dirmngr: New configure option --disable-libdns.

* configure.ac: Add option --disable-libdns
(USE_LIBDNS): New ac_subst and am_conditional.
(USE_C99_CFLAGS): Set only if libdns is used.
* dirmngr/Makefile.am (dirmngr_SOURCES): Move dns.c and dns.h to ...
(dirmngr_SOURCES) [USE_LIBDNS0: here.
(t_common_src): Ditto.
* dirmngr/dirmngr.c (oRecursiveResolver): New constant.
(opts): New option "--recursive-resolver".
(parse_rereadable_options): Set option.
* dirmngr/t-dns-stuff.c (main): Add option --recursive-resolver.
* dirmngr/server.c (cmd_getinfo): Depend output of "dnsinfo" on the
new variables.
* dirmngr/dns-stuff.c: Include dns.h only if USE_DNSLIB is defined.
Also build and call dnslib functions only if USE_DNSLIB is defined.
(recursive_resolver): New var.
(enable_recursive_resolver): New func.
(recursive_resolver_p): New func.
--

In case users run into problems building GnuPG, the configure option
allows to disable that support and continue w/o Tor support using the
system resolver.

--recursive-resolver was easy enough to implement and may be useful in
some situation.  It does not fully work, though.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 10 insertions, 0 deletions

diff --git a/README b/README
index c8b166b27..322d36659 100644
--- a/README
+++ b/README
@@ -117,6 +117,16 @@
   Add other options as needed.
 
 
+*** Systems without a full C99 compiler
+
+  If you run into problems with our compiler complaining about dns.c
+  you may use
+
+    ./configure --disable-libdns
+
+  Add other options as needed.
+
+
 * MIGRATION from 1.4 or 2.0 to 2.1
 
   The major change in 2.1 is gpg-agent taking care of the OpenPGP