** Distinguishing OSes **
-MAC_OS Compiling for some version of Mac OS?
-MAC_OS8 Compiling for Mac OS version 8. Requires MAC_OS?
-MAC_OSX Compiling for Mac OS X? Is that also valid for Darwin?
-MAC_OS_X ?? Apparently only used once in mac.c.
+MAC_OS Compiling for the `mac' window-system.
+MAC_OS8 Compiling for Mac OS Classic (v8 or v9). No longer supported, all code using it can be removed.
+MAC_OSX Compiling for Mac OS X. Not bare Darwin.
CYGWIN Compiling the Cygwin port.
-MSDOS Compiling the MSDOS port.
-DOS_NT Compiling for either the MSDOS or W32 port.
-WINDOWSNT Compiling the W32 port.
-WINDOWS_NT ?? Only once in dispextern.h
+__CYGWIN__ Ditto
+MSDOS Compiling the MS-DOS port.
+__MSDOS__ Ditto.
+__DJGPP__ Major version number of the DJGPP library for the DOS port.
+__DJGPP_MINOR__ Minor version number of the DJGPP library.
+__GO32__ Compiling the DOS port with DJGPP v1.x (obsolete).
+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.
+IRIX6_5 Compiling on Irix-6.5
** Distinguishing GUIs **
-HAVE_NTGUI Compile support for the W32 GUI.
+HAVE_NTGUI Use the native W32 GUI for windows, frames, menus&scrollbars.
HAVE_CARBON Compile support for the Carbon GUI. Requires MAC_OS?
HAVE_X11 Compile support for the X11 GUI.
+HAVE_X_WINDOWS Compile support for X Window system
X11 ?? Makefile.in suggests it's equivalent to HAVE_X11
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.
+** 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_MAC_P A Mac frame.
+FRAME_W32_P A frame using native MS-Windows GUI.
+FRAME_WINDOW_P A GUI frame (like X, w32, etc.)
+
+** Compile-time options **
+REL_ALLOC Compile in the relocatable memory allocator ralloc.c.
+SYSTEM_MALLOC Use the system library's malloc.
+
+** Replace, the definition is trivial: SWITCH_ENUM_CAST
+
+** Temporarily put defines from removed files here, check if these macros need to be documented or removed because they are not used anymore. **
+
+ADDR_CORRECT
+ADJUST_TEXTBASE
+ADJUST_TEXT_SCNHDR_SIZE
+A_TEXT_OFFSET
+A_TEXT_SEEK
+BAUD_CONVERT
+BROKEN_FIONREAD
+BROKEN_SIGIO
+BROKEN_TIOCGETC
+BROKEN_TIOCGWINSZ
+BSD4_2
+BSD4_3
+BSD4_4
+BSD_PGRPS
+BSD_SYSTEM
+BSTRING
+CANNOT_DUMP
+CLASH_DETECTION
+COFF
+COFF_BSD_SYMBOLS
+CRT0_DUMMIES
+C_DEBUG_SWITCH
+C_OPTIMIZE_SWITCH
+C_SWITCH_MACHINE
+C_SWITCH_SYSTEM
+DATA_END
+DATA_SECTION_ALIGNMENT
+DATA_SEG_BITS
+DATA_START
+DEBUG
+DECLARE_GETPWUID_WITH_UID_T
+DEFAULT_ENTRY_ADDRESS
+DOT_GLOBAL_START
+DUMMIES
+ELF
+EXEC_PAGESIZE
+EXPLICIT_SIGN_EXTEND
+FIRST_PTY_LETTER
+FSCALE
+GC_MARK_STACK
+GC_SETJMP_WORKS
+GETPGRP_NO_ARG
+GNU_MALLOC
+HAVE_ALLOCA
+HAVE_CLOSEDIR
+HAVE_CONFIG_H
+HAVE_CRTN
+HAVE_GETTIMEOFDAY
+HAVE_INET_SOCKETS
+HAVE_LIBDNET
+HAVE_LIBINTL
+HAVE_LIBRESOLV
+HAVE_PTYS
+HAVE_SELECT
+HAVE_SOCKETS
+HAVE_SYSVIPC
+HAVE_SYSV_SIGPAUSE
+HAVE_SYS_WAIT_H
+HAVE_TCATTR
+HAVE_TERMIO
+HAVE_TERMIOS
+HAVE_TEXT_START
+HAVE_UNION_WAIT
+HAVE_UNISTD_H
+HAVE_UNIX_DOMAIN
+HAVE_UTIMES
+HAVE_WAIT_HEADER
+HAVE_X11R6
+HAVE_XSCREENNUMBEROFSCREEN
+HAVE_X_WINDOWS
+INHIBIT_X11R6_XIM
+INTEL386
+INTERRUPT_INPUT
+IRIS
+IRIS_4D
+KERNEL_FILE
+LDAV_SYMBOL
+LD_SWITCH_MACHINE
+LD_SWITCH_SYSTEM
+LD_SWITCH_SYSTEM_TEMACS
+LIBS_DEBUG
+LIBS_MACHINE
+LIBS_SYSTEM
+LIBS_TERMCAP
+LIBX11_SYSTEM
+LIBXMU
+LIB_GCC
+LIB_MOTIF
+LIB_STANDARD
+LIB_X11_LIB
+LINKER
+LOAD_AVE_CVT
+LOAD_AVE_TYPE
+MAIL_USE_FLOCK
+MKDIR_PROTOTYPE
+MOTIF
+NARROWPROTO
+NEED_ERRNO
+NEED_PTEM_H
+NEED_SIOCTL
+NLIST_STRUCT
+NOMULTIPLEJOBS
+NONSYSTEM_DIR_LIBRARY
+NOT_C_CODE
+NO_ARG_ARRAY
+NO_REMAP
+NO_SIOCTL_H
+NO_SOCK_SIGIO
+NO_TERMIO
+NO_UNION_TYPE
+NSIG
+NSIG_MINIMUM
+OBJECTS_MACHINE
+ORDINARY_LINK
+O_NDELAY
+PENDING_OUTPUT_COUNT
+PERROR
+PNTR_COMPARISON_TYPE
+POSIX_SIGNALS
+PREFER_VSUSP
+PTY_ITERATION
+PTY_NAME_SPRINTF
+PTY_OPEN
+PTY_TTY_NAME_SPRINTF
+PURESIZE
+READ
+REL_ALLOC
+RUN_TIME_REMAP
+SECTION_ALIGNMENT
+SEEK
+SEGMENT_MASK
+SEGSIZ
+SETUP_SLAVE_PTY
+SIGMASKTYPE
+SIGNALS_VIA_CHARACTERS
+SIGN_EXTEND_CHAR
+SIGTYPE
+START_FILES
+SVR4
+SYSTEM_MALLOC
+SYSTEM_TYPE
+SYSV_PTYS
+SYSV_SYSTEM_DIR
+S_IEXEC
+S_IFDIR
+S_IFLNK
+S_IFMT
+S_IREAD
+S_IWRITE
+TERMCAP
+TERMINFO
+TEXT_END
+TEXT_START
+THIS_IS_MAKEFILE
+ULIMIT_BREAK_VALUE
+UNEXEC
+USE_MMAP_FOR_BUFFERS
+USG
+USG5
+USG5_3
+USG5_4
+USG_JOBCTRL
+USG_SHARED_LIBRARIES
+VIRT_ADDR_VARIES
+WORDS_BIG_ENDIAN
+WORD_MACHINE
+XINT
+XSET
+XUINT
+X_DEFAULT_FONT
+_ABIN32
+_MIPS_SZLONG
+_POSIX_SOURCE
+_longjmp
+_setjmp
+alloca
+data_start
+drem
+emacs
+entry
+etext
+fatal
+fchmod
+getpgrp
+hp9000s800
+index
+jmp_buf
+longjmp
+m68000
+m68k
+magic
+mc68000
+mips
+sel
+subprocesses
+sun
+text_start
+
# arch-tag: bc80061a-1168-4911-9766-46aaf2640250