--- qemu-0.o/configure
+++ qemu-0/configure
@@ -393,7 +393,7 @@
 if test "$mingw32" = "yes" ; then
   echo "CONFIG_WIN32=yes" >> $config_mak
   echo "#define CONFIG_WIN32 1" >> $config_h
-elif test -f "/usr/include/byteswap.h" ; then
+elif echo '#include <byteswap.h>' | $cc -x c -c -o $TMPO -; then
   echo "#define HAVE_BYTESWAP_H 1" >> $config_h
 fi
 if test "$darwin" = "yes" ; then