Occasional table build failures with parallel builds (-j)

[jphickey]

Describe the bug
When using the -j option to make, occasionally some table builds may fail.

To Reproduce
Depends on a configuration that uses a lot of table files (> 100). Repeatedly do clean builds followed by make -j<X> install where X is a number greater than 3 or so. Occasionally an error will occur due to a missing object.

Expected behavior
Should succeed

System observed on:
Debian

Additional context
Initial analysis of a failed build seems to suggest it was trying to build the same intermediate table library twice, at the same time. As such either the ranlib or ar actions failed because one of them stepped on the files from the other parallel build.

Reporter Info
Joseph Hickey, Vantage Systems, Inc.