c89.c revision 76378 
1/*-
2 * This is the Posix.2 mandated C compiler.  Basically, a hook to the
3 * cc(1) command.
4 *
5 * Copyright (c) 2001 by Jens Schweikhardt
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29#ifndef lint
30static const char rcsid[] =
31  "$FreeBSD: head/usr.bin/c89/c89.c 76378 2001-05-08 20:27:14Z schweikh $";
32#endif /* not lint */
33
34#include <err.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38
39#include <unistd.h>
40
41#define	CC "/usr/bin/cc"	/* The big kahuna doing the actual work. */
42#define	N_ARGS_PREPENDED (sizeof(args_prepended) / sizeof(args_prepended[0]))
43
44/*
45 * We do not add -D_POSIX_SOURCE here because any POSIX source is supposed to
46 * define it before inclusion of POSIX headers. This has the additional
47 * benefit of making c89 -D_ANSI_SOURCE do the right thing (or any other
48 * -D_FOO_SOURCE feature test macro we support.)
49 */
50static char	*args_prepended[] = {
51	"-std=iso9899:199409",
52	"-pedantic"
53};
54
55static void	usage(void);
56
57/*
58 * Prepend the strings from args_prepended[] to the arg list; parse options,
59 * accepting only the POSIX c89 mandated options. Then exec cc to do the
60 * actual work.
61 */
62int
63main(int argc, char **argv)
64{
65	int Argc, i;
66	char **Argv;
67
68	Argc = 0;
69	Argv = malloc((argc + 1 + N_ARGS_PREPENDED) * sizeof *Argv);
70	if (Argv == NULL)
71		err(1, "malloc");
72	Argv[Argc++] = argv[0];
73	for (i = 0; i < N_ARGS_PREPENDED; ++i)
74		Argv[Argc++] = args_prepended[i];
75	while ((i = getopt(argc, argv, "cD:EgI:l:L:o:OsU:")) != -1) {
76		if (i == '?')
77			usage();
78		if (i == 'l') {
79			if (argv[optind - 1][0] == '-') /* -llib */
80				optind -= 1;
81			else                            /* -l lib */
82				optind -= 2;
83			break; /* -llib or -l lib starts the operands. */
84		}
85	}
86	if (argc == optind) {
87		warnx("missing operand");
88		usage();
89	}
90
91	/* Append argv[1..] at the end of Argv[]. */
92	for (i = 1; i <= argc; ++i)
93		Argv[Argc++] = argv[i];
94	(void)execv(CC, Argv);
95	err(1, "execv(" CC ")");
96}
97
98static void
99usage(void)
100{
101	fprintf(stderr,
102"usage: c89 [-c] [-D name[=value]] [...] [-E] [-g] [-I directory ...]\n"
103"       [-L directory ...] [-o outfile] [-O] [-s] [-U name ...] operand ...\n"
104"\n"
105"       where operand is one or more of file.c, file.o, file.a\n"
106"       or -llibrary\n");
107	exit(1);
108}
109