build: Large update to configure.ac including new --enable-minimal option

Updates include:

1. Now you can use --enable-minimal, and only tracker-store is built and
   command line utilities, everything else is disabled.
2. All ./configure arguments have been updated to use $enableval and $withval.
   This fixes cases where the --disable-* variant is used. This has also fixed
   some cases where the AC_ARG_ENABLE or AC_ARG_WITH 'if-not-given' was used
   incorrectly.
3. There is now a --enable-tracker-extract (default is enabled), now it can be
   disabled.
4. There is now a --enable-tracker-writeback (default is enabled), now it can
   be disabled.
5. Summary now reflects what is built more concisely and is much smaller when
   using --enable-minimal.
6. After running autoscan, ./configure now has more checks for PROGS, HEADERS
   and FUNCS that are being used.
7. AC_USE_SYSTEM_EXTENSIONS is now used adding C extensions where available
   (like _GNU_SOURCE).

1 files changed, 13 insertions, 7 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 2c948be53..048b64798 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -4,17 +4,23 @@ SUBDIRS =                                              \
 	common                                         \
 	gvdb					       \
 	libtracker-common                              \
-	libtracker-extract                             \
 	libtracker-miner                               \
 	libtracker-data                                \
 	libtracker-sparql                              \
-	tracker-steroids                               \
-	tracker-writeback
-
-if DIST_FUNCTIONAL_TESTS
-SUBDIRS += functional-tests
-endif
+	tracker-steroids
 
 if HAVE_TRACKER_FTS
 SUBDIRS += libtracker-fts
 endif
+
+if HAVE_TRACKER_EXTRACT
+SUBDIRS += libtracker-extract
+endif
+
+if HAVE_TRACKER_WRITEBACK
+SUBDIRS += tracker-writeback
+endif
+
+if DIST_FUNCTIONAL_TESTS
+SUBDIRS += functional-tests
+endif