libpcap  1.10.1
About: libpcap is a packet filter library used by tools like tcpdump.
  Fossies Dox: libpcap-1.10.1.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

ftmacros.h
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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 #else
87  /*
88  * Turn on _GNU_SOURCE to get everything GNU libc has to offer,
89  * including asprintf(), if we're using GNU libc.
90  *
91  * Unfortunately, one thing it has to offer is a strerror_r()
92  * that's not POSIX-compliant, but we deal with that in
93  * pcap_fmt_errmsg_for_errno().
94  *
95  * We don't limit this to, for example, Linux and Cygwin, because
96  * this might, for example, be GNU/HURD or one of Debian's kFreeBSD
97  * OSes ("GNU/FreeBSD").
98  */
99  #define _GNU_SOURCE
100 
101  /*
102  * We turn on both _DEFAULT_SOURCE and _BSD_SOURCE to try to get
103  * the BSD u_XXX types, such as u_int and u_short, defined. We
104  * define _DEFAULT_SOURCE first, so that newer versions of GNU libc
105  * don't whine about _BSD_SOURCE being deprecated; we still have
106  * to define _BSD_SOURCE to handle older versions of GNU libc that
107  * don't support _DEFAULT_SOURCE.
108  *
109  * But, if it's already defined, don't define it, so that we don't
110  * get a warning of it being redefined if it's defined as, for
111  * example, 1.
112  */
113  #ifndef _DEFAULT_SOURCE
114  #define _DEFAULT_SOURCE
115  #endif
116  /* Avoid redefining _BSD_SOURCE if it's already defined as for ex. 1 */
117  #ifndef _BSD_SOURCE
118  #define _BSD_SOURCE
119  #endif
120 #endif
121 
122 #endif