Fix bug dividing small things by large ones.

[u/mdw/catacomb] / configure.in

dnl -*-fundamental-*-
dnl
dnl $Id: configure.in,v 1.24 2003/05/16 00:30:28 mdw Exp $
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 ----- Revision history --------------------------------------------------
dnl
dnl $Log: configure.in,v $
dnl Revision 1.24  2003/05/16 00:30:28  mdw
dnl Version bump.
dnl
dnl Revision 1.23  2001/03/04 13:09:40  mdw
dnl Mark dependency on mLib 2.0.0pre4 now.
dnl
dnl Revision 1.21  2000/10/08 12:01:28  mdw
dnl Reinstate the `-pedantic' option.
dnl
dnl Revision 1.20  2000/08/15 21:45:25  mdw
dnl New library configuration stuff from `common'.
dnl
dnl Revision 1.13  2000/06/17 13:51:03  mdw
dnl Whoops.  Too eager with the mLib version.
dnl
dnl Revision 1.12  2000/06/17 12:57:47  mdw
dnl New free counter noise generator, for use if /dev/random is
dnl unavailable.
dnl
dnl Revision 1.11  2000/06/17 10:51:23  mdw
dnl Version number changes.  Find maths library for Maurer's test.
dnl
dnl Revision 1.10  1999/12/22 16:03:31  mdw
dnl New mLib version.  Find socket functions for pixie.
dnl
dnl Revision 1.7  1999/11/13 01:55:48  mdw
dnl Don't be pedantic, because using `long long' as a multiprecision type
dnl gets complained about.
dnl
dnl Revision 1.6  1999/11/11 18:56:14  mdw
dnl Use `libtool' to generate a shared library.
dnl
dnl Revision 1.5  1999/11/11 17:47:34  mdw
dnl Updates for new configuration system, and `mptypes' generator.
dnl
dnl Revision 1.4  1999/11/11 00:58:19  mdw
dnl Use canned check for `ssize_t'.
dnl
dnl Revision 1.3  1999/10/24 10:20:36  mdw
dnl Modify for standalone distribution.  The library's getting far too large
dnl to be sensibly embedded in other programs.
dnl
dnl Revision 1.1  1999/09/03 08:41:11  mdw
dnl Initial import.
dnl

dnl --- Boring boilerplate ---

AC_INIT(blkc.h)
mdw_INIT_LIB(catacomb, Catacomb, 2.0.0)
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])
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 -------------------------------------------------