/usr/share/aclocal/mailutils.m4 is in libmailutils-dev 1:3.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | dnl Copyright (C) 2006-2007, 2010-2012, 2014-2017 Free Software
dnl Foundation, Inc.
dnl
dnl GNU Mailutils is free software; you can redistribute it and/or
dnl modify it under the terms of the GNU General Public License as
dnl published by the Free Software Foundation; either version 3, or (at
dnl your option) any later version.
dnl
dnl GNU Mailutils is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dnl General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>.
m4_define([am_mu_vercmp],[
m4_pushdef([_ver_A_],m4_car($1))dnl
m4_pushdef([_ver_B_],m4_car($2))dnl
m4_if(_ver_B_,,:,[if test m4_if(_ver_A_,,0,_ver_A_) -lt _ver_B_; then
$3
elif test m4_if(_ver_A_,,0,_ver_A_) -eq _ver_B_; then
am_mu_vercmp(m4_cdr($1),m4_cdr($2),[$3])
fi
m4_popdef([_ver_A_])dnl
m4_popdef([_ver_B_])dnl])])
dnl AM_GNU_MAILUTILS(minversion, link-req, [act-if-found], [ac-if-not-found])
dnl $1 $2 $3 $4
dnl Verify if GNU Mailutils is installed and if its version is `minversion'
dnl or newer. If not installed, execute `ac-if-not-found' or, if it is not
dnl given, spit out an error message.
dnl
dnl If Mailutils is found, set:
dnl MAILUTILS_CONFIG to the full name of the mailutils-config program;
dnl MAILUTILS_VERSION to the Mailutils version (string);
dnl MAILUTILS_VERSION_MAJOR Mailutils version: major number
dnl MAILUTILS_VERSION_MINOR Mailutils version: minor number
dnl MAILUTILS_VERSION_PATCH Mailutils version: patchlevel number (or 0,
dnl if not defined)
dnl MAILUTILS_LIBS to the list of cc(1) flags needed to link in the
dnl libraries requested by `link-req';
dnl MAILUTILS_INCLUDES to the list of cc(1) flags needed to set include
dnl paths to the Mailutils headers.
dnl
dnl Finally, if `act-if-found' is given, execute it. Otherwise, append the
dnl value of $MAILUTILS_LIBS to LIBS.
dnl
AC_DEFUN([AM_GNU_MAILUTILS],
[AC_PATH_PROG(MAILUTILS_CONFIG, mailutils-config, none, $PATH)
if test "$MAILUTILS_CONFIG" = "none"; then
m4_if($4,,[AC_MSG_ERROR(cannot find GNU Mailutils)], [$4])
fi
AC_SUBST(MAILUTILS_CONFIG)
AC_SUBST(MAILUTILS_VERSION)
AC_SUBST(MAILUTILS_INCLUDES)
AC_SUBST(MAILUTILS_LIBS)
m4_ifndef([MU_VERSION_PARSE_DEFINED],[[
mu_version_parse() {
set -- `echo "@S|@1" | sed 's/^\([0-9\.][0-9\.]*\).*/\1/;s/\./ /g'`
major=@S|@{1:-0}
minor=@S|@{2:-0}
patch=@S|@{3:-0}
}]
m4_pushdef([MU_VERSION_PARSE_DEFINED])])
MAILUTILS_VERSION=`$MAILUTILS_CONFIG --info version|sed 's/VERSION=//'`
mu_version_parse $MAILUTILS_VERSION
AC_DEFINE_UNQUOTED([MAILUTILS_VERSION_MAJOR], $major, [Mailutils version major number])
AC_DEFINE_UNQUOTED([MAILUTILS_VERSION_MINOR], $minor, [Mailutils version minor number])
AC_DEFINE_UNQUOTED([MAILUTILS_VERSION_PATCH], $patch, [Mailutils version patchlevel number])
AC_DEFINE_UNQUOTED(MAILUTILS_VERSION, "$MAILUTILS_VERSION", [Mailutils version number])
m4_if($1,,,[
am_mu_vercmp(m4_quote($major, $minor, $patch),
m4_dquote(m4_bpatsubst($1, [\.],[,])),
[AC_MSG_ERROR([Mailutils v. $MAILUTILS_VERSION is too old; required is at least ]$1)])
])
req=""
for x in $2
do
case $x in
mailer) test $MAILUTILS_VERSION_NUMBER -ge 1200 && req="$req $x";;
*) req="$req $x"
esac
done
MAILUTILS_LIBS=`$MAILUTILS_CONFIG --link $req`
MAILUTILS_INCLUDES=`$MAILUTILS_CONFIG --compile`
m4_if($3,,[LIBS="$LIBS $MAILUTILS_LIBS"], [$3])
])
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