Linux: add launcher script to fix issue launching on Steam

The steam environment sets LD_LIBRARY_PATH with a libtbb.so.2 that is
incompatible with our own. This wrapper scripts gives our own library
priority.

There is a more modern "Steam Linux Runtime" that can be used instead of
the "LD_LIBRARY_PATH Steam Runtime" and which launches Blender, but it
fails to detect GPU compute libraries. So that was not an option.

Ref #107385

Pull Request: https://projects.blender.org/blender/blender/pulls/109169

release/bin/blender-launcher

+#!/bin/sh
+BF_DIST_BIN=$(dirname "$0")
+BF_PROGRAM="blender"
+
+# Add own lib folder first, because Steam or other environments may set an
+# LD_LIBRARY_PATH that has priority over the runpath in the Blender excutable,
+# but contains incompatible libraries.
+LD_LIBRARY_PATH=${BF_DIST_BIN}/lib:${LD_LIBRARY_PATH}
+
+export LD_LIBRARY_PATH
+
+exec "$BF_DIST_BIN/$BF_PROGRAM" ${1+"$@"}

source/creator/CMakeLists.txt

@@ -619,6 +619,7 @@ if(UNIX AND NOT APPLE)
 
       install(
         PROGRAMS
+        ${CMAKE_SOURCE_DIR}/release/bin/blender-launcher
         ${CMAKE_SOURCE_DIR}/release/bin/blender-softwaregl
         DESTINATION "."
       )

tools/check_blender_release/check_static_binaries.py

@@ -51,7 +51,7 @@ ALLOWED_LIBS = (
     "libfreetype.so",
 )
 
-IGNORE_FILES = ("blender-softwaregl", )
+IGNORE_FILES = ("blender-launcher", "blender-softwaregl", )
 IGNORE_EXTENSION = (".sh", ".py", )