From 525fce717030e0be98adcd983c1df663717a74a5 Mon Sep 17 00:00:00 2001
From: Phil Howard <phil@gadgetoid.com>
Date: Fri, 28 Jun 2024 16:01:12 +0100
Subject: [PATCH] py/usermod.cmake: Check target exists in
 usermod_gather_sources.

Check a target exists before accessing properties.  Otherwise
usermod_gather_sources would recurse into garbage property names and break.

Signed-off-by: Phil Howard <phil@gadgetoid.com>
---
 py/usermod.cmake | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/py/usermod.cmake b/py/usermod.cmake
index 8532762837..c814369a48 100644
--- a/py/usermod.cmake
+++ b/py/usermod.cmake
@@ -5,6 +5,10 @@ function(usermod_gather_sources SOURCES_VARNAME INCLUDE_DIRECTORIES_VARNAME INCL
     if (NOT ${LIB} IN_LIST ${INCLUDED_VARNAME})
         list(APPEND ${INCLUDED_VARNAME} ${LIB})
 
+        if (NOT TARGET ${LIB})
+            return()
+        endif()
+
         # Gather library sources
         get_target_property(lib_sources ${LIB} INTERFACE_SOURCES)
         if (lib_sources)