#
# $Id: x11.subr,v 1.11 2003/09/26 17:03:32 jmmv Exp $
# bt_config module: x11 detection
#
# buildtool
# Copyright (c) 2003 Julio M. Merino Vidal
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
# 3. Neither the name of the author nor the names of contributors may
#    be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#

x11_feature() {
    bt_feature X11 auto \
        "Whether X11 support is wanted or not (yes, no, auto)."
}

x11_check() {
    local d found idirs ldirs

    if [ ${BT_FEATURE_X11:-unset} = no ]; then
        echo "X11 support disabled as requested"
        bt_msg_summary 'X11 support: no'
        return 0
    fi

    idirs="${X11_DIR_INCLUDE}"
    idirs+="/usr/X11/include /usr/X11R6/include /usr/X11R5/include"
    idirs+="/usr/X11R4/include /usr/include/X11 /usr/include/X11R6"
    idirs+="/usr/include/X11R5 /usr/include/X11R4"
    idirs+="/usr/local/X11/include /usr/local/X11R6/include"
    idirs+="/usr/local/X11R5/include /usr/local/X11R4/include"
    idirs+="/usr/local/include/X11 /usr/local/include/X11R6"
    idirs+="/usr/local/include/X11R5 /usr/local/include/X11R4"
    idirs+="/usr/X386/include /usr/x386/include"
    idirs+="/usr/XFree86/include/X11 /usr/include /usr/local/include"
    idirs+="/usr/unsupported/include /usr/athena/include"
    idirs+="/usr/local/x11r5/include /usr/lpp/Xamples/include"
    idirs+="/usr/openwin/include /usr/openwin/share/include"

    bt_msg_chk "for X11 headers"
    found=no
    for d in ${idirs}; do
        if [ -f "${d}/X11/Intrinsic.h" ]; then
            X11_FLAGS_CPP+=-I${d}
            bt_subst X11_FLAGS_CPP
            bt_msg_result ${d}
            found=yes
            break
        fi
    done
    if [ ${found} = no ]; then
        bt_msg_result "not found."
        [ ${BT_FEATURE_X11:-unset} = yes ] && x11_failure
        bt_msg_summary 'X11 support: no'
        return 1
    fi

    ldirs="${X11_DIR_LIB} $(echo ${d} | sed s/include/lib/)"
    ldirs+="/usr/X11/lib /usr/X11R6/lib /usr/X11R5/lib"
    ldirs+="/usr/X11R4/lib /usr/lib/X11 /usr/lib/X11R6"
    ldirs+="/usr/lib/X11R5 /usr/lib/X11R4"
    ldirs+="/usr/local/X11/lib /usr/local/X11R6/lib"
    ldirs+="/usr/local/X11R5/lib /usr/local/X11R4/lib"
    ldirs+="/usr/local/lib/X11 /usr/local/lib/X11R6"
    ldirs+="/usr/local/lib/X11R5 /usr/local/lib/X11R4"
    ldirs+="/usr/X386/lib /usr/x386/lib"
    ldirs+="/usr/XFree86/lib/X11 /usr/lib /usr/local/lib"
    ldirs+="/usr/unsupported/lib /usr/athena/lib"
    ldirs+="/usr/local/x11r5/lib /usr/lpp/Xamples/lib"
    ldirs+="/usr/openwin/lib /usr/openwin/share/lib"

    bt_msg_chk "for X11 libraries"
    found=no
    for d in ${ldirs}; do
        if [ -n "$(ls ${d}/libX11.* 2>/dev/null)" ]; then
            X11_FLAGS_LD+=-L${d}
            bt_subst X11_FLAGS_LD
            bt_msg_result "${d}"
            found=yes
            break
        fi
    done
    if [ ${found} = no ]; then
        bt_msg_result "not found."
        [ ${BT_FEATURE_X11:-unset} = yes ] && x11_failure
        bt_msg_summary 'X11 support: no'
        return 1
    fi

    if [ ${BT_FEATURE_X11:-unset} != unset ]; then
        bt_msg_summary 'X11 support: yes'
    fi
    return 0
}

x11_failure() {
    bt_err "Cannot locate required X11 headers/libraries." \
        "Try to pass the \`--disable-x11' flag to the configure script" \
        "to disable X11 detection." \
        "If X11 is installed, set X11_DIR_INCLUDE and X11_DIR_LIB accordingly."
}

# Local Variables: ***
# mode: shell-script ***
# End: ***
# vim: syntax=sh