ldmud: various build fixes (#360262)

pkgs/games/ldmud/default.nix

@@ -7,7 +7,7 @@
 , libiconv
 , pcre
 , libgcrypt
-, libxcrypt
+, libxcrypt-legacy
 , json_c
 , libxml2
 , ipv6Support ? false
@@ -37,11 +37,13 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-PkrjP7tSZMaj61Hsn++7+CumhqFPLbf0+eAI6afP9HA=";
   };
 
+  patches = [ ./libxml2-2.12.0-compat.patch ./mysql-compat.patch ];
+
   sourceRoot = "${src.name}/src";
 
   nativeBuildInputs =
     [ autoreconfHook pkg-config bison ];
-  buildInputs = [ libgcrypt libxcrypt pcre json_c libxml2 ]
+  buildInputs = [ libgcrypt libxcrypt-legacy pcre json_c libxml2 ]
     ++ lib.optional mccpSupport zlib ++ lib.optional mysqlSupport libmysqlclient
     ++ lib.optional postgresSupport libpq
     ++ lib.optional sqliteSupport sqlite ++ lib.optional tlsSupport openssl

pkgs/games/ldmud/libxml2-2.12.0-compat.patch

@@ -0,0 +1,18 @@
+diff --git src/pkg-xml2.c src/pkg-xml2.c
+index 048ca38c..9ea4de35 100644
+--- src/pkg-xml2.c
++++ src/pkg-xml2.c
+@@ -507,8 +507,13 @@ f_xml_generate (svalue_t *sp)
+     return sp;
+ }
+ 
++#if LIBXML_VERSION >= 21200
++static void
++xml_pkg_error_handler(void * userData, const xmlError *error)
++#else
+ static void
+ xml_pkg_error_handler(void * userData, xmlErrorPtr error)
++#endif
+ {
+     if (error)
+     {

pkgs/games/ldmud/mysql-compat.patch

@@ -0,0 +1,13 @@
+diff --git src/autoconf/configure.ac src/autoconf/configure.ac
+index 156e97f4..6d70bf33 100644
+--- src/autoconf/configure.ac
++++ src/autoconf/configure.ac
+@@ -1410,7 +1410,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #include <mysql.h>
+ #include <errmsg.h>
+ 
+-struct MYSQL * foo(void)
++struct st_mysql * foo(void)
+ {
+     static MYSQL var;
+