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 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <err.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 38 #include <unistd.h> 39 40 #define CC "/usr/bin/cc" /* The big kahuna doing the actual work. */ 41 #define N_ARGS_PREPENDED (sizeof(args_prepended) / sizeof(args_prepended[0])) 42 43 /* 44 * We do not add -D_POSIX_SOURCE here because any POSIX source is supposed to 45 * define it before inclusion of POSIX headers. This has the additional 46 * benefit of making c89 -D_ANSI_SOURCE do the right thing (or any other 47 * -D_FOO_SOURCE feature test macro we support.) 48 */ 49 static const char *args_prepended[] = { 50 "-std=iso9899:199409", 51 "-pedantic" 52 }; 53 54 static void usage(void); 55 56 /* 57 * Prepend the strings from args_prepended[] to the arg list; parse options, 58 * accepting only the POSIX c89 mandated options. Then exec cc to do the 59 * actual work. 60 */ 61 int 62 main(int argc, char **argv) 63 { 64 int Argc, i; 65 size_t j; 66 union { 67 const char **a; 68 char * const *b; 69 } Argv; 70 71 Argc = 0; 72 Argv.a = malloc((argc + 1 + N_ARGS_PREPENDED) * sizeof *Argv.a); 73 if (Argv.a == NULL) 74 err(1, "malloc"); 75 Argv.a[Argc++] = argv[0]; 76 for (j = 0; j < N_ARGS_PREPENDED; ++j) 77 Argv.a[Argc++] = args_prepended[j]; 78 while ((i = getopt(argc, argv, "cD:EgI:l:L:o:OsU:")) != -1) { 79 if (i == '?') 80 usage(); 81 if (i == 'l') { 82 if (argv[optind - 1][0] == '-') /* -llib */ 83 optind -= 1; 84 else /* -l lib */ 85 optind -= 2; 86 break; /* -llib or -l lib starts the operands. */ 87 } 88 } 89 if (argc == optind) { 90 warnx("missing operand"); 91 usage(); 92 } 93 94 /* Append argv[1..] at the end of Argv[].a. */ 95 for (i = 1; i <= argc; ++i) 96 Argv.a[Argc++] = argv[i]; 97 (void)execv(CC, Argv.b); 98 err(1, "execv(" CC ")"); 99 } 100 101 static void 102 usage(void) 103 { 104 fprintf(stderr, 105 "usage: c89 [-c] [-D name[=value]] [...] [-E] [-g] [-I directory ...]\n" 106 " [-L directory ...] [-o outfile] [-O] [-s] [-U name ...] operand ...\n" 107 "\n" 108 " where operand is one or more of file.c, file.o, file.a\n" 109 " or -llibrary\n"); 110 exit(1); 111 } 112