usr.bin/c89/c89.c

   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  * $FreeBSD: src/usr.bin/c89/c89.c,v 1.1.2.1 2001/05/22 19:05:01 schweikh Exp $
  29  * $DragonFly: src/usr.bin/c89/c89.c,v 1.2 2003/06/17 04:29:25 dillon Exp $
  30  */
  31
  32 #include <err.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #include <unistd.h>
  38
  39 #define CC "/usr/bin/cc"        /* The big kahuna doing the actual work. */
  40 #define N_ARGS_PREPENDED (sizeof(args_prepended) / sizeof(args_prepended[0]))
  41
  42 /*
  43  * We do not add -D_POSIX_SOURCE here because any POSIX source is supposed to
  44  * define it before inclusion of POSIX headers. This has the additional
  45  * benefit of making c89 -D_ANSI_SOURCE do the right thing (or any other
  46  * -D_FOO_SOURCE feature test macro we support.)
  47  */
  48 static char     *args_prepended[] = {
  49         "-std=iso9899:199409",
  50         "-pedantic"
  51 };
  52
  53 static void     usage(void);
  54
  55 /*
  56  * Prepend the strings from args_prepended[] to the arg list; parse options,
  57  * accepting only the POSIX c89 mandated options. Then exec cc to do the
  58  * actual work.
  59  */
  60 int
  61 main(int argc, char **argv)
  62 {
  63         int Argc, i;
  64         char **Argv;
  65
  66         Argc = 0;
  67         Argv = malloc((argc + 1 + N_ARGS_PREPENDED) * sizeof *Argv);
  68         if (Argv == NULL)
  69                 err(1, "malloc");
  70         Argv[Argc++] = argv[0];
  71         for (i = 0; i < N_ARGS_PREPENDED; ++i)
  72                 Argv[Argc++] = args_prepended[i];
  73         while ((i = getopt(argc, argv, "cD:EgI:l:L:o:OsU:")) != -1) {
  74                 if (i == '?')
  75                         usage();
  76                 if (i == 'l') {
  77                         if (argv[optind - 1][0] == '-') /* -llib */
  78                                 optind -= 1;
  79                         else                            /* -l lib */
  80                                 optind -= 2;
  81                         break; /* -llib or -l lib starts the operands. */
  82                 }
  83         }
  84         if (argc == optind) {
  85                 warnx("missing operand");
  86                 usage();
  87         }
  88
  89         /* Append argv[1..] at the end of Argv[]. */
  90         for (i = 1; i <= argc; ++i)
  91                 Argv[Argc++] = argv[i];
  92         (void)execv(CC, Argv);
  93         err(1, "execv(" CC ")");
  94 }
  95
  96 static void
  97 usage(void)
  98 {
  99         fprintf(stderr,
 100 "usage: c89 [-c] [-D name[=value]] [...] [-E] [-g] [-I directory ...]\n"
 101 "       [-L directory ...] [-o outfile] [-O] [-s] [-U name ...] operand ...\n"
 102 "\n"
 103 "       where operand is one or more of file.c, file.o, file.a\n"
 104 "       or -llibrary\n");
 105         exit(1);
 106 }