Author: Burt Silverman &lt;burtms@gmail.com&gt;<br />Date:&nbsp;&nbsp; Sat Sep 7 16:33:53 2019 -0400<br /><br />&nbsp;&nbsp;&nbsp; Improve robustness for multiple build environments<br /><br />&nbsp;&nbsp;&nbsp; When building BaseTools, GNUmakefile builds create directory<br />&nbsp;&nbsp;&nbsp; BaseTools/Source/C/libs/. On the other hand, Makefile builds use libs<br />&nbsp;&nbsp;&nbsp; as an nmake pseudo target, so it either must NOT exist as a file or<br />&nbsp;&nbsp;&nbsp; directory, OR it must phony dependency like .PHONY. The latter<br />&nbsp;&nbsp;&nbsp; solution conflicts with NmakeSubdirs.py. Therefore, I make it go away<br />&nbsp;&nbsp;&nbsp; in the cleanall target. I could also add it to the clean target, but<br />&nbsp;&nbsp;&nbsp; it strikes me that cleanall should be more forceful.<br /><br />&nbsp;&nbsp;&nbsp; Signed-off-by: Burt Silverman &lt;burtms@gmail.com&gt;