https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98384
--- Comment #12 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> --- > --- Comment #11 from Patrick Palka <ppalka at gcc dot gnu.org> --- > I posted a patch at > https://gcc.gnu.org/pipermail/gcc-patches/2021-February/565726.html that does > this, but also salvages the verification via printf by first checking if the > leading hex digit of the printf output agrees with that of to_chars. > Conveniently, the patch sidesteps the question of choosing a consistent > representation vs shortest representation :) I've just tested the patch on both i386-pc-solaris2.11 and sparc-sun-solaris2.11 (32 and 64-bit each): as before, the 32-bit test XFAILs while the 64-bit test continues to FAIL: before: /vol/gcc/src/hg/master/local/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc:104: void test01(): Assertion '!strcmp(to_chars_buffer, printf_buffer+strlen("0x"))' failed. now: /vol/gcc/src/hg/master/local/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc:192: void test02(): Assertion '!memcmp(printf_buffer, to_chars_buffer, output_length)' failed.
