diff --git a/doc/arch/sandbox.rst b/doc/arch/sandbox.rst
index 246ab5b380a2ac040c961bac2d0a74ee53accf56..bfc9cc6a139a85a8cbce7a4f027fd568988e6d74 100644
--- a/doc/arch/sandbox.rst
+++ b/doc/arch/sandbox.rst
@@ -477,6 +477,9 @@ board_init_f() and board_init_r().
 
 This approach can be used on normal boards as well as sandbox.
 
+For debugging with GDB or LLDB, it is preferable to reduce the compiler
+optimization level (CONFIG_CC_OPTIMIZE_FOR_DEBUG=y) and to disable Link Time
+Optimization (CONFIG_LTO=n).
 
 SDL_CONFIG
 ----------