configure.in

wget (command line browser) source code

  dnl shl_load().
  AC_CHECK_LIB(dl,dlopen)
  AC_CHECK_LIB(dl,shl_load)

  ssl_success=no

  dnl Now try to find SSL libraries in each of the likely SSL roots.
  for ssl_root in $ssl_all_roots
  do
    if test x"$ssl_root" = x"system-default"; then
      dnl Try the default include and library locations.
      SSL_INCLUDES=
    else
      dnl Try this specific root.
      SSL_INCLUDES=-I$ssl_root/include
      dnl It's OK to use -R directly because libtool will
      dnl interpret it for us.
      LDFLAGS="-L$ssl_root/lib -R$ssl_root/lib $wget_save_LDFLAGS"
    fi

    AC_MSG_RESULT([Looking for SSL libraries in $ssl_root])

    dnl Check whether the compiler can find the include files.  On
    dnl some systems Gcc finds libraries in /usr/local/lib, but fails
    dnl to find the includes in /usr/local/include.

    ssl_found_includes=no
    CPPFLAGS="$SSL_INCLUDES $wget_save_CPPFLAGS"

    AC_MSG_CHECKING([for includes])

    AC_TRY_CPP([#include <openssl/ssl.h>
#include <openssl/rsa.h>
],
      AC_MSG_RESULT(found); ssl_found_includes=yes,
      AC_MSG_RESULT([not found])
    )

    if test x"$ssl_found_includes" = xno; then
      continue
    fi

    ssl_link_failure=no

    dnl Make sure that the checks don't run afoul of the cache.  It
    dnl would be nicer to temporarily turn off the cache, but
    dnl apparently Autoconf doesn't allow that.

    unset ac_cv_lib_crypto_RSA_new
    unset ac_cv_lib_ssl_SSL_new

    dnl These checks need to be in this order, or you'll get a link
    dnl failure if you use a static libcrypto.a and libssl.a rather
    dnl than shared libraries.

    AC_CHECK_LIB(crypto, RSA_new, , ssl_link_failure=yes)
    AC_CHECK_LIB(ssl, SSL_new, , ssl_link_failure=yes)

    if test x"$ssl_link_failure" = xyes; then
      dnl One or both libs failed to link.
      continue
    fi

    dnl The libraries link.  But we still need to check if the program
    dnl linked with those libraries under these settings with run.  On
    dnl some systems (Solaris), Gcc adds -L/usr/local/lib to the
    dnl linking line, but fails to add -R/usr/local/lib, thus creating
    dnl executables that link, but fail to run.

    dnl If we are cross-compiling, just assume that working linkage
    dnl implies working executable.

    ssl_run_failure=no

    AC_MSG_CHECKING([whether SSL libs are resolved at runtime])
    AC_TRY_RUN([
int RSA_new();
int SSL_new();
main(){return 0;}
],
      AC_MSG_RESULT(yes),
      AC_MSG_RESULT(no); ssl_run_failure=yes,
      AC_MSG_RESULT(cross)
    )

    if test x"$ssl_run_failure" = xno; then
      ssl_success=yes
      break
    fi
  done

  if test x"$ssl_success" = xyes; then
    dnl AC_MSG_RESULT doesn't look right here, but I'm not sure what
    dnl to use instead.
    AC_MSG_RESULT([Compiling in support for SSL in $ssl_root])
    AC_DEFINE(HAVE_SSL)
    AC_SUBST(SSL_INCLUDES)
    SSL_OBJ='gen_sslfunc$o'
    AC_SUBST(SSL_OBJ)
  else
    LDFLAGS=$wget_save_LDFLAGS
    LIBS=$wget_save_LIBS

    dnl If linking with SSL was forced rather than auto-detected, then
    dnl bail out if SSL failed.
    if test x"$wget_force_ssl" = x"yes"; then
      exec >&2
      echo "ERROR: Failed to find OpenSSL libraries."
      exit 2
    fi
  fi

  dnl Restore the compiler setting.
  CC=$wget_save_CC

  dnl Restore the CPPFLAGS.  Do this regardless of whether linking
  dnl with SSL succeeded -- SSL includes will be handled using
  dnl @SSL_INCLUDES@.
  CPPFLAGS=$wget_save_CPPFLAGS
fi

dnl
dnl Find an md5 implementation.
dnl

if test x"$wget_need_md5" = xyes
then
  MD5_OBJ='gen-md5$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.  md5_calc is, hopefully,
  dnl specific to the 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([whether md5.h can be included])
      AC_COMPILE_IFELSE([#include <md5.h>
                        ], [
        AC_MSG_RESULT(yes)
        AC_DEFINE(HAVE_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"$found_md5" = xno; then
    if test x"$ssl_success" = xyes; then
      AC_DEFINE(HAVE_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"$found_md5" = xno; then
    AC_DEFINE(HAVE_BUILTIN_MD5)
    MD5_OBJ="$MD5_OBJ gnu-md5\$o"
    found_md5=yes
    AC_MSG_NOTICE([using the GNU MD5 implementation])
  fi
fi
AC_DEFINE(HAVE_MD5)
AC_SUBST(MD5_OBJ)

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

ipv6=
check_for_ipv6=no
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])
    ipv6=no
    ;;
  *)
    ipv6=yes
    ;;
  esac],
  [check_for_ipv6=no]
)

if test "X$ipv6" = "Xyes" || test "X$check_for_ipv6" = "Xyes"; then
  AC_CHECK_FUNCS(getaddrinfo,[
    GETADDRINFO_AI_ADDRCONFIG(
      AC_DEFINE(
        [HAVE_GETADDRINFO_AI_ADDRCONFIG], 1, 
        [Define if the system headers support the AI_ADDRCONFIG flag.]
      )
    )
    GETADDRINFO_AI_V4MAPPED(
      AC_DEFINE(
        [HAVE_GETADDRINFO_AI_V4MAPPED], 1, 
        [Define if the system headers support the AI_V4MAPPED flag.]
      )
    )
    GETADDRINFO_AI_ALL(
      AC_DEFINE(
        [HAVE_GETADDRINFO_AI_ALL], 1, 
        [Define if the system headers support the AI_ALL flag.]
      )
    )
  ],[
    AC_MSG_NOTICE([Disabling IPv6 support: your system does not support getaddrinfo(3)])
    ipv6=no
  ])
fi
  
if test "X$ipv6" = "Xyes" || test "X$check_for_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$ipv6" = "Xyes" || test "X$check_for_ipv6" = "Xyes"; then
  TYPE_STRUCT_SOCKADDR_IN6([
    ipv6=yes
  ],[
    AC_MSG_NOTICE([Disabling IPv6 support: your system does not support 'struct sockaddr_in6'])
    ipv6=no
  ])
  if test "X$ipv6" = "Xyes"; then
    MEMBER_SIN6_SCOPE_ID
  fi
fi

if test "X$ipv6" = "Xyes"; then
  AC_DEFINE([ENABLE_IPV6], 1, [Define if IPv6 support is enabled.])
fi


dnl
dnl Set of available languages.
dnl
ALL_LINGUAS=`(cd ${srcdir}/po && ls *.po | sed -e 's/\.po$//' | tr '\012' ' ')`

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 internationalization macros
WGET_WITH_NLS

dnl
dnl Find makeinfo.  If makeinfo is not found, look for Emacs.  If
dnl Emacs cannot be found, look for XEmacs.
dnl

AC_CHECK_PROGS(MAKEINFO, makeinfo emacs xemacs)

case "${MAKEINFO}" in
   *makeinfo) MAKEINFO="${MAKEINFO} \$(srcdir)/wget.texi"  ;;
   *emacs | *xemacs) MAKEINFO="${MAKEINFO} -batch -q -no-site-file -eval '(find-file \"\$(srcdir)/wget.texi\")' -l texinfmt -f texinfo-format-buffer -f save-buffer"  ;;
   *) MAKEINFO="makeinfo \$(srcdir)/wget.texi"            ;;
esac

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_OUTPUT([Makefile src/Makefile doc/Makefile util/Makefile po/Makefile.in
           windows/Makefile],
[WGET_PROCESS_PO
test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h])