AC_ARG_ENABLE(threads, [ --disable-threads disable POSIX threads],[enable_threads=$enableval],[enable_threads=yes])
if test "$enable_threads" = "yes" -a "$HAVETHREADS" = "0"; then
ACX_PTHREAD([
AC_ARG_ENABLE(threads, [ --disable-threads disable POSIX threads],[enable_threads=$enableval],[enable_threads=yes])
if test "$enable_threads" = "yes" -a "$HAVETHREADS" = "0"; then
ACX_PTHREAD([