text: /*-
   * This is the Posix.2 mandated C compiler.  Basically, a hook to the
   * cc(1) command.
   *
   * Copyright (c) 2001 by Jens Schweikhardt
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.0/usr.bin/c89/c89.c 247951 2013-03-07 21:34:16Z dim $");
  
  #include <err.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include <unistd.h>
  
  #define	CC "/usr/bin/cc"	/* The big kahuna doing the actual work. */
  #define	N_ARGS_PREPENDED (sizeof(args_prepended) / sizeof(args_prepended[0]))
  
  /*
   * We do not add -D_POSIX_SOURCE here because any POSIX source is supposed to
   * define it before inclusion of POSIX headers. This has the additional
   * benefit of making c89 -D_ANSI_SOURCE do the right thing (or any other
   * -D_FOO_SOURCE feature test macro we support.)
   */
  static const char	*args_prepended[] = {
  	"-std=iso9899:199409",
  	"-pedantic"
  };
  
  static void	usage(void);
  
  /*
   * Prepend the strings from args_prepended[] to the arg list; parse options,
   * accepting only the POSIX c89 mandated options. Then exec cc to do the
   * actual work.
   */
  int
  main(int argc, char **argv)
  {
  	int Argc, i;
  	size_t j;
  	union {
  		const char **a;
  		char * const *b;
  	} Argv;
  
  	Argc = 0;
  	Argv.a = malloc((argc + 1 + N_ARGS_PREPENDED) * sizeof *Argv.a);
  	if (Argv.a == NULL)
  		err(1, "malloc");
  	Argv.a[Argc++] = CC;
  	for (j = 0; j < N_ARGS_PREPENDED; ++j)
  		Argv.a[Argc++] = args_prepended[j];
  	while ((i = getopt(argc, argv, "cD:EgI:l:L:o:OsU:")) != -1) {
  		if (i == '?')
  			usage();
  		if (i == 'l') {
  			if (argv[optind - 1][0] == '-') /* -llib */
  				optind -= 1;
  			else                            /* -l lib */
  				optind -= 2;
  			break; /* -llib or -l lib starts the operands. */
  		}
  	}
  	if (argc == optind) {
  		warnx("missing operand");
  		usage();
  	}
  
  	/* Append argv[1..] at the end of Argv[].a. */
  	for (i = 1; i <= argc; ++i)
  		Argv.a[Argc++] = argv[i];
  	(void)execv(CC, Argv.b);
  	err(1, "execv(" CC ")");
  }
  
  static void
  usage(void)
  {
  	fprintf(stderr,
  "usage: c89 [-cEgOs] [-D name[=value]] ... [-I directory] ... [-L directory] ...\n"
  "           [-o outfile] [-U name] ... operand ...\n"
  "\n"
  "       where operand is one or more of file.c, file.o, file.a\n"
  "       or -llibrary\n");
  	exit(1);
  }
  