From ce4362108a90033c5514a1d72230a6e91015f025 Mon Sep 17 00:00:00 2001
From: Erik Kundiman <erik@megapahit.org>
Date: Tue, 11 Jul 2023 10:41:11 +0800
Subject: OpenAL system lib flags by checking frealut module

---
 indra/cmake/OPENAL.cmake | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/indra/cmake/OPENAL.cmake b/indra/cmake/OPENAL.cmake
index 0b6a7c2853..cc7deac2d9 100644
--- a/indra/cmake/OPENAL.cmake
+++ b/indra/cmake/OPENAL.cmake
@@ -18,6 +18,17 @@ endif()
 
 if (USE_OPENAL)
   add_library( ll::openal INTERFACE IMPORTED )
+
+  if (NOT (USE_AUTOBUILD_3P OR USE_CONAN))
+    target_compile_definitions( ll::openal INTERFACE LL_OPENAL=1)
+    include(FindPkgConfig)
+    pkg_check_modules(Openal REQUIRED freealut)
+    target_include_directories(ll::openal SYSTEM INTERFACE ${Openal_INCLUDE_DIRS})
+    target_link_directories(ll::openal INTERFACE ${Openal_LIBRARY_DIRS})
+    target_link_libraries(ll::openal INTERFACE ${Openal_LIBRARIES})
+    return ()
+  endif ()
+
   target_include_directories( ll::openal SYSTEM INTERFACE "${LIBS_PREBUILT_DIR}/include/AL")
   target_compile_definitions( ll::openal INTERFACE LL_OPENAL=1)
   use_prebuilt_binary(openal)
-- 
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