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 #define __EXTENSIONS__ 49 50 /* 51 * We also need to define _XPG4_2 in order to get 52 * the Single UNIX Specification version of 53 * recvmsg(). 54 */ 55 #define _XPG4_2 56 #elif defined(_hpux) || defined(hpux) || defined(__hpux) 57 #define _REENTRANT 58 59 /* 60 * We need this to get the versions of socket functions that 61 * use socklen_t. Define it only if it's not already defined, 62 * so we don't get redefiniton warnings. 63 */ 64 #ifndef _XOPEN_SOURCE_EXTENDED 65 #define _XOPEN_SOURCE_EXTENDED 66 #endif 67 68 /* 69 * XXX - the list of PA-RISC options for GCC makes it sound as if 70 * building code that uses a particular vintage of UNIX API/ABI 71 * is complicated: 72 * 73 * https://gcc.gnu.org/onlinedocs/gcc/HPPA-Options.html 74 * 75 * See the description of the -munix flag. 76 * 77 * We probably want libpcap to work with programs built for any 78 * UN*X standard. I'm not sure whether that's possible and, if 79 * it is, what sort of stuff it'd have to do. 80 * 81 * It might also be a requirement that we build with a special 82 * flag to allow the library to be used with threaded code, at 83 * least with HP's C compiler; hopefully doing so won't make it 84 * *not* work with *un*-threaded code. 85 */ 86 #elif defined(__linux__) || defined(linux) || defined(__linux) 87 /* 88 * We can't turn _GNU_SOURCE on because some versions of GNU Libc 89 * will give the GNU version of strerror_r(), which returns a 90 * string pointer and doesn't necessarily fill in the buffer, 91 * rather than the standard version of strerror_r(), which 92 * returns 0 or an errno and always fills in the buffer. We 93 * require both of the latter behaviors. 94 * 95 * So we try turning everything else on that we can. This includes 96 * defining _XOPEN_SOURCE as 600, because we want to force crypt() 97 * to be declared on systems that use GNU libc, such as most Linux 98 * distributions. 99 */ 100 #define _POSIX_C_SOURCE 200809L 101 #define _XOPEN_SOURCE 600 102 103 /* 104 * We turn on both _DEFAULT_SOURCE and _BSD_SOURCE to try to get 105 * the BSD u_XXX types, such as u_int and u_short, defined. We 106 * define _DEFAULT_SOURCE first, so that newer versions of GNU libc 107 * don't whine about _BSD_SOURCE being deprecated; we still have 108 * to define _BSD_SOURCE to handle older versions of GNU libc that 109 * don't support _DEFAULT_SOURCE. 110 */ 111 #define _DEFAULT_SOURCE 112 #define _BSD_SOURCE 113 #endif 114 115 #endif 116