ctf_add_type() allows you to copy types, and all the types they depend
on, from one container to another (writable) container. This lets a
program maintaining multiple distinct containers (not in a parent-child
relationship) introduce types that depend on types in one container in
another writable one, by copying the necessary types.
libctf/
* ctf-create.c (enumcmp): New.
(enumadd): Likewise.
(membcmp): Likewise.
(membadd): Likewise.
(ctf_add_type): Likewise.
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