Re: bug - boost::math::ccmath::copysign not work

From: Proton (matt_at_[hidden])
Date: 2022-08-22 01:41:50

> e.g. on x86 gcc (https://gcc.gnu.org/onlinedocs/gcc-12.2.0/gcc/x86-Options.html#x86-Options):
> x86_64 sizeof(long double) == 16
> x86_32 sizeof(long double) == 12
> This can also be changed with compiler flags, eg with gcc
> -m96bit-long-double
> -m128bit-long-double
> and/or
> -mlong-double-64
> -mlong-double-80
> -mlong-double-128

None of those fail on the PR branch. The appropriate representation of long double is macro enabled based on LDBL_MANT_DIG and LDBL_MAX_EXP.

Matt