resolved: default to OpenSSL

If both gnutls and openssl are available, prefer openssl.
We are gradually moving toward supporting openssl only as the
crypto library, and the resolved gnutls backend will be dropped
at some point, so start nudging users toward the openssl one.

diff --git a/meson.build b/meson.build
index acd938d2d6c74d266aac2894bf344db8bfbe8ffa..69724a1cdd3767eb7629271e8321f2e5615febbc 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -1595,20 +1595,20 @@ if dns_over_tls != 'false'
                 error('Sorry, -Ddns-over-tls=gnutls is not supported when openssl is used as the cryptolib')
         endif
 
-        if dns_over_tls == 'openssl' or conf.get('PREFER_OPENSSL') == 1
-                have_gnutls = false
+        if dns_over_tls == 'gnutls'
+                have_openssl = false
         else
-                have_gnutls = (conf.get('HAVE_GNUTLS') == 1 and libgnutls.version().version_compare('>= 3.6.0'))
-                if dns_over_tls == 'gnutls' and not have_gnutls
-                        error('DNS-over-TLS support was requested with gnutls, but dependencies are not available')
+                have_openssl = conf.get('HAVE_OPENSSL') == 1
+                if dns_over_tls == 'openssl' and not have_openssl
+                        error('DNS-over-TLS support was requested with openssl, but dependencies are not available')
                 endif
         endif
-        if dns_over_tls == 'gnutls' or have_gnutls
-                have_openssl = false
+        if dns_over_tls == 'openssl' or have_openssl
+                have_gnutls = false
         else
-                have_openssl = conf.get('HAVE_OPENSSL') == 1
-                if dns_over_tls != 'auto' and not have_openssl
-                        str = dns_over_tls == 'openssl' ? ' with openssl' : ''
+                have_gnutls = conf.get('HAVE_GNUTLS') == 1 and libgnutls.version().version_compare('>= 3.6.0')
+                if dns_over_tls != 'auto' and not have_gnutls
+                        str = dns_over_tls == 'gnutls' ? ' with gnutls' : ''
                         error('DNS-over-TLS support was requested@0@, but dependencies are not available'.format(str))
                 endif
         endif