avoid automagic for soxr
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -256,12 +256,10 @@ if(NOT WIN32 AND NOT ANDROID)
     endif()
   endif()
 
-  pkg_search_module(SOXR soxr)
-  if(SOXR_FOUND)
+  if(BUILD_WITH_SOXR)
+    pkg_search_module(SOXR REQUIRED soxr)
     add_compile_definitions(HAS_SOXR)
-  else()
-    message(STATUS "soxr not found")
-  endif(SOXR_FOUND)
+  endif()
 
   if(BUILD_WITH_FLAC)
     pkg_search_module(FLAC REQUIRED flac)