This project collects the glibc support/ directory, ready to build
out-of-tree.  Select files from the upstream include/ directory
are included as well.
Tests should be put into the tests/ sub-folder, see the
tests/tst-example.c.  C++ tests must have extension “.cc”.
Note that not all parts of support/ can currently be built in this
way.  These parts are excluded using marker files in
support-excludes/.  Some files have overrides in the support-extras/
directory.  A subset of glibc internal headers (from the include/
directory) are stored in include/.