[PATCH weston] configure.ac: consider --disable-compat-libs in systemd

[Valentin Popa]

Since version 209 of systemd, libsystemd-login has been merged
into libsystemd.so.

http://lists.freedesktop.org/archives/systemd-devel/2014-February/017146.html

This patch handles the case when systemd is built
without --enable-compat-libs (e.g. no libsystemd-login).

Signed-off-by: Valentin Popa <valentin.popa at intel.com>
---
 configure.ac | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 648bee8..b9ccb95 100644
--- a/configure.ac
+++ b/configure.ac
@@ -347,13 +347,15 @@ AS_IF([test "x$enable_resize_optimization" = "xyes"],
       [AC_DEFINE([USE_RESIZE_POOL], [1], [Use resize memory pool as a performance optimization])])
 
 PKG_CHECK_MODULES(SYSTEMD_LOGIN, [libsystemd-login >= 198],
-                  [have_systemd_login=yes], [have_systemd_login=no])
+                  [have_systemd_login_198=yes have_systemd_login_209=no], [
+  PKG_CHECK_MODULES(SYSTEMD_LOGIN, [libsystemd >= 209],
+                  [have_systemd_login_209=yes have_systemd_login_198=no], [have_systemd_login_209=no have_systemd_login_198=no])
+])
+AS_IF([test "x$have_systemd_login_198" = "xyes" -o "x$have_systemd_login_209" = "xyes"],
+      [have_systemd_login=yes], [have_systemd_login=no])
 AS_IF([test "x$have_systemd_login" = "xyes"],
       [AC_DEFINE([HAVE_SYSTEMD_LOGIN], [1], [Have systemd-login])])
 AM_CONDITIONAL(HAVE_SYSTEMD_LOGIN, test "x$have_systemd_login" = "xyes")
-
-PKG_CHECK_MODULES(SYSTEMD_LOGIN_209, [libsystemd-login >= 209],
-                  [have_systemd_login_209=yes], [have_systemd_login_209=no])
 AS_IF([test "x$have_systemd_login_209" = "xyes"],
       [AC_DEFINE([HAVE_SYSTEMD_LOGIN_209], [1], [Have systemd-login >= 209])])
 
-- 
1.9.1