Diff of /configure.ac [4ea31a] .. [7d35b3]

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--- a/configure.ac
+++ b/configure.ac
@@ -20,6 +20,8 @@
 fi
 TOPOH="$withOH"
 AC_SUBST(TOPOH)                     
+
+AC_CHECK_HEADERS([byteswap.h])
 
 AC_CHECK_LIB([pthread], [pthread_create], , [lpthread=no])
 if test X$lpthread = Xno; then