1 /* 2 * Copyright (c) 1994, 1995, 1996 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the Computer Systems 16 * Engineering Group at Lawrence Berkeley Laboratory. 17 * 4. Neither the name of the University nor of the Laboratory may be used 18 * to endorse or promote products derived from this software without 19 * specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef ftmacros_h 35 #define ftmacros_h 36 37 /* 38 * Define some feature test macros to make sure that everything we want 39 * to be declared gets declared. 40 * 41 * On some UN*Xes we need to force strtok_r() to be declared. 42 * We do *NOT* want to define _POSIX_C_SOURCE, as that tends 43 * to make non-POSIX APIs that we use unavailable. 44 * XXX - is there no portable way to say "please pollute the 45 * namespace to the maximum extent possible"? 46 */ 47 #if defined(sun) || defined(__sun) 48 /* 49 * On Solaris Clang defines __EXTENSIONS__ automatically. 50 */ 51 #ifndef __EXTENSIONS__ 52 #define __EXTENSIONS__ 53 #endif 54 55 /* 56 * We also need to define _XPG4_2 in order to get 57 * the Single UNIX Specification version of 58 * recvmsg(). 59 */ 60 #define _XPG4_2 61 #elif defined(_hpux) || defined(hpux) || defined(__hpux) 62 #define _REENTRANT 63 64 /* 65 * We need this to get the versions of socket functions that 66 * use socklen_t. Define it only if it's not already defined, 67 * so we don't get redefiniton warnings. 68 */ 69 #ifndef _XOPEN_SOURCE_EXTENDED 70 #define _XOPEN_SOURCE_EXTENDED 71 #endif 72 73 /* 74 * XXX - the list of PA-RISC options for GCC makes it sound as if 75 * building code that uses a particular vintage of UNIX API/ABI 76 * is complicated: 77 * 78 * https://gcc.gnu.org/onlinedocs/gcc/HPPA-Options.html 79 * 80 * See the description of the -munix flag. 81 * 82 * We probably want libpcap to work with programs built for any 83 * UN*X standard. I'm not sure whether that's possible and, if 84 * it is, what sort of stuff it'd have to do. 85 * 86 * It might also be a requirement that we build with a special 87 * flag to allow the library to be used with threaded code, at 88 * least with HP's C compiler; hopefully doing so won't make it 89 * *not* work with *un*-threaded code. 90 */ 91 #else 92 /* 93 * Turn on _GNU_SOURCE to get everything GNU libc has to offer, 94 * including asprintf(), if we're using GNU libc. 95 * 96 * Unfortunately, one thing it has to offer is a strerror_r() 97 * that's not POSIX-compliant, but we deal with that in 98 * pcap_fmt_errmsg_for_errno(). 99 * 100 * We don't limit this to, for example, Linux and Cygwin, because 101 * this might, for example, be GNU/HURD or one of Debian's kFreeBSD 102 * OSes ("GNU/FreeBSD"). 103 */ 104 #define _GNU_SOURCE 105 106 /* 107 * We turn on both _DEFAULT_SOURCE and _BSD_SOURCE to try to get 108 * the BSD u_XXX types, such as u_int and u_short, defined. We 109 * define _DEFAULT_SOURCE first, so that newer versions of GNU libc 110 * don't whine about _BSD_SOURCE being deprecated; we still have 111 * to define _BSD_SOURCE to handle older versions of GNU libc that 112 * don't support _DEFAULT_SOURCE. 113 * 114 * But, if it's already defined, don't define it, so that we don't 115 * get a warning of it being redefined if it's defined as, for 116 * example, 1. 117 */ 118 #ifndef _DEFAULT_SOURCE 119 #define _DEFAULT_SOURCE 120 #endif 121 /* Avoid redefining _BSD_SOURCE if it's already defined as for ex. 1 */ 122 #ifndef _BSD_SOURCE 123 #define _BSD_SOURCE 124 #endif 125 #endif 126 127 #endif 128