path: root/src/test/update-warnings.h

/* See LICENSE file for copyright and license details. */
#ifndef LIBGAMMA_TEST_UPDATE_WARNINGS_H
#define LIBGAMMA_TEST_UPDATE_WARNINGS_H

#include <libgamma.h>


/*
 * This file testes whether the program is out of date
 * when it is compiled. This is done by checking for newer
 * values of constants that tells us how much there is of
 * different things for which we may want to create
 * descriptions or otherwise handle especially.
 * 
 * To get the current value of for example `LIBGAMMA_ERROR_MIN`
 * simply run the command
 * 
 *     cpp <<EOF | tail -n 1
 *     #include <libgamma.h>
 *     LIBGAMMA_ERROR_MIN
 *     EOF
 *
 * However, we only do this for if GCC is used to
 * compile the program because the #warning CPP
 * directive is a GCC extension. If you are not
 * using GNU you may want to find another way to
 * accomplish this.
 */

#ifdef __GCC__
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wcpp"
# if LIBGAMMA_ERROR_MIN < -46
#  warning New error codes have been added to libgamma
# endif
# if LIBGAMMA_METHOD_COUNT > 6
#  warning New adjust methods has been added to libgamma
# endif
# if LIBGAMMA_CONNECTOR_TYPE_COUNT > 20
#  warning New connector types have been added to libgamma
# endif
# if LIBGAMMA_SUBPIXEL_ORDER_COUNT > 6
#  warning New subpixel orders have been added to libgamma
# endif
# if LIBGAMMA_CRTC_INFO_COUNT > 13
#  warning New CRTC information fields have been added to libgamma
# endif
# pragma GCC diagnostic pop
#endif


#endif