Also warn if we inadvertently use a function introduced since then.
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=59971
Reviewed-by: Colin Walters <walters@verbum.org>
# default (unless you don't have GLib), because they don't bloat the library
# or binaries.
+AC_DEFINE([GLIB_VERSION_MIN_REQUIRED], [GLIB_VERSION_2_26], [Ignore post-2.26 deprecations])
+AC_DEFINE([GLIB_VERSION_MAX_ALLOWED], [GLIB_VERSION_2_26], [Prevent post-2.26 APIs])
+
with_glib=yes
if test "x$enable_modular_tests" != xno; then