remove local getopt_long() implementation

getopt_long() is widely supported these days, removing it from the
source tree should be okay.

Here's documentation or the implementation of getopt_long on many
systems:

All the BSDs:
https://man.netbsd.org/NetBSD-9.2-STABLE/getopt_long.3
https://man.openbsd.org/OpenBSD-7.0/getopt_long
https://www.freebsd.org/cgi/man.cgi?query=getopt_long
https://leaf.dragonflybsd.org/cgi/web-man?command=getopt_long

Illumos (OpenSolaris fork):
https://illumos.org/man/3c/getopt_long

The musl, newlib, and uclibc-ng libcs:
https://gogs.waldemar-brodkorb.de/oss/uclibc-ng/src/master/libc/unistd/getopt_long-simple.c#L49-L52
https://git.musl-libc.org/cgit/musl/tree/src/misc/getopt_long.c#n140
https://sourceware.org/git/?p=newlib-cygwin.git;a=blob;f=newlib/libc/stdlib/getopt.c;h=d4f225a7a735dc741d2874eb6c131b6fce2967c5;hb=HEAD#l475

Mingw-w64:
https://github.com/mirror/mingw-w64/blob/master/mingw-w64-crt/misc/getopt.c#L542-L549

Mac OS X:
https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/getopt_long.3.html

1 files changed, 0 insertions, 173 deletions

diff --git a/src/getopt1.c b/src/getopt1.c
deleted file mode 100644
index 5a5c483..0000000
--- a/src/getopt1.c
+++ /dev/null
@@ -1,173 +0,0 @@
-/* getopt_long and getopt_long_only entry points for GNU getopt.
-   Copyright (C) 1987,88,89,90,91,92,93,94,96,97 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#include "getopt.h"
-
-#if !defined (__STDC__) || !__STDC__
-/* This is a separate conditional since some stdc systems
-   reject `defined (const)'.  */
-#ifndef const
-#define const
-#endif
-#endif
-
-#include <stdio.h>
-
-/* Comment out all this code if we are using the GNU C Library, and are not
-   actually compiling the library itself.  This code is part of the GNU C
-   Library, but also included in many other GNU distributions.  Compiling
-   and linking in this code is a waste when using the GNU C library
-   (especially if it is a shared library).  Rather than having every GNU
-   program understand `configure --with-gnu-libc' and omit the object files,
-   it is simpler to just do this in the source for each such file.  */
-
-#define GETOPT_INTERFACE_VERSION 2
-#if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
-#include <gnu-versions.h>
-#if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
-#define ELIDE_CODE
-#endif
-#endif
-
-#ifndef ELIDE_CODE
-
-/* This needs to come after some library #include
-   to get __GNU_LIBRARY__ defined.  */
-#ifdef __GNU_LIBRARY__
-#include <stdlib.h>
-#endif
-
-#ifndef	NULL
-#define NULL 0
-#endif
-
-int getopt_long(argc, argv, options, long_options, opt_index)
-int argc;
-char *const *argv;
-const char *options;
-const struct option *long_options;
-int *opt_index;
-{
-	return _getopt_internal(argc, argv, options, long_options, opt_index, 0);
-}
-
-/* Like getopt_long, but '-' as well as '--' can indicate a long option.
-   If an option that starts with '-' (not '--') doesn't match a long option,
-   but does match a short option, it is parsed as a short option
-   instead.  */
-
-int getopt_long_only(argc, argv, options, long_options, opt_index)
-int argc;
-char *const *argv;
-const char *options;
-const struct option *long_options;
-int *opt_index;
-{
-	return _getopt_internal(argc, argv, options, long_options, opt_index, 1);
-}
-
-#endif				/* Not ELIDE_CODE.  */
-
-#ifdef TEST
-
-#include <stdio.h>
-
-int main(argc, argv)
-int argc;
-char **argv;
-{
-	int c;
-	int digit_optind = 0;
-
-	while (1) {
-		int this_option_optind = optind ? optind : 1;
-		int option_index = 0;
-		static struct option long_options[] = {
-			{"add", 1, 0, 0},
-			{"append", 0, 0, 0},
-			{"delete", 1, 0, 0},
-			{"verbose", 0, 0, 0},
-			{"create", 0, 0, 0},
-			{"file", 1, 0, 0},
-			{0, 0, 0, 0}
-		};
-
-		c = getopt_long(argc, argv, "abc:d:0123456789", long_options, &option_index);
-		if (c == -1)
-			break;
-
-		switch (c) {
-		case 0:
-			printf("option %s", long_options[option_index].name);
-			if (optarg)
-				printf(" with arg %s", optarg);
-			printf("\n");
-			break;
-
-		case '0':
-		case '1':
-		case '2':
-		case '3':
-		case '4':
-		case '5':
-		case '6':
-		case '7':
-		case '8':
-		case '9':
-			if (digit_optind != 0 && digit_optind != this_option_optind)
-				printf("digits occur in two different argv-elements.\n");
-			digit_optind = this_option_optind;
-			printf("option %c\n", c);
-			break;
-
-		case 'a':
-			printf("option a\n");
-			break;
-
-		case 'b':
-			printf("option b\n");
-			break;
-
-		case 'c':
-			printf("option c with value `%s'\n", optarg);
-			break;
-
-		case 'd':
-			printf("option d with value `%s'\n", optarg);
-			break;
-
-		case '?':
-			break;
-
-		default:
-			printf("?? getopt returned character code 0%o ??\n", c);
-		}
-	}
-
-	if (optind < argc) {
-		printf("non-option ARGV-elements: ");
-		while (optind < argc)
-			printf("%s ", argv[optind++]);
-		printf("\n");
-	}
-
-	exit(0);
-}
-
-#endif				/* TEST */