In the RE build log, windows 64bit. From install/make/rebase/Makefile as far as I can tell:

Checking for unwanted use of
c:/PROGRA~1/MICROS~2/Bin/Win64/x86/amd64/link /dump /dependents C:/BUILD_~1/jdk7/build/windows-amd64/j2re-image/bin/awt.dll
Usage: grep [-c|A|B|C] -[alqinsvxrdhLowuVEFG] [-U[[c][p][l|b|8|o|a]]]] [-bI] [-e pattern]
[-f patternfile] [--basic-regexp] [--extended-regexp] [--fixed-strings]
[--byte-offset] [--unix-byte-offsets] [--binary] [--text]
[- NUM] [--context[=NUM]|--before-context=NUM|--after-context=NUM]
[--word-regexp] [--revert-match] [--text] [--recursive] [--version]
[pattern] [file ...]
cat: write error on standard output: The pipe is being closed.

This Makefile logic is looking for the use of DLL's that we do not want, indicating a problem with the build elsewhere, but if deployed, the library might not exist. I think in this case it should be looking for the use of the msvcrp.dll file, C++ stuff, that we do not ship and everyone should be linking statically. Not sure why this is empty.

MSVCPNN_DLL is the only thing being looked for, and that should not be an empty value.