[lemma=back] [word=a] [□=□]
[lemma=back] [word=a] [lemma=□]
[lemma=back] [word=a] [word=□]
You invoke ifnames with a list of file names ( you can also pipe the files to ifnames through stdin ) , and it spits back a sorted list of all the #if , #ifdef , #elif , and #ifndef statements it finds .