fix cmake defaults/include stuff for Sequoia

Signed-off-by: crueter <crueter@eden-emu.dev>

CMakeLists.txt

@@ -193,6 +193,8 @@ cmake_dependent_option(YUZU_USE_BUNDLED_SDL2 "Download bundled SDL2 build" "${MS
 
 option(ENABLE_CUBEB "Enables the cubeb audio backend" ON)
 
+# See https://github.com/llvm/llvm-project/issues/123946
+# OpenBSD va_list doesn't play nice with precompiled headers
 set(EXT_DEFAULT OFF)
 if (MSVC OR ANDROID)
     set(EXT_DEFAULT ON)
@@ -463,15 +465,16 @@ if (YUZU_USE_CPM)
         add_library(zstd::libzstd ALIAS libzstd_static)
     endif()
 
-    if (NOT YUZU_STATIC_ROOM)
-        # nlohmann
-        AddJsonPackage(nlohmann)
-
-        # zlib
-        AddJsonPackage(zlib)
-
-        if (ZLIB_ADDED)
-            add_library(ZLIB::ZLIB ALIAS zlibstatic)
+    # Opus
+    AddJsonPackage(opus)
+    if (NOT TARGET Opus::opus)
+        add_library(Opus::opus ALIAS opus)
+    endif()
+    if (Opus_ADDED)
+        if (MSVC AND CXX_CLANG)
+            target_compile_options(opus PRIVATE
+                -Wno-implicit-function-declaration
+            )
         endif()
 
         # Opus