On Sun, 3 May 2015, Henning Thedens wrote:
On my System (Ubuntu14.04 on an Intel Sandy-bridge) gcc 4.9.2 builds gmp 6.0.0.a fine with -flto -fuse-linker-plugin as CFLAGS, but testing gives the following error:
mpz_get_d_2exp wrong on 2**54-1
result out of range, expect 0.5 <= got < 1.0
rnd_mode = 0
data[i] = 54
z =0x3FFFFFFFFFFFFF
got =[00 00 00 00 00 00 F0 3F] 1
got exp 54
Adding -ffat-lto-objects to the flags, testing gives no errors.
Is this an gcc problem?
There was an discussion on gmplib.org about this error on GMP 5.1 using Clang, but i did not figure out whether there was any resolution.
I assume you are talking about this thread?
https://gmplib.org/list-archives/gmp-bugs/2013-August/003115.html
But the following posts say quite clearly that the issues are in GMP, not
in the compilers (so this is the wrong list). I don't think it was fixed,
but you could download a snapshot from gmplib.org and test it.
--
Marc Glisse
