mirror of
https://github.com/the-tcpdump-group/tcpdump.git
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494b45734c
Thank you, clang, for treating unknown -f flags as warnings, only failing with them if run with -Werror, and spewing out warning messages whenever they're used.
1361 lines
40 KiB
Plaintext
1361 lines
40 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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#
|
|
# 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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#
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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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#
|
|
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])
|
|
#
|
|
# 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])
|
|
#
|
|
# We can't run mkdep, so have "make depend" do
|
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# nothing.
|
|
#
|
|
MKDEP=:
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fi
|
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AC_SUBST(DEPENDENCY_CFLAG)
|
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AC_SUBST(MKDEP)
|
|
])
|
|
|
|
#
|
|
# Try compiling a sample of the type of code that appears in
|
|
# gencode.c with "inline", "__inline__", and "__inline".
|
|
#
|
|
# Autoconf's AC_C_INLINE, at least in autoconf 2.13, isn't good enough,
|
|
# 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
|
|
# inline a function that returns a struct pointer.
|
|
#
|
|
# Make sure we use the V_CCOPT flags, because some of those might
|
|
# disable inlining.
|
|
#
|
|
AC_DEFUN(AC_LBL_C_INLINE,
|
|
[AC_MSG_CHECKING(for inline)
|
|
save_CFLAGS="$CFLAGS"
|
|
CFLAGS="$V_CCOPT"
|
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AC_CACHE_VAL(ac_cv_lbl_inline, [
|
|
ac_cv_lbl_inline=""
|
|
ac_lbl_cc_inline=no
|
|
for ac_lbl_inline in inline __inline__ __inline
|
|
do
|
|
AC_TRY_COMPILE(
|
|
[#define inline $ac_lbl_inline
|
|
static inline struct iltest *foo(void);
|
|
struct iltest {
|
|
int iltest1;
|
|
int iltest2;
|
|
};
|
|
|
|
static inline struct iltest *
|
|
foo()
|
|
{
|
|
static struct iltest xxx;
|
|
|
|
return &xxx;
|
|
}],,ac_lbl_cc_inline=yes,)
|
|
if test "$ac_lbl_cc_inline" = yes ; then
|
|
break;
|
|
fi
|
|
done
|
|
if test "$ac_lbl_cc_inline" = yes ; then
|
|
ac_cv_lbl_inline=$ac_lbl_inline
|
|
fi])
|
|
CFLAGS="$save_CFLAGS"
|
|
if test ! -z "$ac_cv_lbl_inline" ; then
|
|
AC_MSG_RESULT($ac_cv_lbl_inline)
|
|
else
|
|
AC_MSG_RESULT(no)
|
|
fi
|
|
AC_DEFINE_UNQUOTED(inline, $ac_cv_lbl_inline, [Define as token for inline if inlining supported])])
|
|
|
|
dnl
|
|
dnl Use pfopen.c if available and pfopen() not in standard libraries
|
|
dnl Require libpcap
|
|
dnl Look for libpcap in ..
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|
dnl Use the installed libpcap if there is no local version
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_LIBPCAP(pcapdep, incls)
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl $1 (pcapdep set)
|
|
dnl $2 (incls appended)
|
|
dnl LIBS
|
|
dnl LBL_LIBS
|
|
dnl
|
|
AC_DEFUN(AC_LBL_LIBPCAP,
|
|
[AC_REQUIRE([AC_LBL_LIBRARY_NET])
|
|
dnl
|
|
dnl save a copy before locating libpcap.a
|
|
dnl
|
|
LBL_LIBS="$LIBS"
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|
pfopen=/usr/examples/packetfilter/pfopen.c
|
|
if test -f $pfopen ; then
|
|
AC_CHECK_FUNCS(pfopen)
|
|
if test $ac_cv_func_pfopen = "no" ; then
|
|
AC_MSG_RESULT(Using $pfopen)
|
|
LIBS="$LIBS $pfopen"
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|
fi
|
|
fi
|
|
libpcap=FAIL
|
|
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
|
|
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(
|
|
[Report this to tcpdump-workers@lists.tcpdump.org, 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, -pedantic)
|
|
AC_LBL_CHECK_COMPILER_OPT($1, -Wold-style-definition)
|
|
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__((format)) can be used without warnings
|
|
dnl
|
|
|
|
AC_DEFUN(AC_C___ATTRIBUTE___FORMAT, [
|
|
AC_MSG_CHECKING([whether __attribute__((format)) can be used without warnings])
|
|
AC_CACHE_VAL(ac_cv___attribute___format, [
|
|
save_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors"
|
|
AC_COMPILE_IFELSE([
|
|
AC_LANG_SOURCE([[
|
|
#include <stdlib.h>
|
|
|
|
extern int foo(const char *fmt, ...)
|
|
__attribute__ ((format (printf, 1, 2)));
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
foo("%s", "test");
|
|
}
|
|
]])],
|
|
ac_cv___attribute___format=yes,
|
|
ac_cv___attribute___format=no)])
|
|
CFLAGS="$save_CFLAGS"
|
|
if test "$ac_cv___attribute___format" = "yes"; then
|
|
AC_DEFINE(__ATTRIBUTE___FORMAT_OK, 1,
|
|
[define if your compiler allows __attribute__((format)) without a warning])
|
|
fi
|
|
AC_MSG_RESULT($ac_cv___attribute___format)
|
|
])
|
|
|
|
dnl
|
|
dnl Test whether __attribute__((format)) can be applied to function
|
|
dnl pointers
|
|
dnl
|
|
|
|
AC_DEFUN(AC_C___ATTRIBUTE___FORMAT_FUNCTION_POINTER, [
|
|
AC_MSG_CHECKING([whether __attribute__((format)) can be applied to function pointers])
|
|
AC_CACHE_VAL(ac_cv___attribute___format_function_pointer, [
|
|
AC_COMPILE_IFELSE([
|
|
AC_LANG_SOURCE([[
|
|
#include <stdlib.h>
|
|
|
|
extern int (*foo)(const char *fmt, ...)
|
|
__attribute__ ((format (printf, 1, 2)));
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
(*foo)("%s", "test");
|
|
}
|
|
]])],
|
|
ac_cv___attribute___format_function_pointer=yes,
|
|
ac_cv___attribute___format_function_pointer=no)])
|
|
if test "$ac_cv___attribute___format_function_pointer" = "yes"; then
|
|
AC_DEFINE(__ATTRIBUTE___FORMAT_OK_FOR_FUNCTION_POINTERS, 1,
|
|
[define if your compiler allows __attribute__((format)) to be applied to function pointers])
|
|
fi
|
|
AC_MSG_RESULT($ac_cv___attribute___format_function_pointer)
|
|
])
|
|
|
|
AC_DEFUN(AC_C___ATTRIBUTE___NORETURN_FUNCTION_POINTER, [
|
|
AC_MSG_CHECKING([whether __attribute__((noreturn)) can be applied to function pointers without warnings])
|
|
AC_CACHE_VAL(ac_cv___attribute___noreturn_function_pointer, [
|
|
save_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors"
|
|
AC_COMPILE_IFELSE([
|
|
AC_LANG_SOURCE([[
|
|
#include <stdlib.h>
|
|
|
|
extern int (*foo)(int i)
|
|
__attribute__ ((noreturn));
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
(*foo)(1);
|
|
}
|
|
]])],
|
|
ac_cv___attribute___noreturn_function_pointer=yes,
|
|
ac_cv___attribute___noreturn_function_pointer=no)])
|
|
CFLAGS="$save_CFLAGS"
|
|
if test "$ac_cv___attribute___noreturn_function_pointer" = "yes"; then
|
|
AC_DEFINE(__ATTRIBUTE___NORETURN_OK_FOR_FUNCTION_POINTERS, 1,
|
|
[define if your compiler allows __attribute__((noreturn)) to be applied to function pointers])
|
|
fi
|
|
AC_MSG_RESULT($ac_cv___attribute___noreturn_function_pointer)
|
|
])
|
|
|
|
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
|
|
])
|