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dnl ##
dnl ## GNU Pth - The GNU Portable Threads
dnl ## Copyright (c) 1999-2004 Ralf S. Engelschall <rse@engelschall.com>
dnl ##
dnl ## This file is part of GNU Pth, a non-preemptive thread scheduling
dnl ## library which can be found at http://www.gnu.org/software/pth/.
dnl ##
dnl ## This library is free software; you can redistribute it and/or
dnl ## modify it under the terms of the GNU Lesser General Public
dnl ## License as published by the Free Software Foundation; either
dnl ## version 2.1 of the License, or (at your option) any later version.
dnl ##
dnl ## This library is distributed in the hope that it will be useful,
dnl ## but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dnl ## Lesser General Public License for more details.
dnl ##
dnl ## You should have received a copy of the GNU Lesser General Public
dnl ## License along with this library; if not, write to the Free Software
dnl ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
dnl ## USA, or contact Ralf S. Engelschall <rse@engelschall.com>.
dnl ##
dnl ## aclocal.m4: Pth Autoconf macros
dnl ##
dnl # ``"Reuse an expert's code" is the right
dnl # advice for most people. But it's a useless
dnl # advice for the experts writing the code
dnl # in the first place.'
dnl # -- Dan J. Bernstein
dnl ##
dnl ## Check for socket/network size type
dnl ##
dnl ## configure.ac:
dnl ## AC_CHECK_SOCKLENTYPE(<action-with-${ac_type}>)
dnl ##
dnl ##
dnl ## Check for an ANSI C typedef in a header
dnl ##
dnl ## configure.ac:
dnl ## AC_CHECK_TYPEDEF(<typedef>, <header>)
dnl ## acconfig.h:
dnl ## #undef HAVE_<typedef>
dnl ##
AC_DEFUN(AC_CHECK_TYPEDEF,[dnl
AC_REQUIRE([AC_HEADER_STDC])dnl
AC_MSG_CHECKING(for typedef $1)
AC_CACHE_VAL(ac_cv_typedef_$1,
[AC_EGREP_CPP(dnl
changequote(<<,>>)dnl
<<(^|[^a-zA-Z_0-9])$1[^a-zA-Z_0-9]>>dnl
changequote([,]), [
#include <$2>
], ac_cv_typedef_$1=yes, ac_cv_typedef_$1=no)])dnl
AC_MSG_RESULT($ac_cv_typedef_$1)
if test $ac_cv_typedef_$1 = yes; then
AC_DEFINE(HAVE_[]translit($1, [a-z], [A-Z]), 1,
[define if typedef $1 exists in header $2])
fi
])
dnl ##
dnl ## Check for argument type of a function
dnl ##
dnl ## configure.ac:
dnl ## AC_CHECK_ARGTYPE(<header> [...], <func>, <arg-number>,
dnl ## <max-arg-number>, <action-with-${ac_type}>)
dnl ##
AC_DEFUN(AC_CHECK_ARGTYPE,[dnl
AC_REQUIRE_CPP()dnl
AC_MSG_CHECKING([for type of argument $3 for $2()])
AC_CACHE_VAL([ac_cv_argtype_$2$3],[
cat >conftest.$ac_ext <<EOF
[#]line __oline__ "configure"
#include "confdefs.h"
EOF
for ifile in $1; do
echo "#include <$ifile>" >>conftest.$ac_ext
done
gpat=''
spat=''
i=1
changequote(, )dnl
while test $i -le $4; do
gpat="$gpat[^,]*"
if test $i -eq $3; then
spat="$spat\\([^,]*\\)"
else
spat="$spat[^,]*"
fi
if test $i -lt $4; then
gpat="$gpat,"
spat="$spat,"
fi
i=`expr $i + 1`
done
changequote([, ])dnl
(eval "$ac_cpp conftest.$ac_ext") 2>&AC_FD_CC |\
changequote(, )dnl
sed -e ':join' \
-e '/,[ ]*$/N' \
-e 's/,[ ]*\n[ ]*/, /' \
-e 'tjoin' |\
egrep "[^a-zA-Z0-9_]$2[ ]*\\($gpat\\)" | head -1 |\
sed -e "s/.*[^a-zA-Z0-9_]$2[ ]*($spat).*/\\1/" \
-e 's/(\*[a-zA-Z_][a-zA-Z_0-9]*)/(*)/' \
-e 's/^[ ]*//' -e 's/[ ]*$//' \
-e 's/^/arg:/' \
-e 's/^arg:\([^ ]*\)$/type:\1/' \
-e 's/^arg:\(.*_t\)*$/type:\1/' \
-e 's/^arg:\(.*\*\)$/type:\1/' \
-e 's/^arg:\(.*[ ]\*\)[_a-zA-Z][_a-zA-Z0-9]*$/type:\1/' \
-e 's/^arg:\(.*[ ]char\)$/type:\1/' \
-e 's/^arg:\(.*[ ]short\)$/type:\1/' \
-e 's/^arg:\(.*[ ]int\)$/type:\1/' \
-e 's/^arg:\(.*[ ]long\)$/type:\1/' \
-e 's/^arg:\(.*[ ]float\)$/type:\1/' \
-e 's/^arg:\(.*[ ]double\)$/type:\1/' \
-e 's/^arg:\(.*[ ]unsigned\)$/type:\1/' \
-e 's/^arg:\(.*[ ]signed\)$/type:\1/' \
-e 's/^arg:\(.*struct[ ][_a-zA-Z][_a-zA-Z0-9]*\)$/type:\1/' \
-e 's/^arg:\(.*\)[ ]_[_a-zA-Z0-9]*$/type:\1/' \
-e 's/^arg:\(.*\)[ ]\([^ ]*\)$/type:\1/' \
-e 's/^type://' >conftest.output
ac_cv_argtype_$2$3=`cat conftest.output`
changequote([, ])dnl
rm -f conftest*
])
AC_MSG_RESULT([$ac_cv_argtype_$2$3])
ac_type="$ac_cv_argtype_$2$3"
[$5]
])
dnl # Background:
dnl # this exists because of shortsightedness on the POSIX committee.
dnl # BSD systems used "int *" as the parameter to accept(2),
dnl # getsockname(2), getpeername(2) et al. Consequently many Unix
dnl # flavors took an "int *" for that parameter. The POSIX committee
dnl # decided that "int" was just too generic and had to be replaced
dnl # with "size_t" almost everywhere. There's no problem with that
dnl # when you're passing by value. But when you're passing by
dnl # reference (as it is the case for accept(2) and friends) this
dnl # creates a gross source incompatibility with existing programs.
dnl # On 32-bit architectures it creates only a warning. On 64-bit
dnl # architectures it creates broken code -- because "int *" is a
dnl # pointer to a 64-bit quantity and "size_t *" is usually a pointer
dnl # to a 32-bit quantity. Some Unix flavors adopted "size_t *" for
dnl # the sake of POSIX compliance. Others ignored it because it was
dnl # such a broken interface. Chaos ensued. POSIX finally woke up
dnl # and decided that it was wrong and created a new type socklen_t.
dnl # The only useful value for socklen_t is "int", and that's how
dnl # everyone who has a clue implements it. It is almost always the
dnl # case that this type should be defined to be an "int", unless the
dnl # system being compiled for was created in the window of POSIX
dnl # madness.
AC_DEFUN(AC_CHECK_SOCKLENTYPE,[dnl
AC_CHECK_TYPEDEF(socklen_t, sys/socket.h)
AC_CHECK_ARGTYPE(sys/types.h sys/socket.h, accept, 3, 3, [:])
AC_MSG_CHECKING(for fallback socklen_t)
AC_CACHE_VAL(ac_cv_check_socklentype, [
if test ".$ac_cv_typedef_socklen_t" = .yes; then
ac_cv_check_socklentype='socklen_t'
elif test ".$ac_type" != .; then
ac_cv_check_socklentype=`echo "$ac_type" | sed -e 's/[ ]*\*$//'`
else
ac_cv_check_socklentype='int'
fi
])
AC_MSG_RESULT([$ac_cv_check_socklentype])
ac_type="$ac_cv_check_socklentype"
ifelse([$1], , :, [$1])
])
|
