Subject:  Link to boost_python for bf_usd
Patch author:  Orson Teodoro <orsonteodoro@hotmail.com>
Date:  Fri Jan 28 01:50:12 PM PST 2022 (Unix time: 1643406612)

Fixes ld: ../../lib/libbf_usd.a(usd_capi_export.cc.o): undefined reference to symbol '_ZN5boost6python23throw_error_already_setEv'
--- a/build_files/cmake/platform/platform_unix.cmake.orig	2021-10-27 11:46:25.000000000 -0700
+++ b/build_files/cmake/platform/platform_unix.cmake	2022-01-28 13:55:58.002588249 -0800
@@ -354,6 +354,10 @@ if(WITH_BOOST)
     find_package(IcuLinux)
     list(APPEND BOOST_LIBRARIES ${ICU_LIBRARIES})
   endif()
+  if(WITH_USD)
+    string(REPLACE "." "" PYTHON_VERSION_NO_DOT ${PYTHON_VERSION})
+    list(APPEND BOOST_LIBRARIES boost_python${PYTHON_VERSION_NO_DOT})
+  endif()
 endif()
 
 if(WITH_PUGIXML)