findlibs

#!/bin/bash

find_lib_providing()  {
    symbol="$1"
    shift
    scanelf -s "$symbol" "$@" |
        grep "$symbol" |
        while read -r _ _ file; do
            nm -Cu "$file" |
            grep -q "$symbol" ||
            echo "$file";
        done
}

get_missing_symbols() {
    file="$1"
    nm -Cu "$file" | sed -e 's/.* \([^ ]\+\)$/\1/' -e '/GLIBC/d'
}

print_help() {
    echo "Usage: $0 <file> <libs_directories...>"
    echo "This is a tool to help to determine dependencies of a library"
}

set -e
which nm >/dev/null
which scanelf >/dev/null

if [ "$1" = "-h" ]; then
    print_help
    exit 0
fi

if [ $# -lt 2 ]; then
    echo "Please provide file and a lib directory"
    print_help
    exit 1
fi

if [ ! -f "$1" ]; then
    echo "$1 is not a file"
    print_help
    exit 1
fi
file="$1"
shift

libs=( )
while [ -n "$1" ]; do
    if [ ! -d "$1" ]; then
        echo "$1 is not a directory"
        print_help
        exit 1
    fi
    libs+=("$1")
    shift
done

for symbol in $(get_missing_symbols "$file"); do
    echo "$(find_lib_providing "$symbol" "${libs[@]}")" "$symbol"
done | sort