Speeding up development of test-container testcases

[Florian Weimer]

* Joseph Simmons-Talbott via Libc-help:

> I'm working on developing some test-container testcases and am
> currently using the workflow where I run configure and then make to
> build glibc.  I am having to run a full 'make check' in order to be
> able to run a test-container testcase individually with 'make test
> t=...'.  I've attempted to determine the part of 'make check' that I
> need to build before I can successfully just run a single testcase
> after a clean build of glibc but have been unsuccessful so far.  Any
> tips are greatly appreciated.

Looking at my shell history, I believe these commands can be used to
recreate the testroot with the current glibc build:

  rm `pwd`/testroot.pristine/install.stamp
  make -j`nproc` `pwd`/testroot.pristine/install.stamp

Thanks,
Florian