On Windows, the build prints these annoying messages:

cl : Command line warning D4002 : ignoring unknown option '-NOLOGO'

Here are 3 occurrences in the makefiles to fix:

./common/Defs-windows.gmk:537: # -NOLOGO Don't print out startup message
./common/Defs-windows.gmk:539: CFLAGS_COMMON += -Zi -NOLOGO
./common/Defs-windows.gmk:551: BASELFLAGS = -NOLOGO /opt:REF

Running cl /help /nologo (!) shows the proper flag:

 $ cl /help /nologo | grep -i nologo
/nologo suppress copyright message /Yc[file] create .PCH file