+if test "$x_io_epoll" = "yes" -a "$x_io_select" = "yes"; then
+ # when epoll() and select() are available, we'll use both!
+ x_io_backend="epoll(), select()"
+else
+ if test "$x_io_epoll" = "yes"; then
+ # we prefere epoll() if it is available
+ x_io_backend="epoll()"
+ else
+ if test "$x_io_select" = "yes" -a "$x_io_backend" = "none"; then
+ # we'll use select, when available and no "better"
+ # interface has been detected ...
+ x_io_backend="select()"
+ fi
+ fi
+fi
+
+if test "$x_io_backend" = "none"; then
+ AC_MSG_ERROR([No useable IO API activated/found!?])
+fi
+
+# use SSL?
+
+AC_ARG_WITH(openssl,
+ AS_HELP_STRING([--with-openssl],
+ [enable SSL support using OpenSSL]),
+ [ if test "$withval" != "no"; then
+ if test "$withval" != "yes"; then
+ CFLAGS="-I$withval/include $CFLAGS"
+ CPPFLAGS="-I$withval/include $CPPFLAGS"
+ LDFLAGS="-L$withval/lib $LDFLAGS"
+ fi
+ AC_CHECK_LIB(crypto, BIO_s_mem)
+ AC_CHECK_LIB(ssl, SSL_library_init)
+ AC_CHECK_FUNCS(SSL_library_init, x_ssl_openssl=yes,
+ AC_MSG_ERROR([Can't enable openssl])
+ )
+ fi
+ ]
+)
+
+AC_ARG_WITH(gnutls,
+ AS_HELP_STRING([--with-gnutls],
+ [enable SSL support using gnutls]),
+ [ if test "$withval" != "no"; then
+ if test "$withval" != "yes"; then
+ CFLAGS="-I$withval/include $CFLAGS"
+ CPPFLAGS="-I$withval/include $CPPFLAGS"
+ LDFLAGS="-L$withval/lib $LDFLAGS"
+ fi
+ AC_CHECK_LIB(gnutls, gnutls_global_init)
+ AC_CHECK_FUNCS(gnutls_global_init, x_ssl_gnutls=yes,
+ AC_MSG_ERROR([Can't enable gnutls])
+ )
+ fi
+ ]
+)
+
+x_ssl_lib="no"
+if test "$x_ssl_gnutls" = "yes"; then
+ if test "$x_ssl_openssl" = "yes";then
+ AC_MSG_ERROR([Cannot enable both gnutls and openssl])
+ fi
+ x_ssl_lib=gnutls
+fi
+if test "$x_ssl_openssl" = "yes"; then
+ x_ssl_lib=openssl
+fi
+
+# use TCP wrappers?