wget/configure.in

dnl Template file for GNU Autoconf
dnl Copyright (C) 1995, 1996, 1997, 2001 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 2 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, write to the Free Software
dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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 Process this file with autoconf to produce a configure script.
dnl

AC_INIT([src/version.c])
AC_PREREQ(2.59)

dnl Include the M4 macros we use.
builtin(include, [m4/wget.m4])dnl
builtin(include, [m4/lib-ld.m4])dnl
builtin(include, [m4/lib-link.m4])dnl
builtin(include, [m4/lib-prefix.m4])dnl

dnl
dnl What version of Wget are we building?
dnl
VERSION=`sed -e 's/^.*"\(.*\)";$/\1/' ${srcdir}/src/version.c`
AC_MSG_NOTICE([configuring for GNU Wget $VERSION])
AC_SUBST(VERSION)
PACKAGE=wget
AC_SUBST(PACKAGE)

dnl
dnl Get cannonical host
dnl
AC_CANONICAL_HOST
AC_DEFINE_UNQUOTED([OS_TYPE], "$host_os",
                   [Define to be the name of the operating system.])

dnl
dnl Process features.
dnl

AC_ARG_WITH(ssl,
[[  --without-ssl           disable SSL autodetection]])

AC_ARG_ENABLE(opie,
[  --disable-opie          disable support for opie or s/key FTP login],
ENABLE_OPIE=$enableval, ENABLE_OPIE=yes)
test x"${ENABLE_OPIE}" = xyes && AC_DEFINE([ENABLE_OPIE], 1,
   [Define if you want the Opie support for FTP compiled in.])

AC_ARG_ENABLE(digest,
[  --disable-digest        disable support for HTTP digest authorization],
ENABLE_DIGEST=$enableval, ENABLE_DIGEST=yes)
test x"${ENABLE_DIGEST}" = xyes && AC_DEFINE([ENABLE_DIGEST], 1,
   [Define if you want the HTTP Digest Authorization compiled in.])

AC_ARG_ENABLE(ntlm,
[  --disable-ntlm          disable support for NTLM authorization],
[ENABLE_NTLM=$enableval], [ENABLE_NTLM=auto])

AC_ARG_ENABLE(debug,
[  --disable-debug         disable support for debugging output],
ENABLE_DEBUG=$enableval, ENABLE_DEBUG=yes)
test x"${ENABLE_DEBUG}" = xyes && AC_DEFINE([ENABLE_DEBUG], 1,
   [Define if you want the debug output support compiled in.])

wget_need_md5=no

case "${ENABLE_OPIE}${ENABLE_DIGEST}" in
*yes*)
	wget_need_md5=yes
esac
if test x"$ENABLE_OPIE" = xyes; then
  OPIE_OBJ='ftp-opie.o'
fi
AC_SUBST(OPIE_OBJ)

dnl
dnl Whether make sets $(MAKE)...
dnl
AC_PROG_MAKE_SET

dnl
dnl Find a good install
dnl
AC_PROG_INSTALL

dnl
dnl Find the compiler
dnl

dnl We want these before the checks, so the checks can modify their values.
test -z "$CFLAGS"  && CFLAGS= auto_cflags=1
test -z "$CC" && cc_specified=yes

AC_PROG_CC
AC_AIX

dnl Turn on optimization by default.  Specifically:
dnl
dnl if the user hasn't specified CFLAGS, then
dnl   if compiler is gcc, then
dnl     use -O2 and some warning flags
dnl   else
dnl     use os-specific flags or -O
if test -n "$auto_cflags"; then
  if test -n "$GCC"; then
    CFLAGS="$CFLAGS -O2 -Wall -Wno-implicit"
  else
    case "$host_os" in
      *hpux*)  CFLAGS="$CFLAGS +O3"                      ;;
      *ultrix* | *osf*) CFLAGS="$CFLAGS -O -Olimit 2000" ;;
      *)       CFLAGS="$CFLAGS -O" ;;
    esac
  fi
fi

dnl
dnl In case of {cyg,gnu}win32.  Should be a _target_ test.
dnl Might also be erelevant for DJGPP.
dnl
case "$host_os" in
  *win32) exeext='.exe';;
  *) exeext='';;
esac
AC_SUBST(exeext)

dnl
dnl Checks for basic compiler characteristics.
dnl
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE

dnl Check for basic headers, even though we expect them to exist and
dnl #include them unconditionally in the code.  Their detection is
dnl still needed because test programs used by Autoconf macros check
dnl for STDC_HEADERS, HAVE_SYS_TYPES_H, etc. before using them.
dnl Without the checks they will fail to be included in test programs,
dnl which will subsequently fail.
AC_HEADER_STDC

dnl Check for large file support.  This check needs to come fairly
dnl early because it could (in principle) affect whether functions and
dnl headers are available, whether they work, etc.
AC_SYS_LARGEFILE
AC_CHECK_SIZEOF(off_t)

dnl
dnl Checks for system header files that might be missing.
dnl
AC_HEADER_STDBOOL
AC_CHECK_HEADERS(unistd.h sys/time.h)
AC_CHECK_HEADERS(termios.h sys/ioctl.h sys/select.h utime.h sys/utime.h)
AC_CHECK_HEADERS(stdint.h inttypes.h pwd.h)

dnl
dnl Check sizes of integer types.  These are used to find n-bit
dnl integral types on older systems that fail to provide intN_t and
dnl uintN_t typedefs.
dnl
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)

dnl
dnl Checks for non-universal or system-specific types.
dnl
AC_TYPE_SIZE_T
AC_TYPE_PID_T
AC_CHECK_TYPES(uint32_t)
AC_CHECK_TYPES(sig_atomic_t, [], [], [
#include <stdio.h>
#include <sys/types.h>
#if HAVE_INTTYPES_H
# include <inttypes.h>
#endif
#include <signal.h>
])

dnl
dnl Checks for library functions.
dnl
AC_FUNC_ALLOCA
AC_FUNC_MMAP
AC_FUNC_FSEEKO
AC_CHECK_FUNCS(strptime timegm snprintf vsnprintf drand48)
AC_CHECK_FUNCS(usleep ftello sigblock sigsetjmp symlink)

dnl We expect to have these functions on Unix-like systems configure
dnl runs on.  The defines are provided to get them in config.h.in so
dnl Wget can still be ported to non-Unix systems (such as Windows)
dnl that lack some of these functions.
AC_DEFINE([HAVE_STRCASECMP], 1, [Define to 1 if you have the `strcasecmp' function.])
AC_DEFINE([HAVE_STRNCASECMP], 1, [Define to 1 if you have the `strncasecmp' function.])
AC_DEFINE([HAVE_STRDUP], 1, [Define to 1 if you have the `strdup' function.])
AC_DEFINE([HAVE_ISATTY], 1, [Define to 1 if you have the `isatty' function.])
AC_DEFINE([HAVE_SYMLINK], 1, [Define to 1 if you have the `symlink' function.])

dnl
dnl Call Wget-specific macros defined in aclocal.
dnl
WGET_STRUCT_UTIMBUF
WGET_SOCKLEN_T
WGET_FNMATCH
WGET_NANOSLEEP
WGET_POSIX_CLOCK
WGET_NSL_SOCKET

dnl
dnl Check if we need to compile in getopt.c.
dnl
AC_CHECK_FUNC(getopt_long, [], [
  GETOPT_OBJ='getopt.o'
])
AC_SUBST(GETOPT_OBJ)

dnl
dnl Checks for libraries.
dnl

if test x"$with_ssl" = xgnutls
then
  dnl Now actually check for -lssl
  AC_LIB_HAVE_LINKFLAGS([gnutls], [], [
#include <gnutls/gnutls.h>
  ], [gnutls_global_init()])
  if test x"$LIBGNUTLS" != x
  then
    AC_MSG_NOTICE([compiling in support for SSL via GnuTLS])
    AC_DEFINE([HAVE_GNUTLS], 1,
	      [Define if support for the GnuTLS library is being compiled in.])
    SSL_OBJ='gnutls.o'
  fi
else
  dnl As of this writing (OpenSSL 0.9.6), the libcrypto shared library
  dnl doesn't record its dependency on libdl, so we need to make sure
  dnl -ldl ends up in LIBS on systems that have it.  Most OSes use
  dnl dlopen(), but HP-UX uses dnl shl_load().
  AC_CHECK_LIB(dl, dlopen, [], [
    AC_CHECK_LIB(dl, shl_load)
  ])

  dnl Now actually check for -lssl
  AC_LIB_HAVE_LINKFLAGS([ssl], [crypto], [
#include <openssl/ssl.h>
#include <openssl/x509.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/des.h>
#include <openssl/md4.h>
#include <openssl/md5.h>
  ], [SSL_library_init ()])
  if test x"$LIBSSL" != x
  then
    AC_MSG_NOTICE([compiling in support for SSL via OpenSSL])
    AC_DEFINE([HAVE_OPENSSL], 1,
	      [Define if support for the OpenSSL library is being compiled in.])
    SSL_OBJ='openssl.o'
  fi
fi

AC_SUBST(SSL_OBJ)

dnl Enable NTLM if requested and if SSL is available.
NTLM_OBJ=''
if test x"$LIBSSL" != x
then
  if test x"$ENABLE_NTLM" != xno
  then
    AC_DEFINE([ENABLE_NTLM], 1,
     [Define if you want the NTLM authorization support compiled in.])
    NTLM_OBJ='http-ntlm.o'
  fi
else
  dnl If SSL is unavailable and the user explicitly requested NTLM,
  dnl abort.
  if test x"$ENABLE_NTLM" = xyes
  then
    AC_MSG_ERROR([NTLM authorization requested and OpenSSL not found; aborting])
  fi
fi
AC_SUBST(NTLM_OBJ)

dnl
dnl Find an MD5 implementation.  Since Wget rarely needs MD5, we try
dnl to use an existing library implementation to save on code size.
dnl

if test x"$wget_need_md5" = xyes
then
  dnl This should be moved to an AC_DEFUN, but I'm not sure how to
  dnl manipulate MD5_OBJ from the defun.

  MD5_OBJ='gen-md5.o'
  found_md5=no

  dnl Check for the system MD5 library on Solaris.  We don't check for
  dnl something simple like "MD5Update" because there are a number of
  dnl MD5 implementations that use that name, but have an otherwise
  dnl incompatible interface.  md5_calc is, hopefully, specific to the
  dnl Solaris MD5 library.
  if test x"$found_md5" = xno; then
    AC_CHECK_LIB(md5, md5_calc, [
      dnl Some installations have bogus <md5.h> in the compiler's
      dnl include path, making the system md5 library useless.
      AC_MSG_CHECKING([for working md5.h])
      AC_COMPILE_IFELSE([#include <md5.h>
                        ], [
        AC_MSG_RESULT(yes)
        AC_DEFINE([HAVE_SOLARIS_MD5], 1, [Define when using Solaris MD5.])
        LIBS="-lmd5 $LIBS"
        found_md5=yes
        AC_MSG_NOTICE([using the Solaris MD5 implementation])
      ], [AC_MSG_RESULT(no)])
    ])
  fi

  dnl Then see if we're linking OpenSSL anyway; if yes, use its md5
  dnl implementation.
  if test x"$found_md5" = xno; then
    if test x"$LIBSSL" != x; then
      AC_DEFINE([HAVE_OPENSSL_MD5], 1, [Define when using OpenSSL MD5.])
      found_md5=yes
      AC_MSG_NOTICE([using the OpenSSL MD5 implementation])
    fi
  fi

  dnl If none of the above worked, use the one we ship with Wget.
  if test x"$found_md5" = xno; then
    AC_DEFINE([HAVE_BUILTIN_MD5], 1, [Define when using built-in MD5.])
    MD5_OBJ="$MD5_OBJ gnu-md5.o"
    found_md5=yes
    AC_MSG_NOTICE([using the built-in (GNU) MD5 implementation])
    AC_C_BIGENDIAN
  fi
fi
AC_DEFINE([HAVE_MD5], 1, [Define if we're compiling support for MD5.])
AC_SUBST(MD5_OBJ)

dnl **********************************************************************
dnl Checks for IPv6
dnl **********************************************************************

dnl
dnl We test for IPv6 by checking, in turn, for availability of
dnl getaddrinfo, presence of the INET6 address/protocol family, and
dnl the existence of struct sockaddr_in6.  If any of them is missing,
dnl IPv6 is disabled, and the code reverts to old-style gethostbyname.
dnl
dnl If --enable-ipv6 is explicitly specified on the configure command
dnl line, we check for IPv6 and abort if not found.  If --disable-ipv6
dnl is specified, we disable IPv6 and don't check for it.  The default
dnl is to autodetect IPv6 and use it where available.
dnl

AC_ARG_ENABLE(ipv6,
  AC_HELP_STRING([--disable-ipv6],[disable IPv6 support]),
  [case "${enable_ipv6}" in
    no)
      AC_MSG_NOTICE([disabling IPv6 at user request])
      dnl Disable IPv6 checking
      ipv6=no
      ;;
    yes)
      dnl IPv6 explicitly enabled: force its use (abort if unavailable).
      ipv6=yes
      force_ipv6=yes
      ;;
    auto)
      dnl Auto-detect IPv6, i.e. check for IPv6, but don't force it.
      ipv6=yes
      ;;
    *)
      AC_MSG_ERROR([Invalid --enable-ipv6 argument \`$enable_ipv6'])
      ;;
    esac
  ], [
    dnl If nothing is specified, assume auto-detection.
    ipv6=yes
  ]
)

if test "X$ipv6" = "Xyes"; then
  AC_CHECK_FUNCS(getaddrinfo, [], [
    AC_MSG_NOTICE([Disabling IPv6 support: your system does not support getaddrinfo(3)])
    ipv6=no
  ])
fi

if test "X$ipv6" = "Xyes"; then
  PROTO_INET6([], [
    AC_MSG_NOTICE([Disabling IPv6 support: your system does not support the PF_INET6 protocol family])
    ipv6=no
  ])
fi

if test "X$ipv6" = "Xyes"; then
  TYPE_STRUCT_SOCKADDR_IN6([],[
    AC_MSG_NOTICE([Disabling IPv6 support: your system does not support \`struct sockaddr_in6'])
    ipv6=no
  ])
  if test "X$ipv6" = "Xyes"; then
    WGET_STRUCT_SOCKADDR_STORAGE
    MEMBER_SIN6_SCOPE_ID
  fi
fi

if test "X$ipv6" = "Xyes"; then
  AC_DEFINE([ENABLE_IPV6], 1, [Define if IPv6 support is enabled.])
  AC_MSG_NOTICE([Enabling support for IPv6.])
elif test "x$force_ipv6" = "xyes"; then
  AC_MSG_ERROR([IPv6 support requested but not found; aborting])
fi


dnl
dnl Set of available languages.
dnl
dnl Originally this used to be static, looking like this:
dnl     ALL_LINGUAS="cs de hr it ..."
dnl The downside was that configure needed to be rebuilt whenever a
dnl new language was added.
dnl
ALL_LINGUAS=`(cd ${srcdir}/po && ls *.po | sed -e 's/\.po$//' | tr '\012' ' ')`

dnl internationalization macros
WGET_WITH_NLS

dnl
dnl Find makeinfo.  We used to provide support for Emacs processing
dnl Texinfo using `emacs -batch -eval ...' where makeinfo is
dnl unavailable, but that broke with the addition of makeinfo-specific
dnl command-line options, such as `-I'.  Now we depend on makeinfo to
dnl build the Info documentation.
dnl

AC_CHECK_PROGS(MAKEINFO, [makeinfo], [true])

dnl
dnl Find perl and pod2man
dnl

AC_PATH_PROGS(PERL, [perl5 perl], no)
AC_PATH_PROG(POD2MAN, pod2man, no)

if test "x${POD2MAN}" = xno; then
  COMMENT_IF_NO_POD2MAN="# "
else
  COMMENT_IF_NO_POD2MAN=
fi
AC_SUBST(COMMENT_IF_NO_POD2MAN)

dnl
dnl Create output
dnl
AC_CONFIG_FILES([Makefile src/Makefile doc/Makefile util/Makefile
                 po/Makefile.in windows/Makefile])
AC_CONFIG_HEADERS([src/config.h])
AH_BOTTOM([
#include "config-post.h"
])
AC_CONFIG_FILES([stamp-h], [echo timestamp > stamp-h])
AC_CONFIG_COMMANDS([default], [WGET_PROCESS_PO])
AC_OUTPUT