From d8cb7b3e0cc7097c0d6968e70c47f6449f728725 Mon Sep 17 00:00:00 2001
From: Mike Gilbert <floppym@gentoo.org>
Date: Sun, 18 Dec 2016 21:53:19 -0500
Subject: [PATCH] cmake: add FindSYSTEMD module

Fixes: https://github.com/transmission/transmission/issues/117
---
 CMakeLists.txt          |  4 +---
 cmake/FindSYSTEMD.cmake | 20 ++++++++++++++++++++
 daemon/CMakeLists.txt   | 11 +++++------
 3 files changed, 26 insertions(+), 9 deletions(-)
 create mode 100644 cmake/FindSYSTEMD.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bdeea1d7a..50dabe752 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -373,9 +373,7 @@ endif()
 
 if(WITH_SYSTEMD)
     tr_get_required_flag(WITH_SYSTEMD SYSTEMD_IS_REQUIRED)
-
-    pkg_check_modules(SYSTEMD ${SYSTEMD_IS_REQUIRED} libsystemd)
-
+    find_package(SYSTEMD)
     tr_fixup_auto_option(WITH_SYSTEMD SYSTEMD_FOUND SYSTEMD_IS_REQUIRED)
 endif()
 
diff --git a/cmake/FindSYSTEMD.cmake b/cmake/FindSYSTEMD.cmake
new file mode 100644
index 000000000..c5dfb3dc8
--- /dev/null
+++ b/cmake/FindSYSTEMD.cmake
@@ -0,0 +1,20 @@
+if(UNIX)
+    find_package(PkgConfig QUIET)
+    pkg_check_modules(PC_SYSTEMD QUIET libsystemd)
+endif()
+
+find_path(SYSTEMD_INCLUDE_DIR NAMES systemd/sd-daemon.h HINTS ${PC_SYSTEMD_INCLUDE_DIRS})
+find_library(SYSTEMD_LIBRARY NAMES systemd HINTS ${PC_SYSTEMD_LIBRARY_DIRS})
+
+include(FindPackageHandleStandardArgs)
+
+find_package_handle_standard_args(SYSTEMD
+    REQUIRED_VARS
+        SYSTEMD_LIBRARY
+        SYSTEMD_INCLUDE_DIR
+)
+
+mark_as_advanced(SYSTEMD_INCLUDE_DIR SYSTEMD_LIBRARY)
+
+set(SYSTEMD_INCLUDE_DIRS ${SYSTEMD_INCLUDE_DIR})
+set(SYSTEMD_LIBRARIES ${SYSTEMD_LIBRARY})
diff --git a/daemon/CMakeLists.txt b/daemon/CMakeLists.txt
index 8ec3b9558..2ecf83dc3 100644
--- a/daemon/CMakeLists.txt
+++ b/daemon/CMakeLists.txt
@@ -36,17 +36,16 @@ add_executable(${TR_NAME}-daemon
     ${${PROJECT_NAME}_HEADERS}
     ${${PROJECT_NAME}_WIN32_RC_FILE})
 
-set_target_properties(${TR_NAME}-daemon PROPERTIES
-    COMPILE_FLAGS "${SYSTEMD_CFLAGS}"
-    LINK_FLAGS "${SYSTEMD_LDFLAGS}"
-)
-
 target_link_libraries(${TR_NAME}-daemon
     ${TR_NAME}
     ${EVENT2_LIBRARIES}
-    ${SYSTEMD_LIBRARIES}
 )
 
+if(WITH_SYSTEMD)
+    target_include_directories(${TR_NAME}-daemon PRIVATE ${SYSTEMD_INCLUDE_DIRS})
+    target_link_libraries(${TR_NAME}-daemon ${SYSTEMD_LIBRARIES})
+endif()
+
 tr_win32_app_info(${PROJECT_NAME}_remote_WIN32_RC_FILE
     "Transmission Utility ('remote')"
     "${TR_NAME}-remote"