cpptoml: add patch for GCC 11

(cherry picked from commit fcb99bc19c)
(cherry picked from commit af860c5e0315fb3e656748bd0276c60f3a0f4037)

pkgs/by-name/cp/cpptoml/add-limits-include.patch

@@ -0,0 +1,21 @@
+From c55a516e90133d89d67285429c6474241346d27a Mon Sep 17 00:00:00 2001
+From: Dirk Eddelbuettel <edd@debian.org>
+Date: Mon, 30 Nov 2020 09:41:49 -0600
+Subject: [PATCH] g++-11 requires limits header
+
+---
+ include/cpptoml.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/include/cpptoml.h b/include/cpptoml.h
+index 5a00da3..1dc9fd1 100644
+--- a/include/cpptoml.h
++++ b/include/cpptoml.h
+@@ -14,6 +14,7 @@
+ #include <cstring>
+ #include <fstream>
+ #include <iomanip>
++#include <limits>
+ #include <map>
+ #include <memory>
+ #include <sstream>

pkgs/by-name/cp/cpptoml/package.nix

@@ -11,6 +11,12 @@ stdenv.mkDerivation rec {
     sha256 = "0zlgdlk9nsskmr8xc2ajm6mn1x5wz82ssx9w88s02icz71mcihrx";
   };
 
+  patches = [
+    # Fix compilation with GCC 11.
+    # <https://github.com/skystrife/cpptoml/pull/123>
+    ./add-limits-include.patch
+  ];
+
   nativeBuildInputs = [ cmake ];
 
   cmakeFlags = [