--- spack-src/src/krims/DataFiles/ieee_convert.cc.old	2020-10-20 12:35:49.635656789 +0900
+++ spack-src/src/krims/DataFiles/ieee_convert.cc	2020-10-20 13:21:34.031342615 +0900
@@ -24,8 +24,10 @@
 
 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 6)
 #define FLOAT128 __float128
+#ifdef __x86_64__
 #define FLOAT80 __float80
 #endif
+#endif
 
 // Useful resources:
 //     https://en.wikipedia.org/wiki/Double-precision_floating-point_format