README: changed URL format to <URL:...>; added section on Tk.
Makefile.in: run config.status in "make recheck".
configure.in: add test for hypot().
config.h.in, configure: since configure.in changed.
rest: the usual boring stuff.
diff --git a/configure.in b/configure.in
index ae7431d..34af46f 100644
--- a/configure.in
+++ b/configure.in
@@ -295,5 +295,11 @@
 else AC_ERROR(proper usage is --with-libc=STRING)
 fi])
 
+# check for hypot() in math library
+LIBS_SAVE=$LIBS
+LIBS="$LIBS $LIBM"
+AC_CHECK_FUNCS(hypot)
+LIBS=$LIBS_SAVE
+
 # generate output files
 AC_OUTPUT(Makefile Objects/Makefile Parser/Makefile Python/Makefile Modules/Makefile.pre)