> Maybe you need to refactor __glibcxx_digits so there is a version taking > the bitsize as an argument rather than using sizeof(T) * __CHAR_BIT__, but > that should be the only change needed to handle such types with the > existing macros. The bitsize macros should be the only ones needing > predefining to pass information to libstdc++.
Like this? #define __glibcxx_signed_b(T,B) ((T)(-1) < 0) #define __glibcxx_min_b(T,B) \ (__glibcxx_signed_b (T,B) ? -__glibcxx_max_b (T,B) - 1 : (T)0) #define __glibcxx_max_b(T,B) \ (__glibcxx_signed_b (T,B) ? \ (((((T)1 << (__glibcxx_digits_b (T,B) - 1)) - 1) << 1) + 1) : ~(T)0) #define __glibcxx_digits_b(T,B) \ (B - __glibcxx_signed_b (T,B)) // The fraction 643/2136 approximates log10(2) to 7 significant digits. #define __glibcxx_digits10_b(T,B) \ (__glibcxx_digits_b (T,B) * 643L / 2136) #define __glibcxx_signed(T) \ __glibcxx_signed_b (T, sizeof(T) * __CHAR_BIT__) #define __glibcxx_min(T) \ __glibcxx_min (T, sizeof(T) * __CHAR_BIT_) #define __glibcxx_max(T) \ __glibcxx_max (T, sizeof(T) * __CHAR_BIT_) #define __glibcxx_digits(T) \ __glibcxx_digits (T, sizeof(T) * __CHAR_BIT_) #define __glibcxx_digits10(T) \ __glibcxx_digits10 (T, sizeof(T) * __CHAR_BIT_)
