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diff --git a/m4/libgnurl.m4 b/m4/libgnurl.m4
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+# LIBGNURL_CHECK_CONFIG ([DEFAULT-ACTION], [MINIMUM-VERSION],
+# [ACTION-IF-YES], [ACTION-IF-NO])
+# ----------------------------------------------------------
+# David Shaw <dshaw@jabberwocky.com> May-09-2006
+#
+# Checks for libgnurl. DEFAULT-ACTION is the string yes or no to
+# specify whether to default to --with-libgnurl or --without-libgnurl.
+# If not supplied, DEFAULT-ACTION is yes. MINIMUM-VERSION is the
+# minimum version of libgnurl to accept. Pass the version as a regular
+# version number like 7.10.1. If not supplied, any version is
+# accepted. ACTION-IF-YES is a list of shell commands to run if
+# libgnurl was successfully found and passed the various tests.
+# ACTION-IF-NO is a list of shell commands that are run otherwise.
+# Note that using --without-libgnurl does run ACTION-IF-NO.
+#
+# This macro #defines HAVE_LIBGNURL if a working libgnurl setup is
+# found, and sets @LIBGNURL@ and @LIBGNURL_CPPFLAGS@ to the necessary
+# values. Other useful defines are LIBGNURL_FEATURE_xxx where xxx are
+# the various features supported by libgnurl, and LIBGNURL_PROTOCOL_yyy
+# where yyy are the various protocols supported by libgnurl. Both xxx
+# and yyy are capitalized. See the list of AH_TEMPLATEs at the top of
+# the macro for the complete list of possible defines. Shell
+# variables $libgnurl_feature_xxx and $libgnurl_protocol_yyy are also
+# defined to 'yes' for those features and protocols that were found.
+# Note that xxx and yyy keep the same capitalization as in the
+# gnurl-config list (e.g. it's "HTTP" and not "http").
+#
+# Users may override the detected values by doing something like:
+# LIBGNURL="-lgnurl" LIBGNURL_CPPFLAGS="-I/usr/myinclude" ./configure
+#
+# For the sake of sanity, this macro assumes that any libgnurl that is
+# found is after version 7.7.2, the first version that included the
+# gnurl-config script. Note that it is very important for people
+# packaging binary versions of libgnurl to include this script!
+# Without gnurl-config, we can only guess what protocols are available,
+# or use gnurl_version_info to figure it out at runtime.
+
+AC_DEFUN([LIBGNURL_CHECK_CONFIG],
+[
+ AH_TEMPLATE([LIBGNURL_FEATURE_SSL],[Defined if libgnurl supports SSL])
+ AH_TEMPLATE([LIBGNURL_FEATURE_KRB4],[Defined if libgnurl supports KRB4])
+ AH_TEMPLATE([LIBGNURL_FEATURE_IPV6],[Defined if libgnurl supports IPv6])
+ AH_TEMPLATE([LIBGNURL_FEATURE_LIBZ],[Defined if libgnurl supports libz])
+ AH_TEMPLATE([LIBGNURL_FEATURE_ASYNCHDNS],[Defined if libgnurl supports AsynchDNS])
+ AH_TEMPLATE([LIBGNURL_FEATURE_IDN],[Defined if libgnurl supports IDN])
+ AH_TEMPLATE([LIBGNURL_FEATURE_SSPI],[Defined if libgnurl supports SSPI])
+ AH_TEMPLATE([LIBGNURL_FEATURE_NTLM],[Defined if libgnurl supports NTLM])
+
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_HTTP],[Defined if libgnurl supports HTTP])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_HTTPS],[Defined if libgnurl supports HTTPS])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_FTP],[Defined if libgnurl supports FTP])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_FTPS],[Defined if libgnurl supports FTPS])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_FILE],[Defined if libgnurl supports FILE])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_TELNET],[Defined if libgnurl supports TELNET])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_LDAP],[Defined if libgnurl supports LDAP])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_DICT],[Defined if libgnurl supports DICT])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_TFTP],[Defined if libgnurl supports TFTP])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_RTSP],[Defined if libgnurl supports RTSP])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_POP3],[Defined if libgnurl supports POP3])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_IMAP],[Defined if libgnurl supports IMAP])
+ AH_TEMPLATE([LIBGNURL_PROTOCOL_SMTP],[Defined if libgnurl supports SMTP])
+
+ AC_ARG_WITH(libgnurl,
+ AC_HELP_STRING([--with-libgnurl=PREFIX],[look for the gnurl library in PREFIX/lib and headers in PREFIX/include]),
+ [_libgnurl_with=$withval],[_libgnurl_with=ifelse([$1],,[yes],[$1])])
+
+ if test "$_libgnurl_with" != "no" ; then
+
+ AC_PROG_AWK
+
+ _libgnurl_version_parse="eval $AWK '{split(\$NF,A,\".\"); X=256*256*A[[1]]+256*A[[2]]+A[[3]]; print X;}'"
+
+ _libgnurl_try_link=yes
+
+ if test -d "$_libgnurl_with" ; then
+ LIBGNURL_CPPFLAGS="-I$withval/include"
+ _libgnurl_ldflags="-L$withval/lib"
+ AC_PATH_PROG([_libgnurl_config],[gnurl-config],[],
+ ["$withval/bin"])
+ else
+ AC_PATH_PROG([_libgnurl_config],[gnurl-config],[],[$PATH])
+ fi
+
+ if test x$_libgnurl_config != "x" ; then
+ AC_CACHE_CHECK([for the version of libgnurl],
+ [libgnurl_cv_lib_gnurl_version],
+ [libgnurl_cv_lib_gnurl_version=`$_libgnurl_config --version | $AWK '{print $[]2}'`])
+
+ _libgnurl_version=`echo $libgnurl_cv_lib_gnurl_version | $_libgnurl_version_parse`
+ _libgnurl_wanted=`echo ifelse([$2],,[0],[$2]) | $_libgnurl_version_parse`
+
+ if test $_libgnurl_wanted -gt 0 ; then
+ AC_CACHE_CHECK([for libgnurl >= version $2],
+ [libgnurl_cv_lib_version_ok],
+ [
+ if test $_libgnurl_version -ge $_libgnurl_wanted ; then
+ libgnurl_cv_lib_version_ok=yes
+ else
+ libgnurl_cv_lib_version_ok=no
+ fi
+ ])
+ fi
+
+ if test $_libgnurl_wanted -eq 0 || test x$libgnurl_cv_lib_version_ok = xyes ; then
+ if test x"$LIBGNURL_CPPFLAGS" = "x" ; then
+ LIBGNURL_CPPFLAGS=`$_libgnurl_config --cflags`
+ fi
+ if test x"$LIBGNURL" = "x" ; then
+ LIBGNURL=`$_libgnurl_config --libs`
+
+ # This is so silly, but Apple actually has a bug in their
+ # gnurl-config script. Fixed in Tiger, but there are still
+ # lots of Panther installs around.
+ case "${host}" in
+ powerpc-apple-darwin7*)
+ LIBGNURL=`echo $LIBGNURL | sed -e 's|-arch i386||g'`
+ ;;
+ esac
+ fi
+
+ # All gnurl-config scripts support --feature
+ _libgnurl_features=`$_libgnurl_config --feature`
+
+ # Is it modern enough to have --protocols? (7.12.4)
+ if test $_libgnurl_version -ge 461828 ; then
+ _libgnurl_protocols=`$_libgnurl_config --protocols`
+ fi
+ else
+ _libgnurl_try_link=no
+ fi
+
+ unset _libgnurl_wanted
+ fi
+
+ if test $_libgnurl_try_link = yes ; then
+
+ # we didn't find gnurl-config, so let's see if the user-supplied
+ # link line (or failing that, "-lgnurl") is enough.
+ LIBGNURL=${LIBGNURL-"$_libgnurl_ldflags -lgnurl"}
+
+ AC_CACHE_CHECK([whether libgnurl is usable],
+ [libgnurl_cv_lib_gnurl_usable],
+ [
+ _libgnurl_save_cppflags=$CPPFLAGS
+ CPPFLAGS="$LIBGNURL_CPPFLAGS $CPPFLAGS"
+ _libgnurl_save_libs=$LIBS
+ LIBS="$LIBGNURL $LIBS"
+
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <curl/curl.h>],[
+/* Try and use a few common options to force a failure if we are
+ missing symbols or can't link. */
+int x;
+gnurl_easy_setopt(NULL,GNURLOPT_URL,NULL);
+x=GNURL_ERROR_SIZE;
+x=GNURLOPT_WRITEFUNCTION;
+x=GNURLOPT_FILE;
+x=GNURLOPT_ERRORBUFFER;
+x=GNURLOPT_STDERR;
+x=GNURLOPT_VERBOSE;
+])],libgnurl_cv_lib_gnurl_usable=yes,libgnurl_cv_lib_gnurl_usable=no)
+
+ CPPFLAGS=$_libgnurl_save_cppflags
+ LIBS=$_libgnurl_save_libs
+ unset _libgnurl_save_cppflags
+ unset _libgnurl_save_libs
+ ])
+
+ if test $libgnurl_cv_lib_gnurl_usable = yes ; then
+
+ # Does gnurl_free() exist in this version of libgnurl?
+ # If not, fake it with free()
+
+ _libgnurl_save_cppflags=$CPPFLAGS
+ CPPFLAGS="$CPPFLAGS $LIBGNURL_CPPFLAGS"
+ _libgnurl_save_libs=$LIBS
+ LIBS="$LIBS $LIBGNURL"
+
+ AC_CHECK_FUNC(gnurl_free,,
+ AC_DEFINE(gnurl_free,free,
+ [Define gnurl_free() as free() if our version of gnurl lacks gnurl_free.]))
+
+ CPPFLAGS=$_libgnurl_save_cppflags
+ LIBS=$_libgnurl_save_libs
+ unset _libgnurl_save_cppflags
+ unset _libgnurl_save_libs
+
+ AC_DEFINE(HAVE_LIBGNURL,1,
+ [Define to 1 if you have a functional gnurl library.])
+ AC_SUBST(LIBGNURL_CPPFLAGS)
+ AC_SUBST(LIBGNURL)
+
+ for _libgnurl_feature in $_libgnurl_features ; do
+ AC_DEFINE_UNQUOTED(AS_TR_CPP(libgnurl_feature_$_libgnurl_feature),[1])
+ eval AS_TR_SH(libgnurl_feature_$_libgnurl_feature)=yes
+ done
+
+ if test "x$_libgnurl_protocols" = "x" ; then
+
+ # We don't have --protocols, so just assume that all
+ # protocols are available
+ _libgnurl_protocols="HTTP FTP FILE TELNET LDAP DICT TFTP"
+
+ if test x$libgnurl_feature_SSL = xyes ; then
+ _libgnurl_protocols="$_libgnurl_protocols HTTPS"
+
+ # FTPS wasn't standards-compliant until version
+ # 7.11.0 (0x070b00 == 461568)
+ if test $_libgnurl_version -ge 461568; then
+ _libgnurl_protocols="$_libgnurl_protocols FTPS"
+ fi
+ fi
+
+ # RTSP, IMAP, POP3 and SMTP were added in
+ # 7.20.0 (0x071400 == 463872)
+ if test $_libgnurl_version -ge 463872; then
+ _libgnurl_protocols="$_libgnurl_protocols RTSP IMAP POP3 SMTP"
+ fi
+ fi
+
+ for _libgnurl_protocol in $_libgnurl_protocols ; do
+ AC_DEFINE_UNQUOTED(AS_TR_CPP(libgnurl_protocol_$_libgnurl_protocol),[1])
+ eval AS_TR_SH(libgnurl_protocol_$_libgnurl_protocol)=yes
+ done
+ else
+ unset LIBGNURL
+ unset LIBGNURL_CPPFLAGS
+ fi
+ fi
+
+ unset _libgnurl_try_link
+ unset _libgnurl_version_parse
+ unset _libgnurl_config
+ unset _libgnurl_feature
+ unset _libgnurl_features
+ unset _libgnurl_protocol
+ unset _libgnurl_protocols
+ unset _libgnurl_version
+ unset _libgnurl_ldflags
+ fi
+
+ if test x$_libgnurl_with = xno || test x$libgnurl_cv_lib_gnurl_usable != xyes ; then
+ # This is the IF-NO path
+ ifelse([$4],,:,[$4])
+ else
+ # This is the IF-YES path
+ ifelse([$3],,:,[$3])
+ fi
+
+ unset _libgnurl_with
+])dnl