Bug#588234: GNUTLS and threads are considered incompatible

[Arne Nordmark <nordmark@mech.kth.se>]

Consider the check in config-scripts/cups-ssl.m4:

            if test "x$have_pthread" = xyes; then
                AC_MSG_WARN([The current version of GNU TLS cannot be 
made thread-safe.])
            else
                have_ssl=1


From the build log:

checking for libgnutls-config... no
checking for libgcrypt-config... /usr/bin/libgcrypt-config
configure: WARNING: The current version of GNU TLS cannot be made 
thread-safe.

Changing the configure options to --disable-threads gives instead:

checking for libgnutls-config... no
checking for libgcrypt-config... /usr/bin/libgcrypt-config
    Using SSLLIBS="-lgnutls   -lgcrypt"
    Using SSLFLAGS="  "

and the resulting binaries indeed support TLS again.

This seems to be the same issue as 590610.

Thanks
Arne