#!/bin/sh

LC_ALL=C

export LC_ALL

stat=0

so="$1"

def="$2"

PATTERN="_ANCHOR_"

TMPFILE="$(mktemp .nm-check-exports.XXXXXX)"

get_syms() {

    ${NM:-nm} "$1" |

    sed -n 's/^[[:xdigit:]]\+ [DT] //p' |

    sort

}

get_syms_from_def() {

    sed -n 's/^\t\(\([_a-zA-Z0-9]\+\)\|#\s*\([_a-zA-Z0-9]\+@@\?[_a-zA-Z0-9]\+\)\);$/\2\3/p' "$1" |

    sort

}

anchor() {

    sed "s/.*/$PATTERN\0$PATTERN/"

}

unanchor() {

    sed "s/^$PATTERN\(.*\)$PATTERN\$/\1/"

}

get_syms "$so" | anchor > "$TMPFILE"

WRONG="$(get_syms_from_def "$def" | anchor | grep -F -f - "$TMPFILE" -v)"

RESULT=$?

if [ $RESULT -eq 0 ]; then

    stat=1

    echo ">>library \"$so\" exports symbols that are not in linker script \"$def\":"

    echo "$WRONG" | unanchor | nl

fi

get_syms_from_def "$def" | anchor > "$TMPFILE"

WRONG="$(get_syms "$so" | anchor | grep -F -f - "$TMPFILE" -v)"

RESULT=$?

if [ $RESULT -eq 0 ]; then

    stat=1

    echo ">>linker script \"$def\" contains symbols that are not exported by library \"$so\":"

    echo "$WRONG" | unanchor | nl

fi

rm -rf "$TMPFILE"

exit $stat