From 462cd0724a289fbbe8d5d8847c1a8e8f2fdcbc3d Mon Sep 17 00:00:00 2001
From: squidbus <175574877+squidbus@users.noreply.github.com>
Date: Wed, 17 Jun 2026 09:56:02 -0700
Subject: [PATCH] build: Put system library use behind flag (#4576)

---
 CMakeLists.txt | 72 +++++++++++++++++++++++---------------------------
 1 file changed, 33 insertions(+), 39 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 60870e136..262bf5cb0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,6 +39,7 @@ cmake_dependent_option(ENABLE_SYSTEM_VULKAN "Enable the system Vulkan driver" OF
 option(ENABLE_DISCORD_RPC "Enable the Discord RPC integration" ON)
 option(ENABLE_UPDATER "Enables the options to updater" ON)
 option(ENABLE_TESTS "Build unit tests (requires GTest)" OFF)
+option(ENABLE_SYSTEM_LIBRARIES "Enable building against system libraries" OFF)
 
 # First, determine whether to use CMAKE_OSX_ARCHITECTURES or CMAKE_SYSTEM_PROCESSOR.
 if (APPLE AND CMAKE_OSX_ARCHITECTURES)
@@ -230,46 +231,39 @@ if(NOT (GIT_REMOTE_URL_LOWER MATCHES "shadps4-emu/shadps4" AND (GIT_BRANCH STREQ
     set(ENABLE_UPDATER OFF)
 endif()
 
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
-find_package(Boost 1.84.0 CONFIG)
-find_package(CLI11 2.6.1 CONFIG)
-find_package(FFmpeg 5.1.2 MODULE)
-find_package(fmt 12.0.0 CONFIG)
-find_package(Freetype 2.14.1 MODULE)
-find_package(glslang 15 CONFIG)
-find_package(half 1.12.0 MODULE)
-find_package(magic_enum 0.9.7 CONFIG)
-find_package(miniupnpc 2.3.3 MODULE)
-find_package(miniz 3.1 CONFIG)
-find_package(nlohmann_json 3.12 CONFIG)
-find_package(PNG 1.6 MODULE)
-find_package(OpenAL CONFIG)
-find_package(LibreSSL 4.3.1 MODULE)
-find_package(RenderDoc 1.6.0 MODULE)
-find_package(SDL3 3.1.2 CONFIG)
-find_package(stb MODULE)
-find_package(toml11 4.2.0 CONFIG)
-find_package(tsl-robin-map 1.3.0 CONFIG)
-find_package(VulkanHeaders 1.4.330 CONFIG)
-find_package(VulkanMemoryAllocator 3.1.0 CONFIG)
-find_package(xbyak 7.07 CONFIG)
-find_package(xxHash 0.8.2 MODULE)
-find_package(ZLIB 1.3 MODULE)
-find_package(Zydis 5.0.0 MODULE)
-find_package(pugixml 1.14 CONFIG)
-if (APPLE)
-    find_package(date 3.0.1 CONFIG)
-    find_package(epoll-shim 3.14 CONFIG)
-endif()
-list(POP_BACK CMAKE_MODULE_PATH)
-
-if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
-    # libc++ requires -fexperimental-library to enable std::jthread and std::stop_token support.
-    include(CheckCXXSymbolExists)
-    check_cxx_symbol_exists(_LIBCPP_VERSION version LIBCPP)
-    if(LIBCPP)
-        add_compile_options(-fexperimental-library)
+if (ENABLE_SYSTEM_LIBRARIES)
+    list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+    find_package(Boost 1.84.0 CONFIG)
+    find_package(CLI11 2.6.1 CONFIG)
+    find_package(FFmpeg 5.1.2 MODULE)
+    find_package(fmt 12.0.0 CONFIG)
+    find_package(Freetype 2.14.1 MODULE)
+    find_package(glslang 15 CONFIG)
+    find_package(half 1.12.0 MODULE)
+    find_package(magic_enum 0.9.7 CONFIG)
+    find_package(miniupnpc 2.3.3 MODULE)
+    find_package(miniz 3.1 CONFIG)
+    find_package(nlohmann_json 3.12 CONFIG)
+    find_package(PNG 1.6 MODULE)
+    find_package(OpenAL CONFIG)
+    find_package(LibreSSL 4.3.1 MODULE)
+    find_package(RenderDoc 1.6.0 MODULE)
+    find_package(SDL3 3.1.2 CONFIG)
+    find_package(stb MODULE)
+    find_package(toml11 4.2.0 CONFIG)
+    find_package(tsl-robin-map 1.3.0 CONFIG)
+    find_package(VulkanHeaders 1.4.330 CONFIG)
+    find_package(VulkanMemoryAllocator 3.1.0 CONFIG)
+    find_package(xbyak 7.07 CONFIG)
+    find_package(xxHash 0.8.2 MODULE)
+    find_package(ZLIB 1.3 MODULE)
+    find_package(Zydis 5.0.0 MODULE)
+    find_package(pugixml 1.14 CONFIG)
+    if (APPLE)
+        find_package(date 3.0.1 CONFIG)
+        find_package(epoll-shim 3.14 CONFIG)
     endif()
+    list(POP_BACK CMAKE_MODULE_PATH)
 endif()
 
 add_subdirectory(externals)