Release date: 
Friday, October 23, 2020 - 16:34
Affected Channels: 
Asianux Server 8 for x86_64

GCC Toolset is a compiler toolset that provides recent versions of development tools. GCC Toolset is an Application Stream packaged as a Software Collection.

For instructions on usage, see Using GCC Toolset linked from the References section. Components and specifics of this version are documented in the GCC Toolset 9 chapter.

Bug Fix(es):

* Certain Intel CPUs are affected by the Jump Conditional Code (JCC) bug causing machine instructions to be executed incorrectly. Consequently, the affected CPUs might not execute programs properly. The full fix involves updating the microcode of vulnerable CPUs, which can cause a performance degradation. This update enables a workaround in the assembler that helps to mitigate the performance loss. The workaround is not enabled by default.

To apply the workaround, recompile a program using GCC with the "-Wa,-mbranches-within-32B-boundaries" command-line option. A program recompiled with this command-line option will not be affected by JCC flaw, but the microcode update is still necessary in order to fully protect a system.

Note that applying the workaround will increase the size of the program and there can still be a slight performance decrease, although it should be less than it would have been without the recompilation.


Update packages.

Additional Info: 



  1. gcc-toolset-9-binutils-2.32-17.el8.src.rpm
    MD5: c47b9d7b546d1d332d775e93cbd250b7
    SHA-256: 8aefe094b633be8f1ba0139c8ce1435732efb9118f44bd2589e117f565948f1f
    Size: 20.07 MB

Asianux Server 8 for x86_64
  1. gcc-toolset-9-binutils-2.32-17.el8.x86_64.rpm
    MD5: d9574d2ae3aa56ce58d1c7bb615a4a58
    SHA-256: bf7a1a1604430bb9a7533e2680caedcb85f642a999b7207544708137b2290bbb
    Size: 6.09 MB
  2. gcc-toolset-9-binutils-devel-2.32-17.el8.x86_64.rpm
    MD5: 7d3e6942f74aa2dd4612a2f92b2e6826
    SHA-256: a1d82b19c432113b6078e376fc8c5309b6c33f027d3fc37f44d85b0ee6456ee9
    Size: 973.28 kB
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