From afde3a0e0d2bc49a5d890d16611432aa6eb76428 Mon Sep 17 00:00:00 2001
From: Maxime Gauduin <alucryd@archlinux.org>
Date: Thu, 22 Dec 2022 15:38:28 +0100
Subject: [PATCH] try for system libmgba first

---
 CMake/FindLIBMGBA.cmake | 15 +++++++++++++++
 CMakeLists.txt          |  7 +++++--
 2 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 CMake/FindLIBMGBA.cmake

diff --git a/CMake/FindLIBMGBA.cmake b/CMake/FindLIBMGBA.cmake
new file mode 100644
index 0000000000..21e2c84445
--- /dev/null
+++ b/CMake/FindLIBMGBA.cmake
@@ -0,0 +1,15 @@
+find_path(LIBMGBA_INCLUDE_DIR flags.h PATH_SUFFIXES mgba)
+find_library(LIBMGBA_LIBRARY mgba)
+mark_as_advanced(LIBMGBA_INCLUDE_DIR LIBMGBA_LIBRARY)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LIBMGBA DEFAULT_MSG
+	LIBMGBA_INCLUDE_DIR LIBMGBA_LIBRARY)
+
+if(LIBMGBA_FOUND AND NOT mGBA::mgba)
+  add_library(mGBA::mgba UNKNOWN IMPORTED)
+  set_target_properties(mGBA::mgba PROPERTIES
+    IMPORTED_LOCATION "${LIBMGBA_LIBRARY}"
+    INTERFACE_INCLUDE_DIRECTORIES "${LIBMGBA_INCLUDE_DIR}"
+  )
+endif()
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 799ddcb238..bf3a50789f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -944,8 +944,11 @@ if(NOT ENABLE_QT)
   set(USE_MGBA 0)
 endif()
 if(USE_MGBA)
-  message(STATUS "Using static libmgba from Externals")
-  add_subdirectory(Externals/mGBA)
+  find_package(LIBMGBA)
+  if(NOT LIBMGBA_FOUND)
+    message(STATUS "Using static libmgba from Externals")
+    add_subdirectory(Externals/mGBA)
+  endif()
 endif()
 
 find_package(SYSTEMD)