From a8f46f9196f94348378e39a6a24e05f83922d063 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Apr 07 2021 22:35:28 +0000
Subject: meson: check whether gnutls supports TCP fast open


Fixes #9403

Cherry-picked from: f02582f69fe1e7663a87ba80bd4f90d5d23ee75f

patch_name: 0058-meson-check-whether-gnutls-supports-TCP-fast-open.patch
present_in_specfile: true
location_in_specfile: 58
squash_commits: true

---

diff --git a/README b/README
index 2cde08c..7d06e04 100644
--- a/README
+++ b/README
@@ -154,6 +154,7 @@ REQUIREMENTS:
         libmicrohttpd (optional)
         libpython (optional)
         libidn2 or libidn (optional)
+        gnutls >= 3.1.4 (optional, >= 3.5.3 is necessary to support DNS-over-TLS)
         elfutils >= 158 (optional)
         polkit (optional)
         pkg-config
diff --git a/meson.build b/meson.build
index ebc5587..d58926c 100644
--- a/meson.build
+++ b/meson.build
@@ -1148,7 +1148,7 @@ substs.set('DEFAULT_DNSSEC_MODE', default_dnssec)
 
 dns_over_tls = get_option('dns-over-tls')
 if dns_over_tls != 'false'
-        have = conf.get('HAVE_GNUTLS') == 1
+        have = libgnutls != [] and libgnutls.version().version_compare('>=3.5.3')
         if dns_over_tls == 'true' and not have
                 error('DNS-over-TLS support was requested, but dependencies are not available')
         endif