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# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
import sys
from spack import *
class Opengl(Package):
"""Placeholder for external OpenGL libraries from hardware vendors"""
homepage = "https://www.opengl.org/"
variant('glvnd',
default=False,
description="Expose Graphics APIs through libglvnd")
variant('glx', default=True, description="Enable GLX API.")
variant('egl', default=False, description="Enable EGL API.")
provides('gl', when='~glvnd')
provides('gl@:4.5', when='@4.5:')
provides('gl@:4.4', when='@4.4:')
provides('gl@:4.3', when='@4.3:')
provides('gl@:4.2', when='@4.2:')
provides('gl@:4.1', when='@4.1:')
provides('gl@:3.3', when='@3.3:')
provides('gl@:3.2', when='@3.2:')
provides('gl@:3.1', when='@3.1:')
provides('gl@:3.0', when='@3.0:')
provides('gl@:2.1', when='@2.1:')
provides('gl@:2.0', when='@2.0:')
provides('gl@:1.5', when='@1.5:')
provides('gl@:1.4', when='@1.4:')
provides('gl@:1.3', when='@1.3:')
provides('gl@:1.2', when='@1.2:')
provides('gl@:1.1', when='@1.1:')
provides('gl@:1.0', when='@1.0:')
if sys.platform != 'darwin':
provides('glx@1.4', when='~glvnd +glx')
# NOTE: This package should have a dependency on libglvnd, but because it
# is exclusively provided externally the dependency is never traversed.
# depends_on('libglvnd', when='+glvnd') # don't uncomment this
provides('libglvnd-be-gl', when='+glvnd')
provides('libglvnd-be-glx', when='+glvnd +glx')
provides('libglvnd-be-egl', when='+glvnd +egl')
provides('egl@1.5', when='~glvnd +egl')
depends_on('libglvnd', when='+glvnd')
# Override the fetcher method to throw a useful error message;
# fixes GitHub issue (#7061) in which this package threw a
# generic, uninformative error during the `fetch` step,
@property
def fetcher(self):
msg = """This package is intended to be a placeholder for
system-provided OpenGL libraries from hardware vendors. Please
download and install OpenGL drivers/libraries for your graphics
hardware separately, and then set that up as an external package.
An example of a working packages.yaml:
packages:
opengl:
paths:
opengl@4.5.0: /opt/opengl
buildable: False
In that case, /opt/opengl/ should contain these two folders:
include/GL/ (opengl headers, including "gl.h")
lib (opengl libraries, including "libGL.so")
On Apple Darwin (e.g., OS X, macOS) systems, this package is
normally installed as part of the XCode Command Line Tools in
/usr/X11R6, so a working packages.yaml would be
packages:
opengl:
paths:
opengl@4.1: /usr/X11R6
buildable: False
In that case, /usr/X11R6 should contain
include/GL/ (OpenGL headers, including "gl.h")
lib (OpenGL libraries, including "libGL.dylib")
On OS X/macOS, note that the version of OpenGL provided
depends on your hardware. Look at
https://support.apple.com/en-us/HT202823 to see what version
of OpenGL your Mac uses."""
raise InstallError(msg)
@property
def libs(self):
result = LibraryList(())
# "libs" provided by glvnd; this package sets the environment variables
# so that glvnd, in turn, loads this package's libraries at run-time.
if '+glvnd' in self.spec:
return result
for dir in ['lib64', 'lib']:
libs = find_libraries('libGL', join_path(self.prefix, dir),
shared=True, recursive=False)
if libs:
result.extend(libs)
break
if '+egl' in self.spec:
for dir in ['lib64', 'lib']:
libs = find_libraries('libEGL', join_path(self.prefix, dir),
shared=True, recursive=False)
if libs:
result.extend(libs)
break
return result
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