# Ones that have their own macros.
X11/Xlib.h	AC_PATH_X
dirent.h	AC_HEADER_DIRENT
float.h		AC_HEADER_STDC
ndir.h		AC_HEADER_DIRENT
stdarg.h	AC_HEADER_STDC
stddef.h	AC_HEADER_STDC
stdlib.h	AC_HEADER_STDC
string.h	AC_HEADER_STDC
sys/dir.h	AC_HEADER_DIRENT
sys/mkdev.h	AC_HEADER_MAJOR
sys/ndir.h	AC_HEADER_DIRENT
sys/wait.h	AC_HEADER_SYS_WAIT

# Others, to checked with AC_CHECK_HEADERS.
OS.h
alloca.h
argz.h
arpa/inet.h
errno.h
fcntl.h
fenv.h
float.h
fs_info.h
inttypes.h
langinfo.h
libintl.h
limits.h
locale.h
mach/mach.h
malloc.h
memory.h
mntent.h
mnttab.h
netdb.h
netinet/in.h
nl_types.h
nlist.h
paths.h
sgtty.h
shadow.h
stddef.h
stdio_ext.h
stdlib.h
string.h
strings.h
sys/acl.h
sys/file.h
sys/filsys.h
sys/fs/s5param.h
sys/fs_types.h
sys/fstyp.h
sys/ioctl.h
sys/mntent.h
sys/mount.h
sys/param.h
sys/socket.h
sys/statfs.h
sys/statvfs.h
sys/systeminfo.h
sys/time.h
sys/timeb.h
sys/vfs.h
sys/wait.h
sys/window.h
syslog.h
termio.h
termios.h
unistd.h
utime.h
utmp.h
utmpx.h
values.h
wchar.h
wctype.h