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aclocal.m4
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dnl Copyright (c) 1995, 1996, 1997, 1998
dnl The Regents of the University of California. All rights reserved.
dnl
dnl Redistribution and use in source and binary forms, with or without
dnl modification, are permitted provided that: (1) source code distributions
dnl retain the above copyright notice and this paragraph in its entirety, (2)
dnl distributions including binary code include the above copyright notice and
dnl this paragraph in its entirety in the documentation or other materials
dnl provided with the distribution, and (3) all advertising materials mentioning
dnl features or use of this software display the following acknowledgement:
dnl ``This product includes software developed by the University of California,
dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
dnl the University nor the names of its contributors may be used to endorse
dnl or promote products derived from this software without specific prior
dnl written permission.
dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
dnl
dnl LBL autoconf macros
dnl
dnl
dnl Do whatever AC_LBL_C_INIT work is necessary before using AC_PROG_CC.
dnl
dnl It appears that newer versions of autoconf (2.64 and later) will,
dnl if you use AC_TRY_COMPILE in a macro, stick AC_PROG_CC at the
dnl beginning of the macro, even if the macro itself calls AC_PROG_CC.
dnl See the "Prerequisite Macros" and "Expanded Before Required" sections
dnl in the Autoconf documentation.
dnl
dnl This causes a steaming heap of fail in our case, as we were, in
dnl AC_LBL_C_INIT, doing the tests we now do in AC_LBL_C_INIT_BEFORE_CC,
dnl calling AC_PROG_CC, and then doing the tests we now do in
dnl AC_LBL_C_INIT. Now, we run AC_LBL_C_INIT_BEFORE_CC, AC_PROG_CC,
dnl and AC_LBL_C_INIT at the top level.
dnl
AC_DEFUN(AC_LBL_C_INIT_BEFORE_CC,
[
AC_BEFORE([$0], [AC_LBL_C_INIT])
AC_BEFORE([$0], [AC_PROG_CC])
AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
AC_BEFORE([$0], [AC_LBL_DEVEL])
AC_ARG_WITH(gcc, [ --without-gcc don't use gcc])
$1=""
if test "${srcdir}" != "." ; then
$1="-I\$(srcdir)"
fi
if test "${CFLAGS+set}" = set; then
LBL_CFLAGS="$CFLAGS"
fi
if test -z "$CC" ; then
case "$host_os" in
bsdi*)
AC_CHECK_PROG(SHLICC2, shlicc2, yes, no)
if test $SHLICC2 = yes ; then
CC=shlicc2
export CC
fi
;;
esac
fi
if test -z "$CC" -a "$with_gcc" = no ; then
CC=cc
export CC
fi
])
dnl
dnl Determine which compiler we're using (cc or gcc)
dnl If using gcc, determine the version number
dnl If using cc:
dnl require that it support ansi prototypes
dnl use -O (AC_PROG_CC will use -g -O2 on gcc, so we don't need to
dnl do that ourselves for gcc)
dnl add -g flags, as appropriate
dnl explicitly specify /usr/local/include
dnl
dnl NOTE WELL: with newer versions of autoconf, "gcc" means any compiler
dnl that defines __GNUC__, which means clang, for example, counts as "gcc".
dnl
dnl usage:
dnl
dnl AC_LBL_C_INIT(copt, incls)
dnl
dnl results:
dnl
dnl $1 (copt set)
dnl $2 (incls set)
dnl CC
dnl LDFLAGS
dnl LBL_CFLAGS
dnl
AC_DEFUN(AC_LBL_C_INIT,
[
AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
AC_BEFORE([$0], [AC_LBL_DEVEL])
AC_BEFORE([$0], [AC_LBL_SHLIBS_INIT])
if test "$GCC" = yes ; then
#
# -Werror forces warnings to be errors.
#
ac_lbl_cc_force_warning_errors=-Werror
else
$2="$$2 -I/usr/local/include"
LDFLAGS="$LDFLAGS -L/usr/local/lib"
case "$host_os" in
darwin*)
#
# This is assumed either to be GCC or clang, both
# of which use -Werror to force warnings to be errors.
#
ac_lbl_cc_force_warning_errors=-Werror
;;
hpux*)
#
# HP C, which is what we presume we're using, doesn't
# exit with a non-zero exit status if we hand it an
# invalid -W flag, can't be forced to do so even with
# +We, and doesn't handle GCC-style -W flags, so we
# don't want to try using GCC-style -W flags.
#
ac_lbl_cc_dont_try_gcc_dashW=yes
;;
irix*)
#
# MIPS C, which is what we presume we're using, doesn't
# necessarily exit with a non-zero exit status if we
# hand it an invalid -W flag, can't be forced to do
# so, and doesn't handle GCC-style -W flags, so we
# don't want to try using GCC-style -W flags.
#
ac_lbl_cc_dont_try_gcc_dashW=yes
#
# It also, apparently, defaults to "char" being
# unsigned, unlike most other C implementations;
# I suppose we could say "signed char" whenever
# we want to guarantee a signed "char", but let's
# just force signed chars.
#
# -xansi is normally the default, but the
# configure script was setting it; perhaps -cckr
# was the default in the Old Days. (Then again,
# that would probably be for backwards compatibility
# in the days when ANSI C was Shiny and New, i.e.
# 1989 and the early '90's, so maybe we can just
# drop support for those compilers.)
#
# -g is equivalent to -g2, which turns off
# optimization; we choose -g3, which generates
# debugging information but doesn't turn off
# optimization (even if the optimization would
# cause inaccuracies in debugging).
#
$1="$$1 -xansi -signed -g3"
;;
osf*)
#
# Presumed to be DEC OSF/1, Digital UNIX, or
# Tru64 UNIX.
#
# The DEC C compiler, which is what we presume we're
# using, doesn't exit with a non-zero exit status if we
# hand it an invalid -W flag, can't be forced to do
# so, and doesn't handle GCC-style -W flags, so we
# don't want to try using GCC-style -W flags.
#
ac_lbl_cc_dont_try_gcc_dashW=yes
#
# -g is equivalent to -g2, which turns off
# optimization; we choose -g3, which generates
# debugging information but doesn't turn off
# optimization (even if the optimization would
# cause inaccuracies in debugging).
#
$1="$$1 -g3"
;;
solaris*)
#
# Assumed to be Sun C, which requires -errwarn to force
# warnings to be treated as errors.
#
ac_lbl_cc_force_warning_errors=-errwarn
;;
ultrix*)
AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes)
AC_CACHE_VAL(ac_cv_lbl_cc_const_proto,
AC_TRY_COMPILE(
[#include <sys/types.h>],
[struct a { int b; };
void c(const struct a *)],
ac_cv_lbl_cc_const_proto=yes,
ac_cv_lbl_cc_const_proto=no))
AC_MSG_RESULT($ac_cv_lbl_cc_const_proto)
if test $ac_cv_lbl_cc_const_proto = no ; then
AC_DEFINE(const,[],
[to handle Ultrix compilers that don't support const in prototypes])
fi
;;
esac
$1="$$1 -O"
fi
])
dnl
dnl Check whether, if you pass an unknown warning option to the
dnl compiler, it fails or just prints a warning message and succeeds.
dnl Set ac_lbl_unknown_warning_option_error to the appropriate flag
dnl to force an error if it would otherwise just print a warning message
dnl and succeed.
dnl
AC_DEFUN(AC_LBL_CHECK_UNKNOWN_WARNING_OPTION_ERROR,
[
AC_MSG_CHECKING([whether the compiler fails when given an unknown warning option])
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wxyzzy-this-will-never-succeed-xyzzy"
AC_TRY_COMPILE(
[],
[return 0],
[
AC_MSG_RESULT([no])
#
# We're assuming this is clang, where
# -Werror=unknown-warning-option is the appropriate
# option to force the compiler to fail.
#
ac_lbl_unknown_warning_option_error="-Werror=unknown-warning-option"
],
[
AC_MSG_RESULT([yes])
])
CFLAGS="$save_CFLAGS"
])
dnl
dnl Check whether the compiler option specified as the second argument
dnl is supported by the compiler and, if so, add it to the macro
dnl specified as the first argument
dnl
AC_DEFUN(AC_LBL_CHECK_COMPILER_OPT,
[
AC_MSG_CHECKING([whether the compiler supports the $2 option])
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $ac_lbl_unknown_warning_option_error $2"
AC_TRY_COMPILE(
[],
[return 0],
[
AC_MSG_RESULT([yes])
CFLAGS="$save_CFLAGS"
$1="$$1 $2"
],
[
AC_MSG_RESULT([no])
CFLAGS="$save_CFLAGS"
])
])
dnl
dnl Check whether the compiler supports an option to generate
dnl Makefile-style dependency lines
dnl
dnl GCC uses -M for this. Non-GCC compilers that support this
dnl use a variety of flags, including but not limited to -M.
dnl
dnl We test whether the flag in question is supported, as older
dnl versions of compilers might not support it.
dnl
dnl We don't try all the possible flags, just in case some flag means
dnl "generate dependencies" on one compiler but means something else
dnl on another compiler.
dnl
dnl Most compilers that support this send the output to the standard
dnl output by default. IBM's XLC, however, supports -M but sends
dnl the output to {sourcefile-basename}.u, and AIX has no /dev/stdout
dnl to work around that, so we don't bother with XLC.
dnl
AC_DEFUN(AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT,
[
AC_MSG_CHECKING([whether the compiler supports generating dependencies])
if test "$GCC" = yes ; then
#
# GCC, or a compiler deemed to be GCC by AC_PROG_CC (even
# though it's not); we assume that, in this case, the flag
# would be -M.
#
ac_lbl_dependency_flag="-M"
else
#
# Not GCC or a compiler deemed to be GCC; what platform is
# this? (We're assuming that if the compiler isn't GCC
# it's the compiler from the vendor of the OS; that won't
# necessarily be true for x86 platforms, where it might be
# the Intel C compiler.)
#
case "$host_os" in
irix*|osf*|darwin*)
#
# MIPS C for IRIX, DEC C, and clang all use -M.
#
ac_lbl_dependency_flag="-M"
;;
solaris*)
#
# Sun C uses -xM.
#
ac_lbl_dependency_flag="-xM"
;;
hpux*)
#
# HP's older C compilers don't support this.
# HP's newer C compilers support this with
# either +M or +Make; the older compilers
# interpret +M as something completely
# different, so we use +Make so we don't
# think it works with the older compilers.
#
ac_lbl_dependency_flag="+Make"
;;
*)
#
# Not one of the above; assume no support for
# generating dependencies.
#
ac_lbl_dependency_flag=""
;;
esac
fi
#
# Is ac_lbl_dependency_flag defined and, if so, does the compiler
# complain about it?
#
# Note: clang doesn't seem to exit with an error status when handed
# an unknown non-warning error, even if you pass it
# -Werror=unknown-warning-option. However, it always supports
# -M, so the fact that this test always succeeds with clang
# isn't an issue.
#
if test ! -z "$ac_lbl_dependency_flag"; then
AC_LANG_CONFTEST(
[AC_LANG_SOURCE([[int main(void) { return 0; }]])])
echo "$CC" $ac_lbl_dependency_flag conftest.c >&5
if "$CC" $ac_lbl_dependency_flag conftest.c >/dev/null 2>&1; then
AC_MSG_RESULT([yes, with $ac_lbl_dependency_flag])
DEPENDENCY_CFLAG="$ac_lbl_dependency_flag"
MKDEP='${srcdir}/mkdep'
else
AC_MSG_RESULT([no])
#
# We can't run mkdep, so have "make depend" do
# nothing.
#
MKDEP=:
fi
rm -rf conftest*
else
AC_MSG_RESULT([no])
#
# We can't run mkdep, so have "make depend" do
# nothing.
#
MKDEP=:
fi
AC_SUBST(DEPENDENCY_CFLAG)
AC_SUBST(MKDEP)
])
dnl
dnl Determine what options are needed to build a shared library
dnl
dnl usage:
dnl
dnl AC_LBL_SHLIBS_INIT
dnl
dnl results:
dnl
dnl V_CCOPT (modified to build position-independent code)
dnl V_SHLIB_CMD
dnl V_SHLIB_OPT
dnl V_SONAME_OPT
dnl V_RPATH_OPT
dnl
AC_DEFUN(AC_LBL_SHLIBS_INIT,
[AC_PREREQ(2.50)
if test "$GCC" = yes ; then
#
# On platforms where we build a shared library:
#
# add options to generate position-independent code,
# if necessary (it's the default in AIX and Darwin/OS X);
#
# define option to set the soname of the shared library,
# if the OS supports that;
#
# add options to specify, at link time, a directory to
# add to the run-time search path, if that's necessary.
#
V_SHLIB_CMD="\$(CC)"
V_SHLIB_OPT="-shared"
case "$host_os" in
aix*)
;;
freebsd*|netbsd*|openbsd*|dragonfly*|linux*|osf*)
#
# Platforms where the linker is the GNU linker
# or accepts command-line arguments like
# those the GNU linker accepts.
#
# Some instruction sets require -fPIC on some
# operating systems. Check for them. If you
# have a combination that requires it, add it
# here.
#
PIC_OPT=-fpic
case "$host_cpu" in
sparc64*)
case "$host_os" in
freebsd*|openbsd*)
PIC_OPT=-fPIC
;;
esac
;;
esac
V_CCOPT="$V_CCOPT $PIC_OPT"
V_SONAME_OPT="-Wl,-soname,"
V_RPATH_OPT="-Wl,-rpath,"
;;
hpux*)
V_CCOPT="$V_CCOPT -fpic"
#
# XXX - this assumes GCC is using the HP linker,
# rather than the GNU linker, and that the "+h"
# option is used on all HP-UX platforms, both .sl
# and .so.
#
V_SONAME_OPT="-Wl,+h,"
#
# By default, directories specifed with -L
# are added to the run-time search path, so
# we don't add them in pcap-config.
#
;;
solaris*)
V_CCOPT="$V_CCOPT -fpic"
#
# XXX - this assumes GCC is using the Sun linker,
# rather than the GNU linker.
#
V_SONAME_OPT="-Wl,-h,"
V_RPATH_OPT="-Wl,-R,"
;;
esac
else
#
# Set the appropriate compiler flags and, on platforms
# where we build a shared library:
#
# add options to generate position-independent code,
# if necessary (it's the default in Darwin/OS X);
#
# if we generate ".so" shared libraries, define the
# appropriate options for building the shared library;
#
# add options to specify, at link time, a directory to
# add to the run-time search path, if that's necessary.
#
# Note: spaces after V_SONAME_OPT are significant; on
# some platforms the soname is passed with a GCC-like
# "-Wl,-soname,{soname}" option, with the soname part
# of the option, while on other platforms the C compiler
# driver takes it as a regular option with the soname
# following the option. The same applies to V_RPATH_OPT.
#
case "$host_os" in
aix*)
V_SHLIB_CMD="\$(CC)"
V_SHLIB_OPT="-G -bnoentry -bexpall"
;;
freebsd*|netbsd*|openbsd*|dragonfly*|linux*)
#
# "cc" is GCC.
#
V_CCOPT="$V_CCOPT -fpic"
V_SHLIB_CMD="\$(CC)"
V_SHLIB_OPT="-shared"
V_SONAME_OPT="-Wl,-soname,"
V_RPATH_OPT="-Wl,-rpath,"
;;
hpux*)
V_CCOPT="$V_CCOPT +z"
V_SHLIB_CMD="\$(LD)"
V_SHLIB_OPT="-b"
V_SONAME_OPT="+h "
#
# By default, directories specifed with -L
# are added to the run-time search path, so
# we don't add them in pcap-config.
#
;;
osf*)
#
# Presumed to be DEC OSF/1, Digital UNIX, or
# Tru64 UNIX.
#
V_SHLIB_CMD="\$(CC)"
V_SHLIB_OPT="-shared"
V_SONAME_OPT="-soname "
V_RPATH_OPT="-rpath "
;;
solaris*)
V_CCOPT="$V_CCOPT -Kpic"
V_SHLIB_CMD="\$(CC)"
V_SHLIB_OPT="-G"
V_SONAME_OPT="-h "
V_RPATH_OPT="-R"
;;
esac
fi
])
#
# 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;
# 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"
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 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 Check for flex, default to lex
dnl Require flex 2.4 or higher
dnl Check for bison, default to yacc
dnl Default to lex/yacc if both flex and bison are not available
dnl
dnl If we're using flex and bison, pass -P to flex and -p to bison
dnl to define a prefix string for the lexer and parser
dnl
dnl If we're not using flex and bison, don't pass those options
dnl (as they might not work - although if "lex" is a wrapper for
dnl Flex and "yacc" is a wrapper for Bison, they will work), and
dnl define NEED_YYPARSE_WRAPPER (we *CANNOT* use YYBISON to check
dnl whether the wrapper is needed, as some people apparently, for
dnl some unknown reason, choose to use --without-flex and
dnl --without-bison on systems that have Flex and Bison, which
dnl means that the "yacc" they end up using is a wrapper that
dnl runs "bison -y", and at least some versions of Bison define
dnl YYBISON even if run with "-y", so we end up not compiling
dnl the yyparse wrapper and end up with a libpcap that doesn't
dnl define pcap_parse())
dnl
dnl usage:
dnl
dnl AC_LBL_LEX_AND_YACC(lex, yacc, yyprefix)
dnl
dnl results:
dnl
dnl $1 (lex set)
dnl $2 (yacc appended)
dnl $3 (optional flex and bison -P prefix)
dnl
AC_DEFUN(AC_LBL_LEX_AND_YACC,
[AC_ARG_WITH(flex, [ --without-flex don't use flex])
AC_ARG_WITH(bison, [ --without-bison don't use bison])
if test "$with_flex" = no ; then
$1=lex
else
AC_CHECK_PROGS($1, flex, lex)
fi
if test "$$1" = flex ; then
# The -V flag was added in 2.4
AC_MSG_CHECKING(for flex 2.4 or higher)
AC_CACHE_VAL(ac_cv_lbl_flex_v24,
if flex -V >/dev/null 2>&1; then
ac_cv_lbl_flex_v24=yes
else
ac_cv_lbl_flex_v24=no
fi)
AC_MSG_RESULT($ac_cv_lbl_flex_v24)
if test $ac_cv_lbl_flex_v24 = no ; then
s="2.4 or higher required"
AC_MSG_WARN(ignoring obsolete flex executable ($s))
$1=lex
fi
fi
if test "$with_bison" = no ; then
$2=yacc
else
AC_CHECK_PROGS($2, bison, yacc)
fi
if test "$$2" = bison ; then
$2="$$2 -y"
fi
if test "$$1" != lex -a "$$2" = yacc -o "$$1" = lex -a "$$2" != yacc ; then
AC_MSG_WARN(don't have both flex and bison; reverting to lex/yacc)
$1=lex
$2=yacc
fi
if test "$$1" = flex -a -n "$3" ; then
$1="$$1 -P$3"
$2="$$2 -p $3"
else
AC_DEFINE(NEED_YYPARSE_WRAPPER,1,[if we need a pcap_parse wrapper around yyparse])
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 there's a sockaddr_storage structure
dnl
dnl usage:
dnl
dnl AC_LBL_SOCKADDR_STORAGE
dnl
dnl results:
dnl
dnl HAVE_SOCKADDR_STORAGE (defined)
dnl
AC_DEFUN(AC_LBL_SOCKADDR_STORAGE,
[AC_MSG_CHECKING(if sockaddr_storage struct exists)
AC_CACHE_VAL(ac_cv_lbl_has_sockaddr_storage,
AC_TRY_COMPILE([
# include <sys/types.h>
# include <sys/socket.h>],
[u_int i = sizeof (struct sockaddr_storage)],
ac_cv_lbl_has_sockaddr_storage=yes,
ac_cv_lbl_has_sockaddr_storage=no))
AC_MSG_RESULT($ac_cv_lbl_has_sockaddr_storage)
if test $ac_cv_lbl_has_sockaddr_storage = yes ; then
AC_DEFINE(HAVE_SOCKADDR_STORAGE,1,[if struct sockaddr_storage exists])
fi])
dnl
dnl Checks to see if the dl_hp_ppa_info_t struct has the HP-UX 11.00
dnl dl_module_id_1 member
dnl
dnl usage:
dnl
dnl AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1
dnl
dnl results:
dnl
dnl HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1 (defined)
dnl
dnl NOTE: any compile failure means we conclude that it doesn't have
dnl that member, so if we don't have DLPI, don't have a <sys/dlpi_ext.h>
dnl header, or have one that doesn't declare a dl_hp_ppa_info_t type,
dnl we conclude it doesn't have that member (which is OK, as either we
dnl won't be using code that would use that member, or we wouldn't
dnl compile in any case).
dnl
AC_DEFUN(AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1,
[AC_MSG_CHECKING(if dl_hp_ppa_info_t struct has dl_module_id_1 member)
AC_CACHE_VAL(ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1,
AC_TRY_COMPILE([
# include <sys/types.h>
# include <sys/dlpi.h>
# include <sys/dlpi_ext.h>],
[u_int i = sizeof(((dl_hp_ppa_info_t *)0)->dl_module_id_1)],
ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1=yes,
ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1=no))
AC_MSG_RESULT($ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1)
if test $ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1 = yes ; then
AC_DEFINE(HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1,1,[if ppa_info_t_dl_module_id exists])
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 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, -Wdeclaration-after-statement)
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 ([email protected])