[Bug 259790] cftmerge(1) manual page does not explain what a CTF is

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 12 Nov 2021 17:56:30 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259790

--- Comment #1 from Michael Dexter <editor@callfortesting.org> ---
Some background kindly from the wilds that may help with a concise description:

"CTF is designed to represent C types in a more compact format (and simply)
than DWARF. It's used extensively in illumos with dtrace, as well as for system
debugging. ctfmerge specifically will uniqify the data from all the
constitutate .o files (think how many files will have a definition of pid_t,
etc)"

https://github.com/illumos/illumos-gate/blob/master/usr/src/uts/common/sys/ctf.h#L38-L56

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