Hi all,

We noticed that a recent change 
https://gem5-review.googlesource.com/c/public/gem5/+/35856 broke the Build on 
GCC 5.4:

build/ARM/dev/reg_bank.test.cc:29:32: error: unknown option after '#pragma GCC 
diagnostic' kind [-Werror=pragmas]
#pragma GCC diagnostic ignored "-Wdeprecated-copy"
                                ^
cc1plus: all warnings being treated as errors

The option was apparently only added to GCC 9: 
https://gcc.gnu.org/gcc-9/changes.html

I then searched a bit and found out about Compiler-Checks under 
http://jenkins.gem5.org/ which is awesome, but unfortunately hasn't passed in a 
month and not run in 12 days.

So I wanted to check what's the status of that setup? That is a very good way 
to prevent this kind of build break.

Even more awesome would be if we could add a build with the minimum supported 
GCC version to precommits.

Let me know if there's anything I can do to help to get that up and running.
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