Re: lang/gcc10 does not compile with Darwin 20.5.0 + Xcode 11.4

[Jason Bacon <outpaddling%yahoo.com@localhost>]

On 5/28/21 9:17 AM, Jason Bacon wrote:
> On 5/27/21 5:32 PM, Brook Milligan wrote:
> > I have two different Macs, one of which compiles gcc10 and one of 
> > which does not. �Both are using current pkgsrc.
> >
> > The successful one is:
> >
> > MacOS 11.1
> > Darwin�20.2.0�
> > Xcode 12.4
> > SDK 11.1
> >
> > The unsuccessful one is:
> >
> > MacOS 11.4
> > Darwin�20.5.0
> > Xcode�12.5
> > SDK 11.3
> >
> > The latter also will not compile gcc8 or gcc9. �Note that I 
> > added�OSX_SDK_MAP.11.4=11.3 to mk/platform/Darwin.mk because of the 
> > version slew.
> >
> > All of these gcc package fail when the stage 2 and stage 3 files are 
> > compared; otherwise the builds seem to progress fine.
> >
> > I am not seeing any relevant bulk builds to indicate whether this is a 
> > known problem.
> >
> > I would greatly appreciate any suggestions on how to make this work.
> >
> > Thank you very much.
> >
> > Cheers,
> > Brook
> Coincidentally, I was just working on this issue, which also affects 
> bootstrap and other packages that require cwrappers.
>
> The SDK version has fallen behind the OS version (again).� My existing 
> trees and new bootstraps started failing after the last routine MacOS 
> updates.� The solution appears to be mapping 11.4 to 11.3 in Darwin.mk:
>
> #
> # Apple do not always keep the SDK version in step with the OS 
> version.� When
> # that happens add a mapping below, but only within the same OS release 
> major.
> #
> OSX_SDK_MAP.11.2=������ 11.1
> +OSX_SDK_MAP.11.4=������ 11.3
> #
> OSX_SDK_PATH!=� /usr/bin/xcrun \
> ������������������� --sdk 
> macosx${OSX_SDK_MAP.${OSX_VERSION}:U${OSX_VERSION}} \
> ������������������� 
> --show-sdk-path 2>/dev/null || echo /nonexistent
>
> I just completed a successful bootstrap with this patch.� Any concerns 
> about committing it?

Let's try that again without Thunderbird's HTML formatting...

#
# Apple do not always keep the SDK version in step with the OS version. 
 When
# that happens add a mapping below, but only within the same OS release 
major.
#
OSX_SDK_MAP.11.2=       11.1
+OSX_SDK_MAP.11.4=       11.3
#
OSX_SDK_PATH!=  /usr/bin/xcrun \
                    --sdk 
macosx${OSX_SDK_MAP.${OSX_VERSION}:U${OSX_VERSION}} \
                    --show-sdk-path 2>/dev/null || echo /nonexistent

This is only a quick fix that won't save us from the next time 
OSX_VERSION is bumped without upgrading the SDK.  It also prevents us 
from using SDK 11.4 if apple releases it at a later date.

I wonder if it would be better to just check for the existence of

/SDK-path/MacOSX${OSX_VERSION}.sdk

and fall back on a previous version if it doesn't exist.