From ed5dee857efb0ebad6ac108c0cb48f6cf97860f7 Mon Sep 17 00:00:00 2001
From: Campbell Barton <campbell@blender.org>
Date: Wed, 10 May 2023 16:19:53 +1000
Subject: [PATCH] Fix blender failing to link WITH_USD when building for the
 first time

Blender would fail to link to USD before MaterialX files were
copied to the install targets lib/ directory.
Resolve by including ${LIBDIR}/materialx/lib in link_directories.
---
 source/creator/CMakeLists.txt | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/source/creator/CMakeLists.txt b/source/creator/CMakeLists.txt
index 05df743c453..9c3df3438b4 100644
--- a/source/creator/CMakeLists.txt
+++ b/source/creator/CMakeLists.txt
@@ -75,6 +75,18 @@ if(WITH_TBB)
   endif()
 endif()
 
+if(WITH_USD)
+  # USD links libMaterialX, when using pre-compiled libraries
+  # ensures `usd_ms` can find `MaterialXRender` and friends.
+  #
+  # NOTE: This is _only_ needed when linking blender before the install target runs.
+  # Once MATERIALX libraries have been copied into `TARGETDIR_LIB` then Blender will link.
+  # Don't rely on this though as failing on a fresh build is no good and the library
+  # files could get outdated too.
+  if(DEFINED LIBDIR)
+    link_directories(${LIBDIR}/materialx/lib)
+  endif()
+endif()
 
 if(WITH_PYTHON)
   list(APPEND INC ../blender/python)