OpenWrt – Rev 1

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#!/usr/bin/env bash
[ -n "$CROSS" ] || {
        echo "The variable CROSS must be set to point to the cross-compiler prefix"
        exit 1
}

MODULE="$1"

[ "$#" -ne 1 ] && {
        echo "Usage: $0 <module>"
        exit 1
}

ARGS=
if [ -n "$KEEP_SYMBOLS" ]; then
        ARGS="-X --strip-debug"
else
        ARGS="-x -G __this_module --strip-unneeded"
fi

if [ -z "$KEEP_BUILD_ID" ]; then
    ARGS="$ARGS -R .note.gnu.build-id"
fi

${CROSS}objcopy \
        -R .comment \
        -R .pdr \
        -R .mdebug.abi32 \
        -R .gnu.attributes \
        -R .reginfo \
        -R .MIPS.abiflags \
        -R .note.GNU-stack \
        $ARGS \
        "$MODULE" "$MODULE.tmp"

[ -n "$NO_RENAME" ] && {
        mv "${MODULE}.tmp" "$MODULE"
        exit 0
}

${CROSS}nm "$MODULE.tmp" | awk '
BEGIN {
        n = 0
}

$3 && $2 ~ /[brtd]/ && $3 !~ /\$LC/ && !def[$3] {
        print "--redefine-sym "$3"=_"n;
        n = n + 1
        def[$3] = 1
}
' > "$MODULE.tmp1"

${CROSS}objcopy `cat ${MODULE}.tmp1` ${MODULE}.tmp ${MODULE}.out
mv "${MODULE}.out" "${MODULE}"
rm -f "${MODULE}".t*