[folks] build: Allow building with Tracker 0.16, 0.18 and 1.0

[Philip Withnall <pwithnall src gnome org>]

commit 951b2aa156ffad26f0a076ee0492495ddd36aa53
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Fri Sep 12 17:12:42 2014 +0100

    build: Allow building with Tracker 0.16, 0.18 and 1.0
    
    Allow configuring against one of several versions of Tracker. This uses
    the chained PKG_CHECK_MODULES technique from
    https://www.flameeyes.eu/autotools-mythbuster/pkgconfig/pkg_check_modules.html#idm103041829189696
    
    Based on a patch by Maciej Piechotka <uzytkownik2 gmail com>.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=728520

 configure.ac |   17 ++++++++++++-----
 1 files changed, 12 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a76c2c7..cfe67b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -261,7 +261,6 @@ AM_CONDITIONAL([ENABLE_LIBSOCIALWEB],
 GLIB_REQUIRED=2.38.2
 VALA_REQUIRED=0.22.0.28-9090
 VALADOC_REQUIRED=0.3.1
-TRACKER_SPARQL_MAJOR=0.16
 TRACKER_SPARQL_REQUIRED=0.15.2
 EBOOK_REQUIRED=3.8
 EBOOK_REQUIRED_FOR_BLUEZ=3.9.1
@@ -269,8 +268,6 @@ EDATASERVER_REQUIRED=3.5.3.1
 ZEITGEIST_REQUIRED=0.9.14
 GEE_REQUIRED=0.8.4
 
-AC_SUBST([TRACKER_SPARQL_MAJOR])
-
 PKG_CHECK_MODULES([GLIB],
                   [glib-2.0 >= $GLIB_REQUIRED
                    gobject-2.0 >= $GLIB_REQUIRED])
@@ -321,9 +318,19 @@ TP_GLIB_CFLAGS="$TP_GLIB_CFLAGS -DTP_VERSION_MAX_ALLOWED=TP_VERSION_0_20"
 
 AS_IF([test x$enable_tracker_backend = xyes], [
         PKG_CHECK_MODULES([TRACKER_SPARQL],
-                          [tracker-sparql-$TRACKER_SPARQL_MAJOR >= \
-                           $TRACKER_SPARQL_REQUIRED])
+                          [tracker-sparql-0.16 >= $TRACKER_SPARQL_REQUIRED],
+                          [TRACKER_SPARQL_MAJOR=0.16], [
+          PKG_CHECK_MODULES([TRACKER_SPARQL],
+                            [tracker-sparql-0.18 >= $TRACKER_SPARQL_REQUIRED],
+                            [TRACKER_SPARQL_MAJOR=0.18], [
+            PKG_CHECK_MODULES([TRACKER_SPARQL],
+                              [tracker-sparql-1.0 >= $TRACKER_SPARQL_REQUIRED],
+                              [TRACKER_SPARQL_MAJOR=1.0])
+          ])
+        ])
 ])
+
+AC_SUBST([TRACKER_SPARQL_MAJOR])
 AC_DEFINE_UNQUOTED(TRACKER_SPARQL_MAJOR, ["$TRACKER_SPARQL_MAJOR"], [Tracker major version])
 
 AS_IF([test x$enable_bluez_backend = xyes], [EBOOK_REQUIRED=$EBOOK_REQUIRED_FOR_BLUEZ])