subprocesses System can use subprocesses (for M-x shell for example). Defined by default, only MSDOS undefines it.
USE_LISP_UNION_TYPE Define it in lisp.h to make Lisp_Object be a union type instead of the default int.
-** System specific macros, decribed in detail in src/s/template.h
+** System specific macros, described in detail in src/s/template.h
CLASH_DETECTION
COFF
FIRST_PTY_LETTER
SEPCHAR
SYSTEM_TYPE
-** Machine specific macros, decribed in detail in src/m/template.h
-VIRT_ADDR_VARIES
-
** 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.
HAVE_FPATHCONF
HAVE_FREXP
HAVE_FSYNC
-HAVE_FTIME
HAVE_GETCWD
-HAVE_GETDOMAINNAME
HAVE_GETHOSTNAME
HAVE_GETLOADAVG
HAVE_GETPAGESIZE
NO_TERMIO
NSIG
NSIG_MINIMUM
-NULL
NULL_DEVICE
ORDINARY_LINK
O_APPEND
chmod
chown
close
-const
creat
ctime
dup