This also fixes configure-script problems on OSes that have IPv6 support
but don't have <netinet6/in6.h> - no standard I could find requires that
header for IPv6 support (the Single UNIX Specification speaks of
<netinet/in.h> for both IPv4 and IPv6, and RFCs 2292 and 3542 don't
mention <netinet6/in6.h>, just <netinet/in.h> and <netinet6/ip6.h>).
See section 11.6 "Shell Substitutions" in the autoconf documentation,
especially the
There is just no portable way to use double-quoted strings
inside double-quoted back-quoted expressions (pfew!).
part.
Rather than hardcode the WIN32 define, add proper fork checks to the
configure script and check those. This fixes building for nommu systems
which lack the fork function.
While we're here though, add support for this functionality via vfork
so that it does work on nommu systems. And fix an old bug where we
exit properly in the forked child when the exec failed instead of just
returning to the calling code (which isn't expecting it).
Reviewed-By: Guy Harris <guy@alum.mit.edu>
The PROG variant does not take into consideration cross-compilation, so
it always looks for "pcap-config" which finds the host script. So use
the TOOL variant instead which first searches for the cross-prefixed
pcap-config before falling back to the bare "pcap-config".
Reviewed-By: Guy Harris <guy@alum.mit.edu>
After finding libpcap and getting a list of other flags needed when
linking, we check for "pcap_loop()", to make sure we found a working
libpcap and have all the right other libraries with which dnl to link.
(Otherwise, for example, the check for pcap_list_datalinks() will fail,
not because the routines are missing from the library, but because we
aren't linking properly with libpcap, and that will cause confusing
errors at build time.)
Instead of requiring the user to specify -arch options on OS X to build
a universal version of tcpdump, just default to universal on OS X by
default. Pick the particular targets to match the way tcpdump is built
for the OS for which we're building.
They allow the user to specify flags to indicate the target
architecture(s) (yes, possibly plural - think, for example, Mac OS X)
for which we're building. Those might need to be used not only when
compiling, but also when linking and when building a shared library.
This is not for general cross-compiling, it's for use on platforms where
versions of the native OS support more than one instruction set and
where you want to build for the OS on which you're running but not for
the default build architecture on the machine on which you're running.
This may currently be less useful for tcpdump, as tcpdump currently
builds no libraries, but it's there for compatibility with libpcap.
tcpdump.
Check whether __attribute__((format)) can be applied to function
pointers and, if not, don't apply it to function pointers; some older
versions of GCC appear to support applying it to functions, but not
pointers to functions.
As we've gotten rid of missing/getaddrinfo.c, don't use it.
elsewhere in the macro.
For the Alpha C compiler, don't set -std1 unless it's necessary for ANSI
mode - we don't want to limit the compiler only to C89 features and,
more importantly, C89 headers (<inttypes.h> doesn't work, on at least
some versions of Digital UNIX and some C compiler versions, with -std1).
Remove unused items, and items for which we now have AC_DEFINE() calls
that supply a comment, from acconfig.h.
Note that a host OS that matches "osf*" is assumed to be DEC
OSF1/Digital UNIX/Tru64 UNIX.
use the V_CCOPT flags, because some of those might disable inlining;
otherwise, the test for inlining will succeed, but inlining won't work
with the options we're using when compiling.
on a system that comes with libpcap, to link with the system libpcap
even if, say, you've installed a newer libpcap under /usr/local and its
pcap-config added -L/usr/local/lib to LDFLAGS, as the -L/usr/lib comes
earlier in LDFLAGS. (For "would", read "did, when I tried it".)
script and, if we find it, query it to see what additional libraries are
needed to link with that library.
If we're not, check for a system pcap-config script and, if we find it,
query it to see what C compiler flags and linker flags are needed to
build with that library.
printed when trying to print packets for a DLT_ for which we don't have
a printer to indicate that you can still save to a capture file in that
case. (Slightly changed not to require DLT_USB_LINUX_MMAPPED to be
defined, for older libpcaps that only define DLT_USB_LINUX.)
Author: Peter Volkov <pva@gentoo.org>
Date: Sun Nov 9 20:33:27 2008 -0500
Currently it's impossible to build tcpdump without libsmi on system with
libsmi installed. The patch in attachment adds --with{,out}-smi
configure switch which allows to disable it.
with which it was released, and DLT_BLUETOOTH_HCI_H4_WITH_PHDR might be
defined by pcap-bpf.h without pcap/bluetooth.h being present (as appears
to be the case on Fedora 9, for example), so check whether
<pcap/bluetooth.h> is usable.
Update a comment - F9 appears to have a "/usr/include/pcap.h" if you
install the libpcap headers.
When adding -I flags when running a compiler-based test, add them to
CPPFLAGS, not CFLAGS - the latter doesn't work right with
AC_CHECK_HEADERS, as the "gcc -E" run doesn't have the -I flags added.
if it does, use that for the pf definitions;
if it doesn't, don't compile in pf support;
as both OpenBSD and FreeBSD have changed the pf definitions and header
format without changing the DLT value, so you can't reliably read
pflog-format libpcap files on a machine running an OS version other than
the one on which the file was generated.
and using ftell(); that won't necessarily work on Windows (if libpcap
was built with a different version of the C runtime library than tcpdump
is), and, even on UN*X, would break if a pcap_dumper_t * were ever made
something other than a FILE *.
Provide a pcap_dump_ftell() implementation that does that cheating cast
for use if libpcap doesn't have it (a pcap_dumper_t * is just a FILE *
on those older versions of libpcap).
AC_CHECK_DECLS will define the HAVE_DECL_xxx variable whether it
succeeds or fails, so you can't erase a "no" result and try
again with a different header. Use AC_CHECK_DECL, which doesn't
define HAVE_DECL_xxx, and then explicitly define it based on
whether we found a declaration or not.
is required for tcpdump's configure.in as well.
inline problem, and AC_LBL_C_INLINE checks for a case that some versions
of the HP C compiler don't handle, and only uses inline if that case
succeeds.
1. aclocal.m4 patch required by Tru64 UNIX which has
inttypes.h in a non-standard location so gcc cannot find
the PRI types. So, use <sys/bitypes.h> to get u_int#_t
types for help detecting %llx, etc.
2. Help gcc on aix find ether_ntohost declaration.
