Adding upstream version 1.21.upstream/1.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1018 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..9227f31
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,1018 @@
+dnl Template file for GNU Autoconf
+dnl Copyright (C) 1995-1997, 2001, 2007-2014, 2018-2020 Free Software
+dnl 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 Additional permission under GNU GPL version 3 section 7
+
+dnl If you modify this program, or any covered work, by linking or
+dnl combining it with the OpenSSL project's OpenSSL library (or a
+dnl modified version of that library), containing parts covered by the
+dnl terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
+dnl grants you additional permission to convey the resulting work.
+dnl Corresponding Source for a non-source form of such a combination
+dnl shall include the source code for the parts of OpenSSL used as well
+dnl as that of the covered work.
+
+dnl
+dnl Process this file with autoconf to produce a configure script.
+dnl
+
+AC_INIT([wget],[m4_esyscmd(build-aux/git-version-gen .tarball-version)],[bug-wget@gnu.org])
+AC_PREREQ([2.64])
+
+dnl
+dnl What version of Wget are we building?
+dnl
+AC_MSG_NOTICE([configuring for GNU Wget $PACKAGE_VERSION])
+
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_AUX_DIR([build-aux])
+
+AC_CONFIG_SRCDIR([src/wget.h])
+
+dnl
+dnl Automake setup
+dnl
+AM_INIT_AUTOMAKE([subdir-objects])
+
+AC_USE_SYSTEM_EXTENSIONS
+AC_PROG_CC
+AM_PROG_CC_C_O
+
+dnl
+dnl Get canonical host
+dnl
+AC_CANONICAL_HOST
+AC_DEFINE_UNQUOTED([OS_TYPE], "$host_os",
+                   [Define to be the name of the operating system.])
+
+dnl Non-verbose make
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+dnl
+dnl Process External Libraries
+dnl
+
+dnl Libpsl: Public Suffix List checking
+AC_ARG_WITH([libpsl],
+  [AS_HELP_STRING([--without-libpsl], [disable support for libpsl cookie checking.])])
+
+dnl SSL: Configure SSL backend to use
+AC_ARG_WITH([ssl],
+  [AS_HELP_STRING([--with-ssl={gnutls,openssl,no}], [specify SSL backend. GNU TLS is the default.])])
+
+dnl Zlib: Configure use of zlib for compression
+AC_ARG_WITH([zlib],
+  [AS_HELP_STRING([--without-zlib], [disable zlib.])])
+
+dnl Metalink: Configure use of the Metalink library
+AC_ARG_WITH([metalink],
+  [AS_HELP_STRING([--with-metalink], [enable support for metalinks.])])
+
+dnl C-Ares: Configure use of the c-ares library for DNS lookup
+AC_ARG_WITH(cares, AS_HELP_STRING([--with-cares], [enable support for C-Ares DNS lookup.]), with_cares=$withval, with_cares=no)
+
+dnl
+dnl Process features
+dnl
+
+AC_ARG_ENABLE([fuzzing],
+  [AS_HELP_STRING([--enable-fuzzing], [Turn on fuzzing build (for developers)])],
+  [enable_fuzzing=yes;
+   AC_SUBST([LIB_FUZZING_ENGINE])
+   AC_DEFINE([FUZZING], 1, [Define to 1 if this is a fuzzing build])
+  ], [enable_fuzzing=no; LIB_FUZZING_ENGINE=""])
+AM_CONDITIONAL([FUZZING], [test "$enable_fuzzing" = "yes"])
+
+dnl needed for some fuzzers
+OLD_LIBS="$LIBS"
+AC_SEARCH_LIBS([dlopen], [dl dld])
+if [[ "${ac_cv_search_dlopen#-l}" != "${ac_cv_search_dlopen}" ]]; then
+  FUZZ_LIBS="${ac_cv_search_dlopen}"
+  AC_SUBST([FUZZ_LIBS])
+fi
+LIBS="$OLD_LIBS"
+
+
+AC_ARG_ENABLE([fsanitize-ubsan],
+  [AS_HELP_STRING([--enable-fsanitize-ubsan], [Turn on Undefined Behavior Sanitizer (for developers)])],
+  [gl_cc_sanitize_ubsan=yes], [gl_cc_sanitize_ubsan=no])
+
+AC_ARG_ENABLE([fsanitize-asan],
+  [AS_HELP_STRING([--enable-fsanitize-asan], [Turn on Address Sanitizer (for developers) (mutually exclusive with Memory/Thread sanitizer or Valgrind tests)])],
+  [gl_cc_sanitize_asan=yes], [gl_cc_sanitize_asan=no])
+
+AC_ARG_ENABLE([fsanitize-msan],
+  [AS_HELP_STRING([--enable-fsanitize-msan], [Turn on Memory Sanitizer (for developers) (mutually exclusive with Address/Thread sanitizer or Valgrind tests)])],
+  [gl_cc_sanitize_msan=yes], [gl_cc_sanitize_msan=no])
+
+if test "$gl_cc_sanitize_asan" = yes; then
+  if test "$gl_cc_sanitize_msan" = yes; then
+    AC_MSG_ERROR([Address Sanitizer and Memory Sanitizer are mutually exclusive])
+  fi
+fi
+
+if test "$gl_cc_sanitize_ubsan" = yes; then
+  gl_WARN_ADD([-fsanitize=undefined])
+  gl_WARN_ADD([-fno-sanitize-recover=undefined])
+
+  # additional clang options
+  gl_WARN_ADD([-fsanitize=integer])
+  gl_WARN_ADD([-fsanitize=nullability])
+  gl_WARN_ADD([-fno-sanitize-recover=nullability])
+fi
+
+if test "$gl_cc_sanitize_asan" = yes; then
+  gl_WARN_ADD([-fsanitize=address])
+  gl_WARN_ADD([-fno-omit-frame-pointer])
+
+  # additional clang option
+  gl_WARN_ADD([-fsanitize-address-use-after-scope])
+fi
+
+if test "$gl_cc_sanitize_msan" = yes; then
+  # clang options
+  gl_WARN_ADD([-fsanitize=memory])
+  gl_WARN_ADD([-fsanitize-memory-track-origins])
+
+  # gcc options
+  if test "$CCNAME" = "gcc"; then
+    gl_WARN_ADD([-fsanitize=leak])
+  fi
+
+  gl_WARN_ADD([-fno-omit-frame-pointer])
+  gl_WARN_ADD([-fPIE])
+fi
+
+
+dnl Opie: Support for opie s/key FTP logins
+AC_ARG_ENABLE([opie],
+  [AS_HELP_STRING([--disable-opie], [disable support for opie or s/key FTP login])],
+  [ENABLE_OPIE=$enableval],
+  [ENABLE_OPIE=yes])
+
+AS_IF([test "x$ENABLE_OPIE" = xyes],
+  [AC_DEFINE([ENABLE_OPIE], [1], [Define if you want Opie support for FTP compiled in.])],
+  []
+)
+
+
+dnl Digest: Support for HTTP Digest Authentication
+AC_ARG_ENABLE([digest],
+  [AS_HELP_STRING([--disable-digest], [disable support for HTTP digest authorization])],
+  [ENABLE_DIGEST=$enableval],
+  [ENABLE_DIGEST=yes])
+
+AS_IF([test "x$ENABLE_DIGEST" = xyes],
+  [AC_DEFINE([ENABLE_DIGEST], [1], [Define if you want the HTTP Digest Authorization compiled in.])],
+  []
+)
+
+
+dnl NTLM: Support for HTTP NTLM Authentication
+AC_ARG_ENABLE([ntlm],
+  [AS_HELP_STRING([--disable-ntlm], [disable support for NTLM authorization])],
+  [ENABLE_NTLM=$enableval],
+  [ENABLE_NTLM=auto]
+)
+
+
+dnl Debug: Support for printing debugging output
+AC_ARG_ENABLE([debug],
+  [AS_HELP_STRING([--disable-debug], [disable support for debugging output])],
+  [ENABLE_DEBUG=$enableval],
+  [ENABLE_DEBUG=yes])
+
+AS_IF([test "x$ENABLE_DEBUG" = xyes],
+  [AC_DEFINE([ENABLE_DEBUG], [1], [Define if you want the debug output support compiled in.])],
+  []
+)
+
+dnl Valgrind-tests: Should test suite be run under valgrind?
+AC_ARG_ENABLE(valgrind-tests,
+  [AS_HELP_STRING([--enable-valgrind-tests], [enable using Valgrind for tests])],
+  [ENABLE_VALGRIND=$enableval],
+  [ENABLE_VALGRIND=no])
+
+AS_IF([test "x$ENABLE_VALGRIND" != xno], [
+  AC_CHECK_PROG(HAVE_VALGRIND, valgrind, yes, no)
+  AS_IF([test "x$HAVE_VALGRIND" = xyes], [
+    if test "$gl_cc_sanitize_asan" = yes; then
+      AC_MSG_ERROR([Valgrind and Address Sanitizer are mutually exclusive])
+    elif test "$gl_cc_sanitize_msan" = yes; then
+      AC_MSG_ERROR([Valgrind and Memory Sanitizer are mutually exclusive])
+    fi
+
+    VALGRIND_TESTS="1"
+    AC_SUBST(VALGRIND_TESTS)
+    VALGRIND_INFO="Test suite will be run under Valgrind"
+  ], [
+    VALGRIND_INFO="Valgrind not found"
+  ])
+], [
+  VALGRIND_INFO="Valgrind testing not enabled"
+])
+
+AC_ARG_ENABLE(assert,
+  [AS_HELP_STRING([--enable-assert], [enable assertions in code base])],
+  [ENABLE_ASSERTION=$enableval],
+  [ENABLE_ASSERTION=no]
+)
+
+AS_IF([test "x$ENABLE_ASSERTION" != xyes], [
+  CFLAGS="-DNDEBUG $CFLAGS"
+  ],
+  [])
+
+dnl
+dnl Find the compiler
+dnl
+
+dnl We want these before the checks, so the checks can modify their values.
+test -z "$CFLAGS"  && CFLAGS= auto_cflags=1
+test -z "$CC" && cc_specified=yes
+
+gl_EARLY
+
+dnl
+dnl Find python3
+dnl
+AM_PATH_PYTHON([3.0],,[:])
+AM_CONDITIONAL([HAVE_PYTHON3], [test "$PYTHON" != :])
+
+dnl
+dnl Gettext
+dnl
+AM_GNU_GETTEXT([external],[need-ngettext])
+AM_GNU_GETTEXT_VERSION([0.19.3])
+
+AC_PROG_RANLIB
+
+AC_PROG_LEX
+
+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
+dnl
+dnl For these tests, the system considers clang to be gcc
+if test -n "$auto_cflags"; then
+  if test -n "$GCC"; then
+    CFLAGS="$CFLAGS -O2 -Wall -Wextra"
+  else
+    case "$host_os" in
+      *hpux*)  CFLAGS="$CFLAGS +O3"                      ;;
+      *ultrix* | *osf*) CFLAGS="$CFLAGS -O -Olimit 2000" ;;
+      *)       CFLAGS="$CFLAGS -O" ;;
+    esac
+  fi
+fi
+
+dnl
+dnl Checks for basic compiler characteristics.
+dnl
+AC_C_CONST
+AC_C_INLINE
+AC_C_VOLATILE
+
+dnl Check for basic headers, even though we expect them to exist and
+dnl #include them unconditionally in the code.  Their detection is
+dnl still needed because test programs used by Autoconf macros check.
+dnl Without the checks they will fail to be included in test programs,
+dnl which will subsequently fail.
+AC_HEADER_STDC
+
+dnl Check for large file support.  This check needs to come fairly
+dnl early because it could (in principle) affect whether functions and
+dnl headers are available, whether they work, etc.
+AC_SYS_LARGEFILE
+AC_CHECK_SIZEOF(off_t)
+
+dnl
+dnl Checks for system header files that might be missing.
+dnl
+AC_HEADER_STDBOOL
+AC_CHECK_HEADERS(unistd.h sys/time.h)
+AC_CHECK_HEADERS(termios.h sys/ioctl.h sys/select.h utime.h sys/utime.h)
+AC_CHECK_HEADERS(stdint.h inttypes.h pwd.h wchar.h dlfcn.h)
+
+AC_CHECK_DECLS(h_errno,,,[#include <netdb.h>])
+
+dnl
+dnl Check sizes of integer types.  These are used to find n-bit
+dnl integral types on older systems that fail to provide intN_t and
+dnl uintN_t typedefs.
+dnl
+AC_CHECK_SIZEOF([long])
+
+dnl
+dnl Checks for non-universal or system-specific types.
+dnl
+AC_TYPE_SIZE_T
+AC_TYPE_PID_T
+AC_CHECK_TYPES([uint32_t, uintptr_t, intptr_t, int64_t])
+AC_CHECK_TYPES(sig_atomic_t, [], [], [
+#include <stdio.h>
+#include <sys/types.h>
+#include <inttypes.h>
+#include <signal.h>
+])
+
+# gnulib, AM_ICONV should be placed before gl_INIT
+AM_ICONV
+gl_INIT
+
+AX_CODE_COVERAGE
+
+dnl
+dnl Checks for library functions.
+dnl
+AC_FUNC_MMAP
+AC_FUNC_FSEEKO
+AC_CHECK_FUNCS(strptime timegm vsnprintf vasprintf drand48 pathconf)
+AC_CHECK_FUNCS(strtoll usleep ftello sigblock sigsetjmp memrchr wcwidth mbtowc)
+AC_CHECK_FUNCS(sleep symlink utime strlcpy random fmemopen)
+
+if test x"$ENABLE_OPIE" = xyes; then
+  AC_LIBOBJ([ftp-opie])
+fi
+
+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_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.])
+
+dnl Deal with specific hosts
+case $host_os in
+  *mingw32* )
+    LIBS+=' -lws2_32'
+    AC_LIBOBJ([mswindows])
+    ;;
+esac
+
+# enable all possible compiler warnings in WARN_FLAGS
+#
+# to enable by default: create a file '.manywarnings'
+# enable explicitly : ./configure --enable-manywarnings
+# disable explicitly: ./configure --disable-manywarnings
+sanitizer_flags="$WARN_CFLAGS"
+wget_MANYWARNINGS(WARN_CFLAGS, C)
+WARN_CFLAGS="$WARN_CFLAGS $sanitizer_flags"
+
+if test -n "$WARN_CFLAGS"; then
+  if test "$CCNAME" = "gcc"; then
+    # Set up list of unwanted warnings
+    nw=
+    nw="$nw -Wsystem-headers"       # System headers may trigger lot's of useless warnings
+    nw="$nw -Wvla"                  # This project is C99
+    nw="$nw -Wstack-protector"
+    nw="$nw -Wmissing-field-initializer"
+    nw="$nw -Wtraditional"
+    nw="$nw -Wtraditional-conversion"
+    nw="$nw -Wc++-compat"
+    nw="$nw -Wcast-qual"
+    nw="$nw -Wconversion"
+    nw="$nw -Wsign-conversion"
+    nw="$nw -Wunsuffixed-float-constants"
+    nw="$nw -Wdeclaration-after-statement" # C89 only, messing up gcc < 5
+    nw="$nw -Wcast-function-type" # gcc 8, very noisy
+    nw="$nw -Wabi" # gcc 8, very noisy
+    nw="$nw -Wunused-macros" # triggers in auto-generated lex css parser, #pragma doesn't work, conflicts with -Werror
+	nw="$nw -Wchkp" # Deprecated option
+    if test "$cross_compiling" = yes; then
+      nw="$nw -Wformat"
+    fi
+
+    # remove unwanted warn flags
+    wget_WORD_REMOVE([WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
+
+    WARN_CFLAGS="$WARN_CFLAGS -Wno-undef -Wno-float-equal"
+
+    # add more flags as you like
+    if test $GCC_VERSION -ge 5; then
+      WARN_CFLAGS="$WARN_CFLAGS -fdiagnostics-color=always"
+    fi
+    if test "$cross_compiling" = yes; then
+      WARN_CFLAGS="$WARN_CFLAGS -Wno-format"
+    fi
+    if test $GCC_VERSION -ge 8; then
+      WARN_CFLAGS="$WARN_CFLAGS -Wno-cast-function-type"
+    fi
+    # WARN_CFLAGS="$WARN_CFLAGS -Werror"
+
+    # We use a slightly smaller set of warning options for lib/.
+    # Remove the following and save the result in GNULIB_WARN_CFLAGS.
+    # Removing is not enough if these switches are implicitly set by other
+    #  flags like -Wall or -Wextra. We have to explicitly unset them
+    #  with -Wno-....
+    nw=
+    nw="$nw -Wpedantic"
+    nw="$nw -Wsign-compare"
+    nw="$nw -Wunused-parameter"
+    nw="$nw -Wswitch-default"
+    nw="$nw -Wformat-nonliteral"
+    nw="$nw -Wsuggest-attribute=pure"
+    nw="$nw -Wunsafe-loop-optimizations"
+    nw="$nw -Wundef"
+    nw="$nw -Wswitch-enum"
+    nw="$nw -Wbad-function-cast"
+    nw="$nw -Wredundant-decls"
+    nw="$nw -Werror"
+    wget_WORD_REMOVE([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
+    wget_WORD_REMOVE([CFLAGS], [$CFLAGS], [-Werror])
+
+    # disable options implicitly set by other options
+    GNULIB_WARN_CFLAGS="-Wno-error $GNULIB_WARN_CFLAGS"
+    GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-sign-compare -Wno-unused-parameter -Wno-alloca"
+    GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-float-conversion -Wno-cast-function-type"
+    if test "$cross_compiling" = yes; then
+      GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-incompatible-pointer-types"
+    fi
+
+  elif test "$CCNAME" = "clang"; then
+    # setup flags for this project
+    WARN_CFLAGS="$WARN_CFLAGS -Wno-system-headers -Wno-vla -Wno-cast-qual -Wno-padded"
+    WARN_CFLAGS="$WARN_CFLAGS -Wno-reserved-id-macro -Wno-sign-conversion  -Wno-disabled-macro-expansion"
+    WARN_CFLAGS="$WARN_CFLAGS -Wno-documentation -Wno-documentation-unknown-command"
+    WARN_CFLAGS="$WARN_CFLAGS -Wno-covered-switch-default -Wno-unused-macros"
+    WARN_CFLAGS="$WARN_CFLAGS -Wno-missing-field-initializers"
+
+    # remove all flags from WARN_FLAGS that are already in CFLAGS
+    # wget_WORD_REMOVE([WARN_CFLAGS], [$WARN_CFLAGS], [$CFLAGS])
+
+    wget_WORD_REMOVE([CFLAGS], [$CFLAGS], [-Werror])
+
+    # disable verbose options
+    GNULIB_WARN_CFLAGS="-Wno-error $GNULIB_WARN_CFLAGS"
+    GNULIB_WARN_CFLAGS="$WARN_CFLAGS -Wno-sign-compare -Wno-unused-parameter -Wno-undef -Wno-format-nonliteral"
+    GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-conversion -Wno-disabled-macro-expansion -Wno-c++98-compat"
+    GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-gnu-statement-expression -Wno-shorten-64-to-32 -Wno-switch-enum"
+    GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-unused-macros -Wno-missing-field-initializers"
+    GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-gnu-zero-variadic-macro-arguments -Wno-conditional-uninitialized"
+    GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-comma -Wno-assign-enum -Wno-unreachable-code -Wno-error"
+    GNULIB_WARN_CFLAGS="$GNULIB_WARN_CFLAGS -Wno-missing-field-initializers"
+
+    # remove all flags from GNULIB_WARN_FLAGS that are already in CFLAGS
+    # wget_WORD_REMOVE([GNULIB_WARN_CFLAGS], [$GNULIB_WARN_CFLAGS], [$CFLAGS])
+  fi
+
+  AC_SUBST([WARN_CFLAGS])
+  AC_SUBST([GNULIB_WARN_CFLAGS])
+fi
+
+
+dnl
+dnl Checks for libraries.
+dnl
+
+PKG_PROG_PKG_CONFIG
+
+AS_IF([test "x$with_libpsl" != xno], [
+  PKG_CHECK_MODULES([LIBPSL], libpsl, [
+    with_libpsl=yes
+    # correct $LIBPSL_LIBS (in libpsl <= 0.6.0)
+    AS_IF([test "x$LIBPSL_LIBS" = "x-llibpsl "], [LIBPSL_LIBS="-lpsl"])
+    LIBS="$LIBPSL_LIBS $LIBS"
+    CFLAGS="$LIBPSL_CFLAGS $CFLAGS"
+    AC_DEFINE([HAVE_LIBPSL], [1], [PSL support enabled])
+  ], [
+    AC_SEARCH_LIBS(psl_builtin, psl,
+      [with_libpsl=yes; AC_DEFINE([HAVE_LIBPSL], [1], [PSL support enabled])],
+      [with_libpsl=no;  AC_MSG_WARN(*** libpsl was not found. Fallback to builtin cookie checking.)])
+  ])
+])
+
+AS_IF([test x"$with_libpsl" = xyes], [
+  AC_CHECK_FUNCS(psl_latest)
+])
+
+AS_IF([test x"$with_zlib" != xno], [
+  with_zlib=yes
+  PKG_CHECK_MODULES([ZLIB], zlib, [
+    LIBS="$ZLIB_LIBS $LIBS"
+    CFLAGS="$ZLIB_CFLAGS $CFLAGS"
+    AC_DEFINE([HAVE_LIBZ], [1], [Define if using zlib.])
+  ], [
+    AC_CHECK_LIB(z, compress)
+  ])
+])
+
+AS_IF([test x"$with_ssl" = xopenssl], [
+  if [test x"$with_libssl_prefix" = x]; then
+    PKG_CHECK_MODULES([OPENSSL], [openssl], [
+      AC_MSG_NOTICE([compiling in support for SSL via OpenSSL])
+      AC_LIBOBJ([openssl])
+      LIBS="$OPENSSL_LIBS $LIBS"
+      CFLAGS="$OPENSSL_CFLAGS -DHAVE_LIBSSL $CFLAGS"
+      LIBSSL=" " # ntlm check below wants this
+      AC_CHECK_FUNCS([RAND_egd])
+      AC_DEFINE([HAVE_LIBSSL], [1], [Define if using openssl.])
+      ssl_found=yes
+    ])
+  fi
+  if [test x"$ssl_found" != xyes]; then
+    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 shl_load().
+    AC_CHECK_LIB(dl, dlopen, [], [
+      AC_CHECK_LIB(dl, shl_load)
+    ])
+
+    ssl_found=no
+    case $host_os in
+      *mingw32* )
+        dnl prefer link to openssl dlls if possible. if not then fallback on static libs. if not then error
+
+        AC_CHECK_LIB(eay32, EVP_MD_CTX_init)
+        if test x"$ac_cv_lib_eay32_EVP_MD_CTX_init" != xno
+        then
+          AC_CHECK_LIB(ssl32, SSL_connect, [
+            ssl_found=yes
+            AC_MSG_NOTICE([Enabling support for SSL via OpenSSL (shared)])
+            AC_LIBOBJ([openssl])
+            LIBS="${LIBS} -lssl32"
+            AC_DEFINE([HAVE_LIBSSL32], [1], [Define to 1 if you have the `ssl32' library (-lssl32).])
+          ],
+          AC_MSG_ERROR([openssl not found: shared lib eay32 found but ssl32 not found]))
+
+        else
+          LIBS+=' -lgdi32'
+          dnl fallback and test static libs
+        fi
+        dnl add zdll lib as dep for above tests?
+      ;;
+    esac
+
+    AS_IF([test x$ssl_found != xyes], [
+      dnl Now actually check for -lssl if it wasn't already found
+      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"$LIBSSL" != x
+      then
+        ssl_found=yes
+        AC_MSG_NOTICE([compiling in support for SSL via OpenSSL])
+        AC_LIBOBJ([openssl])
+        LIBS="$LIBSSL $LIBS"
+        AC_CHECK_FUNCS([RAND_egd])
+      elif test x"$with_ssl" != x
+      then
+        AC_MSG_ERROR([--with-ssl=openssl was given, but SSL is not available.])
+      fi
+    ])
+  fi
+], [
+  # --with-ssl is not openssl: check if it's no
+  AS_IF([test x"$with_ssl" != xno], [
+    dnl default is -lgnutls
+    with_ssl=gnutls
+
+    dnl Now actually check for -lgnutls
+    if [test x"$with_libgnutls_prefix" = x]; then
+      PKG_CHECK_MODULES([GNUTLS], [gnutls], [
+        AC_MSG_NOTICE([compiling in support for SSL via GnuTLS])
+        AC_LIBOBJ([gnutls])
+        LIBS="$GNUTLS_LIBS $LIBS"
+        CFLAGS="$GNUTLS_CFLAGS -DHAVE_LIBGNUTLS $CFLAGS"
+        AC_DEFINE([HAVE_LIBGNUTLS], [1], [Define if using gnutls.])
+        ssl_found=yes
+      ])
+    fi
+    if [test x"$ssl_found" != xyes]; then
+      AC_LIB_HAVE_LINKFLAGS([gnutls], [], [
+#include <gnutls/gnutls.h>
+      ], [gnutls_global_init()])
+      if test x"$LIBGNUTLS" != x
+      then
+        ssl_found=yes
+        AC_MSG_NOTICE([compiling in support for SSL via GnuTLS])
+        AC_LIBOBJ([gnutls])
+        LIBS="$LIBGNUTLS $LIBS"
+      else
+        AC_MSG_ERROR([GnuTLS has not been found. Use --with-ssl=openssl if you explicitly want OpenSSL.])
+      fi
+    fi
+
+    AC_CHECK_FUNCS(gnutls_priority_set_direct)
+  ]) # endif: --with-ssl != no?
+]) # endif: --with-ssl == openssl?
+
+dnl Enable NTLM if requested and if SSL is available.
+if test x"$LIBSSL" != x || test "$ac_cv_lib_ssl32_SSL_connect" = yes
+then
+  if test x"$ENABLE_NTLM" != xno
+  then
+    ENABLE_NTLM=yes
+    AC_DEFINE([ENABLE_NTLM], 1,
+     [Define if you want the NTLM authorization support compiled in.])
+    AC_LIBOBJ([http-ntlm])
+  fi
+else
+  AC_CHECK_LIB(nettle, nettle_md4_init, [HAVE_NETTLE=yes], [HAVE_NETTLE=no; AC_MSG_WARN(*** libnettle was not found. You will not be able to use NTLM)])
+
+  if test x"$HAVE_NETTLE" = xyes
+  then
+    AC_SUBST(NETTLE_LIBS, "-lnettle")
+    AC_DEFINE([HAVE_NETTLE], [1], [Use libnettle])
+    if test x"$ENABLE_NTLM" != xno
+    then
+      ENABLE_NTLM=yes
+      AC_DEFINE([ENABLE_NTLM], 1,
+       [Define if you want the NTLM authorization support compiled in.])
+      AC_LIBOBJ([http-ntlm])
+      LIBS="$NETTLE_LIBS $LIBS"
+    fi
+  else
+    dnl If SSL is unavailable and the user explicitly requested NTLM,
+    dnl abort.
+    if test x"$ENABLE_NTLM" = xyes
+    then
+      AC_MSG_ERROR([NTLM authorization requested and SSL not enabled; aborting])
+    fi
+  fi
+fi
+
+dnl **********************************************************************
+dnl Checks for IPv6
+dnl **********************************************************************
+
+dnl
+dnl We test for IPv6 by checking, in turn, for availability of
+dnl presence of the INET6 address/protocol family and the existence of
+dnl struct sockaddr_in6.  If any of them is missing, IPv6 is disabled,
+dnl 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,
+  AS_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$ipv6" = "Xyes"; then
+  PROTO_INET6([], [
+    AC_MSG_NOTICE([Disabling IPv6 support: your system does not support the PF_INET6 protocol family])
+    ipv6=no
+  ])
+fi
+
+if test "X$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$force_ipv6" = "xyes"; then
+  AC_MSG_ERROR([IPv6 support requested but not found; aborting])
+fi
+
+dnl
+dnl Find makeinfo.  We used to provide support for Emacs processing
+dnl Texinfo using `emacs -batch -eval ...' where makeinfo is
+dnl unavailable, but that broke with the addition of makeinfo-specific
+dnl command-line options, such as `-I'.  Now we depend on makeinfo to
+dnl build the Info documentation.
+dnl
+
+AC_CHECK_PROGS(MAKEINFO, [makeinfo], [true])
+
+dnl
+dnl Find perl and pod2man
+dnl
+
+AC_PATH_PROGS(PERL, [perl5 perl], no)
+AC_PATH_PROG(POD2MAN, pod2man, no)
+
+if test "x${POD2MAN}" = xno; then
+  COMMENT_IF_NO_POD2MAN="# "
+else
+  COMMENT_IF_NO_POD2MAN=
+fi
+AC_SUBST(COMMENT_IF_NO_POD2MAN)
+
+
+dnl
+dnl Check for IDN/IRIs
+dnl
+
+AC_ARG_ENABLE(iri,
+  AS_HELP_STRING([--disable-iri],[disable IDN/IRIs support]),
+  [case "${enable_iri}" in
+    no)
+      dnl Disable IRIs checking
+      AC_MSG_NOTICE([disabling IRIs at user request])
+      iri=no
+      ;;
+    yes)
+      dnl IRIs explicitly enabled
+      iri=yes
+      force_iri=yes
+      ;;
+    auto)
+      dnl Auto-detect IRI
+      iri=yes
+      ;;
+    *)
+      AC_MSG_ERROR([Invalid --enable-iri argument \`$enable_iri'])
+      ;;
+    esac
+  ], [
+    dnl If nothing is specified, assume auto-detection
+    iri=yes
+  ]
+)
+
+AS_IF([test "X$iri" != "Xno"],[
+  if test "X$am_cv_func_iconv" != "Xyes"; then
+    iri=no
+    if test "X$force_iri" = "Xyes"; then
+      AC_MSG_ERROR([Libiconv is required for IRIs support])
+    else
+      AC_MSG_NOTICE([disabling IRIs because libiconv wasn't found])
+    fi
+  fi
+])
+
+AC_ARG_WITH(libidn, AS_HELP_STRING([--with-libidn=[DIR]],[Support IDN2008/IRIs (needs GNU libidn2 + libunicode)]),
+                                   libidn=$withval, libidn="")
+if test "X$iri" != "Xno"; then
+  AS_IF([test "x$with_libidn2" != xno], [
+    AC_SEARCH_LIBS(idn2_lookup_u8, idn2,
+      [with_libidn2=yes; AC_DEFINE([ENABLE_IRI], 1, [Define if IRI support is enabled.])],
+      [with_libidn2=no; iri=no; AC_MSG_WARN(*** LIBIDN2 was not found. You will not be able to use IDN2008 support)])
+
+#    AS_IF([test "x$with_libidn2" = xyes], [
+#      AC_SEARCH_LIBS(u8_tolower, unistring,
+#        [AC_DEFINE([ENABLE_IRI], 1, [Define if IRI support is enabled.])],
+#        [iri=no; AC_MSG_WARN(*** LIBUNISTRING was not found. You will not be able to use IDN2008 support)])
+#    ])
+  ])
+fi
+
+dnl
+dnl Check for UUID
+dnl
+
+AC_ARG_WITH(libuuid, AS_HELP_STRING([--without-libuuid],[Generate UUIDs for WARC files via libuuid]))
+
+AS_IF([test "x$with_libuuid" = xyes], [
+  # libuuid was explicitly requested
+  PKG_CHECK_MODULES([UUID], uuid, [
+    LIBS="$UUID_LIBS $LIBS"
+    CFLAGS="$UUID_CFLAGS $CFLAGS"
+    uuid_mode=1
+  ], [
+    AC_SEARCH_LIBS(uuid_generate, uuid,
+      [uuid_mode=1],
+      [AC_MSG_ERROR(*** libuuid was explicitly requested but wasn't found.)])
+  ])
+], [test "x$with_libuuid" = xno], [
+  # libuuid was explicitly *not* requested
+  AC_CHECK_HEADER(uuid.h,
+    AC_CHECK_FUNC(uuid_create, [uuid_mode=2]))
+], [
+  # default:
+  AC_CHECK_HEADER(uuid.h, [
+    AC_CHECK_FUNC(uuid_create, [uuid_mode=2])
+  ], [
+    AC_CHECK_HEADER(uuid/uuid.h,
+      AC_SEARCH_LIBS(uuid_generate, uuid, [uuid_mode=1]))
+  ])
+])
+
+AS_IF([test "x$uuid_mode" = x1], [
+  AC_DEFINE([HAVE_LIBUUID], [1], [Define if using libuuid.])
+], [test "x$uuid_mode" = x2], [
+  AC_DEFINE([HAVE_UUID_CREATE], 1, [Define if uuid_create is available.])
+])
+
+dnl
+dnl Check for PCRE2 / PCRE
+dnl
+
+AC_ARG_ENABLE(pcre2, AS_HELP_STRING([--disable-pcre2],[Disable PCRE2 style regular expressions]))
+AC_ARG_ENABLE(pcre, AS_HELP_STRING([--disable-pcre],[Disable PCRE style regular expressions]))
+
+AS_IF([test "X$enable_pcre2" != "Xno"],[
+  enable_pcre2=no
+  PKG_CHECK_MODULES([PCRE2], libpcre2-8, [
+    CFLAGS="$PCRE2_CFLAGS $CFLAGS"
+    LIBS="$PCRE2_LIBS $LIBS"
+    AC_DEFINE([HAVE_LIBPCRE2], [1], [Define if libpcre2 is available.])
+    enable_pcre2=yes
+  ], [
+    AC_CHECK_HEADER(pcre2.h, [
+      AC_CHECK_LIB(pcre2-8, pcre2_compile_8, [
+        LIBS="${LIBS} -lpcre2-8"
+        AC_DEFINE([HAVE_LIBPCRE2], 1, [Define if libpcre2 is available.])
+        enable_pcre2=yes
+      ])
+    ])
+  ])
+])
+
+AS_IF([test "X$enable_pcre" != "Xno" && test "X$enable_pcre2" != "Xyes"],[
+  PKG_CHECK_MODULES([PCRE], libpcre, [
+    CFLAGS="$PCRE_CFLAGS $CFLAGS"
+    AC_CHECK_HEADER(pcre.h, [
+      LIBS="$PCRE_LIBS $LIBS"
+      AC_DEFINE([HAVE_LIBPCRE], [1], [Define if libpcre is available.])
+      enable_pcre=yes
+    ])
+  ], [
+    AC_CHECK_HEADER(pcre.h, [
+      AC_CHECK_LIB(pcre, pcre_compile, [
+        LIBS="${LIBS} -lpcre"
+        AC_DEFINE([HAVE_LIBPCRE], 1, [Define if libpcre is available.])
+      ])
+    ])
+  ])
+])
+
+AS_IF([test "X$enable_pcre2" = Xyes], [PCRE_INFO="yes, via libpcre2"], [test "X$enable_pcre" = Xyes], [PCRE_INFO="yes, via libpcre"], [PCRE_INFO=no])
+
+dnl
+dnl Check for libcares (resolver library)
+dnl
+
+AS_IF([test "X$with_cares" = "Xyes"],[
+  PKG_CHECK_MODULES([CARES], libcares, [
+    CFLAGS="$CARES_CFLAGS $CFLAGS"
+    AC_CHECK_HEADER(ares.h, [
+      LIBS="$CARES_LIBS $LIBS"
+      AC_DEFINE([HAVE_LIBCARES], [1], [Define if libcares is available.])
+      RESOLVER_INFO="libcares, --bind-dns-address and --dns-servers available"
+    ])
+  ], [
+    AC_CHECK_HEADER(ares.h, [
+      AC_CHECK_LIB(cares, ares_set_local_ip4, [
+        LIBS="-lcares ${LIBS}"
+        AC_DEFINE([HAVE_LIBCARES], 1, [Define if libcares is available.])
+        RESOLVER_INFO="libcares, --bind-dns-address and --dns-servers available"
+      ])
+    ])
+  ])
+], [
+  RESOLVER_INFO="libc, --bind-dns-address and --dns-servers not available"
+])
+
+dnl
+dnl Check for libmetalink
+dnl
+AS_IF([test x"$with_metalink" != xno], [
+  PKG_CHECK_MODULES([METALINK], libmetalink, [
+      LIBS="$METALINK_LIBS $LIBS"
+      CFLAGS="$METALINK_CFLAGS $CFLAGS"
+      AC_DEFINE([HAVE_METALINK], [1], [Define if using metalink.])
+      with_metalink=yes
+    ], [
+      with_metalink=no
+    ])
+
+  have_gpg=no
+  AS_IF([test x"$with_metalink" = xyes], [
+    dnl
+    dnl Check for GPGME
+    dnl
+    m4_ifdef([AM_PATH_GPGME], [
+      AM_PATH_GPGME([], [
+        # Put libgpgme to the end of the library list since it introduces a -L linker flags.
+        # That -L might break the build if there are two different version of
+        # a library (e.g. GnuTLS) in /usr/local and in the system directory.
+        LIBS="$LIBS $GPGME_LIBS"
+        CFLAGS="$GPGME_CFLAGS $CFLAGS"
+        AC_DEFINE([HAVE_GPGME], [1], [Define if GPGME is available.])
+        have_gpg=yes
+      ])
+    ])
+  ])
+])
+
+dnl
+dnl Extended Attribute support
+dnl
+
+AC_ARG_ENABLE([xattr],
+  [AS_HELP_STRING([--disable-xattr], [disable support for POSIX Extended Attributes])],
+  [ENABLE_XATTR=$enableval],
+  [ENABLE_XATTR=yes])
+
+case "$host_os" in
+  *linux* | *darwin*) xattr_syscalls="fsetxattr" ;;
+  freebsd*)           xattr_syscalls="extattr_set_fd" ;;
+  *)  AC_MSG_NOTICE([Disabling Extended Attribute support: your system is not known to support extended attributes.])
+      ENABLE_XATTR=no
+esac
+
+if test "X${ENABLE_XATTR}" = "Xyes"; then
+  AC_CHECK_FUNCS([$xattr_syscalls], [], [
+    AC_MSG_NOTICE([Disabling Extended Attribute support: your system does not support $xattr_syscalls])
+    ENABLE_XATTR=no
+  ])
+fi
+
+test "X${ENABLE_XATTR}" = "Xyes" && AC_DEFINE([ENABLE_XATTR], 1,
+    [Define if you want file meta-data storing into POSIX Extended Attributes compiled in.])
+
+dnl Needed by src/Makefile.am
+AM_CONDITIONAL([IRI_IS_ENABLED], [test "X$iri" != "Xno"])
+AM_CONDITIONAL([WITH_SSL], [test "X$with_ssl" != "Xno"])
+AM_CONDITIONAL([METALINK_IS_ENABLED], [test "X$with_metalink" != "Xno"])
+AM_CONDITIONAL([WITH_XATTR], [test "X$ENABLE_XATTR" != "Xno"])
+AM_CONDITIONAL([WITH_NTLM], [test "X$ENABLE_NTLM" == "Xyes"])
+
+dnl
+dnl Create output
+dnl
+AC_CONFIG_FILES([Makefile src/Makefile doc/Makefile util/Makefile
+                 po/Makefile.in gnulib_po/Makefile.in tests/Makefile
+                 fuzz/Makefile lib/Makefile testenv/Makefile
+                 tests/certs/interca.conf tests/certs/rootca.conf])
+AC_CONFIG_HEADERS([src/config.h])
+AC_OUTPUT
+
+AC_MSG_NOTICE([Summary of build options:
+
+  Version:           $PACKAGE_VERSION
+  Host OS:           $host_os
+  Install prefix:    $prefix
+  Compiler:          $CC
+  CFlags:            $CFLAGS $CPPFLAGS $WARN_CFLAGS
+  LDFlags:           $LDFLAGS
+  Libs:              $LIBS
+  SSL:               $with_ssl
+  Zlib:              $with_zlib
+  PSL:               $with_libpsl
+  PCRE:              $PCRE_INFO
+  Digest:            $ENABLE_DIGEST
+  NTLM:              $ENABLE_NTLM
+  OPIE:              $ENABLE_OPIE
+  POSIX xattr:       $ENABLE_XATTR
+  Debugging:         $ENABLE_DEBUG
+  Assertions:        $ENABLE_ASSERTION
+  Valgrind:          $VALGRIND_INFO
+  Metalink:          $with_metalink
+  Resolver:          $RESOLVER_INFO
+  GPGME:             $have_gpg
+  IRI:               $iri
+  Fuzzing build:     $enable_fuzzing, $LIB_FUZZING_ENGINE
+])