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If we're not building for Tru64 UNIX, we need only <stddef.h> to define
size_t and "varattrs.h" to define _U_.
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Include <stdio.h> on Digital/Tru64 UNIX to get snprintf(); we assume the
versions on which people will build this (if any) will have it. (1998
called, they want their C library back....)
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Some versions of the MSVC runtime library have a non-C99-compliant
vsnprintf(), which we want to avoid. On Windows, use snprintf() and
vsnprintf() for VS 2015 and later, where they both exist in
C99-compliant forms, and wrap _{v}snprintf_s() otherwise (they're
guaranteed to do the null termination that we want).
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This can prevent bizarre failures if, for example, you've done a
configuration in the top-level source directory, leaving behind one
config.h file, and then do an out-of-tree build in another directory,
with different configuration options. This way, we always pick up the
same config.h, in the build directory.
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Handle attributes for function pointers the same way we handle
attributes for functions, by explicitly checking for the compiler
version with #if rather than with a configure script check. That's one
fewer thing that, if you're not using autoconf, has to be done in some
other fashion.
While we're at it, put NORETURN in the right place to have it work with
Microsoft Visual Studio as well as various UN*X compilers.
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Get the full log via: git log --follow netdissect-stdinc.h
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It doesn't request byte misalignment repair, it requests that byte
misalignment kill the program with SIGBUS; on platforms that don't
support aligned loads, we should be fetching possibly-misaligned data
using some safe instruction sequence, not by doing misaligned loads and
relying on them to trap to the kernel and be (slowly) emulated.
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Remove lots of $Header's and a few $Id's that all belong to the former
CVS repository of tcpdump itself. These keywords have been frozen since
the migration to git in late 2008.
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Some versions of Sun C support __attribute__ but don't support the
"unused" or "format" attributes - they don't fail, but they whine a lot.
They also support the "noreturn" attribute, but don't allow it to be
applied to function pointers, only to functions.
Check whether they can be used without warnings, and use them only if
they can.
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appropriately, and that GNUmakefile and the MSVC++ project file define
it apppriately, as we do with libpcap, rather than defining it in
"interface.h".
Undo the rcsid-shuffling and addition of extra #includes, as we no
longer need to arrange that "interface.h" be included before using _U_
in an RCS ID or copyright.
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use "_U_" in the definitions of "rcsid[]", to eliminate
complaints about those variables being unused;
move the definitions after the include of "interface.h", or add
an include of "interface.h", so that "_U_" is defined.
Include "config.h" before including "tcpdump-stdinc.h" in
"missing/datalinks.c".
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unused-parameter problems reported by GCC. Add an _U_ tag to label
parameters as unused if the function is called through a pointer (so
that you can't change its signature by removing parameters) or if there
are unused parameters only because the function isn't complete.
Add some additional bounds checks the necessity for which was revealed
while cleaning up unused-parameter problems.
Make some routines static.
"lcp_print()", defined in "print-lcp.c", isn't called anywhere -
"print-ppp.c" has the code to dissect LCP. Get rid of "print-lcp.c".
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we don't get compiler warnings about it being undeclared.
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there seem to be couple of unsafe use of strcat and strcpy - we should
bring in strl{cat,cpy}.
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