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+2012-09-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Assume C89 or later for math functions (Bug#12381).
+        * configure.ac (frexp, fmod): Remove checks for these functions,
+        as we now assume them.
+        (FLOAT_CHECK_DOMAIN, HAVE_INVERSE_HYPERBOLIC, NO_MATHERR)
+        (HAVE_EXCEPTION):
+        Remove; no longer needed.
+
 2012-09-07  Paul Eggert  <eggert@cs.ucla.edu>
 
         More signal-handler cleanup (Bug#12327).