libsodium: Don't fortify on mingw

pkgs/development/libraries/libsodium/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl }:
+{ lib, stdenv, fetchurl, autoreconfHook }:
 
 stdenv.mkDerivation rec {
   pname = "libsodium";
@@ -10,6 +10,11 @@ stdenv.mkDerivation rec {
   };
 
   outputs = [ "out" "dev" ];
+
+  patches = lib.optional stdenv.targetPlatform.isMinGW ./mingw-no-fortify.patch;
+
+  nativeBuildInputs = lib.optional stdenv.targetPlatform.isMinGW autoreconfHook;
+
   separateDebugInfo = stdenv.isLinux && stdenv.hostPlatform.libc != "musl";
 
   enableParallelBuilding = true;

pkgs/development/libraries/libsodium/mingw-no-fortify.patch

@@ -0,0 +1,15 @@
+diff -Naur libsodium-1.0.18-orig/configure.ac libsodium-1.0.18/configure.ac
+--- libsodium-1.0.18-orig/configure.ac	2019-05-30 16:20:24.000000000 -0400
++++ libsodium-1.0.18/configure.ac	2021-08-11 08:09:54.653907245 -0400
+@@ -217,11 +217,6 @@
+ 
+ AC_CHECK_DEFINE([__wasi__], [WASI="yes"], [])
+ 
+-AC_CHECK_DEFINE([_FORTIFY_SOURCE], [], [
+-  AX_CHECK_COMPILE_FLAG([-D_FORTIFY_SOURCE=2],
+-    [CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2"])
+-])
+-
+ AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],
+   [CFLAGS="$CFLAGS -fvisibility=hidden"])
+