Master Is Broken with Failed 'make distcheck'

[gerickson]

Problem

The top of tree master branch is broken due to a failed make distcheck:

Making all in system
Making all in tests
make[5]: Nothing to be done for 'all'.
  CXX      ../../src/system/libSystemLayer_a-SystemClock.o
  CXX      ../../src/system/libSystemLayer_a-SystemError.o
  CXX      ../../src/system/libSystemLayer_a-SystemLayer.o
  CXX      ../../src/system/libSystemLayer_a-SystemMutex.o
  CXX      ../../src/system/libSystemLayer_a-SystemObject.o
  CXX      ../../src/system/libSystemLayer_a-SystemTimer.o
  CXX      ../../src/system/libSystemLayer_a-SystemPacketBuffer.o
  CXX      ../../src/system/libSystemLayer_a-SystemStats.o
  CXX      ../../src/system/libSystemLayer_a-SystemFaultInjection.o
  AR       libSystemLayer.a
ar: `u' modifier ignored since `D' is the default (see `U')
make[4]: Nothing to be done for 'all-am'.
Making all in tests
make[4]: Nothing to be done for 'all-am'.
make[3]: Nothing to be done for 'all-am'.
  DISTCHECK    x86_64-unknown-linux-gnu
make -j2 -C build/x86_64-unknown-linux-gnu --no-print-directory distcheck
  CHECK         .local-version
make --no-print-directory dist-gzip am__post_remove_distdir='@:'
make[2]: *** No rule to make target 'BUILDING.md', needed by 'distdir'.  Stop.
make[1]: *** [dist] Error 2
Makefile:902: recipe for target 'dist' failed
make: *** [distcheck-x86_64-unknown-linux-gnu] Error 2
Makefile-Standalone:423: recipe for target 'distcheck-x86_64-unknown-linux-gnu' failed
##[error]Process completed with exit code 2.

Proposed Solution

Find the offending makefile(s) and ensure BUILDING.md is appropriately captured as a project file.

[woody-apple]

Confirm this happens in VSCode environment too

[woody-apple]

I broke this moving the BUILDING.md file