On 08/02/2018 01:46 PM, Martin Sebor wrote:
The recently added test gcc.dg/torture/builtin-sprintf.c to verify that the sprintf result computed by GCC matches libc's for Infinity and NaN has been failing on AIX which formats NaN as either QNaN or SNaN, contrary to C/POSIX requirements. The attached tweak adjusts the result computed by GCC to include the AIX format. If there are no objections I'll commit the tweak later this week and backport it to GCC 8 the next.
I have committed this change as r263312. In the longer term, I think it might be best to introduce an OS target hook to describe sprintf implementation-defined details like the format of infinite values (i.e., inf or infinity, nan or qnan/snan), and perhaps also %p format and anything else that might be relevant. I'll wait a bit before backporting it GCC 8 and 7 in case there are any comments/concerns. Martin
