1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * This is the Posix.2 mandated C compiler. Basically, a hook to the 5 * cc(1) command. 6 * 7 * Copyright (c) 2001 by Jens Schweikhardt 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <err.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 40 #include <unistd.h> 41 42 #define CC "/usr/bin/cc" /* The big kahuna doing the actual work. */ 43 #define N_ARGS_PREPENDED (sizeof(args_prepended) / sizeof(args_prepended[0])) 44 45 /* 46 * We do not add -D_POSIX_SOURCE here because any POSIX source is supposed to 47 * define it before inclusion of POSIX headers. This has the additional 48 * benefit of making c89 -D_ANSI_SOURCE do the right thing (or any other 49 * -D_FOO_SOURCE feature test macro we support.) 50 */ 51 static const char *args_prepended[] = { 52 "-std=iso9899:199409", 53 "-pedantic" 54 }; 55 56 static void usage(void); 57 58 /* 59 * Prepend the strings from args_prepended[] to the arg list; parse options, 60 * accepting only the POSIX c89 mandated options. Then exec cc to do the 61 * actual work. 62 */ 63 int 64 main(int argc, char **argv) 65 { 66 int Argc, i; 67 size_t j; 68 union { 69 const char **a; 70 char * const *b; 71 } Argv; 72 73 Argc = 0; 74 Argv.a = malloc((argc + 1 + N_ARGS_PREPENDED) * sizeof *Argv.a); 75 if (Argv.a == NULL) 76 err(1, "malloc"); 77 Argv.a[Argc++] = CC; 78 for (j = 0; j < N_ARGS_PREPENDED; ++j) 79 Argv.a[Argc++] = args_prepended[j]; 80 while ((i = getopt(argc, argv, "cD:EgI:l:L:o:OsU:")) != -1) { 81 if (i == '?') 82 usage(); 83 if (i == 'l') { 84 if (argv[optind - 1][0] == '-') /* -llib */ 85 optind -= 1; 86 else /* -l lib */ 87 optind -= 2; 88 break; /* -llib or -l lib starts the operands. */ 89 } 90 } 91 if (argc == optind) { 92 warnx("missing operand"); 93 usage(); 94 } 95 96 /* Append argv[1..] at the end of Argv[].a. */ 97 for (i = 1; i <= argc; ++i) 98 Argv.a[Argc++] = argv[i]; 99 (void)execv(CC, Argv.b); 100 err(1, "execv(" CC ")"); 101 } 102 103 static void 104 usage(void) 105 { 106 fprintf(stderr, 107 "usage: c89 [-cEgOs] [-D name[=value]] ... [-I directory] ... [-L directory] ...\n" 108 " [-o outfile] [-U name] ... operand ...\n" 109 "\n" 110 " where operand is one or more of file.c, file.o, file.a\n" 111 " or -llibrary\n"); 112 exit(1); 113 } 114