mirror of
https://github.com/the-tcpdump-group/tcpdump.git
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3dc736d939
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.
1313 lines
39 KiB
Plaintext
1313 lines
39 KiB
Plaintext
dnl Copyright (c) 1995, 1996, 1997, 1998
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dnl The Regents of the University of California. All rights reserved.
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dnl
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dnl Redistribution and use in source and binary forms, with or without
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dnl modification, are permitted provided that: (1) source code distributions
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dnl retain the above copyright notice and this paragraph in its entirety, (2)
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dnl distributions including binary code include the above copyright notice and
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dnl this paragraph in its entirety in the documentation or other materials
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dnl provided with the distribution, and (3) all advertising materials mentioning
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dnl features or use of this software display the following acknowledgement:
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dnl ``This product includes software developed by the University of California,
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dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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dnl the University nor the names of its contributors may be used to endorse
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dnl or promote products derived from this software without specific prior
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dnl written permission.
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dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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dnl
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dnl LBL autoconf macros
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dnl
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dnl
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dnl Do whatever AC_LBL_C_INIT work is necessary before using AC_PROG_CC.
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dnl
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dnl It appears that newer versions of autoconf (2.64 and later) will,
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dnl if you use AC_TRY_COMPILE in a macro, stick AC_PROG_CC at the
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dnl beginning of the macro, even if the macro itself calls AC_PROG_CC.
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dnl See the "Prerequisite Macros" and "Expanded Before Required" sections
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dnl in the Autoconf documentation.
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dnl
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dnl This causes a steaming heap of fail in our case, as we were, in
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dnl AC_LBL_C_INIT, doing the tests we now do in AC_LBL_C_INIT_BEFORE_CC,
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dnl calling AC_PROG_CC, and then doing the tests we now do in
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dnl AC_LBL_C_INIT. Now, we run AC_LBL_C_INIT_BEFORE_CC, AC_PROG_CC,
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dnl and AC_LBL_C_INIT at the top level.
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dnl
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AC_DEFUN(AC_LBL_C_INIT_BEFORE_CC,
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[
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AC_BEFORE([$0], [AC_LBL_C_INIT])
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AC_BEFORE([$0], [AC_PROG_CC])
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AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
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AC_BEFORE([$0], [AC_LBL_DEVEL])
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AC_ARG_WITH(gcc, [ --without-gcc don't use gcc])
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$1=""
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if test "${srcdir}" != "." ; then
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$1="-I$srcdir"
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fi
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if test "${CFLAGS+set}" = set; then
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LBL_CFLAGS="$CFLAGS"
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fi
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if test -z "$CC" ; then
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case "$host_os" in
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bsdi*)
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AC_CHECK_PROG(SHLICC2, shlicc2, yes, no)
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if test $SHLICC2 = yes ; then
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CC=shlicc2
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export CC
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fi
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;;
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esac
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fi
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if test -z "$CC" -a "$with_gcc" = no ; then
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CC=cc
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export CC
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fi
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])
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dnl
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dnl Determine which compiler we're using (cc or gcc)
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dnl If using gcc, determine the version number
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dnl If using cc:
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dnl require that it support ansi prototypes
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dnl use -O (AC_PROG_CC will use -g -O2 on gcc, so we don't need to
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dnl do that ourselves for gcc)
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dnl add -g flags, as appropriate
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dnl explicitly specify /usr/local/include
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dnl
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dnl NOTE WELL: with newer versions of autoconf, "gcc" means any compiler
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dnl that defines __GNUC__, which means clang, for example, counts as "gcc".
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dnl
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dnl usage:
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dnl
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dnl AC_LBL_C_INIT(copt, incls)
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dnl
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dnl results:
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dnl
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dnl $1 (copt set)
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dnl $2 (incls set)
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dnl CC
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dnl LDFLAGS
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dnl LBL_CFLAGS
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dnl
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AC_DEFUN(AC_LBL_C_INIT,
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[
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AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
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AC_BEFORE([$0], [AC_LBL_DEVEL])
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AC_BEFORE([$0], [AC_LBL_SHLIBS_INIT])
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if test "$GCC" = yes ; then
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#
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# -Werror forces warnings to be errors.
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#
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ac_lbl_cc_force_warning_errors=-Werror
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#
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# Use -ffloat-store so that, on 32-bit x86, we don't
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# do 80-bit arithmetic with the FPU; that way we should
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# get the same results for floating-point calculations
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# on x86-32 and x86-64.
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#
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AC_LBL_CHECK_COMPILER_OPT($1, -ffloat-store)
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else
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$2="$$2 -I/usr/local/include"
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LDFLAGS="$LDFLAGS -L/usr/local/lib"
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case "$host_os" in
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darwin*)
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#
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# This is assumed either to be GCC or clang, both
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# of which use -Werror to force warnings to be errors.
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#
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ac_lbl_cc_force_warning_errors=-Werror
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;;
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hpux*)
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#
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# HP C, which is what we presume we're using, doesn't
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# exit with a non-zero exit status if we hand it an
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# invalid -W flag, can't be forced to do so even with
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# +We, and doesn't handle GCC-style -W flags, so we
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# don't want to try using GCC-style -W flags.
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#
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ac_lbl_cc_dont_try_gcc_dashW=yes
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;;
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irix*)
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#
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# MIPS C, which is what we presume we're using, doesn't
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# necessarily exit with a non-zero exit status if we
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# hand it an invalid -W flag, can't be forced to do
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# so, and doesn't handle GCC-style -W flags, so we
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# don't want to try using GCC-style -W flags.
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#
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ac_lbl_cc_dont_try_gcc_dashW=yes
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#
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# It also, apparently, defaults to "char" being
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# unsigned, unlike most other C implementations;
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# I suppose we could say "signed char" whenever
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# we want to guarantee a signed "char", but let's
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# just force signed chars.
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#
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# -xansi is normally the default, but the
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# configure script was setting it; perhaps -cckr
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# was the default in the Old Days. (Then again,
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# that would probably be for backwards compatibility
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# in the days when ANSI C was Shiny and New, i.e.
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# 1989 and the early '90's, so maybe we can just
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# drop support for those compilers.)
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#
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# -g is equivalent to -g2, which turns off
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# optimization; we choose -g3, which generates
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# debugging information but doesn't turn off
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# optimization (even if the optimization would
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# cause inaccuracies in debugging).
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#
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$1="$$1 -xansi -signed -g3"
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;;
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osf*)
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#
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# Presumed to be DEC OSF/1, Digital UNIX, or
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# Tru64 UNIX.
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#
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# The DEC C compiler, which is what we presume we're
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# using, doesn't exit with a non-zero exit status if we
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# hand it an invalid -W flag, can't be forced to do
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# so, and doesn't handle GCC-style -W flags, so we
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# don't want to try using GCC-style -W flags.
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#
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ac_lbl_cc_dont_try_gcc_dashW=yes
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#
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# -g is equivalent to -g2, which turns off
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# optimization; we choose -g3, which generates
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# debugging information but doesn't turn off
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# optimization (even if the optimization would
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# cause inaccuracies in debugging).
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#
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$1="$$1 -g3"
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;;
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solaris*)
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#
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# Assumed to be Sun C, which requires -errwarn to force
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# warnings to be treated as errors.
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#
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ac_lbl_cc_force_warning_errors=-errwarn
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;;
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ultrix*)
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AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes)
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AC_CACHE_VAL(ac_cv_lbl_cc_const_proto,
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AC_TRY_COMPILE(
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[#include <sys/types.h>],
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[struct a { int b; };
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void c(const struct a *)],
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ac_cv_lbl_cc_const_proto=yes,
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ac_cv_lbl_cc_const_proto=no))
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AC_MSG_RESULT($ac_cv_lbl_cc_const_proto)
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if test $ac_cv_lbl_cc_const_proto = no ; then
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AC_DEFINE(const,[],
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[to handle Ultrix compilers that don't support const in prototypes])
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fi
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;;
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esac
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$1="$$1 -O"
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fi
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])
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dnl
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dnl Check whether, if you pass an unknown warning option to the
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dnl compiler, it fails or just prints a warning message and succeeds.
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dnl Set ac_lbl_unknown_warning_option_error to the appropriate flag
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dnl to force an error if it would otherwise just print a warning message
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dnl and succeed.
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dnl
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AC_DEFUN(AC_LBL_CHECK_UNKNOWN_WARNING_OPTION_ERROR,
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[
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AC_MSG_CHECKING([whether the compiler fails when given an unknown warning option])
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Wxyzzy-this-will-never-succeed-xyzzy"
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AC_TRY_COMPILE(
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[],
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[return 0],
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[
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AC_MSG_RESULT([no])
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#
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# We're assuming this is clang, where
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# -Werror=unknown-warning-option is the appropriate
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# option to force the compiler to fail.
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#
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ac_lbl_unknown_warning_option_error="-Werror=unknown-warning-option"
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],
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[
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AC_MSG_RESULT([yes])
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])
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CFLAGS="$save_CFLAGS"
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])
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dnl
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dnl Check whether the compiler option specified as the second argument
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dnl is supported by the compiler and, if so, add it to the macro
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dnl specified as the first argument
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dnl
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AC_DEFUN(AC_LBL_CHECK_COMPILER_OPT,
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[
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AC_MSG_CHECKING([whether the compiler supports the $2 option])
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save_CFLAGS="$CFLAGS"
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if expr "x$2" : "x-W.*" >/dev/null
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then
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CFLAGS="$CFLAGS $ac_lbl_unknown_warning_option_error $2"
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elif expr "x$2" : "x-f.*" >/dev/null
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then
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CFLAGS="$CFLAGS -Werror $2"
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elif expr "x$2" : "x-m.*" >/dev/null
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then
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CFLAGS="$CFLAGS -Werror $2"
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else
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CFLAGS="$CFLAGS $2"
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fi
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AC_TRY_COMPILE(
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[],
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[return 0],
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[
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AC_MSG_RESULT([yes])
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CFLAGS="$save_CFLAGS"
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$1="$$1 $2"
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],
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[
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AC_MSG_RESULT([no])
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CFLAGS="$save_CFLAGS"
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])
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])
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dnl
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dnl Check whether the compiler supports an option to generate
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dnl Makefile-style dependency lines
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dnl
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dnl GCC uses -M for this. Non-GCC compilers that support this
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dnl use a variety of flags, including but not limited to -M.
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dnl
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dnl We test whether the flag in question is supported, as older
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dnl versions of compilers might not support it.
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dnl
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dnl We don't try all the possible flags, just in case some flag means
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dnl "generate dependencies" on one compiler but means something else
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dnl on another compiler.
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dnl
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dnl Most compilers that support this send the output to the standard
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dnl output by default. IBM's XLC, however, supports -M but sends
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dnl the output to {sourcefile-basename}.u, and AIX has no /dev/stdout
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dnl to work around that, so we don't bother with XLC.
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dnl
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AC_DEFUN(AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT,
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[
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AC_MSG_CHECKING([whether the compiler supports generating dependencies])
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if test "$GCC" = yes ; then
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#
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# GCC, or a compiler deemed to be GCC by AC_PROG_CC (even
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# though it's not); we assume that, in this case, the flag
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# would be -M.
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#
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ac_lbl_dependency_flag="-M"
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else
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#
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# Not GCC or a compiler deemed to be GCC; what platform is
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# this? (We're assuming that if the compiler isn't GCC
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# it's the compiler from the vendor of the OS; that won't
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# necessarily be true for x86 platforms, where it might be
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# the Intel C compiler.)
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#
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case "$host_os" in
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irix*|osf*|darwin*)
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#
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# MIPS C for IRIX, DEC C, and clang all use -M.
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#
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ac_lbl_dependency_flag="-M"
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;;
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solaris*)
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#
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# Sun C uses -xM.
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#
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ac_lbl_dependency_flag="-xM"
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;;
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hpux*)
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#
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# HP's older C compilers don't support this.
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# HP's newer C compilers support this with
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# either +M or +Make; the older compilers
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# interpret +M as something completely
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# different, so we use +Make so we don't
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# think it works with the older compilers.
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#
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ac_lbl_dependency_flag="+Make"
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;;
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*)
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#
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# Not one of the above; assume no support for
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# generating dependencies.
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#
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ac_lbl_dependency_flag=""
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;;
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esac
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fi
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#
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# Is ac_lbl_dependency_flag defined and, if so, does the compiler
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# complain about it?
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#
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# Note: clang doesn't seem to exit with an error status when handed
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# an unknown non-warning error, even if you pass it
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# -Werror=unknown-warning-option. However, it always supports
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# -M, so the fact that this test always succeeds with clang
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# isn't an issue.
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#
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if test ! -z "$ac_lbl_dependency_flag"; then
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AC_LANG_CONFTEST(
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[AC_LANG_SOURCE([[int main(void) { return 0; }]])])
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echo "$CC" $ac_lbl_dependency_flag conftest.c >&5
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if "$CC" $ac_lbl_dependency_flag conftest.c >/dev/null 2>&1; then
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AC_MSG_RESULT([yes, with $ac_lbl_dependency_flag])
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DEPENDENCY_CFLAG="$ac_lbl_dependency_flag"
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MKDEP='${srcdir}/mkdep'
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else
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AC_MSG_RESULT([no])
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#
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# We can't run mkdep, so have "make depend" do
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# nothing.
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#
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MKDEP=:
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fi
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rm -rf conftest*
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else
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AC_MSG_RESULT([no])
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#
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# We can't run mkdep, so have "make depend" do
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# nothing.
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#
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MKDEP=:
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fi
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AC_SUBST(DEPENDENCY_CFLAG)
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AC_SUBST(MKDEP)
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])
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|
|
#
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# Try compiling a sample of the type of code that appears in
|
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# gencode.c with "inline", "__inline__", and "__inline".
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#
|
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# Autoconf's AC_C_INLINE, at least in autoconf 2.13, isn't good enough,
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# as it just tests whether a function returning "int" can be inlined;
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# at least some versions of HP's C compiler can inline that, but can't
|
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# inline a function that returns a struct pointer.
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#
|
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# Make sure we use the V_CCOPT flags, because some of those might
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# disable inlining.
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#
|
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AC_DEFUN(AC_LBL_C_INLINE,
|
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[AC_MSG_CHECKING(for inline)
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save_CFLAGS="$CFLAGS"
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CFLAGS="$V_CCOPT"
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AC_CACHE_VAL(ac_cv_lbl_inline, [
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ac_cv_lbl_inline=""
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ac_lbl_cc_inline=no
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for ac_lbl_inline in inline __inline__ __inline
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do
|
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AC_TRY_COMPILE(
|
|
[#define inline $ac_lbl_inline
|
|
static inline struct iltest *foo(void);
|
|
struct iltest {
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int iltest1;
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int iltest2;
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};
|
|
|
|
static inline struct iltest *
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foo()
|
|
{
|
|
static struct iltest xxx;
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|
|
return &xxx;
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}],,ac_lbl_cc_inline=yes,)
|
|
if test "$ac_lbl_cc_inline" = yes ; then
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break;
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fi
|
|
done
|
|
if test "$ac_lbl_cc_inline" = yes ; then
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ac_cv_lbl_inline=$ac_lbl_inline
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fi])
|
|
CFLAGS="$save_CFLAGS"
|
|
if test ! -z "$ac_cv_lbl_inline" ; then
|
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AC_MSG_RESULT($ac_cv_lbl_inline)
|
|
else
|
|
AC_MSG_RESULT(no)
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|
fi
|
|
AC_DEFINE_UNQUOTED(inline, $ac_cv_lbl_inline, [Define as token for inline if inlining supported])])
|
|
|
|
dnl
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dnl Use pfopen.c if available and pfopen() not in standard libraries
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|
dnl Require libpcap
|
|
dnl Look for libpcap in ..
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dnl Use the installed libpcap if there is no local version
|
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dnl
|
|
dnl usage:
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dnl
|
|
dnl AC_LBL_LIBPCAP(pcapdep, incls)
|
|
dnl
|
|
dnl results:
|
|
dnl
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|
dnl $1 (pcapdep set)
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|
dnl $2 (incls appended)
|
|
dnl LIBS
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dnl LBL_LIBS
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dnl
|
|
AC_DEFUN(AC_LBL_LIBPCAP,
|
|
[AC_REQUIRE([AC_LBL_LIBRARY_NET])
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dnl
|
|
dnl save a copy before locating libpcap.a
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dnl
|
|
LBL_LIBS="$LIBS"
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pfopen=/usr/examples/packetfilter/pfopen.c
|
|
if test -f $pfopen ; then
|
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AC_CHECK_FUNCS(pfopen)
|
|
if test $ac_cv_func_pfopen = "no" ; then
|
|
AC_MSG_RESULT(Using $pfopen)
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|
LIBS="$LIBS $pfopen"
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fi
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|
fi
|
|
libpcap=FAIL
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AC_MSG_CHECKING(for local pcap library)
|
|
AC_ARG_WITH([system-libpcap],
|
|
[AS_HELP_STRING([--with-system-libpcap], [don't use local pcap library])])
|
|
if test "x$with_system_libpcap" != xyes ; then
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lastdir=FAIL
|
|
places=`ls $srcdir/.. | sed -e 's,/$,,' -e "s,^,$srcdir/../," | \
|
|
egrep '/libpcap-[[0-9]]+\.[[0-9]]+(\.[[0-9]]*)?([[ab]][[0-9]]*|-PRE-GIT)?$'`
|
|
places2=`ls .. | sed -e 's,/$,,' -e "s,^,../," | \
|
|
egrep '/libpcap-[[0-9]]+\.[[0-9]]+(\.[[0-9]]*)?([[ab]][[0-9]]*|-PRE-GIT)?$'`
|
|
for dir in $places $srcdir/../libpcap ../libpcap $srcdir/libpcap $places2 ; do
|
|
basedir=`echo $dir | sed -e 's/[[ab]][[0-9]]*$//' | \
|
|
sed -e 's/-PRE-GIT$//' `
|
|
if test $lastdir = $basedir ; then
|
|
dnl skip alphas when an actual release is present
|
|
continue;
|
|
fi
|
|
lastdir=$dir
|
|
if test -r $dir/libpcap.a ; then
|
|
libpcap=$dir/libpcap.a
|
|
d=$dir
|
|
dnl continue and select the last one that exists
|
|
fi
|
|
done
|
|
fi
|
|
if test $libpcap = FAIL ; then
|
|
AC_MSG_RESULT(not found)
|
|
|
|
#
|
|
# Look for pcap-config.
|
|
#
|
|
AC_PATH_TOOL(PCAP_CONFIG, pcap-config)
|
|
if test -n "$PCAP_CONFIG" ; then
|
|
#
|
|
# Found - use it to get the include flags for
|
|
# libpcap and the flags to link with libpcap.
|
|
#
|
|
# Please read section 11.6 "Shell Substitutions"
|
|
# in the autoconf manual before doing anything
|
|
# to this that involves quoting. Especially note
|
|
# the statement "There is just no portable way to use
|
|
# double-quoted strings inside double-quoted back-quoted
|
|
# expressions (pfew!)."
|
|
#
|
|
cflags=`"$PCAP_CONFIG" --cflags`
|
|
$2="$cflags $$2"
|
|
libpcap=`"$PCAP_CONFIG" --libs`
|
|
else
|
|
#
|
|
# Not found; look for pcap.
|
|
#
|
|
AC_CHECK_LIB(pcap, main, libpcap="-lpcap")
|
|
if test $libpcap = FAIL ; then
|
|
AC_MSG_ERROR(see the INSTALL doc for more info)
|
|
fi
|
|
dnl
|
|
dnl Some versions of Red Hat Linux put "pcap.h" in
|
|
dnl "/usr/include/pcap"; had the LBL folks done so,
|
|
dnl that would have been a good idea, but for
|
|
dnl the Red Hat folks to do so just breaks source
|
|
dnl compatibility with other systems.
|
|
dnl
|
|
dnl We work around this by assuming that, as we didn't
|
|
dnl find a local libpcap, libpcap is in /usr/lib or
|
|
dnl /usr/local/lib and that the corresponding header
|
|
dnl file is under one of those directories; if we don't
|
|
dnl find it in either of those directories, we check to
|
|
dnl see if it's in a "pcap" subdirectory of them and,
|
|
dnl if so, add that subdirectory to the "-I" list.
|
|
dnl
|
|
dnl (We now also put pcap.h in /usr/include/pcap, but we
|
|
dnl leave behind a /usr/include/pcap.h that includes it,
|
|
dnl so you can still just include <pcap.h>.)
|
|
dnl
|
|
AC_MSG_CHECKING(for extraneous pcap header directories)
|
|
if test \( ! -r /usr/local/include/pcap.h \) -a \
|
|
\( ! -r /usr/include/pcap.h \); then
|
|
if test -r /usr/local/include/pcap/pcap.h; then
|
|
d="/usr/local/include/pcap"
|
|
elif test -r /usr/include/pcap/pcap.h; then
|
|
d="/usr/include/pcap"
|
|
fi
|
|
fi
|
|
if test -z "$d" ; then
|
|
AC_MSG_RESULT(not found)
|
|
else
|
|
$2="-I$d $$2"
|
|
AC_MSG_RESULT(found -- -I$d added)
|
|
fi
|
|
fi
|
|
else
|
|
$1=$libpcap
|
|
places=`ls $srcdir/.. | sed -e 's,/$,,' -e "s,^,$srcdir/../," | \
|
|
egrep '/libpcap-[[0-9]]*.[[0-9]]*(.[[0-9]]*)?([[ab]][[0-9]]*)?$'`
|
|
places2=`ls .. | sed -e 's,/$,,' -e "s,^,../," | \
|
|
egrep '/libpcap-[[0-9]]*.[[0-9]]*(.[[0-9]]*)?([[ab]][[0-9]]*)?$'`
|
|
pcapH=FAIL
|
|
if test -r $d/pcap.h; then
|
|
pcapH=$d
|
|
else
|
|
for dir in $places $srcdir/../libpcap ../libpcap $srcdir/libpcap $places2 ; do
|
|
if test -r $dir/pcap.h ; then
|
|
pcapH=$dir
|
|
fi
|
|
done
|
|
fi
|
|
|
|
if test $pcapH = FAIL ; then
|
|
AC_MSG_ERROR(cannot find pcap.h: see INSTALL)
|
|
fi
|
|
$2="-I$pcapH $$2"
|
|
AC_MSG_RESULT($libpcap)
|
|
AC_PATH_PROG(PCAP_CONFIG, pcap-config,, $d)
|
|
if test -n "$PCAP_CONFIG"; then
|
|
#
|
|
# The libpcap directory has a pcap-config script.
|
|
# Use it to get any additioal libraries needed
|
|
# to link with the libpcap archive library in
|
|
# that directory.
|
|
#
|
|
# Please read section 11.6 "Shell Substitutions"
|
|
# in the autoconf manual before doing anything
|
|
# to this that involves quoting. Especially note
|
|
# the statement "There is just no portable way to use
|
|
# double-quoted strings inside double-quoted back-quoted
|
|
# expressions (pfew!)."
|
|
#
|
|
additional_libs=`"$PCAP_CONFIG" --additional-libs --static`
|
|
libpcap="$libpcap $additional_libs"
|
|
fi
|
|
fi
|
|
LIBS="$libpcap $LIBS"
|
|
if ! test -n "$PCAP_CONFIG" ; then
|
|
#
|
|
# We don't have pcap-config; find out any additional link flags
|
|
# we need. (If we have pcap-config, we assume it tells us what
|
|
# we need.)
|
|
#
|
|
case "$host_os" in
|
|
|
|
aix*)
|
|
#
|
|
# If libpcap is DLPI-based, we have to use /lib/pse.exp if
|
|
# present, as we use the STREAMS routines.
|
|
#
|
|
# (XXX - true only if we're linking with a static libpcap?)
|
|
#
|
|
pseexe="/lib/pse.exp"
|
|
AC_MSG_CHECKING(for $pseexe)
|
|
if test -f $pseexe ; then
|
|
AC_MSG_RESULT(yes)
|
|
LIBS="$LIBS -I:$pseexe"
|
|
fi
|
|
|
|
#
|
|
# If libpcap is BPF-based, we need "-lodm" and "-lcfg", as
|
|
# we use them to load the BPF module.
|
|
#
|
|
# (XXX - true only if we're linking with a static libpcap?)
|
|
#
|
|
LIBS="$LIBS -lodm -lcfg"
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
dnl
|
|
dnl Check for "pcap_loop()", to make sure we found a working
|
|
dnl libpcap and have all the right other libraries with which
|
|
dnl to link. (Otherwise, the checks below will fail, not
|
|
dnl because the routines are missing from the library, but
|
|
dnl because we aren't linking properly with libpcap, and
|
|
dnl that will cause confusing errors at build time.)
|
|
dnl
|
|
AC_CHECK_FUNC(pcap_loop,,
|
|
[
|
|
AC_MSG_ERROR(
|
|
[This is a bug, please follow the guidelines in CONTRIBUTING and include the
|
|
config.log file in your report. If you have downloaded libpcap from
|
|
tcpdump.org, and built it yourself, please also include the config.log
|
|
file from the libpcap source directory, the Makefile from the libpcap
|
|
source directory, and the output of the make process for libpcap, as
|
|
this could be a problem with the libpcap that was built, and we will
|
|
not be able to determine why this is happening, and thus will not be
|
|
able to fix it, without that information, as we have not been able to
|
|
reproduce this problem ourselves.])
|
|
])
|
|
])
|
|
|
|
dnl
|
|
dnl Define RETSIGTYPE and RETSIGVAL
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_TYPE_SIGNAL
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl RETSIGTYPE (defined)
|
|
dnl RETSIGVAL (defined)
|
|
dnl
|
|
AC_DEFUN(AC_LBL_TYPE_SIGNAL,
|
|
[AC_BEFORE([$0], [AC_LBL_LIBPCAP])
|
|
AC_TYPE_SIGNAL
|
|
if test "$ac_cv_type_signal" = void ; then
|
|
AC_DEFINE(RETSIGVAL,[],[return value of signal handlers])
|
|
else
|
|
AC_DEFINE(RETSIGVAL,(0),[return value of signal handlers])
|
|
fi
|
|
case "$host_os" in
|
|
|
|
irix*)
|
|
AC_DEFINE(_BSD_SIGNALS,1,[get BSD semantics on Irix])
|
|
;;
|
|
|
|
*)
|
|
dnl prefer sigaction() to sigset()
|
|
AC_CHECK_FUNCS(sigaction)
|
|
if test $ac_cv_func_sigaction = no ; then
|
|
AC_CHECK_FUNCS(sigset)
|
|
fi
|
|
;;
|
|
esac])
|
|
|
|
dnl
|
|
dnl If using gcc, make sure we have ANSI ioctl definitions
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_FIXINCLUDES
|
|
dnl
|
|
AC_DEFUN(AC_LBL_FIXINCLUDES,
|
|
[if test "$GCC" = yes ; then
|
|
AC_MSG_CHECKING(for ANSI ioctl definitions)
|
|
AC_CACHE_VAL(ac_cv_lbl_gcc_fixincludes,
|
|
AC_TRY_COMPILE(
|
|
[/*
|
|
* This generates a "duplicate case value" when fixincludes
|
|
* has not be run.
|
|
*/
|
|
# include <sys/types.h>
|
|
# include <sys/time.h>
|
|
# include <sys/ioctl.h>
|
|
# ifdef HAVE_SYS_IOCCOM_H
|
|
# include <sys/ioccom.h>
|
|
# endif],
|
|
[switch (0) {
|
|
case _IO('A', 1):;
|
|
case _IO('B', 1):;
|
|
}],
|
|
ac_cv_lbl_gcc_fixincludes=yes,
|
|
ac_cv_lbl_gcc_fixincludes=no))
|
|
AC_MSG_RESULT($ac_cv_lbl_gcc_fixincludes)
|
|
if test $ac_cv_lbl_gcc_fixincludes = no ; then
|
|
# Don't cache failure
|
|
unset ac_cv_lbl_gcc_fixincludes
|
|
AC_MSG_ERROR(see the INSTALL for more info)
|
|
fi
|
|
fi])
|
|
|
|
dnl
|
|
dnl Checks to see if union wait is used with WEXITSTATUS()
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_UNION_WAIT
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl DECLWAITSTATUS (defined)
|
|
dnl
|
|
AC_DEFUN(AC_LBL_UNION_WAIT,
|
|
[AC_MSG_CHECKING(if union wait is used)
|
|
AC_CACHE_VAL(ac_cv_lbl_union_wait,
|
|
AC_TRY_COMPILE([
|
|
# include <sys/types.h>
|
|
# include <sys/wait.h>],
|
|
[int status;
|
|
u_int i = WEXITSTATUS(status);
|
|
u_int j = waitpid(0, &status, 0);],
|
|
ac_cv_lbl_union_wait=no,
|
|
ac_cv_lbl_union_wait=yes))
|
|
AC_MSG_RESULT($ac_cv_lbl_union_wait)
|
|
if test $ac_cv_lbl_union_wait = yes ; then
|
|
AC_DEFINE(DECLWAITSTATUS,union wait,[type for wait])
|
|
else
|
|
AC_DEFINE(DECLWAITSTATUS,int,[type for wait])
|
|
fi])
|
|
|
|
dnl
|
|
dnl Checks to see if the sockaddr struct has the 4.4 BSD sa_len member
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_SOCKADDR_SA_LEN
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl HAVE_SOCKADDR_SA_LEN (defined)
|
|
dnl
|
|
AC_DEFUN(AC_LBL_SOCKADDR_SA_LEN,
|
|
[AC_MSG_CHECKING(if sockaddr struct has the sa_len member)
|
|
AC_CACHE_VAL(ac_cv_lbl_sockaddr_has_sa_len,
|
|
AC_TRY_COMPILE([
|
|
# include <sys/types.h>
|
|
# include <sys/socket.h>],
|
|
[u_int i = sizeof(((struct sockaddr *)0)->sa_len)],
|
|
ac_cv_lbl_sockaddr_has_sa_len=yes,
|
|
ac_cv_lbl_sockaddr_has_sa_len=no))
|
|
AC_MSG_RESULT($ac_cv_lbl_sockaddr_has_sa_len)
|
|
if test $ac_cv_lbl_sockaddr_has_sa_len = yes ; then
|
|
AC_DEFINE(HAVE_SOCKADDR_SA_LEN,1,[if struct sockaddr has the sa_len member])
|
|
fi])
|
|
|
|
dnl
|
|
dnl Checks to see if -R is used
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_HAVE_RUN_PATH
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl ac_cv_lbl_have_run_path (yes or no)
|
|
dnl
|
|
AC_DEFUN(AC_LBL_HAVE_RUN_PATH,
|
|
[AC_MSG_CHECKING(for ${CC-cc} -R)
|
|
AC_CACHE_VAL(ac_cv_lbl_have_run_path,
|
|
[echo 'main(){}' > conftest.c
|
|
${CC-cc} -o conftest conftest.c -R/a1/b2/c3 >conftest.out 2>&1
|
|
if test ! -s conftest.out ; then
|
|
ac_cv_lbl_have_run_path=yes
|
|
else
|
|
ac_cv_lbl_have_run_path=no
|
|
fi
|
|
rm -f -r conftest*])
|
|
AC_MSG_RESULT($ac_cv_lbl_have_run_path)
|
|
])
|
|
|
|
dnl
|
|
dnl Check whether a given format can be used to print 64-bit integers
|
|
dnl
|
|
AC_DEFUN(AC_LBL_CHECK_64BIT_FORMAT,
|
|
[
|
|
AC_MSG_CHECKING([whether %$1x can be used to format 64-bit integers])
|
|
AC_RUN_IFELSE(
|
|
[
|
|
AC_LANG_SOURCE(
|
|
[[
|
|
# ifdef HAVE_INTTYPES_H
|
|
#include <inttypes.h>
|
|
# endif
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
|
|
main()
|
|
{
|
|
uint64_t t = 1;
|
|
char strbuf[16+1];
|
|
sprintf(strbuf, "%016$1x", t << 32);
|
|
if (strcmp(strbuf, "0000000100000000") == 0)
|
|
exit(0);
|
|
else
|
|
exit(1);
|
|
}
|
|
]])
|
|
],
|
|
[
|
|
AC_DEFINE(PRId64, "$1d", [define if the platform doesn't define PRId64])
|
|
AC_DEFINE(PRIo64, "$1o", [define if the platform doesn't define PRIo64])
|
|
AC_DEFINE(PRIx64, "$1x", [define if the platform doesn't define PRIu64])
|
|
AC_DEFINE(PRIu64, "$1u", [define if the platform doesn't define PRIx64])
|
|
AC_MSG_RESULT(yes)
|
|
],
|
|
[
|
|
AC_MSG_RESULT(no)
|
|
$2
|
|
])
|
|
])
|
|
|
|
dnl
|
|
dnl Checks to see if unaligned memory accesses fail
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_UNALIGNED_ACCESS
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl LBL_ALIGN (DEFINED)
|
|
dnl
|
|
AC_DEFUN(AC_LBL_UNALIGNED_ACCESS,
|
|
[AC_MSG_CHECKING(if unaligned accesses fail)
|
|
AC_CACHE_VAL(ac_cv_lbl_unaligned_fail,
|
|
[case "$host_cpu" in
|
|
|
|
#
|
|
# These are CPU types where:
|
|
#
|
|
# the CPU faults on an unaligned access, but at least some
|
|
# OSes that support that CPU catch the fault and simulate
|
|
# the unaligned access (e.g., Alpha/{Digital,Tru64} UNIX) -
|
|
# the simulation is slow, so we don't want to use it;
|
|
#
|
|
# the CPU, I infer (from the old
|
|
#
|
|
# XXX: should also check that they don't do weird things (like on arm)
|
|
#
|
|
# comment) doesn't fault on unaligned accesses, but doesn't
|
|
# do a normal unaligned fetch, either (e.g., presumably, ARM);
|
|
#
|
|
# for whatever reason, the test program doesn't work
|
|
# (this has been claimed to be the case for several of those
|
|
# CPUs - I don't know what the problem is; the problem
|
|
# was reported as "the test program dumps core" for SuperH,
|
|
# but that's what the test program is *supposed* to do -
|
|
# it dumps core before it writes anything, so the test
|
|
# for an empty output file should find an empty output
|
|
# file and conclude that unaligned accesses don't work).
|
|
#
|
|
# This run-time test won't work if you're cross-compiling, so
|
|
# in order to support cross-compiling for a particular CPU,
|
|
# we have to wire in the list of CPU types anyway, as far as
|
|
# I know, so perhaps we should just have a set of CPUs on
|
|
# which we know it doesn't work, a set of CPUs on which we
|
|
# know it does work, and have the script just fail on other
|
|
# cpu types and update it when such a failure occurs.
|
|
#
|
|
alpha*|arm*|bfin*|hp*|mips*|sh*|sparc*|ia64|nv1)
|
|
ac_cv_lbl_unaligned_fail=yes
|
|
;;
|
|
|
|
*)
|
|
cat >conftest.c <<EOF
|
|
# include <sys/types.h>
|
|
# include <sys/wait.h>
|
|
# include <stdio.h>
|
|
unsigned char a[[5]] = { 1, 2, 3, 4, 5 };
|
|
main() {
|
|
unsigned int i;
|
|
pid_t pid;
|
|
int status;
|
|
/* avoid "core dumped" message */
|
|
pid = fork();
|
|
if (pid < 0)
|
|
exit(2);
|
|
if (pid > 0) {
|
|
/* parent */
|
|
pid = waitpid(pid, &status, 0);
|
|
if (pid < 0)
|
|
exit(3);
|
|
exit(!WIFEXITED(status));
|
|
}
|
|
/* child */
|
|
i = *(unsigned int *)&a[[1]];
|
|
printf("%d\n", i);
|
|
exit(0);
|
|
}
|
|
EOF
|
|
${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS \
|
|
conftest.c $LIBS >/dev/null 2>&1
|
|
if test ! -x conftest ; then
|
|
dnl failed to compile for some reason
|
|
ac_cv_lbl_unaligned_fail=yes
|
|
else
|
|
./conftest >conftest.out
|
|
if test ! -s conftest.out ; then
|
|
ac_cv_lbl_unaligned_fail=yes
|
|
else
|
|
ac_cv_lbl_unaligned_fail=no
|
|
fi
|
|
fi
|
|
rm -f -r conftest* core core.conftest
|
|
;;
|
|
esac])
|
|
AC_MSG_RESULT($ac_cv_lbl_unaligned_fail)
|
|
if test $ac_cv_lbl_unaligned_fail = yes ; then
|
|
AC_DEFINE(LBL_ALIGN,1,[if unaligned access fails])
|
|
fi])
|
|
|
|
dnl
|
|
dnl If the file .devel exists:
|
|
dnl Add some warning flags if the compiler supports them
|
|
dnl If an os prototype include exists, symlink os-proto.h to it
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_DEVEL(copt)
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl $1 (copt appended)
|
|
dnl HAVE_OS_PROTO_H (defined)
|
|
dnl os-proto.h (symlinked)
|
|
dnl
|
|
AC_DEFUN(AC_LBL_DEVEL,
|
|
[rm -f os-proto.h
|
|
if test "${LBL_CFLAGS+set}" = set; then
|
|
$1="$$1 ${LBL_CFLAGS}"
|
|
fi
|
|
if test -f .devel ; then
|
|
#
|
|
# Skip all the warning option stuff on some compilers.
|
|
#
|
|
if test "$ac_lbl_cc_dont_try_gcc_dashW" != yes; then
|
|
AC_LBL_CHECK_UNKNOWN_WARNING_OPTION_ERROR()
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wall)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-prototypes)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wstrict-prototypes)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wwrite-strings)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wpointer-arith)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wcast-qual)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wshadow)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wdeclaration-after-statement)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wpedantic)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wold-style-definition)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wused-but-marked-unused)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -W)
|
|
fi
|
|
AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT()
|
|
#
|
|
# We used to set -n32 for IRIX 6 when not using GCC (presumed
|
|
# to mean that we're using MIPS C or MIPSpro C); it specified
|
|
# the "new" faster 32-bit ABI, introduced in IRIX 6.2. I'm
|
|
# not sure why that would be something to do *only* with a
|
|
# .devel file; why should the ABI for which we produce code
|
|
# depend on .devel?
|
|
#
|
|
os=`echo $host_os | sed -e 's/\([[0-9]][[0-9]]*\)[[^0-9]].*$/\1/'`
|
|
name="lbl/os-$os.h"
|
|
if test -f $name ; then
|
|
ln -s $name os-proto.h
|
|
AC_DEFINE(HAVE_OS_PROTO_H, 1,
|
|
[if there's an os_proto.h for this platform, to use additional prototypes])
|
|
else
|
|
AC_MSG_WARN(can't find $name)
|
|
fi
|
|
fi])
|
|
|
|
dnl
|
|
dnl Improved version of AC_CHECK_LIB
|
|
dnl
|
|
dnl Thanks to John Hawkinson (jhawk@mit.edu)
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [,
|
|
dnl ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl LIBS
|
|
dnl
|
|
dnl XXX - "AC_LBL_LIBRARY_NET" was redone to use "AC_SEARCH_LIBS"
|
|
dnl rather than "AC_LBL_CHECK_LIB", so this isn't used any more.
|
|
dnl We keep it around for reference purposes in case it's ever
|
|
dnl useful in the future.
|
|
dnl
|
|
|
|
define(AC_LBL_CHECK_LIB,
|
|
[AC_MSG_CHECKING([for $2 in -l$1])
|
|
dnl Use a cache variable name containing the library, function
|
|
dnl name, and extra libraries to link with, because the test really is
|
|
dnl for library $1 defining function $2, when linked with potinal
|
|
dnl library $5, not just for library $1. Separate tests with the same
|
|
dnl $1 and different $2's or $5's may have different results.
|
|
ac_lib_var=`echo $1['_']$2['_']$5 | sed 'y%./+- %__p__%'`
|
|
AC_CACHE_VAL(ac_cv_lbl_lib_$ac_lib_var,
|
|
[ac_save_LIBS="$LIBS"
|
|
LIBS="-l$1 $5 $LIBS"
|
|
AC_TRY_LINK(dnl
|
|
ifelse([$2], [main], , dnl Avoid conflicting decl of main.
|
|
[/* Override any gcc2 internal prototype to avoid an error. */
|
|
]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
|
|
extern "C"
|
|
#endif
|
|
])dnl
|
|
[/* We use char because int might match the return type of a gcc2
|
|
builtin and then its argument prototype would still apply. */
|
|
char $2();
|
|
]),
|
|
[$2()],
|
|
eval "ac_cv_lbl_lib_$ac_lib_var=yes",
|
|
eval "ac_cv_lbl_lib_$ac_lib_var=no")
|
|
LIBS="$ac_save_LIBS"
|
|
])dnl
|
|
if eval "test \"`echo '$ac_cv_lbl_lib_'$ac_lib_var`\" = yes"; then
|
|
AC_MSG_RESULT(yes)
|
|
ifelse([$3], ,
|
|
[changequote(, )dnl
|
|
ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \
|
|
-e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
|
|
changequote([, ])dnl
|
|
AC_DEFINE_UNQUOTED($ac_tr_lib)
|
|
LIBS="-l$1 $LIBS"
|
|
], [$3])
|
|
else
|
|
AC_MSG_RESULT(no)
|
|
ifelse([$4], , , [$4
|
|
])dnl
|
|
fi
|
|
])
|
|
|
|
dnl
|
|
dnl AC_LBL_LIBRARY_NET
|
|
dnl
|
|
dnl This test is for network applications that need socket() and
|
|
dnl gethostbyname() -ish functions. Under Solaris, those applications
|
|
dnl need to link with "-lsocket -lnsl". Under IRIX, they need to link
|
|
dnl with "-lnsl" but should *not* link with "-lsocket" because
|
|
dnl libsocket.a breaks a number of things (for instance:
|
|
dnl gethostbyname() under IRIX 5.2, and snoop sockets under most
|
|
dnl versions of IRIX).
|
|
dnl
|
|
dnl Unfortunately, many application developers are not aware of this,
|
|
dnl and mistakenly write tests that cause -lsocket to be used under
|
|
dnl IRIX. It is also easy to write tests that cause -lnsl to be used
|
|
dnl under operating systems where neither are necessary (or useful),
|
|
dnl such as SunOS 4.1.4, which uses -lnsl for TLI.
|
|
dnl
|
|
dnl This test exists so that every application developer does not test
|
|
dnl this in a different, and subtly broken fashion.
|
|
|
|
dnl It has been argued that this test should be broken up into two
|
|
dnl seperate tests, one for the resolver libraries, and one for the
|
|
dnl libraries necessary for using Sockets API. Unfortunately, the two
|
|
dnl are carefully intertwined and allowing the autoconf user to use
|
|
dnl them independantly potentially results in unfortunate ordering
|
|
dnl dependancies -- as such, such component macros would have to
|
|
dnl carefully use indirection and be aware if the other components were
|
|
dnl executed. Since other autoconf macros do not go to this trouble,
|
|
dnl and almost no applications use sockets without the resolver, this
|
|
dnl complexity has not been implemented.
|
|
dnl
|
|
dnl The check for libresolv is in case you are attempting to link
|
|
dnl statically and happen to have a libresolv.a lying around (and no
|
|
dnl libnsl.a).
|
|
dnl
|
|
AC_DEFUN(AC_LBL_LIBRARY_NET, [
|
|
# Most operating systems have gethostbyname() in the default searched
|
|
# libraries (i.e. libc):
|
|
# Some OSes (eg. Solaris) place it in libnsl
|
|
# Some strange OSes (SINIX) have it in libsocket:
|
|
AC_SEARCH_LIBS(gethostbyname, nsl socket resolv)
|
|
# Unfortunately libsocket sometimes depends on libnsl and
|
|
# AC_SEARCH_LIBS isn't up to the task of handling dependencies like this.
|
|
if test "$ac_cv_search_gethostbyname" = "no"
|
|
then
|
|
AC_CHECK_LIB(socket, gethostbyname,
|
|
LIBS="-lsocket -lnsl $LIBS", , -lnsl)
|
|
fi
|
|
AC_SEARCH_LIBS(socket, socket, ,
|
|
AC_CHECK_LIB(socket, socket, LIBS="-lsocket -lnsl $LIBS", , -lnsl))
|
|
# DLPI needs putmsg under HPUX so test for -lstr while we're at it
|
|
AC_SEARCH_LIBS(putmsg, str)
|
|
])
|
|
|
|
dnl Copyright (c) 1999 WIDE Project. All rights reserved.
|
|
dnl
|
|
dnl Redistribution and use in source and binary forms, with or without
|
|
dnl modification, are permitted provided that the following conditions
|
|
dnl are met:
|
|
dnl 1. Redistributions of source code must retain the above copyright
|
|
dnl notice, this list of conditions and the following disclaimer.
|
|
dnl 2. Redistributions in binary form must reproduce the above copyright
|
|
dnl notice, this list of conditions and the following disclaimer in the
|
|
dnl documentation and/or other materials provided with the distribution.
|
|
dnl 3. Neither the name of the project nor the names of its contributors
|
|
dnl may be used to endorse or promote products derived from this software
|
|
dnl without specific prior written permission.
|
|
dnl
|
|
dnl THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
|
dnl ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
dnl IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
dnl ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
|
dnl FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
dnl DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
dnl OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
dnl HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
dnl LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
dnl OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
dnl SUCH DAMAGE.
|
|
|
|
dnl
|
|
dnl Test for __attribute__
|
|
dnl
|
|
|
|
AC_DEFUN(AC_C___ATTRIBUTE__, [
|
|
AC_MSG_CHECKING(for __attribute__)
|
|
AC_CACHE_VAL(ac_cv___attribute__, [
|
|
AC_COMPILE_IFELSE([
|
|
AC_LANG_SOURCE([[
|
|
#include <stdlib.h>
|
|
|
|
static void foo(void) __attribute__ ((noreturn));
|
|
|
|
static void
|
|
foo(void)
|
|
{
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
foo();
|
|
}
|
|
]])],
|
|
ac_cv___attribute__=yes,
|
|
ac_cv___attribute__=no)])
|
|
if test "$ac_cv___attribute__" = "yes"; then
|
|
AC_DEFINE(HAVE___ATTRIBUTE__, 1, [define if your compiler has __attribute__])
|
|
else
|
|
#
|
|
# We can't use __attribute__, so we can't use __attribute__((unused)),
|
|
# so we define _U_ to an empty string.
|
|
#
|
|
V_DEFS="$V_DEFS -D_U_=\"\""
|
|
fi
|
|
AC_MSG_RESULT($ac_cv___attribute__)
|
|
])
|
|
|
|
|
|
dnl
|
|
dnl Test whether __attribute__((unused)) can be used without warnings
|
|
dnl
|
|
|
|
AC_DEFUN(AC_C___ATTRIBUTE___UNUSED, [
|
|
AC_MSG_CHECKING([whether __attribute__((unused)) can be used without warnings])
|
|
AC_CACHE_VAL(ac_cv___attribute___unused, [
|
|
save_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors"
|
|
AC_COMPILE_IFELSE([
|
|
AC_LANG_SOURCE([[
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
int
|
|
main(int argc __attribute((unused)), char **argv __attribute((unused)))
|
|
{
|
|
printf("Hello, world!\n");
|
|
return 0;
|
|
}
|
|
]])],
|
|
ac_cv___attribute___unused=yes,
|
|
ac_cv___attribute___unused=no)])
|
|
CFLAGS="$save_CFLAGS"
|
|
if test "$ac_cv___attribute___unused" = "yes"; then
|
|
V_DEFS="$V_DEFS -D_U_=\"__attribute__((unused))\""
|
|
else
|
|
V_DEFS="$V_DEFS -D_U_=\"\""
|
|
fi
|
|
AC_MSG_RESULT($ac_cv___attribute___unused)
|
|
])
|
|
|
|
dnl
|
|
dnl Test whether __attribute__((fallthrough)) can be used without warnings
|
|
dnl
|
|
|
|
AC_DEFUN(AC_C___ATTRIBUTE___FALLTHROUGH, [
|
|
AC_MSG_CHECKING([whether __attribute__((fallthrough)) can be used without warnings])
|
|
AC_CACHE_VAL(ac_cv___attribute___fallthrough, [
|
|
save_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors"
|
|
AC_COMPILE_IFELSE([
|
|
AC_LANG_SOURCE([[
|
|
#include <stdio.h>
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int x = 1;
|
|
switch (x)
|
|
{
|
|
case 1:
|
|
printf ("x == %d\n", x);
|
|
__attribute__ ((fallthrough));
|
|
case 2:
|
|
printf ("x == %d\n", x);
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
return x;
|
|
}
|
|
]])],
|
|
ac_cv___attribute___fallthrough=yes,
|
|
ac_cv___attribute___fallthrough=no)])
|
|
CFLAGS="$save_CFLAGS"
|
|
if test "$ac_cv___attribute___fallthrough" = "yes"; then
|
|
AC_DEFINE(__ATTRIBUTE___FALLTHROUGH_OK, 1,
|
|
[define if your compiler allows __attribute__((fallthrough)) without a warning])
|
|
fi
|
|
AC_MSG_RESULT($ac_cv___attribute___fallthrough)
|
|
])
|
|
|
|
AC_DEFUN(AC_LBL_SSLEAY,
|
|
[
|
|
#
|
|
# Find the last component of $libdir; it's not necessarily
|
|
# "lib" - it might be "lib64" on, for example, x86-64
|
|
# Linux systems.
|
|
#
|
|
# We assume the directory in which we're looking for
|
|
# libcrypto has a subdirectory with that as its name.
|
|
#
|
|
tmplib=`echo "$libdir" | sed 's,.*/,,'`
|
|
|
|
#
|
|
# XXX - is there a better way to check if a given library is
|
|
# in a given directory than checking each of the possible
|
|
# shared library suffixes?
|
|
#
|
|
# Are there any other suffixes we need to look for? Do we
|
|
# have to worry about ".so.{version}"?
|
|
#
|
|
# Or should we just look for "libcrypto.*"?
|
|
#
|
|
if test -d "$1/$tmplib" -a \( -f "$1/$tmplib/libcrypto.a" -o \
|
|
-f "$1/$tmplib/libcrypto.so" -o \
|
|
-f "$1/$tmplib/libcrypto.sl" -o \
|
|
-f "$1/$tmplib/libcrypto.dylib" \); then
|
|
ac_cv_ssleay_path="$1"
|
|
fi
|
|
|
|
#
|
|
# Make sure we have the headers as well.
|
|
#
|
|
if test -d "$1/include/openssl" -a -f "$1/include/openssl/des.h"; then
|
|
incdir="-I$1/include"
|
|
fi
|
|
])
|