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# This file is part of Mailfromd.  -*- autoconf -*-
# Copyright (C) 2005-2024 Sergey Poznyakoff
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

AC_PREREQ([2.71])
m4_define([MF_VERSION_MAJOR], 9)
m4_define([MF_VERSION_MINOR], 0)
dnl m4_define([MF_VERSION_PATCH], 0)
AC_INIT([mailfromd],
        MF_VERSION_MAJOR.MF_VERSION_MINOR[]m4_ifdef([MF_VERSION_PATCH],.MF_VERSION_PATCH),
        [bug-mailfromd@gnu.org.ua],
       [mailfromd],
       [http://www.gnu.org.ua/software/mailfromd])
AC_CONFIG_SRCDIR([src/mailfromd.h])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE([1.16.5 gnits tar-ustar dist-bzip2 dist-xz std-options silent-rules])

# Enable silent rules by default:
AM_SILENT_RULES([yes])

#
AC_DEFINE_UNQUOTED([MAILFROMD_VERSION_MAJOR], MF_VERSION_MAJOR,
                   [Major version number])
AC_DEFINE_UNQUOTED([MAILFROMD_VERSION_MINOR], MF_VERSION_MINOR,
                   [Minor version number])
AC_DEFINE_UNQUOTED([MAILFROMD_VERSION_PATCH],
                   m4_ifdef([MF_VERSION_PATCH],MF_VERSION_PATCH,0),
                   [Patchlevel number])

# Checks for programs.
AC_PROG_CC
AC_PROG_LN_S
PKG_PROG_PKG_CONFIG
AC_PATH_PROG([BISON],[bison],[\$(SHELL) \$(top_srcdir)/build-aux/missing bison])
AC_PATH_PROG([FLEX],[flex],[\$(SHELL) \$(top_srcdir)/build-aux/missing flex])

LT_INIT

# Debugging mode
MU_DEBUG_MODE
MF_GCC_QUIRKS

# Checks for libraries.
AC_CHECK_LIB(socket, socket)
AC_CHECK_LIB(nsl, gethostbyaddr)
AC_CHECK_LIB(rt, nanosleep)

# Checks for header files.
AC_CHECK_HEADERS([sysexits.h paths.h])

# Checks for typedefs, structures, and compiler characteristics.

IU_CHECK_MEMBERS([struct msghdr.msg_control, struct msghdr.msg_accrights], , ,
                 [#include <sys/types.h>
	          #include <sys/socket.h>])

# Checks for library functions.
AC_CHECK_FUNCS([setegid setregid setresgid seteuid setreuid \
                sysconf getdtablesize])
AC_REPLACE_FUNCS(daemon)

# Check for GNU Mailutils
AM_GNU_MAILUTILS([3.4], [all auth dbm sieve], [:])
if test "$($MAILUTILS_BIN info WITH_GNUTLS)" = "WITH_GNUTLS"; then
  status_gnutls=1
else
  status_gnutls=0
fi

AC_DEFINE_UNQUOTED([WITH_MAILUTILS_GNUTLS], [$status_gnutls], [Whether mailutils supports GnuTLS])

AC_CHECK_LIB([adns], [adns_init],,
    [AC_MSG_ERROR([required library libadns not found])])

AC_SUBST([NETTLE_LIBS])
AC_CHECK_HEADERS([nettle/sha2.h nettle/buffer.h nettle/rsa.h nettle/base64.h])
if test "$ac_cv_header_nettle_sha2_h$ac_cv_header_nettle_buffer_h$ac_cv_header_nettle_rsa_h$ac_cv_header_nettle_base64_h" = "yesyesyesyes"; then
  AC_CHECK_LIB([gmp],[__gmpz_init],
    [AC_CHECK_LIB([hogweed],[nettle_rsa_sha256_sign],[
       AC_CHECK_LIB([nettle],[nettle_sha256_init],[
         NETTLE_LIBS="-lhogweed -lnettle -lgmp"
       ],[],[-lgmp])])])
fi
AM_CONDITIONAL([NETTLE_COND],[test -n "$NETTLE_LIBS"])

if test -n "$NETTLE_LIBS"; then
  AC_DEFINE([WITH_DKIM], [1], [Enable DKIM functions])
fi

### Check for Emacs site-lisp directory
AM_PATH_LISPDIR

if test "$EMACS" != "no"; then
	lisp_LISP='$(LISPSRC)'
fi
AC_SUBST(lisp_LISP)

# Gettext.
AM_GNU_GETTEXT([external], [need-formatstring-macros])
AM_GNU_GETTEXT_VERSION([0.19])

# Syslog
AC_ARG_ENABLE([syslog-async],
              AS_HELP_STRING([--enable-syslog-async],
	                     [compile non-blocking version of syslog]),
              [case "${enableval}" in
               yes) syslog_async=yes ;;
               no)  syslog_async=no ;;
               *)   AC_MSG_ERROR([bad value ${enableval} for --enable-syslog-async]) ;;
               esac],[syslog_async=no])

if test $syslog_async = "yes"; then
  AC_ARG_VAR([DEFAULT_SYSLOG_ASYNC],
             [Define to 1 if syslog-async is being used by default])
  if test -z "$DEFAULT_SYSLOG_ASYNC"; then
    DEFAULT_SYSLOG_ASYNC=0
  fi
  AC_DEFINE_UNQUOTED([DEFAULT_SYSLOG_ASYNC],$DEFAULT_SYSLOG_ASYNC,
                     [Define to 1 to use syslog_async by default])
  AC_SUBST([BUILD_SYSLOG_ASYNC], '$(SYSLOG_ASYNC_O)')
  AC_DEFINE([USE_SYSLOG_ASYNC], [1], [Define if syslog-async is being used])
fi
# ######################
# Default database type
# ######################

# A map of supported database types. The format is DBTYPE:FEATURE,
# where FEATURE is the corresponding mailutils feature as listed by
# 'mailutils info', without the WITH_ prefix and converted to lowercase.
# The entries are sorted in ascending preference order.
# Traditionally Mailfromd preferred Berkeley DB over GDBM. 
db_map="
bdb:bdb
gdbm:gdbm
kc:kyotocabinet
tc:tokyocabinet
ndbm:ndbm
"

# Convert database type to mailutils feature
db_type_to_feature() {
    # Normalize the input
    key=$(echo "$1" | tr A-Z a-z)
    # Augment db_map with the line "$key:$key" and select from the resulting
    # input the first entry starting with "$key:". On output, replace it with
    # the characters that follow : up to the newline.
    # The first expression looks for the string in the first line of input.
    # If found, it replaces it and branches to the end of script. The second
    # expression then has no chance to catch, since the scanning resumes from
    # line 2. Otherwise, if key is not found in the first line, the second
    # expression searches for it in the remaining lines.
    # The default entry "$key:$key" ensures the normalized key is returned
    # if no match was found.
    sed -n -e "1s/^$key"'://p;t' -e '1,//{s///p}' <<EOF
$db_map
$key:$key
EOF
}

# Convert mailutils feature to the database type
db_feature_to_type() {
    sed -n /:$(echo "$1" | tr A-Z a-z)'$/s/:.*//p' <<EOF
$db_map
EOF
}

# Produce the list of mailutils DBM features
db_feature_list() {
    sed 's/^.*://' <<EOF
$db_map
EOF
}

AC_ARG_VAR([DEFAULT_DB_TYPE],[Set default database type])
  
AC_ARG_WITH([gdbm],
             AS_HELP_STRING([--with-gdbm],
	                    [use GNU DBM by default]),
            [
case "${withval}" in
  yes) DEFAULT_DB_TYPE=gdbm;;
  no)  ;;
  *)   AC_MSG_ERROR(bad value ${withval} for --with-gdbm) ;;
esac])

AC_ARG_WITH([berkeley-db],
            AS_HELP_STRING([--with-berkeley-db],
	                   [use Berkeley DB by default]),
            [
case "${withval}" in
  no)  ;;
  *)   DEFAULT_DB_TYPE=bdb;;
esac])

AC_ARG_WITH([dbm],
            AS_HELP_STRING([--with-dbm=TYPE],
	                   [set default DBM type]),
            [DEFAULT_DB_TYPE=$withval])

AH_TEMPLATE([DEFAULT_DB_TYPE], [Define default database type])
if test -n "$DEFAULT_DB_TYPE"; then
  if ! mailutils info $(db_type_to_feature $DEFAULT_DB_TYPE) >/dev/null; then
    AC_MSG_ERROR([requested DBM type $DEFAULT_DB_TYPE not supported by Mailutils])
  fi
else
  fl=$(db_feature_list)
  feature=$(mailutils info $fl | head -n 1 | sed 's/WITH_//')
  if test -n "$feature"; then
      DEFAULT_DB_TYPE=$(db_feature_to_type $feature)
      if test -z "$DEFAULT_DB_TYPE"; then
        AC_MSG_WARN([can't select database type $feature, falling back to default])
      fi
  fi
fi
if test -n "$DEFAULT_DB_TYPE"; then
  AC_DEFINE_UNQUOTED([DEFAULT_DB_TYPE], "$DEFAULT_DB_TYPE")
  status_dbm=$DEFAULT_DB_TYPE
else
  AC_DEFINE_UNQUOTED([DEFAULT_DB_TYPE], NULL)
fi

## Preprocessor
AC_ARG_WITH([preprocessor],
            AS_HELP_STRING([--without-preprocessor],
	                   [do not use external preprocessor]),
            [
case "${withval}" in
yes) use_ext_pp=yes ;;
no)  use_ext_pp=no ;;
*)   AC_MSG_ERROR(bad value ${withval} for --with-preprocessor) ;;
esac],[use_ext_pp=yes])

AC_ARG_VAR([DEFAULT_PREPROCESSOR],
           [Set default preprocessor name])
if test -z "$DEFAULT_PREPROCESSOR" ; then
  DEFAULT_PREPROCESSOR="m4 -s"
fi
if test $use_ext_pp != no; then
  save_PATH=$PATH
  PREPROC_OPTIONS=`echo $DEFAULT_PREPROCESSOR | sed -n 's/[[^ ]][[^ ]]* //p'`
  case "$DEFAULT_PREPROCESSOR" in
  /*) PATH=`expr "$DEFAULT_PREPROCESSOR" : '\(.*\)/.*'`:$PATH
      DEFAULT_PREPROCESSOR=`expr "$DEFAULT_PREPROCESSOR" : '.*/\(.*\)'`;;
  esac
  AC_PATH_PROG(PPBIN, $DEFAULT_PREPROCESSOR)
  DEFAULT_PREPROCESSOR=$PPBIN
  if test -n "$DEFAULT_PREPROCESSOR"; then
    use_ext_pp=yes
    DEFAULT_PREPROCESSOR="$DEFAULT_PREPROCESSOR $PREPROC_OPTIONS"
    case $PPBIN in
    *m4) AC_SUBST(PP_SETUP_FILE,'pp-setup');; # Install default pp-setup
    esac
  else
    use_ext_pp=no
  fi
  PATH=$save_PATH
else
  unset DEFAULT_PREPROCESSOR
fi
AM_CONDITIONAL([PREPROC_COND], [test "$use_ext_pp" = yes])

AC_ARG_WITH([readline],
            AS_HELP_STRING([--without-readline],
	                   [do not use readline]),
            [
case "${withval}" in
  yes) usereadline=yes ;;
  no)  usereadline=no ;;
  *)   AC_MSG_ERROR(bad value ${withval} for --without-readline) ;;
esac],[usereadline=maybe])

# Test for GNU Readline
AC_SUBST(READLINE_LIBS)

if test "$usereadline" != "no"; then
  
  dnl FIXME This should only link in the curses libraries if it's
  dnl really needed!
  
  dnl Check for Curses libs.
  CURSES_LIBS=
  for lib in ncurses curses termcap
  do
    AC_CHECK_LIB($lib, tputs, [CURSES_LIBS="-l$lib"; break])
  done

  saved_LIBS=$LIBS
  LIBS="$LIBS $CURSES_LIBS"
  AC_CHECK_LIB(readline, readline, mf_have_readline=yes)
  LIBS=$saved_LIBS
  
  if test "$mf_have_readline" = "yes"; then
    AC_CHECK_HEADERS(readline/readline.h,
  		     AC_DEFINE(WITH_READLINE,1,[Enable use of readline]))
    READLINE_LIBS="-lreadline $CURSES_LIBS"
    saved_LIBS=$LIBS
    LIBS="$LIBS $READLINE_LIBS"
    AC_CHECK_FUNCS(rl_completion_matches)
    LIBS=$saved_LIBS
    usereadline="yes"
  else
    if test "$usereadline" = "yes"; then
      AC_MSG_WARN(readline requested but does not seem to be installed)
    fi
    usereadline="no"
  fi
fi

AH_BOTTOM([
/* Some older versions of readline have completion_matches */
#ifndef HAVE_RL_COMPLETION_MATCHES
# define rl_completion_matches completion_matches
#endif])


AC_SUBST(MILTER, '../gacopyz/libgacopyz.a')
AC_SUBST(MILTER_INCLUDES, '-I$(top_srcdir)/gacopyz')

# Set default state directory
AC_SUBST(DEFAULT_STATE_DIR)
AC_MSG_CHECKING(for default mfd state directory)

AC_ARG_VAR([DEFAULT_STATE_DIR],
           [Set default mfd state directory])

if test -z "$DEFAULT_STATE_DIR"; then
  DEFAULT_STATE_DIR='$(localstatedir)/$(PACKAGE)'
fi

AC_MSG_RESULT($DEFAULT_STATE_DIR)

# Prepare default socket spec
AC_SUBST(DEFAULT_SOCKET)
AC_MSG_CHECKING(for default communication socket)

AC_ARG_VAR([DEFAULT_SOCKET],
           [Set default communication socket.])

if test -z "$DEFAULT_SOCKET"; then
  DEFAULT_SOCKET='mailfrom'
fi

AC_MSG_RESULT($DEFAULT_SOCKET)

# Test for default user name
AC_SUBST(DEFAULT_USER)
AC_MSG_CHECKING(for default user name)

AC_ARG_VAR([DEFAULT_USER],
           [Set default user name])

if test -z "$DEFAULT_USER"; then
  DEFAULT_USER=mail
fi

AC_MSG_RESULT($DEFAULT_USER)
AC_DEFINE_UNQUOTED(DEFAULT_USER, "$DEFAULT_USER", [Default mfd user])

# Test for default expiration interval
AC_SUBST(DEFAULT_EXPIRE_INTERVAL)
AC_MSG_CHECKING(for default expiration interval)

AC_ARG_VAR([DEFAULT_EXPIRE_INTERVAL],
           [Set default expiration interval])

if test -z "$DEFAULT_EXPIRE_INTERVAL"; then
  DEFAULT_EXPIRE_INTERVAL=86400
fi

AC_MSG_RESULT($DEFAULT_EXPIRE_INTERVAL)
AC_DEFINE_UNQUOTED(DEFAULT_EXPIRE_INTERVAL, $DEFAULT_EXPIRE_INTERVAL,
                   [Default expiration interval])

# Test for default log facility
AC_SUBST(DEFAULT_LOG_FACILITY)
AC_MSG_CHECKING(for default log facility)

AC_ARG_VAR([DEFAULT_LOG_FACILITY],
           [Set default log facility])

if test -z "$DEFAULT_LOG_FACILITY"; then
  DEFAULT_LOG_FACILITY=mail
fi

DEFAULT_LOG_FACILITY=`echo $DEFAULT_LOG_FACILITY | tr a-z A-Z`
case $DEFAULT_LOG_FACILITY in
LOG_*) ;;
*)   DEFAULT_LOG_FACILITY=LOG_$DEFAULT_LOG_FACILITY;;
esac

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <syslog.h>]],
                  [[int lf = $DEFAULT_LOG_FACILITY]])],
		  [:],
		  [AC_MSG_ERROR($DEFAULT_LOG_FACILITY: Unknown syslog facility)])

AC_MSG_RESULT($DEFAULT_LOG_FACILITY)
AC_DEFINE_UNQUOTED(DEFAULT_LOG_FACILITY, $DEFAULT_LOG_FACILITY,
                   [Default log facility])

# Test for setproctitle
MF_PROCTITLE

# Test for libpmilter
AC_SUBST(META1_LIBS)
AC_SUBST(META1_INCLUDES)

AC_ARG_ENABLE([pmilter],
              AS_HELP_STRING([--enable-pmilter[[=PATH]]],
	                     [enable pmilter support]),
              [case "${enableval}" in
               yes) enable_pmilter=yes;;
               no)  enable_pmilter=no;;
               /*)  dir=$enableval/lib/mta
                    if test -d $dir; then
                      META1_LIBS="-L$dir"
                    else
                      AC_MSG_ERROR([$dir: No such directory])
                    fi

		    dir=$enableval/include
		    if test -d $dir/sm; then
                      META1_INCLUDES="-I$dir"
                    else
                      AC_MSG_ERROR([$dir: No such directory])
                    fi
		    
                    enable_pmilter=yes
                    ;;
               *)   AC_MSG_ERROR([Bad argument to --enable-pmilter])
               esac],[enable_pmilter=no])

if test "$enable_pmilter" = yes; then
  saved_LIBS=$LIBS
  AC_SUBST(PTHREAD_LIBRARIES)
  AC_CHECK_LIB(pthread, pthread_self,
               [ have_pthread=yes
                 PTHREAD_LIBRARIES="-lpthread -lc" ],
               [ PTHREAD_LIBRARIES="-lpthread"
                 AC_CHECK_FUNC(pthread_self,
                               [HAVE_PTHREAD=yes]) ])
  if test $have_pthread != yes; then
    AC_MSG_ERROR([POSIX threads library not found. Please install it and then reconfigure])
  fi

  save_CPPFLAGS=$CPPFLAGS
  CPPFLAGS="$CPPFLAGS $META1_INCLUDES"
  AC_CHECK_HEADERS([sm/error.h sm/hdrmoddef.h sm/pmfapi.h sm/pmilter.h sm/smreplycodes.h sm/generic.h sm/mfapi.h sm/pmfdef.h sm/smmts.h],
                   [],
                   [AC_MSG_ERROR([Required header file $ac_header not found])],
                   [
#ifdef HAVE_SM_ERROR_H
# include <sm/error.h>
#endif])
  CFFPLAGS=$save_CPPFLAGS
  
  libs="pmilter pmutil evthr thr rcbcommr rcbr mtar cstrr replr"
  save_LDFLAGS=$LDFLAGS
  LDFLAGS="$LDFLAGS $META1_LIBS"
  for file in $libs
  do
    AC_CHECK_LIB($file, main,
                 [META1_LIBS="$META1_LIBS -l$file"],
                 [AC_MSG_ERROR([Required library lib$file not found])])
  done
  LDFLAGS=$save_LDFLAGS

  IU_CHECK_MEMBERS([struct pmilter_S.pmfi_thrmax_s,
                    struct pmilter_S.pmfi_thrmax_h,
		    struct pmilter_S.pmfi_fdmax], , ,
		   [#include "sm/error.h"
		    #include "sm/smreplycodes.h"
		    #include "sm/pmilter.h"
		    #include "sm/pmfdef.h"
		    #include "sm/pmfapi.h"])
  
  LIBS="$LIBS $META1_LIBS"
  AC_CHECK_FUNCS([sm_pmfi_setmacs])
  LIBS=$saved_LIBS
fi

AM_CONDITIONAL([PMULT_COND], [test "$enable_pmilter" = yes])

# GeoIP2
AC_ARG_WITH([geoip2],
            AS_HELP_STRING([--with-geoip2],
	                   [use MaxMind GeoIP2 library]),
            [
case "${withval}" in
  yes) status_geoip2=yes ;;
  no)  status_geoip2=no ;;
  *)   AC_MSG_ERROR(bad value ${withval} for --with-geoip2) ;;
esac],[status_geoip2=maybe])

if test "$status_geoip2" != "no"; then
  PKG_CHECK_MODULES([GEOIP2], [libmaxminddb], [status_geoip2=yes], [
    if test $status_geoip2 = "yes"; then
      AC_MSG_WARN(libmaxminddb requested but does not seem to be installed)
    fi
    status_geoip2="no"])
fi
if test "$status_geoip2" = "yes"; then
  AC_DEFINE([WITH_GEOIP2], [1], [Enable use of Maxmind GeoIP2 library])
fi

## Support for dynamically loaded modules
AC_ARG_ENABLE([mfmod],
            AS_HELP_STRING([--enable-mfmod],
	                   [enable support for dynamically loaded modules]),
            [case $enableval in
	     yes|no) status_mfmod=$enableval;;
	     *) AC_MSG_ERROR([bad value ${enableval} for --enable-mfmod]);;
	     esac],
	    [status_mfmod=probe])

AC_SUBST([DLFCN_LIBS])
if test $status_mfmod != no; then
  AC_CHECK_HEADERS([dlfcn.h],
    [AC_CHECK_FUNC(dlopen,
      [status_mfmod=yes],
      [AC_CHECK_LIB(dl, dlopen,
       [status_mfmod=yes
        DLFCN_LIBS=-ldl],
       [status_mfmod=no])])],
    [status_mfmod=no])
fi

AM_CONDITIONAL([MFMOD_COND],[test $status_mfmod = yes])
if test $status_mfmod = yes; then
  AC_DEFINE([WITH_MFMOD], [1], [Enable support for dynamically loaded modules])
fi

## Imprimatur
IMPRIMATUR_INIT
if test $RENDITION = "PROOF"; then
  if test -r $srcdir/git-describe; then
    GIT_DESCRIBE=`sed '2,$d' $srcdir/git-describe`
    AC_DEFINE_UNQUOTED([GIT_DESCRIBE], "$GIT_DESCRIBE",
                       [The most recent git tag])
  fi
fi

# Initialize the test suite.
AC_CONFIG_TESTDIR(tests)
AC_CONFIG_FILES([tests/Makefile tests/atlocal])
AM_MISSING_PROG([AUTOM4TE], [autom4te])

AC_CONFIG_COMMANDS([status],[
cat <<EOF

*******************************************************************
Mailfromd configured with the following settings:

Mailutils version......................... $mu_version
External preprocessor..................... $ext_pp
DBM version............................... $status_dbm
Default user.............................. $user
State directory........................... $stat_dir
Socket.................................... $socket
Expiration interval....................... $expire
Compile asynchronous syslog............... $syslog_async
Readline (for mtasim)..................... $usereadline
Documentation rendition type.............. $rendition
Enable pmilter support.................... $enable_pmilter
Enable GeoIP2 support..................... $status_geoip2
Enable DKIM support....................... $status_dkim
Dynamically loaded modules (mfmod)........ $status_mfmod
Callout STARTTLS.......................... $status_callout_starttls
*******************************************************************

EOF
],
[mu_version=$MAILUTILS_VERSION
if test -z "$DEFAULT_PREPROCESSOR"; then
  ext_pp=no
else
  ext_pp="$DEFAULT_PREPROCESSOR"
fi
status_dbm="$status_dbm"
stat_dir='$DEFAULT_STATE_DIR'
socket='$DEFAULT_SOCKET'
user=$DEFAULT_USER
expire=$DEFAULT_EXPIRE_INTERVAL
usereadline=$usereadline
rendition=$RENDITION
syslog_async=$syslog_async
enable_pmilter=$enable_pmilter
status_geoip2=$status_geoip2
if test -n "$NETTLE_LIBS"; then
  status_dkim=yes
else
  status_dkim=no
fi
status_mfmod=$status_mfmod
if test "$status_gnutls" = 1; then
  status_callout_starttls=yes
else
  status_callout_starttls=no
fi
])

AC_CONFIG_FILES([Makefile
	         lib/Makefile
	         gacopyz/Makefile
                 src/Makefile
                 src/builtin/Makefile
                 mflib/Makefile
		 mfmod/Makefile
                 mtasim/Makefile
                 pmult/Makefile
                 elisp/Makefile
                 po/Makefile.in
                 etc/Makefile
                 doc/Makefile])	  
AC_OUTPUT



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