The Tcpdump Group git mirrors - tcpdump/blob - ftmacros.h

   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 redefinition 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