From 492aa3cb1015c69b8f49a1929c8cc48001250648 Mon Sep 17 00:00:00 2001
From: Castor215 <132155746+Castor215@users.noreply.github.com>
Date: Sat, 7 Oct 2023 05:49:56 +0100
Subject: [PATCH] externals: allow user to use system dynarmic (#7044)

---
 CMakeLists.txt           |  1 +
 externals/CMakeLists.txt | 17 ++++++++++++++---
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 67f380bc23..cfc5e22b21 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,6 +97,7 @@ option(USE_SYSTEM_CPP_JWT "Use the system cpp-jwt (instead of the bundled one)"
 option(USE_SYSTEM_SOUNDTOUCH "Use the system SoundTouch (instead of the bundled one)" OFF)
 option(USE_SYSTEM_CPP_HTTPLIB "Use the system cpp-httplib (instead of the bundled one)" OFF)
 option(USE_SYSTEM_JSON "Use the system JSON (nlohmann-json3) package (instead of the bundled one)" OFF)
+option(USE_SYSTEM_DYNARMIC "Use the system dynarmic (instead of the bundled one)" OFF)
 
 if (CITRA_USE_PRECOMPILED_HEADERS)
     message(STATUS "Using Precompiled Headers.")
diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index 9f50bbc73d..37684654bc 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -78,9 +78,20 @@ endif()
 
 # Dynarmic
 if ("x86_64" IN_LIST ARCHITECTURE OR "arm64" IN_LIST ARCHITECTURE)
-    set(DYNARMIC_TESTS OFF CACHE BOOL "")
-    set(DYNARMIC_FRONTENDS "A32" CACHE STRING "")
-    add_subdirectory(dynarmic EXCLUDE_FROM_ALL)
+    if(USE_SYSTEM_DYNARMIC)
+        find_package(dynarmic REQUIRED)
+        add_library(dynarmic INTERFACE)
+        target_link_libraries(dynarmic INTERFACE dynarmic::dynarmic)
+        # The dynarmic package's cmake files are helpfully completely silent
+        # so we have to inform the user of its status ourselves
+        if(TARGET dynarmic::dynarmic)
+            message(STATUS "Found dynarmic")
+        endif()
+    else()
+        set(DYNARMIC_TESTS OFF CACHE BOOL "")
+        set(DYNARMIC_FRONTENDS "A32" CACHE STRING "")
+        add_subdirectory(dynarmic EXCLUDE_FROM_ALL)
+    endif()
 endif()
 
 # getopt