# Stops OpenAL Soft's build system from unconditionally enabling the `-pthread` compiler flag when targeting Emscripten because it causes problems if the rest of mkxp-z isn't also building with pthread support.

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -579,7 +579,10 @@ if(NOT WIN32)
         message(FATAL_ERROR "PThreads is required for non-Windows builds!")
     endif()
 
-    check_c_compiler_flag(-pthread HAVE_PTHREAD)
+    string(TOLOWER ${CMAKE_SYSTEM_NAME} SYSTEM_LOWER)
+    if(NOT SYSTEM_LOWER STREQUAL "emscripten")
+        check_c_compiler_flag(-pthread HAVE_PTHREAD)
+    endif()
     if(HAVE_PTHREAD)
         set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -pthread")
         set(C_FLAGS ${C_FLAGS} -pthread)