From 227807df36e8bf8215372ca2dd0c4919390b925b Mon Sep 17 00:00:00 2001
From: orbea <orbea@fredslev.dk>
Date: Sun, 22 Jul 2018 11:01:53 -0700
Subject: [PATCH] cmake: Support system cubeb builds.

---
 CMake/FindCubeb.cmake | 15 +++++++++++++++
 CMakeLists.txt        |  8 +++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 CMake/FindCubeb.cmake

diff --git a/CMake/FindCubeb.cmake b/CMake/FindCubeb.cmake
new file mode 100644
index 0000000000..c0a730c7ab
--- /dev/null
+++ b/CMake/FindCubeb.cmake
@@ -0,0 +1,15 @@
+find_path(CUBEB_INCLUDE_DIR cubeb.h PATH_SUFFIXES cubeb)
+find_library(CUBEB_LIBRARY cubeb)
+mark_as_advanced(CUBEB_INCLUDE_DIR CUBEB_LIBRARY)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(CUBEB DEFAULT_MSG
+	CUBEB_INCLUDE_DIR CUBEB_LIBRARY)
+
+if(CUBEB_FOUND AND NOT TARGET CUBEB)
+  add_library(cubeb::cubeb UNKNOWN IMPORTED)
+  set_target_properties(cubeb::cubeb PROPERTIES
+    IMPORTED_LOCATION "${CUBEB_LIBRARY}"
+    INTERFACE_INCLUDE_DIRECTORIES "${CUBEB_INCLUDE_DIR}"
+  )
+endif()
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a0e380e91..f6e43a80c7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -611,7 +611,13 @@ endif()
 add_subdirectory(Externals/soundtouch)
 include_directories(Externals)
 
-add_subdirectory(Externals/cubeb EXCLUDE_FROM_ALL)
+find_package(Cubeb)
+if(CUBEB_FOUND)
+  message(STATUS "Using the system cubeb")
+else()
+  message(STATUS "Using static cubeb from Externals")
+  add_subdirectory(Externals/cubeb EXCLUDE_FROM_ALL)
+endif()
 
 if(NOT ANDROID)
   add_definitions(-D__LIBUSB__)