Index: source/blender/gpu/CMakeLists.txt
--- source/blender/gpu/CMakeLists.txt.orig
+++ source/blender/gpu/CMakeLists.txt
@@ -763,8 +763,9 @@ target_link_libraries(bf_gpu PUBLIC
   bf_imbuf_opencolorio_shaders
 )
 
+#if(WITH_OPENGL_BACKEND AND UNIX AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD")
 if(WITH_OPENGL_BACKEND AND UNIX)
-  target_link_libraries(bf_gpu PUBLIC rt)
+  target_link_libraries(bf_gpu PUBLIC execinfo)
 endif()
 
 if(WITH_OPENSUBDIV)
