On 8/28/20 9:15 PM, Leif Lindholm wrote:
On Fri, Aug 28, 2020 at 18:56:45 +0200, Laszlo Ersek wrote:
Leif, please comment!
I did propose reverting it. But I asked for Ard's feedback on the
reason for why we had the break in the flags-chain, in case he
remembered (and he was on holiday at the time).
Basically, I'm wondering whether we're better off changing this
behaviour or simply nuking GCC48.
I use GCC48 daily -- it's the system compiler on RHEL7. My laptop runs
RHEL7 -- I value stability above all.
That explains why it's still in then :)
OK, so then cleaning it up would be nice.
Apologies, I had missed this discussion.
The reason the GCC flags are defined the way the are is because the
GCC4x toolchains for x86 were completely disjoint from the UNIXGCC and
other ones that were defined for ARM and IA64.
I agree that some cleanup would be nice, but if we are only going to
reshuffle tools_def variable assignments, I'm not sure it is worth it.
What I would like to see is a bit more structure, and some justification
why we are using all those different options, as i am not convinced they
are still needed even for GCC as far back as v4.8.
Also, even though I understand Laszlo's point about being able to use
the RHEL 7 system compiler, using other toolchains is trivially easy
with EDK2 (this is the whole point), and mainline EDK2 is arguably a
development tree, not a stable production tree for ~5 year old firmware
builds, and so I do think we should get rid of GCC48 even before RHEL7
goes EOL.
I'd even go so far as suggesting that [at some point in the not too
distant future], we rename GCC5 to GCCELFLTO (or something less
obnoxious) and phase out all the version based GCC toolchains entirely.
We might do the same for CLANG38 (the ELF based one), and depending on
whether PE/COFF linker support ever materializes for ARM, have a single
Clang+PE based toolchain as well.
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