root/trunk/extend_depcomp.sh

if grep -q xlc depcomp ; then
        echo "depcomp already extended to handle xlc. No change to file."
else
        sed '/^aix)/,/;;/ {
                        H
                        s/\.u/.d/
                        s/^aix)/xlc) #following fragment is just like AIX but the extension is .d instead of .u/
                }
                /^icc)/ {
                        x
                        G                       
                }
        ' depcomp > temp
        mv temp depcomp
fi