Not a Perl solution, but if you just want a quick result: 
$ find . -name '*.[ch]' | xargs egrep -w 'foo|bar|baz|boz'

[download]

Dave.

In reply to Re: Search thru directories of .c & .h files for @Constants by dave_the_m
in thread Search thru directories of .c & .h files for @Constants by pmonk4ever

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