--- a/flang/lib/Decimal/binary-to-decimal.cpp	Wed Jul 21 10:27:27 2021 +0900
+++ b/flang/lib/Decimal/binary-to-decimal.cpp	Wed Nov 09 17:45:10 2022 +0900
@@ -9,6 +9,7 @@
 #include "big-radix-floating-point.h"
 #include "flang/Decimal/decimal.h"
 #include <cassert>
+#include <cfloat>
 #include <string>
 
 namespace Fortran::decimal {
@@ -310,7 +311,6 @@
         more.Next();
       }
       number.Minimize(Big{less, rounding}, Big{more, rounding});
-    } else {
     }
     return number.ConvertToDecimal(buffer, size, flags, digits);
   }
@@ -350,14 +350,14 @@
       rounding, Fortran::decimal::BinaryFloatingPointNumber<53>(x));
 }
 
-#if LONG_DOUBLE == 80
+#if LDBL_MANT_DIG == 64
 ConversionToDecimalResult ConvertLongDoubleToDecimal(char *buffer,
     std::size_t size, enum DecimalConversionFlags flags, int digits,
     enum FortranRounding rounding, long double x) {
   return Fortran::decimal::ConvertToDecimal(buffer, size, flags, digits,
       rounding, Fortran::decimal::BinaryFloatingPointNumber<64>(x));
 }
-#elif LONG_DOUBLE == 128
+#elif LDBL_MANT_DIG == 113
 ConversionToDecimalResult ConvertLongDoubleToDecimal(char *buffer,
     std::size_t size, enum DecimalConversionFlags flags, int digits,
     enum FortranRounding rounding, long double x) {