[gvfs] Add support for libsystemd

[Ross Lagerwall <rossl src gnome org>]

commit 39be8b277c666db21965d54d5b72418ce57a450b
Author: Michael Biebl <biebl debian org>
Date:   Tue May 19 23:38:11 2015 +0200

    Add support for libsystemd
    
    In systemd v209 the various libsystemd-* libraries were merged into a
    single libsystemd library. So first check for this library and fall back
    to libsystemd-login if not found.
    
    Bug: https://bugzilla.gnome.org/show_bug.cgi?id=749603
    Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=779766

 configure.ac |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index ee3475d..bd5c043 100644
--- a/configure.ac
+++ b/configure.ac
@@ -264,18 +264,20 @@ dnl **********************************
 dnl *** Check for libsystemd-login ***
 dnl **********************************
 
-AC_ARG_ENABLE(libsystemd_login, AS_HELP_STRING([--disable-libsystemd-login],[build without 
liblibsystemd-login]))
+AC_ARG_ENABLE(libsystemd_login, AS_HELP_STRING([--disable-libsystemd-login],[build without 
libsystemd-login]))
 msg_libsystemd_login=no
 LIBSYSTEMD_LOGIN_LIBS=
 LIBSYSTEMD_LOGIN_CFLAGS=
 LIBSYSTEMD_LOGIN_REQUIRED=44
 
 if test "x$enable_libsystemd_login" != "xno"; then
-  PKG_CHECK_EXISTS([libsystemd-login >= $LIBSYSTEMD_LOGIN_REQUIRED], msg_libsystemd_login=yes)
+  PKG_CHECK_EXISTS([libsystemd], [msg_libsystemd_login=yes],
+                   [PKG_CHECK_EXISTS([libsystemd-login >= $LIBSYSTEMD_LOGIN_REQUIRED], 
msg_libsystemd_login=yes)])
 
   if test "x$msg_libsystemd_login" = "xyes"; then
-    PKG_CHECK_MODULES([LIBSYSTEMD_LOGIN],[libsystemd-login >= $LIBSYSTEMD_LOGIN_REQUIRED])
-    AC_DEFINE(HAVE_LIBSYSTEMD_LOGIN, 1, [Define to 1 if liblibsystemd_login is available])
+    PKG_CHECK_MODULES([LIBSYSTEMD_LOGIN],[libsystemd],,
+                      [PKG_CHECK_MODULES([LIBSYSTEMD_LOGIN],[libsystemd-login >= 
$LIBSYSTEMD_LOGIN_REQUIRED])])
+    AC_DEFINE(HAVE_LIBSYSTEMD_LOGIN, 1, [Define to 1 if libsystemd_login is available])
   fi
 fi