--- rtaudio-4.1.2/configure.ac
+++ rtaudio-4.1.2/configure.ac
@@ -62,8 +62,7 @@
 AC_MSG_CHECKING(whether to compile debug version)
 AC_ARG_ENABLE(debug,
   [AS_HELP_STRING([--enable-debug],[enable various debug output])],
-  [: ${CXXFLAGS="-g -O0"};] [AC_DEFINE([__RTAUDIO_DEBUG__])],
-  [: ${CXXFLAGS="-O3"}])
+  [AC_DEFINE([__RTAUDIO_DEBUG__])], )
 
 # Checks for programs.
 AC_PROG_CXX(g++ CC c++ cxx)