This directory contains C header files containing
operating-system-specific definitions. Each file describes a
particular operating system. The emacs configuration script edits
../config.h to include the appropriate one of these files, and then
each emacs source file includes config.h.
template.h is a generic template for system descriptions; it describes
the parameters a system file can specify.
General XEmacs Changes
---------------------------
The following is a list of those changes made globally across all
files. They are not marked individually in each header file. All
other changes should be preceded by a comment /* XEmacs change */.
1. Removed all #defines of [read|write|open|close]. This is now
handled automatically by checking the INTERRUPTIBLE_IO etc. flags.
2. Removed all instances of #undef SIGIO and replaced them with
#define BROKEN_SIGIO. Jamie says:
/* use BROKEN_SIGIO instead of this kludge -- jwz */
3. All instances of HAVE_GETWD, HAVE_DUP2, HAVE_UNISTD_H, NEED_UNISTD_H,
HAVE_GETTIMEOFDAY and NEED_REALPATH removed. We detect these
automatically with configure.
4. All instances of HAVE_X11 replaced with HAVE_X_WINDOWS. We don't
support X10 or earlier so the HAVE_X11 define was purged.
5. Most of the signal crap (e.g. redefining sigsetmask, defining
POSIX_SIGNALS) has been removed. There are four possible
signal paradigms that all systems fall into, and we auto-detect
them in configure and handle them in syssignal.h.
6. Removed references to INTERRUPT_INPUT. XEmacs does not use
this bizarre way of reading input.
7. Removed references to BROKEN_FIONREAD. FIONREAD is used only
in INTERRUPT_INPUT and in the select() emulator, neither of
which are supported in XEmacs.
8. Removed references to NOMULTIPLEJOBS. This is unused in XEmacs
and in FSF Emacs.
9. Removed references to HAVE_WAIT_HEADER and WAIT_USE_INT.
They are unnecessary with the cleaned up syswait.h in XEmacs.
(We autodetect sys/wait.h). Instead, #define or #undef
HAVE_UNION_WAIT.
10. Removed BSTRING. Not used anywhere. (If the header file
says there are bugs in bcopy() or the like, however, a
#define BROKEN_BCOPY is added for reference.)
11. Removed #defines of bcopy, bzero, bcmp, index, rindex.
XEmacs makes consistent use of the ANSI-equivalent
functions memcpy, memset, memcmp, strchr, strrchr.
12. '#define subprocesses' removed. Use '#define NO_SUBPROCESSES'
if they don't exist.
13. References to HAVE_VFORK removed. configure detects this.
14. Removed references to SYSV_SYSTEM_DIR, NONSYSTEM_DIR_LIBRARY,
HAVE_SOCKETS, HAVE_SYSVIPC. configure detects these.
15. Removed defines of HAVE_TERMIOS, HAVE_TERMIO, and
HAVE_TCATTR (when HAVE_TERMIOS was also defined).
configure detects these and systty.h automatically defines
HAVE_TCATTR when HAVE_TERMIOS is defined.
16. Removed SETPGRP_RELEASES_CTTY. Not necessary any more, with
fixed definitions of EMACS_SEPARATE_PROCESS_GROUP et al.
17. Removed defines of NLIST_STRUCT. configure detects this.
18. Removed defines of _setjmp and _longjmp. configure detects this.
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.