mirror of
https://github.com/the-tcpdump-group/tcpdump.git
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ac88cb08eb
The warning was like:
In file included from ./netdissect-stdinc.h:42,
from ./fptype.c:36:
./ftmacros.h:116: warning: "_BSD_SOURCE" redefined
116 | #define _BSD_SOURCE
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In file included from /usr/include/stdio.h:8,
from /usr/include/fortify/stdio.h:22,
from ./fptype.c:34:
/usr/include/features.h:15: note: this is the location of the previous
definition
15 | #define _BSD_SOURCE 1
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123 lines
4.7 KiB
C
123 lines
4.7 KiB
C
/*
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* Copyright (c) 1994, 1995, 1996
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef ftmacros_h
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#define ftmacros_h
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/*
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* Define some feature test macros to make sure that everything we want
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* to be declared gets declared.
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*
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* On some UN*Xes we need to force strtok_r() to be declared.
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* We do *NOT* want to define _POSIX_C_SOURCE, as that tends
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* to make non-POSIX APIs that we use unavailable.
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* XXX - is there no portable way to say "please pollute the
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* namespace to the maximum extent possible"?
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*/
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#if defined(sun) || defined(__sun)
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#define __EXTENSIONS__
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/*
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* We also need to define _XPG4_2 in order to get
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* the Single UNIX Specification version of
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* recvmsg().
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*/
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#define _XPG4_2
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#elif defined(_hpux) || defined(hpux) || defined(__hpux)
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#define _REENTRANT
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/*
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* We need this to get the versions of socket functions that
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* use socklen_t. Define it only if it's not already defined,
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* so we don't get redefiniton warnings.
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*/
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#ifndef _XOPEN_SOURCE_EXTENDED
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#define _XOPEN_SOURCE_EXTENDED
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#endif
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/*
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* XXX - the list of PA-RISC options for GCC makes it sound as if
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* building code that uses a particular vintage of UNIX API/ABI
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* is complicated:
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*
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* https://gcc.gnu.org/onlinedocs/gcc/HPPA-Options.html
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*
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* See the description of the -munix flag.
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*
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* We probably want libpcap to work with programs built for any
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* UN*X standard. I'm not sure whether that's possible and, if
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* it is, what sort of stuff it'd have to do.
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*
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* It might also be a requirement that we build with a special
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* flag to allow the library to be used with threaded code, at
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* least with HP's C compiler; hopefully doing so won't make it
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* *not* work with *un*-threaded code.
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*/
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#else
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/*
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* Turn on _GNU_SOURCE to get everything GNU libc has to offer,
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* including asprintf(), if we're using GNU libc.
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*
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* Unfortunately, one thing it has to offer is a strerror_r()
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* that's not POSIX-compliant, but we deal with that in
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* pcap_fmt_errmsg_for_errno().
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*
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* We don't limit this to, for example, Linux and Cygwin, because
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* this might, for example, be GNU/HURD or one of Debian's kFreeBSD
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* OSes ("GNU/FreeBSD").
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*/
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#define _GNU_SOURCE
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/*
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* We turn on both _DEFAULT_SOURCE and _BSD_SOURCE to try to get
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* the BSD u_XXX types, such as u_int and u_short, defined. We
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* define _DEFAULT_SOURCE first, so that newer versions of GNU libc
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* don't whine about _BSD_SOURCE being deprecated; we still have
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* to define _BSD_SOURCE to handle older versions of GNU libc that
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* don't support _DEFAULT_SOURCE.
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*
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* But, if it's already defined, don't define it, so that we don't
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* get a warning of it being redefined if it's defined as, for
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* example, 1.
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*/
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#ifndef _DEFAULT_SOURCE
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#define _DEFAULT_SOURCE
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#endif
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/* Avoid redefining _BSD_SOURCE if it's already defined as for ex. 1 */
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#ifndef _BSD_SOURCE
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#define _BSD_SOURCE
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#endif
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#endif
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#endif
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