CPP-DEFINES 6.35 KB
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Here are some of the cpp macros used, together with some short explanation
of their use.  Feel free to add more macros and more categories.

** Distinguishing OSes **

CYGWIN		Compiling the Cygwin port.
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__CYGWIN__	Ditto
MSDOS		Compiling the MS-DOS port.
__MSDOS__	Ditto.
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__DJGPP_MINOR__ Minor version number of the DJGPP library; used only in msdos.c and dosfns.c.
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DOS_NT		Compiling for either the MS-DOS or native MS-Windows port.
WINDOWSNT	Compiling the native MS-Windows (W32) port.
__MINGW32__	Compiling the W32 port with the MinGW port of GCC.
_MSC_VER	Compiling the W32 port with the Microsoft C compiler.
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DARWIN_OS	Compiling on Mac OS X or pure Darwin (and using s/darwin.h).
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** Distinguishing GUIs **

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HAVE_NTGUI	Use the native W32 GUI for windows, frames, menus&scrollbars.
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HAVE_NS		Use the NeXT/OpenStep/Cocoa UI under Mac OS X or GNUstep.
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NS_IMPL_GNUSTEP	Compile support for GNUstep implementation of NS GUI API.
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NS_IMPL_COCOA	Compile support for Cocoa (Apple) implementation of NS GUI API.
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HAVE_X11	Compile support for the X11 GUI.
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HAVE_X_WINDOWS	Compile support for X Window system
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  (It looks like, nowadays, if HAVE_X11 is set, HAVE_X_WINDOWS must
   be, and vice versa.  At least, this is true for configure, and
   msdos; not sure about nt.)
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USE_LUCID	Use the Lucid toolkit for menus&scrollbars.  Requires HAVE_X11.
USE_MOTIF	Use the Motif toolkit for menus&scrollbars.  Requires HAVE_X11.
USE_GTK		Use the Gtk   toolkit for menus&scrollbars.  Requires HAVE_X11.

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** Frame types **

FRAME_TERMCAP_P	A tty (character terminal) frame.
FRAME_X_P	A frame on X Window system.
FRAME_MSDOS_P	An MS-DOS frame (used only by the DOS port).
FRAME_W32_P	A frame using native MS-Windows GUI.
FRAME_WINDOW_P	A GUI frame (like X, w32, etc.)

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** Support for accessing other processes on the system **

HAVE_PROCFS     The /proc filesystem is supported.

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** Compile-time options **
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REL_ALLOC	Compile in the relocatable memory allocator ralloc.c.
SYSTEM_MALLOC	Use the system library's malloc.
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subprocesses    System can use subprocesses (for M-x shell for example).  Defined by default, only MSDOS undefines it.
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USE_LISP_UNION_TYPE Define it in lisp.h to make Lisp_Object be a union type instead of the default int.
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** System specific macros, decribed in detail in src/s/template.h
CLASH_DETECTION
COFF
FIRST_PTY_LETTER
HAVE_PTYS
HAVE_TERMIO
HAVE_TERMIOS
INTERRUPT_INPUT
NARROWPROTO
SEPCHAR
SYSTEM_TYPE

** Machine specific macros, decribed in detail in src/m/template.h
VIRT_ADDR_VARIES

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** Misc macros
USER_FULL_NAME   If defined, overrides the default pw->pw_gecos for getting at the full user name.  Only MSDOS overrides the default.

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** Replace, the definition is trivial: SWITCH_ENUM_CAST
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** Defines from src/m/*.h and src/s/*.h.  Some of these might not be used in the code anymore, so they can be removed.  The HAVE_* definitions are probably handled by autoconf, so it might be possible to just remove them from src/[sm]/*.h.

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AIX
AMPERSAND_FULL_NAME
BITS_PER_EMACS_INT
BITS_PER_LONG
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BITS_PER_CHAR
BITS_PER_SHORT
BITS_PER_INT
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BROKEN_DATAGRAM_SOCKETS
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BROKEN_FIONREAD
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BROKEN_GET_CURRENT_DIR_NAME
BROKEN_NON_BLOCKING_CONNECT
BROKEN_PTY_READ_AFTER_EAGAIN
BROKEN_SA_RESTART
BROKEN_SIGAIO
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BROKEN_SIGIO
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BROKEN_SIGPOLL
BROKEN_SIGPTY
BSD4_2
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BSD4_3
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BSD_SYSTEM
CLASH_DETECTION
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DATA_SEG_BITS
DATA_START
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DBL_MIN_REPLACEMENT
DEFAULT_SOUND_DEVICE
DEVICE_SEP
DIRECTORY_SEP
DONT_REOPEN_PTY
DOUG_LEA_MALLOC
DebPrint
EMACSDEBUG
EMACS_CONFIGURATION
EMACS_CONFIG_OPTIONS
EMACS_INT
EMACS_UINT
FILE_SYSTEM_CASE
FLOAT_CHECK_DOMAIN
GC_LISP_OBJECT_ALIGNMENT
GC_MARK_SECONDARY_STACK
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GC_MARK_STACK
GC_SETJMP_WORKS
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GMALLOC_INHIBIT_VALLOC
GNU_LIBRARY_PENDING_OUTPUT_COUNT
GNU_LINUX
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GNU_MALLOC
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HAVE_AIX_SMT_EXP
HAVE_CBRT
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HAVE_CLOSEDIR
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HAVE_DUP2
HAVE_EUIDACCESS
HAVE_FMOD
HAVE_FPATHCONF
HAVE_FREXP
HAVE_FSYNC
HAVE_FTIME
HAVE_GETCWD
HAVE_GETDOMAINNAME
HAVE_GETHOSTNAME
HAVE_GETLOADAVG
HAVE_GETPAGESIZE
HAVE_GETPT
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HAVE_GETTIMEOFDAY
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HAVE_GETWD
HAVE_H_ERRNO
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HAVE_INET_SOCKETS
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HAVE_INVERSE_HYPERBOLIC
HAVE_LIBKSTAT
HAVE_LIMITS_H
HAVE_LINUX_VERSION_H
HAVE_LOGB
HAVE_LONG_FILE_NAMES
HAVE_LRAND48
HAVE_MENUS
HAVE_MKDIR
HAVE_MKTIME
HAVE_MOUSE
HAVE_PERROR
HAVE_PSTAT_GETDYNAMIC
HAVE_PWD_H
HAVE_RANDOM
HAVE_RENAME
HAVE_RES_INIT
HAVE_RINT
HAVE_RMDIR
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HAVE_SELECT
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HAVE_SETLOCALE
HAVE_SETPGID
HAVE_SETRLIMIT
HAVE_SETSID
HAVE_SHUTDOWN
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HAVE_SOCKETS
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HAVE_SOUND
HAVE_STDLIB_H
HAVE_STRERROR
HAVE_STRFTIME
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HAVE_STRING_H
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HAVE_STRUCT_UTIMBUF
HAVE_SYSINFO
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HAVE_SYSV_SIGPAUSE
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HAVE_SYS_SELECT_H
HAVE_SYS_SYSTEMINFO_H
HAVE_SYS_TIMEB_H
HAVE_SYS_TIME_H
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HAVE_TCATTR
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HAVE_TERMIOS_H
HAVE_TIMEVAL
HAVE_TM_ZONE
HAVE_TZSET
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HAVE_UNISTD_H
HAVE_UTIMES
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HAVE_UTIME_H
HAVE_WINDOW_SYSTEM
HAVE_WORKING_VFORK
HAVE_XRMSETDATABASE
HPUX
INTERNAL_TERMINAL
IS_ANY_SEP
IS_DIRECTORY_SEP
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LINKER
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LINUX_VERSION_CODE
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LISP_FLOAT_TYPE
LNOFLSH
LOCALTIME_CACHE
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MAIL_USE_FLOCK
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MAIL_USE_LOCKF
MAIL_USE_POP
MAIL_USE_SYSTEM_LOCK
MAXPATHLEN
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MIN_PTY_KERNEL_VERSION -- only used on Mac
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MODE_LINE_BINARY_TEXT
MUST_UNDEF__STDC__
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NLIST_STRUCT
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NO_ABORT
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NO_EDITRES
NO_MATHERR
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NO_TERMIO
NSIG
NSIG_MINIMUM
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NULL
NULL_DEVICE
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ORDINARY_LINK
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O_APPEND
O_RDONLY
O_RDWR
PAGESIZE
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PENDING_OUTPUT_COUNT
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POSIX
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PREFER_VSUSP
PTY_ITERATION
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PTY_NAME_SPRINTF
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PTY_OPEN
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PTY_TTY_NAME_SPRINTF
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PURESIZE
RUN_TIME_REMAP
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SA_RESTART
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SEGMENT_MASK
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SETPGRP_RELEASES_CTTY
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SETUP_SLAVE_PTY
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SIGALRM
SIGCHLD
SIGHUP
SIGKILL
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SIGNALS_VIA_CHARACTERS
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SIGPIPE
SIGQUIT
SIGTRAP
SOLARIS2
STDC_HEADERS
SYSTEM_PURESIZE_EXTRA
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SYSTEM_MALLOC
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SYSV_SYSTEM_DIR
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TAB3
TABDLY
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TERM
TIME_WITH_SYS_TIME
TIOCSIGSEND
TM_IN_SYS_TIME
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ULIMIT_BREAK_VALUE
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UNIX98_PTYS
USE_CRT_DLL
USE_TOOLKIT_SCROLL_BARS
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USG
USG5
USG5_4
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USG_SUBTTY_WORKS
VALBITS
WRETCODE
XINT
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XOS_NEEDS_TIME_H
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XPNTR
XSET
XUINT
_AIX
_ARCH_PPC64
_CALLBACK_
_FILE_OFFSET_BITS
_LP64
_MALLOC_INTERNAL
_NAIVE_DOS_REGS
_VARARGS_
_WINSOCKAPI_
_WINSOCK_H
__ELF__
__FreeBSD__
__GNUC__
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__GNU_LIBRARY__
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__GNUC_MINOR__
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__NetBSD__
__OpenBSD__
__STDC__
__arch64__
__cplusplus
__hpux
__ia64__
__linux__
__mc68000__
__mips__
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_longjmp
_setjmp
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_start
abort
access
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alloca
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brk
calloc
chdir
chmod
chown
close
const
creat
ctime
dup
dup2
edata
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emacs
etext
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execlp
execvp
fdopen
fileno
fopen
free
fsync
ftruncate
fwrite
getdefdir
getdisk
getenv
getpid
getuid
gmtime
i386
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index
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init_process
isatty
kill
link
linux
localtime
logb
lseek
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m68k
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malloc
mkdir
mktemp
open
pclose
pipe
popen
random
read
realloc
rename
rindex
rmdir
sbrk
select
sigmask
signal
sigsetmask
sleep
spawnve
srandom
strdup
strerror
stricmp
strnicmp
strupr
sys_nerr
system
temacs
tzname
tzset
umask
unix
unlink
utimbuf
utime
vfork
wait
write
xfree