build output/logging buffering?

[David Holmes]

I see that a build will create a build.log by default. I also see I can 
set VERBOSE= to get back to the older more verbose style of output (eg 
full compilation commands etc).

But it seems that due to the logging there is some buffering taking 
place that prevents me from seeing the most recent build output while it 
is running. I just had a problem where due to a mistyped variable I did 
a "cd " and then starting trawling my entire home directory, but I 
couldn't see this in the build output, ie no "cd " was visible, 
presumably because the output was being buffered.

What I did see, which gave me the hint were a bunch of warnings that 
presumably went to stderr, not stdout and do did not get buffered.

David