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diff --git a/ChangeLog b/ChangeLog
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+2012-12-09         Arnold D. Robbins     <arnold@skeeve.com>
+
+	Clean up BINMODE to use symbolic values.
+
+	* awk.h (enum binmode_values): New enum.
+	* eval.c (set_BINMODE): Use them.
+	* io.c (binmode, close_rp, gawk_popen): Ditto.
+	* main.c (main): Ditto.
+	* builtin.c (do_system): Ditto.
+
+	Unrelated:
+
+	* configure.ac: Look for posix_openpt
+	* io.c (two_way_open): Use posix_openpt if it's available.
+	Thanks to Christian Weisgerber <naddy@mips.inka.de> for
+	the changes.
+
 2012-12-07         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* awkgram.y (tokentab): `fflush()' is now in POSIX, remove the