apacheHttpdPackages.mod_tile: Support for Mapnik >=v4.0.0-rc2

pkgs/servers/http/apache-modules/mod_tile/default.nix

@@ -29,6 +29,11 @@ stdenv.mkDerivation rec {
     hash = "sha256-zXUwTG8cqAkY5MC1jAc2TtMgNMQPLc5nc22okVYP4ME=";
   };
 
+  patches = [
+    # Support Mapnik >= v4.0.0-rc2 (boost:optional no longer used)
+    ./mod_tile-std_optional.patch
+  ];
+
   nativeBuildInputs = [
     cmake
     pkg-config
@@ -64,6 +69,8 @@ stdenv.mkDerivation rec {
   installFlags = [ "DESTDIR=$(out)" ];
 
   doCheck = true;
+  # Do not run tests in parallel
+  enableParallelChecking = false;
 
   passthru.updateScript = nix-update-script { };
 

pkgs/servers/http/apache-modules/mod_tile/mod_tile-std_optional.patch

@@ -0,0 +1,26 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index e68d2e9..ddba150 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -48,7 +48,7 @@ find_package(LIBMEMCACHED)
+ find_package(LIBRADOS)
+ 
+ if(LIBMAPNIK_VERSION STRGREATER_EQUAL "4")
+-  set(CMAKE_CXX_STANDARD 14)
++  set(CMAKE_CXX_STANDARD 17)
+ endif()
+ 
+ # Programs
+diff --git a/src/parameterize_style.cpp b/src/parameterize_style.cpp
+index 8db7122..7100735 100644
+--- a/src/parameterize_style.cpp
++++ b/src/parameterize_style.cpp
+@@ -72,7 +74,7 @@ static void parameterize_map_language(mapnik::Map &m, char * parameter)
+ 		mapnik::parameters params = l.datasource()->params();
+ 
+ 		if (params.find("table") != params.end()) {
+-			boost::optional<std::string> table = params.get<std::string>("table");
++			auto table = params.get<std::string>("table");
+ 
+ 			if (table && table->find(",name") != std::string::npos) {
+ 				std::string str = *table;