dnl -*-m4-*-
dnl
dnl $Id$
dnl
dnl Autoconfiguration for Catacomb
dnl
dnl (c) 1999 Straylight/Edgeware
dnl

dnl ----- Licensing notice --------------------------------------------------
dnl
dnl This file is part of Catacomb.
dnl
dnl Catacomb is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Library General Public License as
dnl published by the Free Software Foundation; either version 2 of the
dnl License, or (at your option) any later version.
dnl 
dnl Catacomb is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU Library General Public License for more details.
dnl 
dnl You should have received a copy of the GNU Library General Public
dnl License along with Catacomb; if not, write to the Free
dnl Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
dnl MA 02111-1307, USA.

dnl --- Boring boilerplate ---

AC_INIT(blkc.h)
mdw_INIT_LIB(catacomb, Catacomb, 2.1.0)
AM_CONFIG_HEADER(config.h)

dnl --- Make sure I can compile and build libraries ---

AC_PROG_CC
AM_PROG_LIBTOOL
mdw_GCC_FLAGS

AC_PROG_YACC

dnl --- Actually, I assume these exist anyway ---

AC_CHECK_HEADERS(unistd.h)
AC_HEADER_STDC

dnl --- Check for various important system types ---

AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_UID_T
AC_CHECK_TYPE(time_t, long)
mdw_TYPE_SSIZE_T

dnl --- The maths library, for Maurer's test ---

mdw_CHECK_MANYLIBS(log, m,,, [#include <math.h>], [2])
mdw_CHECK_MANYLIBS(sqrt, m,,, [#include <math.h>], [2])

dnl --- Functions used for noise-gathering ---

AC_CHECK_FUNCS(setgroups)

AC_CACHE_CHECK([whether the freewheel noise generator will work],
[catacomb_cv_freewheel],
[AC_TRY_LINK([
#include <setjmp.h>
#include <sys/time.h>
],
[struct itimerval itv = { { 0, 0 }, { 0, 5000 } };
jmp_buf j;
setitimer(ITIMER_REAL, &itv, 0);
sigsetjmp(j, 1);],
[catacomb_cv_freewheel=yes],
[catacomb_cv_freewheel=no])])
if test "$catacomb_cv_freewheel" = "yes"; then
  AC_DEFINE([USE_FREEWHEEL], [1],
            [Define if you want to use the freewheel noise generator.])
fi

dnl --- Support for the passphrase pixie ---

mdw_CHECK_MANYLIBS(socket, socket)
AC_CHECK_FUNCS(mlock)

dnl --- Done ---

mdw_MLIB(2.0.0)
AC_OUTPUT(Makefile tests/Makefile catacomb-config:lib-config.in qcc,
  chmod 755 qcc)

dnl ----- That's all, folks -------------------------------------------------