* lib/getopt.in.h (getopt etc.): Do the macro definitions also when
__need_getopt is defined. Undefine all macros before defining them.
* modules/getopt (Include): Clarify that including <unistd.h> is also
OK.
* tests/test-getopt.c: Add comment.
people. However, do retain the ability to work when targets are
read-only: remove the destination and temporary files before writing
them (when generated via sed or echo), or by using the -f option for
both cp and mv commands. Suggestion to use -f from Paul Eggert.
* modules/alloca-opt, modules/argz, modules/arpa_inet:
* modules/byteswap, modules/configmake, modules/fcntl:
* modules/fnmatch, modules/getopt, modules/glob, modules/inttypes:
* modules/localcharset, modules/netinet_in, modules/poll:
* modules/stdbool, modules/stdint, modules/sys_select:
* modules/sys_socket, modules/sys_stat, modules/sysexits:
* modules/alloca-opt (Makefile.am): Work also when $@ is read-only.
Ensure that each generated file is now read-only.
* modules/argz: Likewise.
* modules/arpa_inet: Likewise.
* modules/byteswap: Likewise.
* modules/configmake: Likewise.
* modules/fcntl: Likewise.
* modules/fnmatch: Likewise.
* modules/getopt: Likewise.
* modules/glob: Likewise.
* modules/inttypes: Likewise.
* modules/netinet_in: Likewise.
* modules/poll: Likewise.
* modules/stdbool: Likewise.
* modules/stdint: Likewise.
* modules/sys_select: Likewise.
* modules/sys_socket: Likewise.
* modules/sys_stat: Likewise.
* modules/sysexits: Likewise.
* modules/localcharset: Same as above, but continue using temporary
file named "t-$@" (why different?) rather than the "$@-t" used
everywhere else.
* modules/sysexits (Makefile.am): Replace literal occurrences
of "sysexit.h" more readable, and more consistent, "$@".
