source: configure

#!/bin/sh

##############################
##  Configurer for BitlBee  ##
##                          ##
##  Copyright 2004 Lintux   ##
##  Copyright 2002 Lucumo   ##
##############################

# shellcheck disable=SC2016,SC2164,SC2181
prefix='/usr/local/'
bindir='$prefix/bin/'
sbindir='$prefix/sbin/'
etcdir='$prefix/etc/bitlbee/'
mandir='$prefix/share/man/'
datadir='$prefix/share/bitlbee/'
config='/var/lib/bitlbee/'
libdir='$prefix/lib/'
plugindir='$prefix/lib/bitlbee/'
includedir='$prefix/include/bitlbee/'
systemdsystemunitdir=''
sysusersdir=''
libevent='/usr/'
pidfile='/var/run/bitlbee.pid'
ipcsocket=''
pcdir='$prefix/lib/pkgconfig'
systemlibdirs="/lib64 /usr/lib64 /usr/local/lib64 /lib /usr/lib /usr/local/lib"
sysroot=''

configure_args="$*"

# Set these to default-on to let it be overriden by either the user or purple
#
# If the user sets one of these to 1, purple won't disable them.
# Otherwise, if it's still default-on, it gets included in normal builds,
# but not purple ones.
jabber="default-on"

twitter=1
purple=0

verbose=0
doc=1
debug=0
strip=0
gcov=0
asan=0
plugins=1
otr=0

events=glib
external_json_parser=auto
ssl=auto

pam=0
ldap=0

pie=1

systemd=auto

arch=$(uname -s)
arch_rel=$(uname -r)

GLIB_MIN_VERSION=2.32

# Cygwin, Darwin and SunOS < 5.11 do not support PIC/PIE
case "$arch" in
        CYGWIN* )
                pie=0;;
        Darwin )
                pie=0;;
        SunOS )
                if [ "$arch_rel" = "5.10" ]; then
                        pie=0
                fi
                ;;
esac

get_version() {
        REAL_BITLBEE_VERSION=$(grep '^#define BITLBEE_VERSION ' "$srcdir/bitlbee.h" | sed 's/.*\"\(.*\)\".*/\1/')

        if [ -n "$BITLBEE_VERSION" ]; then
                # environment variable already set to something to spoof it
                # don't replace it with the git stuff
                return
        fi

        BITLBEE_VERSION=$REAL_BITLBEE_VERSION

        if [ -d "$srcdir/.git" ] && type git > /dev/null 2> /dev/null; then
                timestamp=$(cd "$srcdir"; git show -s --format=%ci HEAD | sed 's/ .*$//; s/-//g')
                branch=$(cd "$srcdir"; git rev-parse --abbrev-ref HEAD)

                search='\(.*\)-\([0-9]*\)-\(g[0-9a-f]*\)'
                replace="\1+$timestamp+$branch+\2-\3-git"

                if ! (cd "$srcdir"; git describe --long --tags 2>/dev/null); then
                        describe=${REAL_BITLBEE_VERSION}-0-g$(cd "$srcdir"; git rev-parse --short HEAD)
                fi

                BITLBEE_VERSION=$(echo "$describe" | sed "s#$search#$replace#")

                unset timestamp branch search replace describe
        fi
}

if [ "$1" = "--dump-version" ]; then
        srcdir=$(cd "$(dirname "$0")"; pwd)
        get_version
        echo "$BITLBEE_VERSION"
        exit
fi

echo BitlBee configure

while [ -n "$1" ]; do
        e="$(expr "X$1" : 'X--\(.*=.*\)')"
        if [ -z "$e" ]; then
                cat<<EOF

Usage: $0 [OPTIONS]

Option          Description                             Default

--prefix=...    Directories to put files in             $prefix
--bindir=...                                            $bindir
--sbindir=...                                           $sbindir
--etcdir=...                                            $etcdir
--mandir=...                                            $mandir
--datadir=...                                           $datadir
--plugindir=...                                         $plugindir
--systemdsystemunitdir=...                              $systemdsystemunitdir
--sysusersdir=...                                       $sysusersdir
--pidfile=...                                           $pidfile
--config=...                                            $config

--verbose=0/1   Disable/enable verbose build            $verbose

--jabber=0/1    Disable/enable Jabber part              $jabber
--twitter=0/1   Disable/enable Twitter part             $twitter

--purple=0/1    Disable/enable libpurple support        $purple
                (automatically disables other protocol modules)

--pam=0/1       Disable/enable PAM authentication       $pam
--ldap=0/1      Disable/enable LDAP authentication      $ldap

--doc=0/1       Disable/enable help.txt generation      $doc
--debug=0/1     Disable/enable debugging                $debug
--strip=0/1     Disable/enable binary stripping         $strip
--pie=0/1       Build position independent executable   $pie
--gcov=0/1      Disable/enable test coverage reporting  $gcov
--asan=0/1      Disable/enable AddressSanitizer         $asan
--plugins=0/1   Disable/enable plugins support          $plugins
--otr=0/1/auto/plugin
                Disable/enable OTR encryption support   $otr

--events=...    Event handler (glib, libevent)          $events
--ssl=...       SSL library to use (gnutls, nss, openssl, auto)
                                                        $ssl
--external_json_parser=0/1/auto Use External JSON parser $external_json_parser
--systemd=0/1   Enable/disable systemd                  $systemd


--target=...    Cross compilation target                same as host
--sysroot=...   Cross compilation sysroot               $sysroot
EOF
                exit
        fi
        eval "$e"
        shift
done

# Expand $prefix and get rid of double slashes
bindir=$(eval echo "$bindir/" | sed 's/\/\{1,\}/\//g')
sbindir=$(eval echo "$sbindir/" | sed 's/\/\{1,\}/\//g')
etcdir=$(eval echo "$etcdir/" | sed 's/\/\{1,\}/\//g')
mandir=$(eval echo "$mandir/" | sed 's/\/\{1,\}/\//g')
datadir=$(eval echo "$datadir/" | sed 's/\/\{1,\}/\//g')
config=$(eval echo "$config/" | sed 's/\/\{1,\}/\//g')
libdir=$(eval echo "$libdir/" | sed 's/\/\{1,\}/\//g')
plugindir=$(eval echo "$plugindir/" | sed 's/\/\{1,\}/\//g')
includedir=$(eval echo "$includedir"/ | sed 's/\/\{1,\}/\//g')
libevent=$(eval echo "$libevent"/ | sed 's/\/\{1,\}/\//g')

pidfile=$(eval echo "$pidfile" | sed 's/\/\{1,\}/\//g')
ipcsocket=$(eval echo "$ipcsocket" | sed 's/\/\{1,\}/\//g')
pcdir=$(eval echo "$pcdir" | sed 's/\/\{1,\}/\//g')

protocols_mods=""

cat <<EOF >Makefile.settings
## BitlBee settings, generated by configure

# ./configure $configure_args

PREFIX=$prefix
BINDIR=$bindir
SBINDIR=$sbindir
ETCDIR=$etcdir
MANDIR=$mandir
DATADIR=$datadir
PLUGINDIR=$plugindir
CONFIG=$config
LIBDIR=$libdir
INCLUDEDIR=$includedir
PCDIR=$pcdir

TARGET=$target

INSTALL=install -p

DESTDIR=
LFLAGS=
EFLAGS=-lm
EOF

srcdir=$(cd "$(dirname "$0")"; pwd)
currdir=$(pwd)
if [ "$srcdir" != "$currdir" ]; then
        echo
        echo "configure script run from a different directory. Will create some symlinks..."
        if [ ! -e Makefile ] || [ -L Makefile ]; then
                COPYDIRS="doc lib protocols tests utils"
                # shellcheck disable=SC2046,SC2086
                mkdir -p $(cd "$srcdir"; find $COPYDIRS -type d)
                find . -name Makefile -type l -print0 | xargs -0 rm 2> /dev/null
                dst="$PWD"
                cd "$srcdir"
                # shellcheck disable=SC2044
                for i in $(find . -name Makefile -type f); do
                        ln -s "$PWD${i#.}" "$dst/$i"
                done
                cd "$dst"
                rm -rf .bzr
        fi
        
        echo "_SRCDIR_=$srcdir/" >> Makefile.settings
        CFLAGS="$CFLAGS -I${dst}"
else
        srcdir=$PWD
fi

cat<<EOF >config.h
/* BitlBee settings, generated by configure

   Do *NOT* use any of these defines in your code without thinking twice, most
   of them can/will be overridden at run-time */

#define BITLBEE_CONFIGURE_ARGS "$configure_args"

#define CONFIG "$config"
#define ETCDIR "$etcdir"
#define VARDIR "$datadir"
#define PLUGINDIR "$plugindir"
#define DATADIR "$datadir"
#define PIDFILE "$pidfile"
#define IPCSOCKET "$ipcsocket"
EOF



if [ -n "$target" ]; then
        # prepend sysroot to system lib dirs

        systemlibdirs_cross=''
        for i in $systemlibdirs; do
                systemlibdirs_cross="$systemlibdirs_cross $sysroot$i"
        done
        systemlibdirs=$systemlibdirs_cross
        unset systemlibdirs_cross

        # backward compatibility

        if [ -z "$PKG_CONFIG_LIBDIR" ]; then
                PKG_CONFIG_LIBDIR="/usr/$target/lib/pkgconfig"
                export PKG_CONFIG_LIBDIR
        fi

        if [ -d "/usr/$target/bin" ]; then
                PATH="/usr/$target/bin:$PATH"
        fi

        if [ -d "/usr/$target/lib" ]; then
                systemlibdirs="$systemlibdirs /usr/$target/lib"
        fi

        CC=$target-cc
        LD=$target-ld
        STRIP=$target-strip
fi

if [ "$asan" = "1" ]; then
        CFLAGS="$CFLAGS -fsanitize=address"
        LDFLAGS="$LDFLAGS -fsanitize=address"
        debug=1
fi

if [ "$verbose" = "0" ]; then
        echo 'VERBOSE=@' >> Makefile.settings
else
        echo 'VERBOSE=' >> Makefile.settings
fi

cat <<EOF >>Makefile.settings

# Enable/disable output verbosity
ifdef V
ifeq (\$(V),1)
        VERBOSE=
else
        VERBOSE=@
endif
endif

EOF

if [ "$debug" = "1" ]; then
        echo 'DEBUG=1' >> Makefile.settings
        CFLAGS="$CFLAGS -g3 -DDEBUG -O0"
else
        [ -z "$CFLAGS" ] && CFLAGS="-g -O2"
fi

if [ "$pie" = "1" ]; then
        echo 'CFLAGS_BITLBEE=-fPIE' >> Makefile.settings
        echo 'LDFLAGS_BITLBEE=-pie' >> Makefile.settings
fi

cat<<EOF >>Makefile.settings
LDFLAGS=$LDFLAGS
CFLAGS=$CFLAGS $CPPFLAGS
CFLAGS+=-DHAVE_CONFIG_H -D_GNU_SOURCE
EOF

if [ -n "$CC" ]; then
        :
elif type gcc > /dev/null 2> /dev/null; then
        CC=gcc
elif type cc > /dev/null 2> /dev/null; then
        CC=cc
else
        echo 'Cannot find a C compiler, aborting.'
        exit 1
fi

echo "CC=$CC" >> Makefile.settings
if echo "$CC" | grep -qw 'gcc\|clang'; then
        # Apparently -Wall is gcc-specific?
        echo 'CFLAGS+=-Wall -Wformat -Werror=format-security' >> Makefile.settings
fi

if [ -z "$LD" ]; then
        if type ld > /dev/null 2> /dev/null; then
                LD=ld
        else
                echo 'Cannot find ld, aborting.'
                exit 1
        fi
fi

echo "LD=$LD" >> Makefile.settings

if [ -z "$PKG_CONFIG" ]; then
        PKG_CONFIG=pkg-config
fi

if ! $PKG_CONFIG --version > /dev/null 2>/dev/null; then
        echo
        echo 'Cannot find pkg-config, aborting.'
        exit 1
fi

if $PKG_CONFIG glib-2.0; then
        if $PKG_CONFIG glib-2.0 --atleast-version=$GLIB_MIN_VERSION; then
                cat<<EOF >>Makefile.settings
EFLAGS+=$($PKG_CONFIG --libs glib-2.0 gmodule-2.0)
CFLAGS+=$($PKG_CONFIG --cflags glib-2.0 gmodule-2.0)
EOF
        else
                echo
                echo "Found glib2 $($PKG_CONFIG glib-2.0 --modversion), but version $GLIB_MIN_VERSION or newer is required."
                exit 1
        fi
else
        echo
        echo 'Cannot find glib2 development libraries, aborting. (Install libglib2-dev?)'
        exit 1
fi

if [ "$events" = "libevent" ]; then
        if ! [ -f "${libevent}include/event.h" ]; then
                echo
                echo 'Warning: Could not find event.h, you might have to install it and/or specify'
                echo 'its location using the --libevent= argument. (Example: If event.h is in'
                echo '/usr/local/include and binaries are in /usr/local/lib: --libevent=/usr/local)'
        fi
        
        echo '#define EVENTS_LIBEVENT' >> config.h
        cat <<EOF >>Makefile.settings
EFLAGS+=-levent -L${libevent}lib
CFLAGS+=-I${libevent}include
EOF
elif [ "$events" = "glib" ]; then
        ## We already use glib anyway, so this is all we need (and in fact not even this, but just to be sure...):
        echo '#define EVENTS_GLIB' >> config.h
else
        echo
        echo 'ERROR: Unknown event handler specified.'
        exit 1
fi
echo 'EVENT_HANDLER=events_'$events'.o' >> Makefile.settings

if [ "$external_json_parser" = "auto" ]; then
        if pkg-config --exists json-parser; then
                external_json_parser=1
        else
                external_json_parser=0
        fi
fi
echo "EXTERNAL_JSON_PARSER=$external_json_parser" >> Makefile.settings
if [ "$external_json_parser" = "1" ]; then
        cat <<EOF >>Makefile.settings
CFLAGS+=$(pkg-config --cflags json-parser)
CFLAGS+=-DUSE_EXTERNAL_JSON_PARSER
LDFLAGS_BITLBEE+=$(pkg-config --libs json-parser)
LDFLAGS_TESTS+=$(pkg-config --libs json-parser)
EOF
fi

echo CFLAGS+=-I"${srcdir}" -I"${srcdir}"/lib -I"${srcdir}"/protocols -I. >> Makefile.settings

detect_gnutls()
{
        if $PKG_CONFIG --exists gnutls; then
                cat <<EOF >>Makefile.settings
EFLAGS+=$($PKG_CONFIG --libs gnutls) $(pkg-config --libs libgcrypt)
CFLAGS+=$($PKG_CONFIG --cflags gnutls) $(pkg-config --cflags libgcrypt)
EOF
                ssl=gnutls
                if ! $PKG_CONFIG gnutls --atleast-version=2.8; then
                        echo
                        echo 'Warning: With GnuTLS versions <2.8, certificate expire dates are not verified.'
                fi
                ret=1
        elif libgnutls-config --version > /dev/null 2> /dev/null; then
                cat <<EOF >>Makefile.settings
EFLAGS+=$(libgnutls-config --libs) $(pkg-config --libs libgcrypt)
CFLAGS+=$(libgnutls-config --cflags) $(pkg-config --cflags libgcrypt)
EOF
                
                ssl=gnutls
                ret=1
        else
                ret=0
        fi
}

detect_nss()
{
        if $PKG_CONFIG --version > /dev/null 2>/dev/null && $PKG_CONFIG nss; then
                cat<<EOF >>Makefile.settings
EFLAGS+=$($PKG_CONFIG --libs nss)
CFLAGS+=$($PKG_CONFIG --cflags nss)
EOF
                
                ssl=nss
                ret=1
        else
                ret=0
        fi
}

RESOLV_TESTCODE='
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>

int main()
{

        res_query( NULL, 0, 0, NULL, 0);
        dn_expand( NULL, NULL, NULL, NULL, 0);
        dn_skipname( NULL, NULL);
}
'
RESOLV_NS_TESTCODE='
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>

int main()
{
        ns_initparse( NULL, 0, NULL );
        ns_parserr( NULL, ns_s_an, 0, NULL );
}
'
RESOLV_NS_TYPES_TESTCODE='
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>

int main()
{
        ns_msg nsh;
        ns_rr rr;

        /* Not all platforms we want to work on have
         ns_* routines, so use this to make sure
         the compiler uses it.*/
        return (int)(sizeof(nsh) + sizeof(rr));
}
'

BACKTRACE_TESTCODE='
#include <execinfo.h>

int main()
{
        void *trace[16];
        return backtrace(trace, 16);
}
'

detect_resolv_dynamic()
{
        case "$arch" in
        OpenBSD )
                # In FreeBSD res_*/dn_* routines are present in libc.so
                LIBRESOLV=;;
        FreeBSD )
                # In FreeBSD res_*/dn_* routines are present in libc.so
                LIBRESOLV=;;
        CYGWIN* )
                # In Cygwin res_*/dn_* routines are present in libc.so
                LIBRESOLV=;;
        * )
                LIBRESOLV=-lresolv;;
        esac
        TMPFILE=$(mktemp /tmp/bitlbee-configure.XXXXXX)
        ret=1
        echo "$RESOLV_TESTCODE" | $CC -o "$TMPFILE" -x c - $LIBRESOLV >/dev/null 2>/dev/null
        if [ "$?" = "0" ]; then
                echo "EFLAGS+=$LIBRESOLV" >> Makefile.settings
                ret=0
        fi

        rm -f "$TMPFILE"
        return $ret
}

detect_resolv_static()
{
        TMPFILE=$(mktemp /tmp/bitlbee-configure.XXXXXX)
        ret=1
        for i in $systemlibdirs; do
                if [ -f "$i/libresolv.a" ]; then
                        echo "$RESOLV_TESTCODE" | $CC -o "$TMPFILE" -x c - -Wl,"$i/libresolv.a" >/dev/null 2>/dev/null
                        if [ "$?" = "0" ]; then
                                echo "EFLAGS+=$i/libresolv.a" >> Makefile.settings
                                ret=0
                        fi
                fi
        done

        rm -f "$TMPFILE"
        return $ret
}

detect_resolv_ns_dynamic()
{
        case "$arch" in
        FreeBSD )
                # In FreeBSD ns_ routines are present in libc.so
                LIBRESOLV=;;
        * )
                LIBRESOLV=-lresolv;;
        esac
        TMPFILE=$(mktemp /tmp/bitlbee-configure.XXXXXX)
        ret=1
        echo "$RESOLV_NS_TESTCODE" | $CC -o "$TMPFILE" -x c - $LIBRESOLV >/dev/null 2>/dev/null
        if [ "$?" = "0" ]; then
                ret=0
        fi

        rm -f "$TMPFILE"
        return $ret
}

detect_resolv_ns_static()
{
        TMPFILE=$(mktemp /tmp/bitlbee-configure.XXXXXX)
        ret=1
        for i in $systemlibdirs; do
                if [ -f "$i/libresolv.a" ]; then
                        echo "$RESOLV_NS_TESTCODE" | $CC -o "$TMPFILE" -x c - -Wl,"$i/libresolv.a" >/dev/null 2>/dev/null
                        if [ "$?" = "0" ]; then
                                ret=0
                        fi
                fi
        done

        rm -f "$TMPFILE"
        return $ret
}

detect_nameser_has_ns_types()
{
        TMPFILE=$(mktemp /tmp/bitlbee-configure.XXXXXX)
        ret=1
        # since we aren't actually linking with ns_* routines
        # we can just compile the test code
        echo "$RESOLV_NS_TYPES_TESTCODE" | $CC -o "$TMPFILE" -x c - >/dev/null 2>/dev/null
        if [ "$?" = "0" ]; then
                ret=0
        fi

        rm -f "$TMPFILE"
        return $ret
}

detect_backtrace()
{
        TMPFILE=$(mktemp /tmp/bitlbee-configure.XXXXXX)
        ret=1
        echo "$BACKTRACE_TESTCODE" | $CC -o "$TMPFILE" -x c - >/dev/null 2>/dev/null
        if [ "$?" = "0" ]; then
                ret=0
        fi

        rm -f "$TMPFILE"
        return $ret
}

if [ "$ssl" = "auto" ]; then
        detect_gnutls
        if [ "$ret" = "0" ]; then
                # Disable NSS for now as it's known to not work very well ATM.
                #detect_nss
                :
        fi
elif [ "$ssl" = "gnutls" ]; then
        detect_gnutls
elif [ "$ssl" = "nss" ]; then
        detect_nss
elif [ "$ssl" = "openssl" ]; then
        echo
        echo 'No detection code exists for OpenSSL. Make sure that you have a complete'
        echo 'installation of OpenSSL (including devel/header files) before reporting'
        echo 'compilation problems.'
        echo
        echo 'Also, keep in mind that the OpenSSL is, according to some people, not'
        echo 'completely GPL-compatible. Using GnuTLS is recommended and better supported'
        echo 'by us. However, on many BSD machines, OpenSSL can be considered part of the'
        echo 'operating system, which makes it GPL-compatible.'
        echo
        echo 'For more info, see: http://www.openssl.org/support/faq.html#LEGAL2'
        echo '                    http://www.gnome.org/~markmc/openssl-and-the-gpl.html'
        echo
        echo 'Please note that distributing a BitlBee binary which links to OpenSSL is'
        echo 'probably illegal. If you want to create and distribute a binary BitlBee'
        echo 'package, you really should use GnuTLS instead.'
        echo
        echo 'Also, the OpenSSL license requires us to say this:'
        echo ' *    "This product includes software developed by the OpenSSL Project'
        echo ' *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"'
        
        echo 'EFLAGS+=-lssl -lcrypto' >> Makefile.settings
        
        ret=1
else
        echo
        echo 'ERROR: Unknown SSL library specified.'
        exit 1
fi

if [ "$ret" = "0" ]; then
        echo
        echo 'ERROR: Could not find a suitable SSL library (GnuTLS, libnss or OpenSSL).'
        echo '       Please note that this script doesn'\''t have detection code for OpenSSL,'
        echo '       so if you want to use that, you have to select it by hand.'
        
        exit 1
fi

echo 'SSL_CLIENT=ssl_'$ssl'.o' >> Makefile.settings

if detect_nameser_has_ns_types; then
        echo '#define NAMESER_HAS_NS_TYPES' >> config.h
fi
if detect_resolv_dynamic || detect_resolv_static; then
        echo '#define HAVE_RESOLV_A' >> config.h
        if detect_resolv_ns_dynamic || detect_resolv_ns_static; then
                echo '#define HAVE_RESOLV_A_WITH_NS' >> config.h
        fi
else
        echo 'Insufficient resolv routines. Jabber server must be set explicitly'
fi

if detect_backtrace; then
        echo '#define HAVE_BACKTRACE' >> config.h
        echo '#define CRASHFILE "'"$config"'crash.log"' >> config.h
fi

STORAGES="xml"

for i in $STORAGES; do
        STORAGE_OBJS="$STORAGE_OBJS storage_$i.o"
done
echo "STORAGE_OBJS=$STORAGE_OBJS" >> Makefile.settings

authobjs=
authlibs=
if [ "$pam" = 0 ]; then
        echo '#undef WITH_PAM' >> config.h
else
        if ! echo '#include <security/pam_appl.h>' | $CC -E - >/dev/null 2>/dev/null; then
                echo 'Cannot find libpam development libraries, aborting. (Install libpam0g-dev?)'
                exit 1
        fi
        echo '#define WITH_PAM' >> config.h
        authobjs="${authobjs}auth_pam.o "
        authlibs="${authlibs}-lpam "
fi
if [ "$ldap" = 0 ]; then
        echo '#undef WITH_LDAP' >> config.h
else
        if ! echo '#include <ldap.h>' | $CC -E - >/dev/null 2>/dev/null; then
                echo 'Cannot find libldap development libraries, aborting. (Install libldap2-dev?)'
                exit 1
        fi
        echo '#define WITH_LDAP' >> config.h
        authobjs="${authobjs}auth_ldap.o "
        authlibs="${authlibs}-lldap "
fi
echo "AUTH_OBJS=$authobjs" >> Makefile.settings
echo "EFLAGS+=$authlibs" >> Makefile.settings

if [ "$strip" = 0 ]; then
        echo "STRIP=\# skip strip" >> Makefile.settings
else
        if [ "$debug" = 1 ]; then
                echo
                echo 'Stripping binaries does not make sense when debugging. Stripping disabled.'
                echo 'STRIP=\# skip strip' >> Makefile.settings
                strip=0
        elif [ -n "$STRIP" ]; then
                echo "STRIP=$STRIP" >> Makefile.settings
        elif type strip > /dev/null 2> /dev/null; then
                echo "STRIP=strip" >> Makefile.settings
        else
                echo
                echo 'No strip utility found, cannot remove unnecessary parts from executable.'
                echo 'STRIP=\# skip strip' >> Makefile.settings
                strip=0
        fi
fi

if [ ! "$systemd" = "0" ]; then
        if ! $PKG_CONFIG --exists systemd; then
                if [ "$systemd" = "1" ]; then
                        echo "systemd requested but not found"
                        exit 1
                else
                        systemd=0
                fi
        elif [ "$systemd" = "auto" ]; then
                systemd=1
        fi
fi

pkgconf_systemd_var() {
        # First try deprecated variable, use newer variable if not found
        if $PKG_CONFIG --print-variables systemd | grep -q "$1"; then
                $PKG_CONFIG --variable="$1" systemd
        else
                $PKG_CONFIG --variable="$2" systemd
        fi
}

if [ "$systemd" = "1" ]; then
        if [ -z "$systemdsystemunitdir" ]; then
                systemdsystemunitdir=$(pkgconf_systemd_var systemdsystemunitdir systemd_system_unit_dir)
        fi
        if [ -z "$sysusersdir" ]; then
                sysusersdir=$(pkgconf_systemd_var sysusersdir sysusers_dir)
        fi
fi

if [ -n "$systemdsystemunitdir" ]; then
        echo "SYSTEMDSYSTEMUNITDIR=$systemdsystemunitdir" >> Makefile.settings
fi
if [ -n "$sysusersdir" ]; then
        echo "SYSUSERSDIR=$sysusersdir" >> Makefile.settings
fi

if [ "$gcov" = "1" ]; then
        echo "CFLAGS+=--coverage" >> Makefile.settings
        echo "EFLAGS+=--coverage" >> Makefile.settings
fi

if [ "$plugins" = 0 ]; then
        plugindir=""
        echo '#undef WITH_PLUGINS' >> config.h
else
        echo '#define WITH_PLUGINS' >> config.h
fi

if [ "$otr" = "auto" ]; then
        ! $PKG_CONFIG --exists libotr
        otr=$?
fi

if [ "$otr" != 0 ] && ! $PKG_CONFIG --atleast-version=4.0 --print-errors libotr; then
        exit 1
fi

if [ "$otr" = 1 ]; then
        # BI == built-in
        echo '#define OTR_BI' >> config.h
        cat <<EOF >>Makefile.settings
EFLAGS+=$($PKG_CONFIG --libs libotr) $(pkg-config --libs libgcrypt)
CFLAGS+=$($PKG_CONFIG --cflags libotr) $(pkg-config --cflags libgcrypt)
OTR_BI=otr.o
EOF
elif [ "$otr" = "plugin" ]; then
        # for some mysterious reason beyond the comprehension of my mortal mind,
        # the libgcrypt flags aren't needed when building as plugin. add them anyway.
        echo '#define OTR_PI' >> config.h
        cat <<EOF >>Makefile.settings
OTRFLAGS=$($PKG_CONFIG --libs libotr) $(pkg-config --libs libgcrypt)
CFLAGS+=$($PKG_CONFIG --cflags libotr) $(pkg-config --cflags libgcrypt)
OTR_PI=otr.so
EOF
fi

if [ -z "$PYTHON" ]; then
        for pp in python python3 python2; do
                if command -v $pp > /dev/null; then
                        PYTHON=$pp
                        break
                fi
        done
fi

if [ "$doc" = "1" ]; then
        # check this here just in case someone tries to install it in python2.4...
        if [ ! -e "$srcdir/doc/user-guide/help.txt" ] && ! $PYTHON -m xml.etree.ElementTree > /dev/null 2>&1; then
                echo
                echo 'ERROR: Python (>=2.5 or 3.x) is required to generate docs'
                echo "(Use the PYTHON environment variable if it's in a weird location)"
                exit 1
        fi
        echo "DOC=1" >> Makefile.settings
        echo "PYTHON=$PYTHON" >> Makefile.settings
fi

get_version

if [ ! "$BITLBEE_VERSION" = "$REAL_BITLBEE_VERSION" ]; then
        echo "Spoofing version number: $BITLBEE_VERSION"
        echo "#undef BITLBEE_VERSION" >> config.h
        echo '#define BITLBEE_VERSION "'"$BITLBEE_VERSION"'"' >> config.h
        echo
fi

if ! make helloworld > /dev/null 2>&1; then
        echo "WARNING: Your version of make (BSD make?) does not support BitlBee's makefiles."
        echo "BitlBee needs GNU make to build properly. On most systems GNU make is available"
        echo "under the name 'gmake'."
        echo
        if gmake helloworld > /dev/null 2>&1; then
                echo "gmake seems to be available on your machine, great."
                echo
        else
                echo "gmake is not installed (or not working). Please try to install it."
                echo
        fi
fi

pkgconfiglibs=''
case "$arch" in
CYGWIN* )
        # shellcheck disable=SC2016
        pkgconfiglibs='-L${libdir} -lbitlbee -no-undefined'
esac

pkgconfigrequires='glib-2.0'
if [ "$external_json_parser" = '1' ]; then
        pkgconfigrequires="$pkgconfigrequires json-parser"
fi

cat <<EOF >bitlbee.pc
prefix=$prefix
includedir=$includedir
plugindir=$plugindir
libdir=$libdir
datadir=$datadir

Name: bitlbee
Description: IRC to IM gateway
Requires: $pkgconfigrequires
Version: $BITLBEE_VERSION
Libs: $pkgconfiglibs
Cflags: -I\${includedir}

EOF

protocols=''
protoobjs=''

if [ "$purple" = 0 ]; then
        echo '#undef WITH_PURPLE' >> config.h
else
        if ! $PKG_CONFIG purple; then
                echo
                echo 'Cannot find libpurple development libraries, aborting. (Install libpurple-dev?)'
                exit 1
        fi
        echo '#define WITH_PURPLE' >> config.h
        cat<<EOF >>Makefile.settings
EFLAGS+=$($PKG_CONFIG purple --libs)
PURPLE_CFLAGS+=$($PKG_CONFIG purple --cflags)
EOF
        protocols=$protocols'purple '
        protoobjs=$protoobjs'purple_mod.o '

        # only disable these if the user didn't enable them explicitly
        [ "$jabber" = "default-on" ] && jabber=0

        echo '#undef PACKAGE' >> config.h
        echo '#define PACKAGE "BitlBee-LIBPURPLE"' >> config.h
        
        if [ "$events" = "libevent" ]; then
                echo 'Warning: Some libpurple modules (including msn-pecan) do their event handling'
                echo 'outside libpurple, talking to GLib directly. At least for now the combination'
                echo 'libpurple + libevent is *not* recommended!'
                echo
        fi
fi

case "$CC" in
*gcc* )
        echo "CFLAGS+=-MMD -MF .depend/\$@.d" >> Makefile.settings
        for i in . lib tests protocols protocols/*/; do
                mkdir -p "$i/.depend"
        done
esac

if [ "$jabber" = 0 ]; then
        echo '#undef WITH_JABBER' >> config.h
else
        echo '#define WITH_JABBER' >> config.h
        protocols=$protocols'jabber '
        protoobjs=$protoobjs'jabber_mod.o '
fi

if [ "$twitter" = 0 ]; then
        echo '#undef WITH_TWITTER' >> config.h
else
        echo '#define WITH_TWITTER' >> config.h
        protocols=$protocols'twitter '
        protoobjs=$protoobjs'twitter_mod.o '
fi

if [ "$protocols" = "PROTOCOLS = " ]; then
        echo "Warning: You haven't selected any communication protocol to compile!"
        echo "         BitlBee will run, but you will be unable to connect to IM servers!"
fi

echo "PROTOCOLS = $protocols" >> Makefile.settings
echo "PROTOOBJS = $protoobjs" >> Makefile.settings

echo "Architecture: $arch"
case "$arch" in
Linux )
;;
GNU/* )
;;
*BSD )
;;
Darwin )
        echo 'STRIP=\# skip strip' >> Makefile.settings
;;
IRIX )
;;
SunOS )
        echo 'EFLAGS+=-lresolv -lnsl -lsocket' >> Makefile.settings
        echo 'STRIP=\# skip strip' >> Makefile.settings
        echo '#define NO_FD_PASSING' >> config.h
        if [ "$arch_rel" = "5.10" ]; then
                echo '#define NO_STRCASESTR' >> config.h
        fi
;;
AIX )
        echo 'EFLAGS+=-Wl,-brtl' >> Makefile.settings
;;
CYGWIN* )
        echo 'EFLAGS+=-Wl,--export-all,--out-implib,libbitlbee.dll.a' >> Makefile.settings
        echo 'IMPLIB=libbitlbee.dll.a' >> Makefile.settings
;;
Windows )
        echo 'Native windows compilation is not supported anymore, use cygwin instead.'
;;
* )
        echo 'We haven'\''t tested BitlBee on many platforms yet, yours is untested. YMMV.'
        echo 'Please report any problems at https://bugs.bitlbee.org/.'
;;
esac

if [ -n "$target" ]; then
        echo "Cross-compiling for: $target"
fi

echo
echo 'Configuration done:'

if [ "$debug" = "1" ]; then
        echo '  Debugging enabled.'
else
        echo '  Debugging disabled.'
fi

if [ "$asan" = "1" ]; then
        echo '  AddressSanitizer (ASAN) enabled.'
else
        echo '  AddressSanitizer (ASAN) disabled.'
fi

if [ "$pie" = "1" ]; then
        echo '  Building PIE executable'
else
        echo '  Building non-PIE executable'
fi

if [ "$strip" = "1" ]; then
        echo '  Binary stripping enabled.'
else
        echo '  Binary stripping disabled.'
fi

if [ "$otr" = "1" ]; then
        echo '  Off-the-Record (OTR) Messaging enabled.'
elif [ "$otr" = "plugin" ]; then
        echo '  Off-the-Record (OTR) Messaging enabled (as a plugin).'
else
        echo '  Off-the-Record (OTR) Messaging disabled.'
fi

if [ "$systemd" = "1" ]; then
        echo '  systemd enabled.'
else
        echo '  systemd disabled.'
fi

echo "  Using python: $PYTHON"

if [ "$external_json_parser" = "1" ]; then
        echo '  Using system JSON parser.'
else
        echo '  Using bundled JSON parser.'
fi

echo "  Using event handler: $events"
echo "  Using SSL library: $ssl"
#echo '  Building with these storage backends: '$STORAGES

if [ -n "$protocols" ]; then
        echo "  Building with these protocols: $protocols$protocols_mods"
        case "$protocols" in
        *purple*)
                echo "    Note that BitlBee-libpurple is supported on a best-effort basis. It's"
                echo "    not *fully* compatible with normal BitlBee. Don't use it unless you"
                echo "    absolutely need it (i.e. support for a certain protocol or feature)."
        esac
else
        echo '  Building without IM-protocol support. We wish you a lot of fun...'
fi