For the next MPFR major release (4.1.0), we plan to change __float128 to _Float128 (with a fallback to __float128 when necessary): int mpfr_set_float128 (mpfr_ptr, __float128, mpfr_rnd_t); __float128 mpfr_get_float128 (mpfr_srcptr, mpfr_rnd_t); will become int mpfr_set_float128 (mpfr_ptr, _Float128, mpfr_rnd_t); _Float128 mpfr_get_float128 (mpfr_srcptr, mpfr_rnd_t); (note: these prototypes are defined only when the user defines MPFR_WANT_FLOAT128). If I understand the GCC manual correctly, __float128 and _Float128, when they both exist, are not necessarily the same type, though they have the same representation (specified by IEEE 754-2008). Can this be regarded as an incompatible change for the ABI? I mean, if a program has been built against a MPFR version with __float128, can it still be linked against a MPFR version with _Float128 without any error? -- Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
