Introduction to libglvnd
The libglvnd package provides
OpenGL implementations that dispatch API calls to a given driver
vendor. Some of the libraries are simply wrappers to the main
dispatcher.
![[Important]](../images/important.png)
Important
Read About OpenGL to decide if you want to install
OpenGL implementations from this provider.
libglvnd Dependencies
Recommended
Xorg
Libraries (for libGL and
libGLX)
Installation of libglvnd
Install libglvnd by running the following commands:
mkdir build &&
cd build &&
meson setup --prefix=/usr \
--buildtype=release \
-D gles1=false \
-D hgl=false \
.. &&
ninja
Now as the root user:
ninja install
lib32 Installation of libglvnd
Install lib32-libglvnd by running the following commands:
rm -rf * &&
CC="gcc -m32" CXX="g++ -m32" \
PKG_CONFIG_PATH=/usr/lib32/pkgconfig \
meson setup --prefix=/usr \
--libdir=/usr/lib32 \
--buildtype=release \
-D gles1=false \
-D hgl=false \
.. &&
ninja
Now as the root user:
DESTDIR=$PWD/DESTDIR ninja install &&
cp -vr DESTDIR/usr/lib32/* /usr/lib32 &&
rm -rf DESTDIR &&
ldconfig
Command Explanations
![[Note]](../images/note.png)
Note
Inspect meson_options.txt or
meson.options for a full list of
options.
--buildtype=release:
Specify a buildtype suitable for stable releases of the package, as
the default may produce unoptimized binaries.
-D gles1=false: This
disables an obsolete version of OpenGL ES.
-D hgl=false: This disables
targetting Haiku by default as this guide is for Linux, not Haiku.
-D gles2=false: If you don't need
OpenGL ES, use this option. Be sure to read the section
called “About GLES (OpenGL ES)”.
List of packages With Issues
While installing this package can help prevent a lot of issues down
the road, this package can come with some caveats and all of them
are in relation to BLFS. BLFS naturally expects that the only
OpenGL vendor is Mesa, so the
instructions will thus assume that this package has not been
installed. The following have known issues, and solutions:
-
Mesa: In BLFS, a patch is
listed in the Mesa
page and will instruct you to apply it. This will cause an
issue unless you explictly tell the build system not to link
against this package's libraries, which means having it build
its own OpenGL implementations, which will cause issues of
its own. The exact error the patch causes is a linking error
in the final set of steps when building the demos as it
expects functions that are not found in the specific
libraries from this package it tries to link against.
Either don't apply that patch or follow this book's Mesa-25.1.5
page instead. Thanks to Mesa's build system autodetecting if
libglvnd is installed, the
installation instructions don't change that much between this
book and BLFS. The main differences are lib32 support and not
listing the demos patch.
-
GLU: In BLFS, the GLU
page explictly sets the GL vendor to be Mesa as the build system will otherwise
expect libglvnd and
libOpenGL to be installed.
While the BLFS page instructions lead to a successful
compilation, the resulting library does not function
properly. You should follow the SLFS
GLU page instead. It also does check if the vendor is
Mesa.
Contents
Installed Programs:
None
Installed Libraries:
libEGL, libGL, libGLESv2, libGLX,
libGLdispatch, and libOpenGL
Installed Directories:
/usr/include/{EGL,GLES{2,3},glvnd,KHR}
Short Descriptions
|
libEGL
|
contains EGL window-system API functions
|
|
libGL
|
is the “legacy” OpenGL library; wrapper
library calling libGLdispatch and libGLX
|
|
libGLESv2
|
exposes OpenGL ES 2.x and 3.x entrypoints; wrapper
library calling libGLdispatch
|
|
libGLX
|
dispatches GLX extensions to the right vendor
|
|
libGLdispatch
|
dispatches OpenGL and TLS to the right vendor
|
|
libOpenGL
|
is the “new” OpenGL library and exposes
OpenGL entrypoints; wrapper library calling libGLdispatch
|