gnupg/configure.ac

dnl Configure.ac script for GnuPG
dnl Copyright (C) 1998, 1999, 2000, 2001, 2002,
dnl               2003 Free Software Foundation, Inc.
dnl
dnl This file is part of GnuPG.
dnl
dnl GnuPG is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl 
dnl GnuPG 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 General Public License for more details.
dnl 
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
dnl
dnl (Process this file with autoconf to produce a configure script.)
dnlAC_REVISION($Revision$)dnl

AC_PREREQ(2.52)

# Remember to change the version number immediately *after* a release
# and remove the "-cvs" or "rc" suffix immediately *before* a release.
AC_INIT(gnupg, 1.3.2-cvs, bug-gnupg@gnu.org)
# Set development_version to yes if the minor number is odd or you
# feel that the default check for a development version is not
# sufficient.
development_version=yes

ALL_LINGUAS="de"

AC_CONFIG_AUX_DIR(scripts)
AC_CONFIG_SRCDIR(g10/g10.c)
AC_CANONICAL_TARGET()
AM_INIT_AUTOMAKE
AM_CONFIG_HEADER(config.h)

AC_GNU_SOURCE

dnl
dnl  Check for random module options
dnl
AC_MSG_CHECKING([which random module to use])
AC_ARG_ENABLE(static-rnd,
    [  --enable-static-rnd=[egd|unix|linux|auto]  ],
[use_static_rnd=$enableval], [use_static_rnd=default] )

if test "$use_static_rnd" = no; then
    use_static_rnd=default
fi

case "$use_static_rnd" in
    egd | linux | unix | default )
      AC_MSG_RESULT($use_static_rnd)
      ;;
    auto )
      AC_MSG_RESULT(automagically selected at runtime)
      ;;
    * )
      AC_MSG_RESULT(invalid argument)
      AC_MSG_ERROR(there is no random module rnd$use_static_rnd)
      ;;
esac

AC_ARG_WITH(egd-socket,
    [  --with-egd-socket=NAME  use NAME for the EGD socket],
            egd_socket_name="$withval", egd_socket_name="" )
AC_DEFINE_UNQUOTED(EGD_SOCKET_NAME, "$egd_socket_name",
                   [Define if you don't want the default EGD socket name.
                    For details see cipher/rndegd.c])


dnl
dnl See whether the user wants to disable checking for /dev/random

AC_MSG_CHECKING([whether use of /dev/random is requested])
AC_ARG_ENABLE(dev-random,
[  --disable-dev-random    disable the use of dev random],
    try_dev_random=$enableval, try_dev_random=yes)
AC_MSG_RESULT($try_dev_random)


dnl
dnl  Check other options
dnl

AC_MSG_CHECKING([whether assembler modules are requested])
AC_ARG_ENABLE(asm,
[  --disable-asm           do not use assembler modules],
     try_asm_modules=$enableval, try_asm_modules=yes)
AC_MSG_RESULT($try_asm_modules)

AC_MSG_CHECKING([whether memory guard is requested])
AC_ARG_ENABLE(m-guard,
    [  --enable-m-guard        enable memory guard facility],
    use_m_guard=$enableval, use_m_guard=no)
AC_MSG_RESULT($use_m_guard)
if test "$use_m_guard" = yes ; then
    AC_DEFINE(M_GUARD,1,[Define to use the (obsolete) malloc guarding feature])
fi

dnl See if we are disabling any algorithms or features for a smaller
dnl binary

try_dynload=no

use_idea=yes
use_cast5=yes
use_blowfish=yes
use_aes=yes
use_twofish=yes
use_tiger192=no
use_old_tiger192=no
use_sha256=yes
use_sha512=yes
use_exec=yes

AC_ARG_ENABLE(minimal,
   AC_HELP_STRING([--enable-minimal],[build the smallest gpg binary possible]),
   use_idea=no
   use_cast5=no
   use_blowfish=no
   use_aes=no
   use_twofish=no
   use_sha256=no
   use_sha512=no
   use_exec=no)

AC_MSG_CHECKING([whether to enable the IDEA cipher])
AC_ARG_ENABLE(idea,
   AC_HELP_STRING([--disable-idea],[disable the IDEA cipher]),
   use_idea=$enableval)
AC_MSG_RESULT($use_idea)
if test x"$use_idea" = xyes ; then
   AC_DEFINE(USE_IDEA,1,[Define to include the IDEA cipher])

# We don't need idea but some people claim that they need it for
# research etc., so we allow to place an idea source code into the
# cipher directory and statically link it if available, otherwise we
# link to a stub.  We don't use AC_CHECK_FILE to avoid caching.

   AC_MSG_CHECKING([for idea cipher module])
   tmp=""
   if test -f $srcdir/cipher/idea.c; then 
      IDEA_O=idea.o
      tmp=idea
   else
      IDEA_O=idea-stub.o
      tmp=no
      try_dynload=yes
   fi
   AC_SUBST(IDEA_O)
   AC_MSG_RESULT($tmp)
fi

AC_MSG_CHECKING([whether to enable the CAST5 cipher])
AC_ARG_ENABLE(cast5,
   AC_HELP_STRING([--disable-cast5],[disable the CAST5 cipher]),
   use_cast5=$enableval)
AC_MSG_RESULT($use_cast5)
if test x"$use_cast5" = xyes ; then
   AC_DEFINE(USE_CAST5,1,[Define to include the CAST5 cipher])
fi

AC_MSG_CHECKING([whether to enable the BLOWFISH cipher])
AC_ARG_ENABLE(blowfish,
   AC_HELP_STRING([--disable-blowfish],[disable the BLOWFISH cipher]),
   use_blowfish=$enableval)
AC_MSG_RESULT($use_blowfish)
if test x"$use_blowfish" = xyes ; then
   AC_DEFINE(USE_BLOWFISH,1,[Define to include the BLOWFISH cipher])
fi

AC_MSG_CHECKING([whether to enable the AES ciphers])
AC_ARG_ENABLE(aes,
   AC_HELP_STRING([--disable-aes],[disable the AES, AES192, and AES256 ciphers]),
   use_aes=$enableval)
AC_MSG_RESULT($use_aes)
if test x"$use_aes" = xyes ; then
   AC_DEFINE(USE_AES,1,[Define to include the AES, AES192, and AES256 ciphers])
fi

AC_MSG_CHECKING([whether to enable the TWOFISH cipher])
AC_ARG_ENABLE(twofish,
   AC_HELP_STRING([--disable-twofish],[disable the TWOFISH cipher]),
   use_twofish=$enableval)
AC_MSG_RESULT($use_twofish)
if test x"$use_twofish" = xyes ; then
   AC_DEFINE(USE_TWOFISH,1,[Define to include the TWOFISH cipher])
fi

dnl this is because the stable branch calls it just "tiger".
AC_ARG_ENABLE(tiger,,use_tiger192=$enableval)
AC_ARG_ENABLE(old-tiger,,use_old_tiger192=$enableval)

dnl TIGER192 is actually defined only after we confirm 64-bit support
dnl later
AC_MSG_CHECKING([whether to enable the nonstandard TIGER/192 digest])
AC_ARG_ENABLE(tiger192,
   AC_HELP_STRING([--enable-tiger192],[enable the nonstandard TIGER/192 digest]),
   use_tiger192=$enableval)
AC_MSG_RESULT($use_tiger192)

AC_MSG_CHECKING([whether to enable old-style nonstandard TIGER/192 digest support])
AC_ARG_ENABLE(old-tiger192,
   AC_HELP_STRING([--enable-old-tiger192],[enable old-style nonstandard TIGER/192 digest support]),
   use_old_tiger=$enableval)
AC_MSG_RESULT($use_old_tiger192)

if test x"$use_tiger192" = xyes || test x"$use_old_tiger192" = xyes ; then
   AC_MSG_WARN([[
***
*** The TIGER/192 digest is in the process of being removed from the
*** OpenPGP standard.  While it hasn't been removed from GnuPG yet, it
*** will be removed in a future version.  For the sake of future
*** compatibility, please do not use this digest.
***]])
fi

AC_MSG_CHECKING([whether to enable the SHA-256 digest])
AC_ARG_ENABLE(sha256,
   AC_HELP_STRING([--disable-sha256],[disable the SHA-256 digest]),
   use_sha256=$enableval)
AC_MSG_RESULT($use_sha256)
if test x"$use_sha256" = xyes ; then
   AC_DEFINE(USE_SHA256,1,[Define to include the SHA-256 digest])
fi

dnl SHA512 is defined only after we confirm 64-bit support later
AC_MSG_CHECKING([whether to enable the SHA-384 and SHA-512 digests])
AC_ARG_ENABLE(sha512,
   AC_HELP_STRING([--disable-sha512],[disable the SHA-384 and SHA-512 digests]),
   use_sha512=$enableval)
AC_MSG_RESULT($use_sha512)

AC_MSG_CHECKING([whether to enable external program execution])
AC_ARG_ENABLE(exec,
    AC_HELP_STRING([--disable-exec],[disable all external program execution]),
    use_exec=$enableval)
AC_MSG_RESULT($use_exec)
if test "$use_exec" = no ; then
    AC_DEFINE(NO_EXEC,1,[Define to disable all external program execution])
fi

if test "$use_exec" = yes ; then
  AC_MSG_CHECKING([whether to enable photo ID viewing])
  AC_ARG_ENABLE(photo-viewers,
      [  --disable-photo-viewers disable photo ID viewers],
      [if test "$enableval" = no ; then
         AC_DEFINE(DISABLE_PHOTO_VIEWER,1,[define to disable photo viewing])
      fi],enableval=yes)
  gnupg_cv_enable_photo_viewers=$enableval
  AC_MSG_RESULT($enableval)

  if test "$gnupg_cv_enable_photo_viewers" = yes ; then
    AC_MSG_CHECKING([whether to use a fixed photo ID viewer])
    AC_ARG_WITH(photo-viewer,
        [  --with-photo-viewer=FIXED_VIEWER  set a fixed photo ID viewer],
        [if test "$withval" = yes ; then
           withval=no
        elif test "$withval" != no ; then
           AC_DEFINE_UNQUOTED(FIXED_PHOTO_VIEWER,"$withval",
  	                    [if set, restrict photo-viewer to this])
        fi],withval=no)
    AC_MSG_RESULT($withval)
  fi

  AC_MSG_CHECKING([whether to enable external keyserver helpers])
  AC_ARG_ENABLE(keyserver-helpers,
      [  --disable-keyserver-helpers  disable all external keyserver support],
      [if test "$enableval" = no ; then
         AC_DEFINE(DISABLE_KEYSERVER_HELPERS,1,
                  [define to disable keyserver helpers])
      fi],enableval=yes)
  gnupg_cv_enable_keyserver_helpers=$enableval
  AC_MSG_RESULT($enableval)

  if test "$gnupg_cv_enable_keyserver_helpers" = yes ; then
    AC_MSG_CHECKING([whether LDAP keyserver support is requested])
    AC_ARG_ENABLE(ldap,
    [  --disable-ldap          disable LDAP keyserver interface],
        try_ldap=$enableval, try_ldap=yes)
    AC_MSG_RESULT($try_ldap)

    AC_MSG_CHECKING([whether HKP keyserver support is requested])
    AC_ARG_ENABLE(hkp,
    [  --disable-hkp           disable HKP keyserver interface],
        try_hkp=$enableval, try_hkp=yes)
    AC_MSG_RESULT($try_hkp)

    if test "$try_hkp" = yes ; then
      AC_SUBST(GPGKEYS_HKP,"gpgkeys_hkp$EXEEXT")
    fi

    AC_MSG_CHECKING([whether email keyserver support is requested])
    AC_ARG_ENABLE(mailto,
    [  --disable-mailto        disable email keyserver interface],
        try_mailto=$enableval, try_mailto=yes)
    AC_MSG_RESULT($try_mailto)
    fi

    AC_MSG_CHECKING([whether keyserver exec-path is enabled])
    AC_ARG_ENABLE(keyserver-path,
        [  --disable-keyserver-path disable the exec-path option for keyserver helpers],
        [if test "$enableval" = no ; then
  	 AC_DEFINE(DISABLE_KEYSERVER_PATH,1,[define to disable exec-path for keyserver helpers])
        fi],enableval=yes)
    AC_MSG_RESULT($enableval)
  fi

AC_MSG_CHECKING([whether the included zlib is requested])
AC_ARG_WITH(included-zlib,
    [  --with-included-zlib    use the zlib code included here],
[g10_force_zlib=yes], [g10_force_zlib=no] )
AC_MSG_RESULT($g10_force_zlib)

dnl
dnl Check whether we want to use Linux capabilities
dnl
AC_MSG_CHECKING([whether use of capabilities is requested])
AC_ARG_WITH(capabilities,
    [  --with-capabilities     use linux capabilities [default=no]],
[use_capabilities="$withval"],[use_capabilities=no])
AC_MSG_RESULT($use_capabilities)


AH_BOTTOM([
#if !(defined(HAVE_FORK) && defined(HAVE_PIPE) && defined(HAVE_WAITPID))
#define EXEC_TEMPFILE_ONLY
#endif

#include "g10defs.h"
])


AM_MAINTAINER_MODE

dnl Checks for programs.

AC_PROG_MAKE_SET
AM_SANITY_CHECK
missing_dir=`cd $ac_aux_dir && pwd`
AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
AC_PROG_CC
AC_PROG_CPP
AC_PROG_RANLIB
AC_CHECK_TOOL(AR, ar, :)
AC_PATH_PROG(PERL,"perl")
AC_ISC_POSIX
AC_SYS_LARGEFILE
AC_PROG_INSTALL
AC_PROG_AWK
AC_CHECK_PROG(DOCBOOK_TO_MAN, docbook-to-man, yes, no)
AM_CONDITIONAL(HAVE_DOCBOOK_TO_MAN, test "$ac_cv_prog_DOCBOOK_TO_MAN" = yes)
GNUPG_CHECK_FAQPROG
GNUPG_CHECK_DOCBOOK_TO_TEXI

MPI_OPT_FLAGS=""


try_gettext=yes
have_dosish_system=no
case "${target}" in
    *-*-mingw32*)
        # special stuff for Windoze NT
        ac_cv_have_dev_random=no
        AC_DEFINE(USE_ONLY_8DOT3,1,
                  [set this to limit filenames to the 8.3 format])
        AC_DEFINE(HAVE_DRIVE_LETTERS,1,
                  [defined if we must run on a stupid file system])
        AC_DEFINE(USE_SIMPLE_GETTEXT,1,
                  [because the Unix gettext has too much overhead on
                   MingW32 systems and these systems lack Posix functions,
                   we use a simplified version of gettext])
        have_dosish_system=yes
        try_gettext="no"
        ;;
    i?86-emx-os2 | i?86-*-os2*emx )
        # OS/2 with the EMX environment
        ac_cv_have_dev_random=no
        AC_DEFINE(HAVE_DRIVE_LETTERS)
        have_dosish_system=yes
        try_gettext="no"
        ;;

    i?86-*-msdosdjgpp*)
        # DOS with the DJGPP environment
        ac_cv_have_dev_random=no
        AC_DEFINE(HAVE_DRIVE_LETTERS)
        have_dosish_system=yes
        try_gettext="no"
        ;;

    *-*-freebsd*)
       # FreeBSD
       CPPFLAGS="$CPPFLAGS -I/usr/local/include"
       LDFLAGS="$LDFLAGS -L/usr/local/lib"
       ;;

    *-*-hpux*)
        if test -z "$GCC" ; then
            CFLAGS="$CFLAGS -Ae -D_HPUX_SOURCE"
        fi
        ;;
    *-dec-osf4*)
        if test -z "$GCC" ; then
            # Suppress all warnings
            # to get rid of the unsigned/signed char mismatch warnings.
            CFLAGS="$CFLAGS -w"
        fi
        ;;
    *-dec-osf5*)
        if test -z "$GCC" ; then
            # Use the newer compiler `-msg_disable ptrmismatch' to
            # get rid of the unsigned/signed char mismatch warnings.
            # Using this may hide other pointer mismatch warnings, but
	    # it at least lets other warning classes through
            CFLAGS="$CFLAGS -msg_disable ptrmismatch"
        fi
        ;;
    m68k-atari-mint)
        ;;
    *)
       ;;
esac

if test "$have_dosish_system" = yes; then
   AC_DEFINE(HAVE_DOSISH_SYSTEM,1,
             [defined if we run on some of the PCDOS like systems 
              (DOS, Windoze. OS/2) with special properties like
              no file modes])
fi
AM_CONDITIONAL(HAVE_DOSISH_SYSTEM, test "$have_dosish_system" = yes)

AC_SUBST(MPI_OPT_FLAGS)
GNUPG_SYS_SYMBOL_UNDERSCORE

dnl Must check for network library requirements before doing link tests
dnl for ldap, for example. If ldap libs are static (or dynamic and without
dnl ELF runtime link paths), then link will fail and LDAP support won't
dnl be detected.

AC_CHECK_FUNC(gethostbyname, , AC_CHECK_LIB(nsl, gethostbyname,
	[NETLIBS="-lnsl $NETLIBS"]))
AC_CHECK_FUNC(setsockopt, , AC_CHECK_LIB(socket, setsockopt,
	[NETLIBS="-lsocket $NETLIBS"]))

dnl Now try for the resolver functions so we can use DNS SRV

AC_ARG_ENABLE(dns-srv,
   AC_HELP_STRING([--disable-dns-srv],[disable the use of DNS SRV in HKP]),
   use_dns_srv=$enableval,use_dns_srv=yes)

if test x"$try_hkp" = xyes && test x"$use_dns_srv" = xyes ; then
  _srv_save_libs=$LIBS
  LIBS=""
  # the double underscore thing is a glibc-ism?
  AC_SEARCH_LIBS(res_query,resolv bind,,
                 AC_SEARCH_LIBS(__res_query,resolv bind,,use_dns_srv=no))
  AC_SEARCH_LIBS(dn_expand,resolv bind,,
                 AC_SEARCH_LIBS(__dn_expand,resolv bind,,use_dns_srv=no))
  AC_SEARCH_LIBS(dn_skipname,resolv bind,,
                 AC_SEARCH_LIBS(__dn_skipname,resolv bind,,use_dns_srv=no))

  if test x"$use_dns_srv" = xyes ; then
     AC_DEFINE(USE_DNS_SRV,1,[define to use DNS SRV])
     SRVLIBS=$LIBS
  else
     AC_MSG_WARN([Resolver functions not found.  Disabling DNS SRV.])
  fi
  LIBS=$_srv_save_libs
fi

AC_SUBST(SRVLIBS)

# Try and link a LDAP test program to weed out unusable LDAP
# libraries.  -lldap [-llber [-lresolv]] is for OpenLDAP.  OpenLDAP in
# general is terrible with creating weird dependencies.  If all else
# fails, the user can play guess-the-dependency by using something
# like ./configure LDAPLIBS="-Lfoo -lbar"

if test "$try_ldap" = yes ; then
  for MY_LDAPLIBS in ${LDAPLIBS+"$LDAPLIBS"} "-lldap" "-lldap -llber" "-lldap -llber -lresolv"; do
    _ldap_save_libs=$LIBS
    LIBS="$MY_LDAPLIBS $NETLIBS $LIBS"

    AC_MSG_CHECKING([whether LDAP via \"$MY_LDAPLIBS\" is present and sane])
    AC_TRY_LINK([#include <ldap.h>],[ldap_open("foobar",1234);],
                [gnupg_cv_func_ldap_init=yes],[gnupg_cv_func_ldap_init=no])
    AC_MSG_RESULT([$gnupg_cv_func_ldap_init])

    if test $gnupg_cv_func_ldap_init = no; then
      AC_MSG_CHECKING([whether I can make LDAP be sane with lber.h])
      AC_TRY_LINK([#include <lber.h>
#include <ldap.h>],[ldap_open("foobar",1234);],
         [gnupg_cv_func_ldaplber_init=yes],[gnupg_cv_func_ldaplber_init=no])
      AC_MSG_RESULT([$gnupg_cv_func_ldaplber_init])
    fi

    if test "$gnupg_cv_func_ldaplber_init" = yes ; then
       AC_DEFINE(NEED_LBER_H,1,[Define if the LDAP library requires including lber.h before ldap.h])
    fi

    if test "$gnupg_cv_func_ldap_init" = yes || \
  	test "$gnupg_cv_func_ldaplber_init" = yes ; then
       LDAPLIBS=$MY_LDAPLIBS
       GPGKEYS_LDAP="gpgkeys_ldap$EXEEXT"

       AC_MSG_CHECKING([whether LDAP supports ldap_get_option])

       if test "$gnupg_cv_func_ldap_init" = yes ; then
	  AC_TRY_LINK([#include <ldap.h>],
	     [ldap_get_option((void *)0,0,(void *)0);],
	     [gnupg_cv_func_ldap_get_option=yes],
	     [gnupg_cv_func_ldap_get_option=no])
	else
	  AC_TRY_LINK([#include <lber.h>
#include <ldap.h>],[ldap_get_option((void *)0,0,(void *)0);],
	     [gnupg_cv_func_ldap_get_option=yes],
	     [gnupg_cv_func_ldap_get_option=no])
       fi

       AC_MSG_RESULT([$gnupg_cv_func_ldap_get_option])

       if test "$gnupg_cv_func_ldap_get_option" = yes ; then
          AC_DEFINE(HAVE_LDAP_GET_OPTION,1,[Define if the LDAP library has ldap_get_option])
       else
          AC_MSG_CHECKING([whether LDAP supports ld_errno])

	  if test "$gnupg_cv_func_ldap_init" = yes ; then
	    AC_TRY_COMPILE([#include <ldap.h>],
	       [LDAP *ldap; ldap->ld_errno;],
	       [gnupg_cv_func_ldap_ld_errno=yes],
	       [gnupg_cv_func_ldap_ld_errno=no])
	   else
	    AC_TRY_LINK([#include <lber.h>
#include <ldap.h>],[LDAP *ldap; ldap->ld_errno;],
	       [gnupg_cv_func_ldap_ld_errno=yes],
	       [gnupg_cv_func_ldap_ld_errno=no])
          fi

          AC_MSG_RESULT([$gnupg_cv_func_ldap_ld_errno])

	  if test "$gnupg_cv_func_ldap_ld_errno" = yes ; then
	     AC_DEFINE(HAVE_LDAP_LD_ERRNO,1,[Define if the LDAP library supports ld_errno])
          fi
       fi
    fi

    LIBS=$_ldap_save_libs

    if test "$GPGKEYS_LDAP" != "" ; then break; fi
  done
fi

AC_SUBST(GPGKEYS_LDAP)
AC_SUBST(LDAPLIBS)

dnl This isn't necessarily sendmail itself, but anything that gives a
dnl sendmail-ish interface to the outside world.  That includes qmail,
dnl postfix, etc.  Basically, anything that can handle "sendmail -t".

if test "$try_mailto" = yes ; then
  AC_ARG_WITH(mailprog,[  --with-mailprog=NAME    use "NAME -t" for mail transport],,with_mailprog=yes)

  if test "$with_mailprog" = yes ; then
    AC_PATH_PROG(SENDMAIL,sendmail,,$PATH:/usr/sbin:/usr/libexec:/usr/lib)
    if test "$ac_cv_path_SENDMAIL" ; then
      GPGKEYS_MAILTO="gpgkeys_mailto"
    fi
  elif test "$with_mailprog" != no ; then
    AC_MSG_CHECKING([for a mail transport program])
    AC_SUBST(SENDMAIL,$with_mailprog)
    AC_MSG_RESULT($with_mailprog)
    GPGKEYS_MAILTO="gpgkeys_mailto"
  fi
fi

AC_SUBST(GPGKEYS_MAILTO)

case "${target}" in
    *-*-mingw32*)
        PRINTABLE_OS_NAME="MingW32"
        ;;
    *-*-cygwin*)
        PRINTABLE_OS_NAME="Cygwin"
        ;;
    i?86-emx-os2 | i?86-*-os2*emx )
        PRINTABLE_OS_NAME="OS/2"
        ;;
    i?86-*-msdosdjgpp*)
        PRINTABLE_OS_NAME="MSDOS/DJGPP"
        try_dynload=no
        ;;
    *-linux*)
        PRINTABLE_OS_NAME="GNU/Linux"
        ;;
dnl let that after linux to avoid gnu-linux problems
    *-gnu*)
        PRINTABLE_OS_NAME="GNU/Hurd"
        ;;
    *)
        PRINTABLE_OS_NAME=`uname -s || echo "Unknown"`
        ;;
esac
AC_DEFINE_UNQUOTED(PRINTABLE_OS_NAME, "$PRINTABLE_OS_NAME",
                   [A human readable text with the name of the OS])


#
# 1. Set names of random devices
#
NAME_OF_DEV_RANDOM="/dev/random"
NAME_OF_DEV_URANDOM="/dev/urandom"
case "${target}" in
    *-openbsd*)
        NAME_OF_DEV_RANDOM="/dev/srandom"
        NAME_OF_DEV_URANDOM="/dev/urandom"
        ;;
esac
AC_DEFINE_UNQUOTED(NAME_OF_DEV_RANDOM, "$NAME_OF_DEV_RANDOM",
                   [defined to the name of the strong random device])
AC_DEFINE_UNQUOTED(NAME_OF_DEV_URANDOM, "$NAME_OF_DEV_URANDOM",
                   [defined to the name of the weaker random device])
AC_SUBST(MPI_OPT_FLAGS)


dnl Checks for libraries.

if test "$try_gettext" = yes; then
  AM_GNU_GETTEXT(,[need-ngettext])

  # gettext requires some extra checks.  These really should be part of
  # the basic AM_GNU_GETTEXT macro.  TODO: move other gettext-specific
  # function checks to here.

  AC_CHECK_FUNCS(strchr)
else
  USE_NLS=no
  USE_INCLUDED_LIBINTL=no
  BUILD_INCLUDED_LIBINTL=no
  AC_SUBST(USE_NLS)
  AC_SUBST(USE_INCLUDED_LIBINTL)
  AC_SUBST(BUILD_INCLUDED_LIBINTL)
fi


if test "$try_dynload" = yes ; then
  AC_CHECK_LIB(dl,dlopen)
  if test "$ac_cv_lib_dl_dlopen" = "yes"; then
    AC_DEFINE(USE_DYNAMIC_LINKING,1,
              [define to enable the use of extensions])
    AC_DEFINE(HAVE_DL_DLOPEN,1,
              [Defined when the dlopen function family is available])
  else
    AC_CHECK_FUNCS(dlopen)
    if test "$ac_cv_func_dlopen" = "yes"; then
      AC_DEFINE(USE_DYNAMIC_LINKING)
      AC_DEFINE(HAVE_DL_DLOPEN)
    fi
  fi
else
  AC_MSG_CHECKING(for dynamic loading)
  DYNLINK_LDFLAGS=
  DYNLINK_MOD_CFLAGS=
  AC_MSG_RESULT(has been disabled)
fi

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h langinfo.h termio.h locale.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE
AC_TYPE_SIZE_T
AC_TYPE_MODE_T
AC_TYPE_SIGNAL
AC_DECL_SYS_SIGLIST

GNUPG_CHECK_ENDIAN

GNUPG_CHECK_TYPEDEF(byte, HAVE_BYTE_TYPEDEF)
GNUPG_CHECK_TYPEDEF(ushort, HAVE_USHORT_TYPEDEF)
GNUPG_CHECK_TYPEDEF(ulong, HAVE_ULONG_TYPEDEF)
GNUPG_CHECK_TYPEDEF(u16, HAVE_U16_TYPEDEF)
GNUPG_CHECK_TYPEDEF(u32, HAVE_U32_TYPEDEF)

AC_CHECK_SIZEOF(unsigned short)
AC_CHECK_SIZEOF(unsigned int)
AC_CHECK_SIZEOF(unsigned long)
AC_CHECK_SIZEOF(unsigned long long)
AC_CHECK_SIZEOF(uint64_t)

if test "$ac_cv_sizeof_unsigned_short" = "0" \
   || test "$ac_cv_sizeof_unsigned_int" = "0" \
   || test "$ac_cv_sizeof_unsigned_long" = "0"; then
    AC_MSG_WARN([Hmmm, something is wrong with the sizes - using defaults]);
fi

dnl Do we have any 64-bit data types?
if test "$ac_cv_sizeof_unsigned_int" != "8" \
   && test "$ac_cv_sizeof_unsigned_long" != "8" \
   && test "$ac_cv_sizeof_unsigned_long_long" != "8" \
   && test "$ac_cv_sizeof_uint64_t" != "8"; then
    AC_MSG_WARN([No 64-bit types.  Disabling TIGER/192, SHA-384, and SHA-512])
else
  if test x"$use_tiger192" = xyes ; then
     AC_SUBST(TIGER_O,tiger.o)
     AC_DEFINE(USE_TIGER192,1,[Define to include the TIGER/192 digest])
  fi

  if test "$use_old_tiger192" = yes ; then
     AC_SUBST(TIGER_O,tiger.o)
     AC_DEFINE(USE_TIGER192,1,[Define to include the TIGER/192 digest])
     AC_DEFINE(USE_OLD_TIGER,1,[Define to use the old fake OID for TIGER/192 digest support])
  fi

  if test x"$use_sha512" = xyes ; then
     AC_SUBST(SHA512_O,sha512.o)
     AC_DEFINE(USE_SHA512,1,[Define to include the SHA-384 and SHA-512 digests])
  fi
fi

dnl Checks for library functions.
AC_FUNC_FSEEKO
AC_FUNC_VPRINTF
AC_FUNC_FORK
AC_CHECK_FUNCS(strerror stpcpy strsep strlwr tcgetattr strtoul mmap)
AC_CHECK_FUNCS(strcasecmp strncasecmp ctermid times)
AC_CHECK_FUNCS(memmove gettimeofday getrusage setrlimit clock_gettime)
AC_CHECK_FUNCS(atexit raise getpagesize strftime nl_langinfo setlocale)
AC_CHECK_FUNCS(waitpid wait4 sigaction sigprocmask rand pipe stat)
AC_REPLACE_FUNCS(mkdtemp)

#
# check for gethrtime and run a testprogram to see whether
# it is broken.  It has been reported that some Solaris and HP UX systems 
# raise an SIGILL
#
AC_CACHE_CHECK([for gethrtime], 
               [gnupg_cv_func_gethrtime],
               [AC_TRY_LINK([#include <sys/times.h>],[
                   hrtime_t tv;
                   tv = gethrtime();
                 ],
                 [gnupg_cv_func_gethrtime=yes],
                 [gnupg_cv_func_gethrtime=no])
               ])
if test $gnupg_cv_func_gethrtime = yes; then
     AC_DEFINE([HAVE_GETHRTIME], 1,
               [Define if you have the `gethrtime(2)' function.])
     AC_CACHE_CHECK([whether gethrtime is broken], 
               [gnupg_cv_func_broken_gethrtime],
               [AC_TRY_RUN([
                   #include <sys/times.h>
                   int main () {
                   hrtime_t tv;
                   tv = gethrtime(); 
                 }
                 ],
                 [gnupg_cv_func_broken_gethrtime=no],
                 [gnupg_cv_func_broken_gethrtime=yes],
                 [gnupg_cv_func_broken_gethrtime=assume-no])
                ])
    if test $gnupg_cv_func_broken_gethrtime = yes; then
      AC_DEFINE([HAVE_BROKEN_GETHRTIME], 1,
      [Define if `gethrtime(2)' does not work correctly i.e. issues a SIGILL.])
    fi
fi
     

GNUPG_CHECK_MLOCK
GNUPG_FUNC_MKDIR_TAKES_ONE_ARG

dnl
dnl Check whether we can use Linux capabilities as requested
dnl
if test "$use_capabilities" = "yes" ; then
use_capabilities=no
AC_CHECK_HEADERS(sys/capability.h)
if test "$ac_cv_header_sys_capability_h" = "yes" ; then
  AC_CHECK_LIB(cap, cap_init, ac_need_libcap=1)
  if test "$ac_cv_lib_cap_cap_init" = "yes"; then
     AC_DEFINE(USE_CAPABILITIES,1,
               [define if capabilities should be used])
     AC_SUBST(CAPLIBS,"-lcap")
     use_capabilities=yes
  fi
fi
if test "$use_capabilities" = "no" ; then
    AC_MSG_WARN([[
***
*** The use of capabilities on this system is not possible.
*** You need a recent Linux kernel and some patches:
***   fcaps-2.2.9-990610.patch      (kernel patch for 2.2.9)
***   fcap-module-990613.tar.gz     (kernel module)
***   libcap-1.92.tar.gz            (user mode library and utilities)
*** And you have to configure the kernel with CONFIG_VFS_CAP_PLUGIN
*** set (filesystems menu). Be warned: This code is *really* ALPHA.
***]])
fi
fi


GNUPG_CHECK_IPC
if test "$ac_cv_header_sys_shm_h" = "yes"; then
  AC_DEFINE(USE_SHM_COPROCESSING,1,
            [define if the shared memory interface should be made available])
fi

dnl
dnl check whether we have a random device
dnl
if test "$try_dev_random" = yes ; then
    AC_CACHE_CHECK(for random device, ac_cv_have_dev_random,
    [if test -r "$NAME_OF_DEV_RANDOM" && test -r "$NAME_OF_DEV_URANDOM" ; then
      ac_cv_have_dev_random=yes; else ac_cv_have_dev_random=no; fi])
    if test "$ac_cv_have_dev_random" = yes; then
        AC_DEFINE(HAVE_DEV_RANDOM,1,
                 [defined if the system supports a random device] )
    fi
else
    AC_MSG_CHECKING(for random device)
    ac_cv_have_dev_random=no
    AC_MSG_RESULT(has been disabled)
fi


dnl
dnl Figure out the default random module.
dnl
random_modules=""
if test "$use_static_rnd" = default; then
     if test "$ac_cv_have_dev_random" = yes; then
        random_modules="rndlinux"
     else
         case "${target}" in
            *-*-mingw32*|*-*-cygwin*)
                random_modules="rndw32"
                ;;
            i?86-emx-os2|i?86-*-os2*emx)
                random_modules="rndos2"
                ;;
            m68k-atari-mint)
                random_modules="rndatari"
                ;;
            i?86-*-msdosdjgpp*)
                :
                ;;
            *)
                random_modules="rndlinux rndegd rndunix"
                AC_DEFINE(USE_ALL_RANDOM_MODULES, 1, 
                          [Allow to select random modules at runtime.])
                ;;
         esac
     fi
else
  if test "$use_static_rnd" = auto; then
     random_modules="rndlinux rndegd rndunix"
     AC_DEFINE(USE_ALL_RANDOM_MODULES, 1)
  else
     random_modules="rnd$use_static_rnd";
  fi
fi

if test -z "$random_modules"; then
   AC_MSG_ERROR(no random module available)
fi
print_egd_warning=no
for rndmod in $random_modules "" ; do
  case "$rndmod" in
    rndlinux)
         AC_DEFINE(USE_RNDLINUX,1, 
                  [Defined if the /dev/random based RNG should be used.])
         ;;
    rndunix)
         AC_DEFINE(USE_RNDUNIX,1, 
                  [Defined if the default Unix RNG should be used.])
         print_egd_warning=yes
          ;;
    rndegd)
         AC_DEFINE(USE_RNDEGD,1, 
                  [Defined if the EGD based RNG should be used.])
         EGDLIBS=$NETLIBS
         AC_SUBST(EGDLIBS)
         ;;
    rndw32)
         AC_DEFINE(USE_RNDW32,1, 
                  [Defined if the Windows specific RNG should be used.])
        ;;
   esac
done

dnl setup assembler stuff
AC_MSG_CHECKING(for mpi assembler functions)
if test -f $srcdir/mpi/config.links ; then
    . $srcdir/mpi/config.links
    AC_CONFIG_LINKS("$mpi_ln_list")
    ac_cv_mpi_extra_asm_modules="$mpi_extra_modules"
    ac_cv_mpi_sflags="$mpi_sflags"
    ac_cv_mpi_config_done="yes"
    AC_MSG_RESULT(done)
else
    AC_MSG_RESULT(failed)
    AC_MSG_ERROR([mpi/config.links missing!])
fi
MPI_EXTRA_ASM_OBJS=""
show_extraasm=""
if test "$ac_cv_mpi_extra_asm_modules" != ""; then
for i in $ac_cv_mpi_extra_asm_modules; do
    show_extraasm="$show_extraasm $i"
    MPI_EXTRA_ASM_OBJS="$MPI_EXTRA_ASM_OBJS $i.o"
done
fi
AC_SUBST(MPI_EXTRA_ASM_OBJS)
MPI_SFLAGS="$ac_cv_mpi_sflags"
AC_SUBST(MPI_SFLAGS)

# Sanity check regex.  Tests adapted from mutt.

AC_MSG_CHECKING([whether regular expression support is requested])
AC_ARG_ENABLE(regex,
[  --disable-regex         do not handle regular expressions in trust sigs],
     use_regex=$enableval, use_regex=yes)
AC_MSG_RESULT($use_regex)

if test "$use_regex" = yes ; then
  AC_MSG_CHECKING([whether the included regex lib is requested])
  AC_ARG_WITH(included-regex,
      [  --with-included-regex   use the included GNU regex library],
      [gnupg_cv_included_regex=yes],[gnupg_cv_included_regex=no])
  AC_MSG_RESULT($gnupg_cv_included_regex)

  if test $gnupg_cv_included_regex = no ; then
     # Does the system have regex functions at all?
     AC_CHECK_FUNC(regcomp,gnupg_cv_included_regex=no,
			   gnupg_cv_included_regex=yes)
  fi

  if test $gnupg_cv_included_regex = no ; then
     AC_CACHE_CHECK([whether your system's regexp library is broken],
       [gnupg_cv_regex_broken],
       AC_TRY_RUN([
#include <unistd.h>
#include <regex.h>
main() { regex_t blah ; regmatch_t p; p.rm_eo = p.rm_eo; return regcomp(&blah, "foo.*bar", REG_NOSUB) || regexec (&blah, "foobar", 0, NULL, 0); }],
       gnupg_cv_regex_broken=no, gnupg_cv_regex_broken=yes, gnupg_cv_regex_broken=yes))

     if test $gnupg_cv_regex_broken = yes ; then
      AC_MSG_WARN(your regex is broken - using the included GNU regex instead.)
      gnupg_cv_included_regex=yes
     fi
  fi

  if test $gnupg_cv_included_regex = yes; then
     AC_DEFINE(USE_GNU_REGEX,1,[ Define if you want to use the included regex lib ])
     AC_SUBST(REGEX_O,regex.o)
  fi
else

  AC_DEFINE(DISABLE_REGEX,1,[ Define to disable regular expression support ])
fi

dnl Do we have zlib? Must do it here because Solaris failed
dnl when compiling a conftest (due to the "-lz" from LIBS).
use_local_zlib=yes
if test "$g10_force_zlib" = "yes"; then
  :
else
  _cppflags="${CPPFLAGS}"
  _ldflags="${LDFLAGS}"

  AC_ARG_WITH(zlib,
  [  --with-zlib=DIR         use libz in DIR],[
    if test -d "$withval"; then
      CPPFLAGS="${CPPFLAGS} -I$withval/include"
      LDFLAGS="${LDFLAGS} -L$withval/lib"
    fi
  ])

  AC_CHECK_HEADER(zlib.h,
      AC_CHECK_LIB(z, deflateInit2_,
       use_local_zlib=no
       LIBS="$LIBS -lz",
       CPPFLAGS=${_cppflags} LDFLAGS=${_ldflags}),
       CPPFLAGS=${_cppflags} LDFLAGS=${_ldflags})
fi
 
if test "$use_local_zlib" = yes ; then
    AM_CONDITIONAL(ENABLE_LOCAL_ZLIB, true)
    AC_CONFIG_LINKS(zlib.h:zlib/zlib.h zconf.h:zlib/zconf.h )
    ZLIBS="../zlib/libzlib.a"
else
    AM_CONDITIONAL(ENABLE_LOCAL_ZLIB, false)
    ZLIBS=
fi
AC_SUBST(ZLIBS)


# Allow users to append something to the version string without
# flagging it as development version.  The user version parts is
# considered everything after a dash. 
if test "$development_version" != yes; then
  changequote(,)dnl
  tmp_pat='[a-zA-Z]'
  changequote([,])dnl
  if echo "$VERSION" | sed 's/-.*//' | grep "$tmp_pat" >/dev/null ; then
    development_version=yes
  fi
fi
if test "$development_version" = yes; then
    AC_DEFINE(IS_DEVELOPMENT_VERSION,1,
            [Defined if this is not a regular release])
fi

AM_CONDITIONAL(CROSS_COMPILING, test x$cross_compiling = xyes)

GNUPG_CHECK_GNUMAKE

# add some extra libs here so that previous tests don't fail for
# mysterious reasons - the final link step should bail out. 
case "${target}" in
    *-*-mingw32*)
        LIBS="$LIBS -lwsock32"
        ;;
    *)
       ;;
esac


if test "$GCC" = yes; then
    if test "$USE_MAINTAINER_MODE" = "yes"; then
        CFLAGS="$CFLAGS -Wall -Wcast-align -Wshadow -Wstrict-prototypes"
    else
        CFLAGS="$CFLAGS -Wall"
    fi
fi

AC_SUBST(NETLIBS)


if test "$print_egd_warning" = yes; then
  AC_MSG_WARN([[
***
*** The performance of the UNIX random gatherer module is not very good
*** and it does not keep the entropy pool over multiple invocations of
*** GnuPG.  The suggested way to overcome this problem is to use the
***
***               Entropy Gathering Daemon (EGD)
***
*** which provides a entropy source for the whole system.  It is written
*** in Perl and available at the GnuPG FTP servers.  For more information
*** consult the GnuPG webpages:
***
***           http://www.gnupg.org/download/#EGD
***
*** You may want to run ./configure with --enable-static-rnd=egd or
*** --enable-static-rnd=auto to use it.
***]])
fi

# Note the \\\\ for backslashes.  Autoconf eats one layer, leaving \\

AC_CONFIG_COMMANDS(g10defs.h,[[
cat >g10defs.tmp <<G10EOF
/* Generated automatically by configure */
#ifdef HAVE_DRIVE_LETTERS
#define G10_LOCALEDIR     "c:\\\\lib\\\\gnupg\\\\locale"
#define GNUPG_LIBDIR      "c:\\\\lib\\\\gnupg"
#define GNUPG_LIBEXECDIR  "c:\\\\lib\\\\gnupg"
#define GNUPG_DATADIR     "c:\\\\lib\\\\gnupg"
#define GNUPG_HOMEDIR     "c:\\\\gnupg"
#else
#define G10_LOCALEDIR     "${datadir}/locale"
#define GNUPG_LIBDIR      "${libdir}/gnupg"
#define GNUPG_DATADIR     "${datadir}/gnupg"
#ifdef __VMS
#define GNUPG_HOMEDIR "/SYS\$LOGIN/gnupg" 
#else
#define GNUPG_HOMEDIR "~/.gnupg" 
#endif
#endif
/* those are here to be redefined by handcrafted g10defs.h.
   Please note that the string version must not contain more
   than one character because the using code assumes strlen()==1 */
#ifdef HAVE_DOSISH_SYSTEM
#define DIRSEP_C '\\\\'
#define EXTSEP_C '.'
#define DIRSEP_S "\\\\"
#define EXTSEP_S "."
#else
#define DIRSEP_C '/'
#define EXTSEP_C '.'
#define DIRSEP_S "/"
#define EXTSEP_S "."
#endif
G10EOF
cat mpi/mpi-asm-defs.h >>g10defs.tmp 
if cmp -s g10defs.h g10defs.tmp 2>/dev/null; then
    echo "g10defs.h is unchanged"
    rm -f g10defs.tmp
else
    rm -f g10defs.h
    mv g10defs.tmp g10defs.h
    echo "g10defs.h created"
fi
]],[[
prefix=$prefix
exec_prefix=$exec_prefix
libdir=$libdir
libexecdir=$libexecdir
datadir=$datadir
DATADIRNAME=$DATADIRNAME
]])


AC_CONFIG_FILES([
Makefile
intl/Makefile
po/Makefile.in
util/Makefile
mpi/Makefile
cipher/Makefile
g10/Makefile
keyserver/Makefile
keyserver/gpgkeys_mailto
keyserver/gpgkeys_test
doc/Makefile
tools/Makefile
zlib/Makefile
checks/Makefile
])
AC_OUTPUT

# Give some feedback
echo
echo   "                Configured for: $PRINTABLE_OS_NAME ($target)"
if test -n "$show_extraasm"; then
  echo "  Extra cpu specific functions:$show_extraasm"
fi
echo