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2 * Copyright (c) 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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11 * notice, this list of conditions and the following disclaimer in the
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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
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31 * SUCH DAMAGE.
34 #ifndef ftmacros_h
35 #define ftmacros_h
38 * Define some feature test macros to make sure that everything we want
39 * to be declared gets declared.
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"?
47 #if defined(sun) || defined(__sun)
48 #define __EXTENSIONS__
51 * We also need to define _XPG4_2 in order to get
52 * the Single UNIX Specification version of
53 * recvmsg().
55 #define _XPG4_2
56 #elif defined(_hpux) || defined(hpux) || defined(__hpux)
57 #define _REENTRANT
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.
64 #ifndef _XOPEN_SOURCE_EXTENDED
65 #define _XOPEN_SOURCE_EXTENDED
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:
73 * https://gcc.gnu.org/onlinedocs/gcc/HPPA-Options.html
75 * See the description of the -munix flag.
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.
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.
88 * Turn on _GNU_SOURCE to get everything GNU libc has to offer,
89 * including asprintf(), if we're using GNU libc.
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().
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").
99 #define _GNU_SOURCE
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.
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.
113 #ifndef _DEFAULT_SOURCE
114 #define _DEFAULT_SOURCE
116 /* Avoid redefining _BSD_SOURCE if it's already defined as for ex. 1 */
117 #ifndef _BSD_SOURCE
118 #define _BSD_SOURCE