Think about /usr/bin/gcc where /usr is symlink to /mnt/somewhere/else and then ../bin/.. part is symlink as well and gcc too is symlink...
Now please about that tail recusion thingy again if you can. Heh.
Unfortunatelly you do care about path - just not path you though about...
As "track for stack usage" - it'll be nightmare to administer: sometimes you can compile this program but if b-tree in filesystem is changed somewhat you're suddenly can not do it. Gosh.
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