Using awk, gawk to print multiple matching lines in multiple files

This basically prints the trio of source, destination and include only
when include either contains libnmt.a or libnml.a

egrep -e 'source|destination|include' *.map.xml | awk '/source/ {SRC=$0}; /destination/ { DEST=$0}; /libnmt\.a/ || /libnml\.a/ { print SRC "\n" DEST "\n" $0}'