build: find and link to Threads::Threads

CMakeLists.txt

@@ -1,7 +1,10 @@
 cmake_minimum_required(VERSION 3.25)
 project(fx C ASM)
 
-set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+
+find_package(Threads REQUIRED)
+
 include (TestBigEndian)
 include(Templates)
 include(Platform)
@@ -15,7 +18,6 @@ else ()
 	add_compile_definitions(FX_ENDIAN=0)
 endif ()
 
-
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_EXTENSIONS OFF)
 
@@ -62,3 +64,9 @@ endforeach (assembly)
 if (fx_enable_tests)
 	add_subdirectory(test)
 endif ()
+
+set_target_properties(
+    ${fx_assemblies}
+    PROPERTIES
+    INSTALL_RPATH
+    "${CMAKE_INSTALL_RPATH};${CMAKE_INSTALL_PREFIX}/lib")