cpp-netlib: pin boost to 186, unbreak on darwin (#405480)

pkgs/by-name/cp/cpp-netlib/0001-Compatibility-with-boost-1.83.patch

@@ -0,0 +1,33 @@
+From 8be99f5972826c25378bccb9fbd7291623c7b2a7 Mon Sep 17 00:00:00 2001
+From: Moraxyc <i@qaq.li>
+Date: Fri, 9 May 2025 13:39:17 +0800
+Subject: [PATCH] Compatibility with boost 1.83
+
+---
+ boost/network/protocol/http/server/impl/parsers.ipp | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/boost/network/protocol/http/server/impl/parsers.ipp b/boost/network/protocol/http/server/impl/parsers.ipp
+index c31e60e..3272c2f 100755
+--- a/boost/network/protocol/http/server/impl/parsers.ipp
++++ b/boost/network/protocol/http/server/impl/parsers.ipp
+@@ -13,6 +13,7 @@
+ #include <tuple>
+ #include <boost/fusion/include/std_tuple.hpp>
+ #include <boost/network/protocol/http/message/header.hpp>
++#include <boost/regex/pending/unicode_iterator.hpp>
+ 
+ #ifdef BOOST_NETWORK_NO_LIB
+ #ifndef BOOST_NETWORK_INLINE
+@@ -32,7 +33,7 @@ typedef std::basic_string<uint32_t> u32_string;
+ template <>  // <typename Attrib, typename T, typename Enable>
+ struct assign_to_container_from_value<std::string, u32_string, void> {
+   static void call(u32_string const& val, std::string& attr) {
+-    u32_to_u8_iterator<u32_string::const_iterator> begin = val.begin(),
++    boost::u32_to_u8_iterator<u32_string::const_iterator> begin = val.begin(),
+                                                    end = val.end();
+     for (; begin != end; ++begin) attr += *begin;
+   }
+-- 
+2.48.1
+

pkgs/by-name/cp/cpp-netlib/package.nix

@@ -3,11 +3,15 @@
   stdenv,
   fetchFromGitHub,
   cmake,
-  boost181,
+  boost186,
   openssl,
+  llvmPackages_18,
 }:
-
-stdenv.mkDerivation rec {
+let
+  # std::char_traits has been removed
+  stdenvForCppNetlib = if stdenv.hostPlatform.isDarwin then llvmPackages_18.stdenv else stdenv;
+in
+stdenvForCppNetlib.mkDerivation rec {
   pname = "cpp-netlib";
   version = "0.13.0-final";
 
@@ -19,9 +23,15 @@ stdenv.mkDerivation rec {
     fetchSubmodules = true;
   };
 
+  patches = [
+    # 'u32_to_u8_iterator' was not declared
+    ./0001-Compatibility-with-boost-1.83.patch
+  ];
+
   nativeBuildInputs = [ cmake ];
   buildInputs = [
-    boost181
+    # io_service.hpp has been removed in boost 1.87+
+    boost186
     openssl
   ];