CMake: Move software-gl to generic install procedure

Removes custom logic from buildbot's packing step.

This also removes icons/ folder, but CMake was already copying the
icons to the root of the install folder.

build_files/buildbot/slave_pack.py

@@ -147,20 +147,6 @@ def pack_linux(builder):
     py_target = os.path.join(builder.install_dir, info.version)
     buildbot_utils.call(builder.command_prefix + ['find', py_target, '-iname', '*.so', '-exec', 'strip', '-s', '{}', ';'])
 
-    # Copy all specific files which are too specific to be copied by
-    # the CMake rules themselves
-    print("Copying extra scripts and libs...")
-
-    extra = '/' + os.path.join('home', 'sources', 'release-builder', 'extra')
-    mesalibs = os.path.join(extra, 'mesalibs' + str(builder.bits) + '.tar.bz2')
-    software_gl = os.path.join(builder.blender_dir, 'release', 'bin', 'blender-softwaregl')
-    icons = os.path.join(builder.blender_dir, 'release', 'freedesktop', 'icons')
-
-    os.system('tar -xpf %s -C %s' % (mesalibs, builder.install_dir))
-    os.system('cp %s %s' % (software_gl, builder.install_dir))
-    os.system('cp -r %s %s' % (icons, builder.install_dir))
-    os.system('chmod 755 %s' % (os.path.join(builder.install_dir, 'blender-softwaregl')))
-
     # Construct package name
     platform_name = 'linux-' + blender_glibc + '-' + blender_arch
     package_name = get_package_name(builder, platform_name)

source/creator/CMakeLists.txt

@@ -513,6 +513,16 @@ if(UNIX AND NOT APPLE)
       DESTINATION "."
     )
 
+    if(EXISTS ${LIBDIR}/mesa)
+      install(DIRECTORY ${LIBDIR}/mesa/lib DESTINATION ".")
+
+      install(
+        PROGRAMS
+        ${CMAKE_SOURCE_DIR}/release/bin/blender-softwaregl
+        DESTINATION "."
+      )
+    endif()
+
     set(BLENDER_TEXT_FILES_DESTINATION ".")
   else()
     # main blender binary