cmake: Make DBUS_SESSION_SOCKET_DIR in CMakeCache.txt consistent with config.h

It's unexpected to have DBUS_SESSION_SOCKET_DIR take different values in
CMakeCache.txt, which lists the variables that are available to be set
by the caller, and in config.h, which makes their final values available
to the C code. If DBUS_SESSION_SOCKET_DIR is empty and we are running
on Unix, set it to its dynamically-chosen fallback before storing it in
the cache.

[smcv: Add commit message]
Co-authored-by: Simon McVittie <smcv@collabora.com>

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 82c1493a237f3c23042e7fc0f8e82dec03cdd7a4..acda97525c01b3af7b6d05e2482c5b21a9ed25d6 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -562,10 +562,10 @@ if(MSVC_IDE)
     file(REMOVE ${PROJECT_BINARY_DIR}/data/dbus-1/services)
 endif()
 
-set(DBUS_SESSION_SOCKET_DIR "" CACHE STRING "Default directory for session socket on Unix")
 if(UNIX AND NOT DBUS_SESSION_SOCKET_DIR)
     set(DBUS_SESSION_SOCKET_DIR /tmp)
 endif()
+set(DBUS_SESSION_SOCKET_DIR "${DBUS_SESSION_SOCKET_DIR}" CACHE STRING "Default directory for session socket on Unix")
 
  # Not used on Windows, where there is no system bus
 set(DBUS_SYSTEM_PID_FILE ${DBUS_RUNSTATEDIR}/dbus/pid)