Bogus Error

A small project shows the error for me, here, in BogusError.zip

It has a README.txt, which explains everything- it's also below.

This is the issue in https://developer.apple.com/forums/thread/657583

And also: discussions.apple.com/thread/251689624

And also: https://stackoverflow.com/questions/63405979/in-xcode-clang-11-i-get-no-template-named-initializer-list-in-namespace-std

Why is Xcode producing the error:
No template named 'initializer_list' in namespace 'std'?

Download and unzip this file: BogusError.zip
and it'll create the BogusError folder.

cd into it and run the shell script: ./mk a

It basically does:
      cd BogusError/metrics/test
      cmake .. -G
      open bogus-error.xcodeproj

The latter starts Xcode.

I had an old homebrew cmake, but when the problem began I upgraded it to 3.18.1
I'm running macOS Mojave, 10.14.6, which is the latest macOS NASA allows.
I'm running Xcode 11.3.1 (11C504)

Once Xcode is running, if I navigate to
      bogus-error
          bogus
              Source Files
                  Bogus.cpp

The error is on line 16:
      No template named 'initializer_list' in namespace 'std'
If you don't see the error, wait a bit or click on the build button or the menu item Product > Build

On line 9 is the: #include "Bogus.h"
Right-click on that and choose Jump to Definition and up comes Bogus.h
It has:
      #include
      #include
and on line 21 it declares method 'set' using: std::intializer_list
This line 21 also shows the error.

What can I do to get this working in Xcode 11.3???

====

For a coworker who's running Xcode 10.3, this process works...
But in his file: project.pbxproj.aok
are buildSettings including:
    OTHER_CPLUSPLUSFLAGS = "-std=c++11 -pthread -fstrict-aliasing -Wall -Wcast-qual -Wextra -Wformat -Wpedantic -Wswitch-default -Wno-unknown-pragmas -DNDEBUG ";

This is missing from mine. If I add it to mine, it doesn't make a difference.

==== Note that if I make a new project in Xcode and use these two Bogus files, it works, no error.

In my project, if I click in the Project Navigator on the top-level bogus error project,
at the top of the middle panel I see: Resource Tags, Build Settings, Build Phases, Build Rules

But in the new project that Xcode creates are two additional tabs: General Signing & Capabilities
Perhaps this is a clue?

================

Note that it's difficult to get a different version of Xcode, other than the version that NASA puts on the machine. I THINK that's 11.3.1, but don't recall if I found a way to upgrade.
I also have 10.3 Xcode, in /Applications/Xcode10.3
but when I start it, it puts up an alert:
      Install additional required components? [Quit] [Install]

If I click on Install, it tries but gives
      An unknown error occurred. See the install log for more details.

If I click to open the install log, I get errors like:
2020-08-18 13:04:56-07 ARSLA18070315 Xcode[29349]: Package: PKLeopardPackage Failed to verify with error: Error Domain=PKInstallErrorDomain Code=102 "The package “MobileDeviceDevelopment.pkg” is untrusted." UserInfo={NSLocalizedDescription=The package “MobileDeviceDevelopment.pkg” is untrusted., NSURL=MobileDeviceDevelopment.pkg -- file:///Applications/Xcode10.3.app/Contents/Resources/Packages/, PKInstallPackageIdentifier=com.apple.pkg.MobileDeviceDevelopment, NSUnderlyingError=0x7fb6afbbb940 {Error Domain=NSOSStatusErrorDomain Code=-2147409654 "CSSMERR_TP_CERT_EXPIRED" UserInfo={SecTrustResult=5, PKTrustLevel=PKTrustLevelExpiredCertificate, NSLocalizedFailureReason=CSSMERR_TP_CERT_EXPIRED}}}