From 9795f9d711c722003d2b38bfd9e0a800a609578f Mon Sep 17 00:00:00 2001
From: Bartosz Burda <bartoszburda93@gmail.com>
Date: Sun, 5 Apr 2026 21:43:02 +0200
Subject: [PATCH] fix(linux_introspection): declare pkg-config as
 buildtool_depend

CMakeLists.txt uses find_package(PkgConfig REQUIRED) to locate
libsystemd via pkg_check_modules, but package.xml did not declare
pkg-config as a buildtool dependency. On clean buildfarm agents
rosdep only installs declared dependencies, so the pkg-config
binary was missing and CMake configure failed. Local dev
environments typically have pkg-config installed system-wide,
which masked the issue.

Closes #352
---
 .../ros2_medkit_linux_introspection/package.xml                  | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ros2_medkit_discovery_plugins/ros2_medkit_linux_introspection/package.xml b/src/ros2_medkit_discovery_plugins/ros2_medkit_linux_introspection/package.xml
index 51187f97..215bf8bf 100644
--- a/src/ros2_medkit_discovery_plugins/ros2_medkit_linux_introspection/package.xml
+++ b/src/ros2_medkit_discovery_plugins/ros2_medkit_linux_introspection/package.xml
@@ -9,6 +9,7 @@
 
   <buildtool_depend>ament_cmake</buildtool_depend>
   <buildtool_depend>ros2_medkit_cmake</buildtool_depend>
+  <buildtool_depend>pkg-config</buildtool_depend>
 
   <depend>ros2_medkit_gateway</depend>
   <depend>nlohmann-json-dev</depend>