On 04/12/2018 12:05 PM, Carlos O'Donell wrote: > diff --git a/man3/crypt.3 b/man3/crypt.3 > index 3e6552ad8..58c62d93d 100644 > --- a/man3/crypt.3 > +++ b/man3/crypt.3 > @@ -188,8 +188,26 @@ POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD. > .BR crypt_r () > is a GNU extension. > .SH NOTES > -.SS Glibc notes > -The glibc2 version of this function supports additional > +.SS Availability in glibc > +The > +.BR crypt (), > +.BR encrypt (), > +and > +.BR setkey () > +functions are part of the POSIX.1-2008 XSI Options Group for Encryption > +and are optional. If the interfaces are not available then the symbolic > +constant > +.BR _XOPEN_CRYPT > +is either not defined or defined to -1, and can be checked at runtime with > +.BR sysconf (). > +This may be the case if the downstream distribution has switched from glibc > +crypt to libxcrypt. When recompiling applications in such distributions the > +user must detect if > +.BR _XOPEN_CRPYT "CRYPT" (Looks like this was caught already.) > +is not available and include crypt.h for the function prototypes; otherwise > +libxcrypt is a ABI compatible drop-in replacement. "an ABI" I would also hyphenate "ABI-compatible". (The same issues were also in encrypt.3 but it sounds like the content was deduplicated already.) Rical -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
