--- m4-1.4.17/tests/test-isnanl.h.ori

+++ m4-1.4.17/tests/test-isnanl.h

@@ -51,6 +51,15 @@ main ()

   /* A bit pattern that is different from a Quiet NaN.  With a bit of luck,

      it's a Signalling NaN.  */

   {

+#if defined __powerpc__ && LDBL_MANT_DIG == 106

+    /* This is PowerPC "double double", a pair of two doubles.  Inf and Nan are

+       represented as the corresponding 64-bit IEEE values in the first double;

+       the second is ignored.  Manipulate only the first double.  */

+    #undef NWORDS

+    #define NWORDS \

+      ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))

+#endif

+

     memory_long_double m;

     m.value = NaNl ();

 # if LDBL_EXPBIT0_BIT > 0