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e148b73013
This utility function is almost useless (all it does is casts the result of a strerror) but has a seriously confusing name. Over and over again I have accidentally called it instead of ctf_errmsg, and hidden a time-bomb for myself in a hard-to-test error-handling path: since ctf_strerror is just a strerror wrapper, it cannot handle CTF errnos, unlike ctf_errmsg. It's astonishingly lucky that none of these errors have crept into any commits to date. Fuse it into ctf_errmsg and drop it. libctf/ * ctf-impl.h (ctf_strerror): Delete. * ctf-subr.c (ctf_strerror): Likewise. * ctf-error.c (ctf_errmsg): Stop using ctf_strerror: just use strerror directly.