Good day -

A 'yum update' today would result in
    gcc-4.8.5-28.el7
and all GCC subpackages being upgraded to
    gcc-4.8.5-28.el7_5.1
- why ? gcc-4.8.5-28.el7 was only upgraded last week .

But the GCC errata page @
   https://www.scientificlinux.org/category/sl-errata/slsa-20180849-1/
makes no mention of this update
( according to that page, the latest GCC is gcc-4.8.5-28.el7,
  issued 2018-04-10 .
).

Also, a search of the SCIENTIFIC-LINUX-ERRATA mailing list
makes no mention of this gcc update.

Moreover, having downloaded the gcc-4.8.5-28.el7_5.1 SRPM,
there is no ChangeLog entry later than  :
'
* Tue Mar 27 2018 Jeff Law <[log in to unmask]> 4.8.5-29
- s390 retpoline support for spectre mitigation
' .

Until now, I've been able to rely on SL errata reports /
SRPM ChangeLogs telling me why a package is being
changed, which is one of the main reasons I run
SL at work.

Until I can discover exactly what changes  gcc-4.8.5-28.el7_5.1
has made wrt  gcc-4.8.5-28.el7, about which there appears to
be no documentation at all, I cannot apply this update to our
systems.

Please, could anyone provide a ChangeLog for  gcc-4.8.5-28.el7_5.1
changes wrt  gcc-4.8.5-28.el7 ?

Thanks  & Best Regards,
Jason