Xcode error with cmake build of grpc

[Ryan Schmidt]

On Jan 17, 2021, at 10:49, Ken Cunningham wrote:

>> This kind of problem is the reason why I keep our Buildbot machines on a version of Xcode and command line tools that contains the SDK version matching the OS version.
> The downside is all the newer software that should but won’t build on that system, and the fact that almost 100% of users are using the newer Xcode on their systems, so the buildbot doesn’t match MacPort’s users. Reproducible builds, all that.
> 
> I obviously know you quite sticky on this point, but…
> 
> 
> You *could* install the newer Xcode and the older system-matching SDK and get the best of all worlds.

Yes but that configuration would match virtually no user systems.

For those situations where we need a specific SDK that Xcode or CLT doesn't provide, I would rather use my MacOSX.sdk port that has not yet been committed, rather than put nonstandard SDKs on the build machine manually.