Reverts llvm/llvm-project#102147 It seems some systems which should support F128 are wrongly detected as not supporting. This might be due to checking `LDBL_MANT_DIG` instead of `__LDBL_MANT_DIG__`. I will investigate.
Reverts llvm/llvm-project#102147 It seems some systems which should support F128 are wrongly detected as not supporting. This might be due to checking `LDBL_MANT_DIG` instead of `__LDBL_MANT_DIG__`. I will investigate.