sniproxy: pull upstream fix for -fno-common toolchain support

Without the change build fails against upstream gcc-10 as:

   ld: tls.o:/build/source/src/tls.h:31: multiple definition of
     `tls_protocol'; listener.o:/build/source/src/tls.h:31: first defined here

1 files changed, 11 insertions, 1 deletions

diff --git a/pkgs/applications/networking/sniproxy/default.nix b/pkgs/applications/networking/sniproxy/default.nix
index 6652e7c986c38..7c8e3dfd93dc4 100644
--- a/pkgs/applications/networking/sniproxy/default.nix
+++ b/pkgs/applications/networking/sniproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, autoreconfHook, gettext, libev, pcre, pkg-config, udns }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, autoreconfHook, gettext, libev, pcre, pkg-config, udns }:
 
 stdenv.mkDerivation rec {
   pname = "sniproxy";
@@ -11,6 +11,16 @@ stdenv.mkDerivation rec {
     sha256 = "0isgl2lyq8vz5kkxpgyh1sgjlb6sqqybakr64w2mfh29k5ls8xzm";
   };
 
+  patches = [
+    # Pull upstream fix for -fno-common toolchain support:
+    #   https://github.com/dlundquist/sniproxy/pull/349
+    (fetchpatch {
+      name = "fno-common.patch";
+      url = "https://github.com/dlundquist/sniproxy/commit/711dd14affd5d0d918cd5fd245328450e60c7111.patch";
+      sha256 = "1vlszib2gzxnkl9zbbrf2jz632j1nhs4aanpw7qqnx826zmli0a6";
+    })
+  ];
+
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ gettext libev pcre udns ];