#
# $Id: link.in,v 1.49 2004/03/24 18:36:01 jmmv Exp $
# C/C++ object linking functions.
#
# buildtool
# Copyright (c) 2003, 2004 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.
#

BT_TARGET_VARS+="BT_FLAGS_LD BT_LIBS"

btown_link_parse_args() {
    local arg=
    local res=
    local archives= libs= objs= targets=
    local dirs_libs= dirs_rpath=
    local flags_L= flags_other= flags_rpath= flags_unknown=
    local shared=no

    [ -n "${LogFile}" ] && echo "[link: original call] $*" >> ${LogFile}

    while [ $# -gt 0 ]; do
        arg=$(echo ${1} | sed -e 's|"|\\"|g')
        case ${arg} in
            -L*)
                arg=$(echo ${arg} | sed -e s/-L//)
                if [ -d ${arg} ]; then
                    arg=$(cd ${arg} && pwd)
                    flags_L+=-L${arg}
                    dirs_libs+=${arg}
                    [ ${arg##${BT_WORKDIR}} = ${arg} ] && dirs_rpath+=${arg}
                fi
                ;;

            -Wl,-r*|-Wl,-R*|-rpath=*)
                arg=$(echo ${arg} | sed -e s/-Wl,-r// -e s/-Wl,-R// \
                    -e s/-rpath=//)
                [ -d ${arg} ] && arg=$(cd ${arg} && pwd)
                dirs_rpath+=${arg}
                ;;

            -export-dynamic)
                flags_other+=${BT_LIB_FLAG_EXPORTDYNAMIC}
                ;;

            -l*)
                if [ ${BT_LIB_MKPIC} = yes ]; then
                    libs+=${arg}
                else
                    local d found=no
                    arg=$(echo ${arg} | sed -e s/-l//)
                    for d in ${dirs_libs}; do
                        if [ -f ${d}/lib${arg}.a ]; then
                            archives+=${d}/lib${arg}.a
                            found=yes
                            break
                        fi
                    done
                    [ ${found} = no ] && libs="${libs} ${arg}"
                fi
                ;;

            -o)
                target=${2}; shift
                ;;

            -shared)
                shared=yes
                ;;

            -soname=*)
                arg=$(echo ${arg} | sed -e 's/-soname=//')
                if [ ${BT_LIB_PIC_SONAME} = yes ]; then
                    flags_other="-Wl,-soname=${arg}"
                fi
                shared=yes
                ;;

            *)
                if echo ${arg} | grep '^-' >/dev/null; then
                    btcmn_warn "link: passing unhandled option \`${arg}'"
                    flags_unknown+=${arg}
                elif echo ${arg} | grep '.a$' >/dev/null; then
                    archives+=${arg}
                else
                    objects+=${arg}
                fi
                ;;
        esac
        shift
    done

    if [ ${BT_FEATURE_RPATH} = yes ]; then
        local d
        for d in ${BT_DIR_LIB} ${dirs_rpath}; do
            flags_rpath+=${BT_LINK_FLAG_RPATH}${d}
        done
    fi

    if [ ${shared} = yes ]; then
        flags_other="-shared ${flags_other}"
    fi

    res="${flags_L} ${flags_rpath} ${flags_other} ${flags_unknown} -o ${target} ${objects} ${archives} ${libs}" # NOLINT
    [ -n "${LogFile}" ] && echo "[link: call rewrote as] ${res}" >> ${LogFile}
    echo ${res}
}

bt_link_c() {
    local cmd

    [ -z ${BT_PROG_CC} ] && btcmn_err \
        "link: no C linker available (BT_PROG_CC is not set)" \
        "      add a call to bt_check_env_c in your config script"

    cmd="${BT_PROG_CC} $(btown_link_parse_args $*)"
    echo "[link] ${cmd}"
    ${cmd} || bt_die
}

bt_link_cxx() {
    local cmd

    [ -z ${BT_PROG_CXX} ] && btcmn_err \
        "link: no C++ linker available (BT_PROG_CXX is not set)" \
        "      add a call to bt_check_env_c in your config script"

    cmd="${BT_PROG_CXX} $(btown_link_parse_args $*)"
    echo "[link] ${cmd}"
    ${cmd} || bt_die
}

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# mode: shell-script ***
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# vim: syntax=sh