echo
fi
+dnl Check for Subversion library support
+# libsvn support defaults to yes
+save_LIBS=$LIBS
+save_CPPFLAGS=$CPPFLAGS
+AC_ARG_WITH(libsvn, [ --without-libsvn Do not use built-in subversion (libsvn) for simgear [default=no]], [], [with_libsvn=yes])
+if test "x$with_libsvn" = "xyes"; then
+ LIBS="`apr-1-config --link-ld`"
+ CPPFLAGS="-I/usr/include/subversion-1 `apr-1-config --includes --cppflags`"
+ AC_CHECK_HEADERS([svn_client.h])
+ if test "x$ac_cv_header_svn_client_h" = "xyes"; then
+ echo "Using built-in subversion (libsvn) for scenery downloads."
+ AC_SEARCH_LIBS(svn_client_checkout, svn_client-1,
+ [AC_DEFINE([HAVE_LIBSVN_CLIENT_1], [1], [Define to 1 if you have libsvn_client-1])],
+ [AC_MSG_ERROR(svn_client-1 library not found.)],)
+ AC_SEARCH_LIBS(svn_cmdline_init, svn_subr-1, , [AC_MSG_ERROR(svn_subr-1 library not found.)],)
+ AC_SEARCH_LIBS(svn_ra_initialize, svn_ra-1, , [AC_MSG_ERROR(svn_ra-1 library not found.)],)
+ svn_LIBS=$LIBS
+ svn_CPPFLAGS=$CPPFLAGS
+ AC_SUBST(svn_LIBS)
+ AC_SUBST(svn_CPPFLAGS)
+ else
+ echo "Libsvn not found. Will use command line subversion for scenery downloads."
+ svn_LIBS=""
+ svn_CPPFLAGS=""
+ fi
+else
+echo "Libsvn explicitly disabled. Will use command line subversion for scenery downloads."
+ svn_LIBS=""
+ svn_CPPFLAGS=""
+fi
+LIBS=$save_LIBS
+CPPFLAGS=$save_CPPFLAGS
+
dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS( \
simgear/scene/sky/Makefile \
simgear/scene/tgdb/Makefile \
simgear/scene/util/Makefile \
+ simgear/scene/tsync/Makefile \
simgear/screen/Makefile \
simgear/serial/Makefile \
simgear/sound/Makefile \