The Tcpdump Group git mirrors - libpcap/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   #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