dnl ##
dnl ##  OSSP lmtp2nntp - Mail to News Gateway
dnl ##  Copyright (c) 2001-2003 Ralf S. Engelschall <rse@engelschall.com>
dnl ##  Copyright (c) 2001-2003 The OSSP Project <http://www.ossp.org/>
dnl ##  Copyright (c) 2001-2003 Cable & Wireless Germany <http://www.cw.com/de/>
dnl ##
dnl ##  This file is part of OSSP lmtp2nntp, an LMTP speaking local
dnl ##  mailer which forwards mails as Usenet news articles via NNTP.
dnl ##  It can be found at http://www.ossp.org/pkg/tool/lmtp2nntp/.
dnl ##
dnl ##  This program is free software; you can redistribute it and/or
dnl ##  modify it under the terms of the GNU General Public  License
dnl ##  as published by the Free Software Foundation; either version
dnl ##  2.0 of the License, or (at your option) any later version.
dnl ##
dnl ##  This program 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 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 this file; if not, write to the Free Software
dnl ##  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
dnl ##  USA, or contact the OSSP project <ossp@ossp.org>.
dnl ##
dnl ##  aclocal.m4: GNU Autoconf local macros
dnl ##

dnl ##
dnl ##  Support for Platform IDs
dnl ##
dnl ##  configure.in:
dnl ##    AC_PLATFORM(<variable>)
dnl ##

AC_DEFUN(AC_PLATFORM,[
if test ".$host" != .NONE && test ".$host" != .; then
    $1="$host"
else
    $1=`${CONFIG_SHELL-/bin/sh} $srcdir/config.guess`
fi
$1=`${CONFIG_SHELL-/bin/sh} $srcdir/config.sub $$1` || exit 1
AC_SUBST($1)
if test ".$enable_subdir" != .yes; then
    echo "Platform: ${TB}${$1}${TN}"
fi
])dnl

dnl ##
dnl ##  Support for Configuration Headers
dnl ##
dnl ##  configure.in:
dnl ##    AC_HEADLINE(<short-name>, <long-name>,
dnl ##                <vers-var>, <vers-file>,
dnl ##                <copyright>)
dnl ##

AC_DEFUN(AC_HEADLINE,[dnl
AC_DIVERT_PUSH(NOTICE)dnl
#   configuration header
if test ".`echo dummy [$]@ | grep help`" = .; then
    #   bootstrapping shtool
    ac_prog=[$]0
changequote(, )dnl
    ac_srcdir=`echo $ac_prog | sed -e 's%/[^/][^/]*$%%' -e 's%\([^/]\)/*$%\1%'`
changequote([, ])dnl
    test ".$ac_srcdir" = ".$ac_prog" && ac_srcdir=.
    ac_shtool="$ac_srcdir/shtool"

    #   find out terminal sequences
    TB=`$ac_shtool echo -n -e %B 2>/dev/null`
    TN=`$ac_shtool echo -n -e %b 2>/dev/null`

    #   find out package version
    $3_STR="`$ac_shtool version -l c -d long $ac_srcdir/$4`"
    AC_SUBST($3_STR)

    #   friendly header ;)
    echo "Configuring ${TB}$1${TN} ($2), Version ${TB}${$3_STR}${TN}"
    echo "$5"

    #   additionally find out hex version
    $3_HEX="`$ac_shtool version -l c -d hex $ac_srcdir/$4`"
    AC_SUBST($3_HEX)
fi
AC_DIVERT_POP()
])dnl

dnl ##
dnl ##  Check whether compiler option works
dnl ##
dnl ##  configure.in:
dnl ##    AC_COMPILER_OPTION(<name>, <display>, <option>,
dnl ##                       <action-success>, <action-failure>)
dnl ##

AC_DEFUN(AC_COMPILER_OPTION,[dnl
AC_MSG_CHECKING(whether compiler option(s) $2 work)
AC_CACHE_VAL(ac_cv_compiler_option_$1,[
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $3"
AC_TRY_COMPILE([],[], ac_cv_compiler_option_$1=yes, ac_cv_compiler_option_$1=no)
CFLAGS="$SAVE_CFLAGS"
])dnl
if test ".$ac_cv_compiler_option_$1" = .yes; then
    ifelse([$4], , :, [$4])
else
    ifelse([$5], , :, [$5])
fi
AC_MSG_RESULT([$ac_cv_compiler_option_$1])
])dnl

dnl ##
dnl ##  Debugging Support
dnl ##
dnl ##  configure.in:
dnl ##    AC_CHECK_DEBUGGING
dnl ##

AC_DEFUN(AC_CHECK_DEBUGGING,[dnl
AC_ARG_ENABLE(debug,dnl
[  --enable-debug          build for debugging (default=no)],
[dnl
if test ".$ac_cv_prog_gcc" = ".yes"; then
    case "$CFLAGS" in
        *-O* ) ;;
           * ) CFLAGS="$CFLAGS -O2" ;;
    esac
    case "$CFLAGS" in
        *-g* ) ;;
           * ) CFLAGS="$CFLAGS -g" ;;
    esac
    case "$CFLAGS" in
        *-pipe* ) ;;
              * ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CFLAGS="$CFLAGS -pipe") ;;
    esac
    AC_COMPILER_OPTION(ggdb3, -ggdb3, -ggdb3, CFLAGS="$CFLAGS -ggdb3")
    CFLAGS="$CFLAGS -pedantic"
    CFLAGS="$CFLAGS -Wall"
    WMORE="-Wshadow -Wpointer-arith -Wcast-align -Winline"
    WMORE="$WMORE -Wmissing-prototypes -Wmissing-declarations -Wnested-externs"
    AC_COMPILER_OPTION(wmore, -W<xxx>, $WMORE, CFLAGS="$CFLAGS $WMORE")
    AC_COMPILER_OPTION(wnolonglong, -Wno-long-long, -Wno-long-long, CFLAGS="$CFLAGS -Wno-long-long")
else
    case "$CFLAGS" in
        *-g* ) ;;
           * ) CFLAGS="$CFLAGS -g" ;;
    esac
fi
msg="enabled"
dnl AC_DEFINE(DEBUG)
],[
if test ".$ac_cv_prog_gcc" = ".yes"; then
case "$CFLAGS" in
    *-pipe* ) ;;
          * ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CFLAGS="$CFLAGS -pipe") ;;
esac
fi
case "$CFLAGS" in
    *-g* ) CFLAGS=`echo "$CFLAGS" |\
                   sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;;
esac
case "$CXXFLAGS" in
    *-g* ) CXXFLAGS=`echo "$CXXFLAGS" |\
                     sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;;
esac
msg=disabled
])dnl
AC_MSG_CHECKING(for compilation debug mode)
AC_MSG_RESULT([$msg])
if test ".$msg" = .enabled; then
    enable_shared=no
fi
])

define(AC_IFALLYES,[dnl
ac_rc=yes
for ac_spec in $1; do
    ac_type=`echo "$ac_spec" | sed -e 's/:.*$//'`
    ac_item=`echo "$ac_spec" | sed -e 's/^.*://'`
    case $ac_type in
        header [)]
            ac_item=`echo "$ac_item" | sed 'y%./+-%__p_%'`
            ac_var="ac_cv_header_$ac_item"
            ;;
        file [)]
            ac_item=`echo "$ac_item" | sed 'y%./+-%__p_%'`
            ac_var="ac_cv_file_$ac_item"
            ;;
        func    [)] ac_var="ac_cv_func_$ac_item"   ;;
        lib     [)] ac_var="ac_cv_lib_$ac_item"    ;;
        define  [)] ac_var="ac_cv_define_$ac_item" ;;
        typedef [)] ac_var="ac_cv_typedef_$ac_item" ;;
        custom  [)] ac_var="$ac_item" ;;
    esac
    eval "ac_val=\$$ac_var"
    if test ".$ac_val" != .yes; then
        ac_rc=no
        break
    fi
done
if test ".$ac_rc" = .yes; then
    :
    $2
else
    :
    $3
fi
])


dnl ##
dnl ##  Check for an external/extension library.
dnl ##  - is aware of <libname>-config style scripts
dnl ##  - searches under standard paths include, lib, etc.
dnl ##  - searches under subareas like .libs, etc.
dnl ##
dnl ##  configure.in:
dnl ##      AC_CHECK_EXTLIB(<realname>, <libname>, <func>, <header>,
dnl ##                      [<success-action> [, <fail-action>]])
dnl ##  Makefile.in:
dnl ##      CFLAGS  = @CFLAGS@
dnl ##      LDFLAGS = @LDFLAGS@
dnl ##      LIBS    = @LIBS@
dnl ##  shell:
dnl ##      $ ./configure --with-<libname>[=DIR]
dnl ##

AC_DEFUN(AC_CHECK_EXTLIB,[dnl
AC_ARG_WITH($2, [dnl
[  --with-]m4_substr([$2[[=DIR]]                     ], 0, 19)[build with external $1 library (default=no)]], [dnl
    if test ".$with_$2" = .yes; then
        #   via config script
        $2_version=`($2-config --version) 2>/dev/null`
        if test ".$$2_version" != .; then
            CPPFLAGS="$CPPFLAGS `$2-config --cflags`"
            CFLAGS="$CFLAGS `$2-config --cflags`"
            LDFLAGS="$LDFLAGS `$2-config --ldflags`"
        fi
    else
        if test -d "$with_$2"; then
            found=0
            #   via config script
            for dir in $with_$2/bin $with_$2; do
                if test -f "$dir/$2-config"; then
                    $2_version=`($dir/$2-config --version) 2>/dev/null`
                    if test ".$$2_version" != .; then
                        CPPFLAGS="$CPPFLAGS `$dir/$2-config --cflags`"
                        CFLAGS="$CFLAGS `$dir/$2-config --cflags`"
                        LDFLAGS="$LDFLAGS `$dir/$2-config --ldflags`"
                        found=1
                        break
                    fi
                fi
            done
            #   via standard paths
            if test ".$found" = .0; then
                for dir in $with_$2/include/$2 $with_$2/include $with_$2; do
                    if test -f "$dir/$4"; then
                        CPPFLAGS="$CPPFLAGS -I$dir"
                        CFLAGS="$CFLAGS -I$dir"
                        found=1
                        break
                    fi
                done
                for dir in $with_$2/lib/$2 $with_$2/lib $with_$2; do
                    if test -f "$dir/lib$2.a" -o -f "$dir/lib$2.so"; then
                        LDFLAGS="$LDFLAGS -L$dir"
                        found=1
                        break
                    fi
                done
            fi
            #   in any subarea
            if test ".$found" = .0; then
changequote(, )dnl
                for file in x `find $with_$2 -name "$4" -type f -print`; do
                    test .$file = .x && continue
                    dir=`echo $file | sed -e 's;[[^/]]*$;;' -e 's;\(.\)/$;\1;'`
                    CPPFLAGS="$CPPFLAGS -I$dir"
                    CFLAGS="$CFLAGS -I$dir"
                done
                for file in x `find $with_$2 -name "lib$2.[[aso]]" -type f -print`; do
                    test .$file = .x && continue
                    dir=`echo $file | sed -e 's;[[^/]]*$;;' -e 's;\(.\)/$;\1;'`
                    LDFLAGS="$LDFLAGS -L$dir"
                done
changequote([, ])dnl
            fi
        fi
    fi
    AC_HAVE_HEADERS($4)
    AC_CHECK_LIB($2, $3)
    AC_IFALLYES(header:$4 lib:$2_$3, with_$2=yes, with_$2=no)
    if test ".$with_$2" = .no; then
        AC_ERROR([Unable to find $1 library])
    fi
    ], [dnl
if test ".$with_$2" = .; then
    with_$2=no
fi
    ])dnl
AC_MSG_CHECKING(whether to build against external $1 library)
if test ".$with_$2" = .yes; then
    ifelse([$5], , :, [$5])
else
    ifelse([$6], , :, [$6])
fi
AC_MSG_RESULT([$with_$2])
])dnl