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=$wget_save_CPPFLAGSfidnldnl Find an md5 implementation.dnlif test x"$wget_need_md5" = xyesthen  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="$MD5_OBJ gnu-md5\$o"    found_md5=yes    AC_MSG_NOTICE([using the GNU MD5 implementation])  fifiAC_DEFINE(HAVE_MD5)AC_SUBST(MD5_OBJ)dnl **********************************************************************dnl Checks for IPv6dnl **********************************************************************ipv6=check_for_ipv6=noAC_ARG_ENABLE(ipv6,  AC_HELP_STRING([--disable-ipv6],[disable IPv6 support]),  [case "${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  ])fiif 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$ipv6" = "Xyes"; then    MEMBER_SIN6_SCOPE_ID  fifiif test "X$ipv6" = "Xyes"; then  AC_DEFINE([ENABLE_IPV6], 1, [Define if IPv6 support is enabled.])fidnldnl Set of available languages.dnlALL_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 adnl new language was added.dnl internationalization macrosWGET_WITH_NLSdnldnl Find makeinfo.  If makeinfo is not found, look for Emacs.  Ifdnl Emacs cannot be found, look for XEmacs.dnlAC_CHECK_PROGS(MAKEINFO, makeinfo emacs xemacs)case "${MAKEINFO}" in   *makeinfo) MAKEINFO="${MAKEINFO} \$(srcdir)/wget.texi"  ;;   *emacs | *xemacs) MAKEINFO="${MAKEINFO} -batch -q -no-site-file -eval '(find-file \"\$(srcdir)/wget.texi\")' -l texinfmt -f texinfo-format-buffer -f save-buffer"  ;;   *) MAKEINFO="makeinfo \$(srcdir)/wget.texi"            ;;esacdnldnl Find perl and pod2mandnlAC_PATH_PROGS(PERL, perl5 perl, no)AC_PATH_PROG(POD2MAN, pod2man, no)if test "x${POD2MAN}" = xno; then  COMMENT_IF_NO_POD2MAN="# "else  COMMENT_IF_NO_POD2MAN=fiAC_SUBST(COMMENT_IF_NO_POD2MAN)dnldnl Create outputdnlAC_OUTPUT([Makefile src/Makefile doc/Makefile util/Makefile po/Makefile.in           windows/Makefile],[WGET_PROCESS_POtest -z "$CONFIG_HEADERS" || echo timestamp > stamp-h])