From: [EMAIL PROTECTED] Date: Wed, 27 Oct 1999 20:42:04 +0200 (CEST) a question: the _GNU_SOURCE define only for hurd and only for compile the other gnu sources?
_GNU_SOURCE is used to indicate that GNU extensions should be made available to your program. Most things beyond what Unix98 specifies for <utmpx.h>, such as WTMP_FILE, are considered GNU extensions. That's why you have to specify _GNU_SOURCE to compile ssh. The GNU C Library has several macros that do similar things as _GNU_SOURCE. They are called "feature test macros". There is for instance _POSIX_SOURCE (makes everthing defined by POSIX.1 available), _BSD_SOURCE (makes things found on BSD systems available). A complete list can be found in the glibc documentation. Mark
