wget/m4/wget.m4

dnl Wget-specific Autoconf macros.
dnl Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
dnl 2004, 2005, 2006, 2007 Free Software Foundation, Inc.

dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 3 of the License, or
dnl (at your option) any later version.

dnl This program 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
dnl GNU General Public License for more details.

dnl You should have received a copy of the GNU General Public License
dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.

dnl In addition, as a special exception, the Free Software Foundation
dnl gives permission to link the code of its release of Wget with the
dnl OpenSSL project's "OpenSSL" library (or with modified versions of it
dnl that use the same license as the "OpenSSL" library), and distribute
dnl the linked executables.  You must obey the GNU General Public License
dnl in all respects for all of the code used other than "OpenSSL".  If you
dnl modify this file, you may extend this exception to your version of the
dnl file, but you are not obligated to do so.  If you do not wish to do
dnl so, delete this exception statement from your version.

dnl
dnl Check for `struct utimbuf'.
dnl

AC_DEFUN([WGET_STRUCT_UTIMBUF], [
  AC_CHECK_TYPES([struct utimbuf], [], [], [
#include <stdio.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_UTIME_H
# include <utime.h>
#endif
  ])
])


dnl Check for socklen_t.  The third argument of accept, getsockname,
dnl etc. is int * on some systems, but size_t * on others.  POSIX
dnl finally standardized on socklen_t, but older systems don't have
dnl it.  If socklen_t exists, we use it, else if accept() accepts
dnl size_t *, we use that, else we use int.

AC_DEFUN([WGET_SOCKLEN_T], [
  AC_MSG_CHECKING(for socklen_t)
  AC_COMPILE_IFELSE([
#include <sys/types.h>
#include <sys/socket.h>
socklen_t x;
  ], [AC_MSG_RESULT(socklen_t)], [
    AC_COMPILE_IFELSE([
#include <sys/types.h>
#include <sys/socket.h>
int accept (int, struct sockaddr *, size_t *);
    ], [
      AC_MSG_RESULT(size_t)
      AC_DEFINE([socklen_t], [size_t],
                [Define to int or size_t on systems without socklen_t.])
    ], [
      AC_MSG_RESULT(int)
      AC_DEFINE([socklen_t], [int],
                [Define to int or size_t on systems without socklen_t.])
    ])
  ])
])

dnl Check whether fnmatch.h can be included.  This doesn't use
dnl AC_FUNC_FNMATCH because Wget is already careful to only use
dnl fnmatch on certain OS'es.  However, fnmatch.h is sometimes broken
dnl even on those because Apache installs its own fnmatch.h to
dnl /usr/local/include (!), which GCC uses before /usr/include.

AC_DEFUN([WGET_FNMATCH], [
  AC_MSG_CHECKING([for working fnmatch.h])
  AC_COMPILE_IFELSE([#include <fnmatch.h>
                    ], [
    AC_MSG_RESULT(yes)
    AC_DEFINE([HAVE_WORKING_FNMATCH_H], 1,
              [Define if fnmatch.h can be included.])
  ], [
    AC_MSG_RESULT(no)
  ])
])

dnl Check for nanosleep.  For nanosleep to work on Solaris, we must
dnl link with -lrt (recently) or with -lposix4 (older releases).

AC_DEFUN([WGET_NANOSLEEP], [
  AC_CHECK_FUNCS(nanosleep, [], [
    AC_CHECK_LIB(rt, nanosleep, [
      AC_DEFINE([HAVE_NANOSLEEP], 1,
                [Define if you have the nanosleep function.])
      LIBS="-lrt $LIBS"
    ], [
      AC_CHECK_LIB(posix4, nanosleep, [
	AC_DEFINE([HAVE_NANOSLEEP], 1,
		  [Define if you have the nanosleep function.])
	LIBS="-lposix4 $LIBS"
      ])
    ])
  ])
])

AC_DEFUN([WGET_POSIX_CLOCK], [
  AC_CHECK_FUNCS(clock_gettime, [], [
    AC_CHECK_LIB(rt, clock_gettime)
  ])
])

dnl Check whether we need to link with -lnsl and -lsocket, as is the
dnl case on e.g. Solaris.

AC_DEFUN([WGET_NSL_SOCKET], [
  dnl On Solaris, -lnsl is needed to use gethostbyname.  But checking
  dnl for gethostbyname is not enough because on "NCR MP-RAS 3.0"
  dnl gethostbyname is in libc, but -lnsl is still needed to use
  dnl -lsocket, as well as for functions such as inet_ntoa.  We look
  dnl for such known offenders and if one of them is not found, we
  dnl check if -lnsl is needed.
  wget_check_in_nsl=NONE
  AC_CHECK_FUNCS(gethostbyname, [], [
    wget_check_in_nsl=gethostbyname
  ])
  AC_CHECK_FUNCS(inet_ntoa, [], [
    wget_check_in_nsl=inet_ntoa
  ])
  if test $wget_check_in_nsl != NONE; then
    AC_CHECK_LIB(nsl, $wget_check_in_nsl)
  fi
  AC_CHECK_LIB(socket, socket)
])


dnl ************************************************************
dnl START OF IPv6 AUTOCONFIGURATION SUPPORT MACROS
dnl ************************************************************

AC_DEFUN([TYPE_STRUCT_SOCKADDR_IN6],[
  wget_have_sockaddr_in6=
  AC_CHECK_TYPES([struct sockaddr_in6],[
    wget_have_sockaddr_in6=yes
  ],[
    wget_have_sockaddr_in6=no
  ],[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
  ])

  if test "X$wget_have_sockaddr_in6" = "Xyes"; then :
    $1
  else :
    $2
  fi
])


AC_DEFUN([MEMBER_SIN6_SCOPE_ID],[
  AC_REQUIRE([TYPE_STRUCT_SOCKADDR_IN6])
  
  wget_member_sin6_scope_id=
  if test "X$wget_have_sockaddr_in6" = "Xyes"; then
    AC_CHECK_MEMBER([struct sockaddr_in6.sin6_scope_id],[
      wget_member_sin6_scope_id=yes
    ],[
      wget_member_sin6_scope_id=no
    ],[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
    ])
  fi

  if test "X$wget_member_sin6_scope_id" = "Xyes"; then
    AC_DEFINE([HAVE_SOCKADDR_IN6_SCOPE_ID], 1,
      [Define if struct sockaddr_in6 has the sin6_scope_id member])
    $1
  else :
    $2
  fi
])


AC_DEFUN([PROTO_INET6],[
  AC_CACHE_CHECK([for INET6 protocol support], [wget_cv_proto_inet6],[
    AC_TRY_CPP([
#include <sys/types.h>
#include <sys/socket.h>

#ifndef PF_INET6
#error Missing PF_INET6
#endif
#ifndef AF_INET6
#error Mlssing AF_INET6
#endif
    ],[
      wget_cv_proto_inet6=yes
    ],[
      wget_cv_proto_inet6=no
    ])
  ])

  if test "X$wget_cv_proto_inet6" = "Xyes"; then :
    $1
  else :
    $2
  fi
])


AC_DEFUN([WGET_STRUCT_SOCKADDR_STORAGE],[
  AC_CHECK_TYPES([struct sockaddr_storage],[], [], [
#include <sys/types.h>
#include <sys/socket.h>
  ])
])

dnl ************************************************************
dnl END OF IPv6 AUTOCONFIGURATION SUPPORT MACROS
dnl ************************************************************

dnl AM_PATH_PROG_WITH_TEST(VARIABLE, PROG-TO-CHECK-FOR,
dnl   TEST-PERFORMED-ON-FOUND_PROGRAM [, VALUE-IF-NOT-FOUND [, PATH]])
AC_DEFUN([AM_PATH_PROG_WITH_TEST],
[# Extract the first word of "$2", so it can be a program name with args.
set dummy $2; ac_word=[$]2
AC_MSG_CHECKING([for $ac_word])
AC_CACHE_VAL(ac_cv_path_$1,
[case "[$]$1" in
  /*)
  ac_cv_path_$1="[$]$1" # Let the user override the test with a path.
  ;;
  *)
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
  for ac_dir in ifelse([$5], , $PATH, [$5]); do
    test -z "$ac_dir" && ac_dir=.
    if test -f $ac_dir/$ac_word; then
      if [$3]; then
	ac_cv_path_$1="$ac_dir/$ac_word"
	break
      fi
    fi
  done
  IFS="$ac_save_ifs"
dnl If no 4th arg is given, leave the cache variable unset,
dnl so AC_PATH_PROGS will keep looking.
ifelse([$4], , , [  test -z "[$]ac_cv_path_$1" && ac_cv_path_$1="$4"
])dnl
  ;;
esac])dnl
$1="$ac_cv_path_$1"
if test -n "[$]$1"; then
  AC_MSG_RESULT([$]$1)
else
  AC_MSG_RESULT(no)
fi
AC_SUBST($1)dnl
])