From e72cfb6afbaa2599c2204df3f2c0df423a2188e8 Mon Sep 17 00:00:00 2001
From: Lars Moons <lars.moons@student.uantwerpen.be>
Date: Tue, 16 Aug 2022 19:47:53 +0000
Subject: [PATCH] add support for out-of-source tree builds with
 add_subdirectory(ns-3-dev)

---
 CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ed35aac93..425ae7e8e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,10 +103,10 @@ set(NS3_DISABLED_MODULES ""
 include(build-support/macros-and-definitions.cmake)
 
 # Scan module libraries
-subdirlist(libs_to_build ${CMAKE_SOURCE_DIR}/src)
+subdirlist(libs_to_build ${CMAKE_CURRENT_SOURCE_DIR}/src)
 
 # Scan contribution libraries
-subdirlist(contrib_libs_to_build ${CMAKE_SOURCE_DIR}/contrib)
+subdirlist(contrib_libs_to_build ${CMAKE_CURRENT_SOURCE_DIR}/contrib)
 
 # Before filtering, we need to load settings from .ns3rc
 parse_ns3rc(ns3rc_enabled_modules ns3rc_examples_enabled ns3rc_tests_enabled)