updated for version 7.2b-011
diff --git a/src/configure.in b/src/configure.in
index 7c65fab..49acc19 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -866,7 +866,7 @@
TCL_LIBS=`eval echo "$TCL_LIB_SPEC $TCL_LIBS"`
dnl Use $TCL_DEFS for -D_THREAD_SAFE et al. But only use the
dnl "-D_ABC" items. Watch out for -DFOO=long\ long.
- TCL_DEFS=`echo $TCL_DEFS | sed -e 's/\\\\ /\\\\X/g' | tr ' ' '\012' | sed -e '/^-[[^D]]/d' -e '/-D[[^_]]/d' -e 's/-D_/ -D_/' | tr '\012' ' ' | sed -e 's/\\\\X/\\\\ /g'`
+ TCL_DEFS=`echo $TCL_DEFS | sed -e 's/\\\\ /\\\\X/g' | tr ' ' '\012' | sed -e '/^[[^-]]/d' -e '/^-[[^D]]/d' -e '/-D[[^_]]/d' -e 's/-D_/ -D_/' | tr '\012' ' ' | sed -e 's/\\\\X/\\\\ /g'`
break
fi
done