From e01e6d92937b66e83cb566f99c853d48caff515f Mon Sep 17 00:00:00 2001
From: Ryan Houdek <Sonicadvance1@gmail.com>
Date: Mon, 5 Jul 2021 17:39:19 -0700
Subject: [PATCH 1/2] Adds xxhash external submodule

---
 .gitmodules     | 3 +++
 External/xxhash | 1 +
 2 files changed, 4 insertions(+)
 create mode 160000 External/xxhash

diff --git a/.gitmodules b/.gitmodules
index a49f799a05..da27bc313e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -39,3 +39,6 @@
 [submodule "External/drm-headers"]
 	path = External/drm-headers
 	url = https://github.com/FEX-Emu/drm-headers.git
+[submodule "External/xxhash"]
+	path = External/xxhash
+	url = https://github.com/FEX-Emu/xxHash.git
diff --git a/External/xxhash b/External/xxhash
new file mode 160000
index 0000000000..86c1eb957e
--- /dev/null
+++ b/External/xxhash
@@ -0,0 +1 @@
+Subproject commit 86c1eb957e1722ebbc1761a84caeed03ba5082de

From 728e9fc1875f628edba6709b2d144f1ac2bad72d Mon Sep 17 00:00:00 2001
From: Ryan Houdek <Sonicadvance1@gmail.com>
Date: Mon, 5 Jul 2021 17:40:09 -0700
Subject: [PATCH 2/2] Use externals xxhash if not found installed

Also in the case that you don't have v0.8.0 minimum installed
---
 CMakeLists.txt                                  | 8 +++++++-
 External/FEXCore/Source/Interface/Core/Core.cpp | 2 +-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb5447e7be..df71d8955f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -105,7 +105,13 @@ endif()
 
 find_package(PkgConfig REQUIRED)
 find_package(Python 3.0 REQUIRED COMPONENTS Interpreter)
-pkg_check_modules(XXHASH libxxhash REQUIRED)
+pkg_check_modules(XXHASH libxxhash>=0.8.0 QUIET)
+
+if (NOT XXHASH_FOUND)
+  message(STATUS "xxHash not found. Using Externals")
+  add_subdirectory(External/xxhash/)
+  include_directories(External/xxhash/)
+endif()
 
 add_definitions(-Wno-trigraphs)
 add_definitions(-DGLOBAL_DATA_DIRECTORY="${DATA_DIRECTORY}/")
diff --git a/External/FEXCore/Source/Interface/Core/Core.cpp b/External/FEXCore/Source/Interface/Core/Core.cpp
index 4e155f2914..699e6c4fab 100644
--- a/External/FEXCore/Source/Interface/Core/Core.cpp
+++ b/External/FEXCore/Source/Interface/Core/Core.cpp
@@ -33,7 +33,7 @@ desc: Glues Frontend, OpDispatcher and IR Opts & Compilation, LookupCache, Dispa
 #include "Interface/HLE/Thunks/Thunks.h"
 #include "FEXCore/Utils/Allocator.h"
 
-#include <xxh3.h>
+#include <xxhash.h>
 #include <fstream>
 #include <unistd.h>
 #include <filesystem>