Thanks Robert. These old gcc versions are still inbox in many distros. After reading BZ 59124 I see the hack of a fix to disable the warning is:
diff --git a/init.c b/init.c
index 353c99b..0fae65b 100644
--- a/init.c
+++ b/init.c
@@ -1043,7 +1043,7 @@ void td_fill_rand_seeds(struct thread_data *td)
bool use64;
if (td->o.allrand_repeatable) {
- unsigned int i;
+ unsigned long i;
for (i = 0; i < FIO_RAND_NR_OFFS; i++)
td->rand_seeds[i] = FIO_RANDSEED * td->thread_number
Works on gcc version 4.8.3 20140911. But, doesn't seem we need the fix as it's a real gcc bug.
Regards,
Jeff
-----Original Message-----
From: Elliott, Robert (Persistent Memory) [mailto:elliott@xxxxxxx]
Sent: Monday, June 18, 2018 12:52 PM
To: Jeff Furlong <jeff.furlong@xxxxxxx>; Sitsofe Wheeler <sitsofe@xxxxxxxxx>
Cc: fio@xxxxxxxxxxxxxxx
Subject: RE: fio make warning
> -----Original Message-----
> From: fio-owner@xxxxxxxxxxxxxxx [mailto:fio-owner@xxxxxxxxxxxxxxx] On
> Behalf Of Jeff Furlong
> Sent: Friday, June 15, 2018 6:00 PM
> To: Sitsofe Wheeler <sitsofe@xxxxxxxxx>
> Cc: fio@xxxxxxxxxxxxxxx
> Subject: RE: fio make warning
>
> Right, using the latest git. I checked the latest releases and
> fio-3.5 does not have the warning, but fio-3.6 introduces it. I was
> using gcc version 4.8.3 20140911. I moved to gcc version 4.8.5
> 20150623 on another kernel and I don't see the issue. Odd how the
> warning only happens with in between compiler versions and latest fio source.
gcc apparently had some bugs in that area four years ago:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56273
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59124
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