update <GL implementation>

note:  
       This utility switch between OpenGL implementations.  Currently
there
       are two supported implementations, namely "xfree" and "nvidia",
the
       implementations for XFree86 and the NVidia drivers respectively.

examples:
       opengl-update xfree
       This will setup things to use libGL.so from XFree86

       opengl-update nvidia
       This will setup things to use libGL.so from the NVidia drivers.
	   
FOO
	exit 1
}

if [ "$#" -ne 1 -a "$#" -ne 2 ] || [ "$#" -eq 2 -a "$1" != "--use-old" ]
then
	usage
fi

GL_IMPLEM=""

# Only use specified implementation if it is not already selected.
if [ "$1" = "--use-old" ]
then
	shift

	if [ -f /etc/env.d/09opengl ]
	then
		source /etc/env.d/09opengl
		if [ -n "${LDPATH}" ]
		then
			GL_IMPLEM="${LDPATH/\/usr\/lib\/opengl\/}"
			GL_IMPLEM="${GL_IMPLEM/\/lib}"
			unset LDPATH
		fi
	fi
	
	if [ -z "${GL_IMPLEM}" ]
	then
		GL_IMPLEM="$1"
	fi
else
	GL_IMPLEM="$1"
fi
if [ ! -d /usr/lib/opengl/${GL_IMPLEM} ]
then
	usage
else
	ebegin "Switching to ${GL_IMPLEM} OpenGL interface"

	#setup the $LDPATH
	echo "LDPATH=/usr/lib/opengl/${GL_IMPLEM}/lib" >/etc/env.d/09opengl
	/usr/sbin/env-update &>/dev/null

	#setup the /usr/lib/libGL.so symlink
	if [ -e /usr/lib/libGL.so ]
	then
		rm -f /usr/lib/libGL.so
	fi
	if [ -e /usr/lib/libGL.so.1 ]
	then
		rm -f /usr/lib/libGL.so.1
	fi
	realname="$(readlink /usr/lib/opengl/${GL_IMPLEM}/lib/libGL.so)"
	ln -sf /usr/lib/opengl/${GL_IMPLEM}/lib/${realname} \
		/usr/lib/libGL.so
	ln -sf /usr/lib/opengl/${GL_IMPLEM}/lib/${realname} \
		/usr/lib/libGL.so.1

	#setup the /usr/X11R6/lib/libMesaGL.so symlink
	if [ -e /usr/X11R6/lib/libMesaGL.so ]
	then
		rm -f /usr/X11R6/lib/libMesaGL.so
	fi
	realname="$(readlink /usr/lib/opengl/${GL_IMPLEM}/lib/libGL.so)"
	ln -sf /usr/lib/opengl/${GL_IMPLEM}/lib/${realname} \
		/usr/X11R6/lib/libMesaGL.so

	#setup the /usr/lib/libGLcore.so symlink
	if [ -e /usr/lib/libGLcore.so ]
	then
		rm -f /usr/lib/libGLcore.so
	fi
	if [ -e /usr/lib/libGLcore.so.1 ]
	then
		rm -f /usr/lib/libGLcore.so.1
	fi
	if [ -e /usr/lib/opengl/${GL_IMPLEM}/lib/libGLcore.so ]
	then
		realname="$(readlink /usr/lib/opengl/${GL_IMPLEM}/lib/libGLcore.so)"
		ln -sf /usr/lib/opengl/${GL_IMPLEM}/lib/${realname} \
			/usr/lib/libGLcore.so
		ln -sf /usr/lib/opengl/${GL_IMPLEM}/lib/${realname} \
			/usr/lib/libGLcore.so.1
	fi

	#setup the /usr/X11R6/lib/modules/extensions/libglx.so symlink
	if [ -e /usr/X11R6/lib/modules/extensions/libglx.so ]
	then
		rm -f /usr/X11R6/lib/modules/extensions/libglx.so
	fi
	if [ -e /usr/lib/opengl/${GL_IMPLEM}/extensions/libglx.so ]
	then
		ln -sf /usr/lib/opengl/${GL_IMPLEM}/extensions/libglx.so \
			/usr/X11R6/lib/modules/extensions/libglx.so
	fi
	#setup the /usr/X11R6/lib/modules/extensions/libglx.a symlink
	if [ -e /usr/X11R6/lib/modules/extensions/libglx.a ]
	then
		rm -f /usr/X11R6/lib/modules/extensions/libglx.a
	fi
	if [ -e /usr/lib/opengl/${GL_IMPLEM}/extensions/libglx.a ]
	then
		ln -sf /usr/lib/opengl/${GL_IMPLEM}/extensions/libglx.a \
			/usr/X11R6/lib/modules/extensions/libglx.a
	fi

	#setup the includes
	for x in gl.h glx.h glxtokens.h
	do
		if [ -e /usr/X11R6/include/GL/${x} ]
		then
			rm -f /usr/X11R6/include/GL/${x}
		fi
		ln -sf /usr/lib/opengl/${GL_IMPLEM}/include/${x} \
			/usr/X11R6/include/GL/${x}
	done

	eend 0
fi


# vim:ts=4