gnu make and the EPICS Makefile system
don't work well with paths containing
blanks.
The reason is that it doesn't seem
possible to get around blanks being
recognized as word separators by the
string manipulating gmake functions
a la $(addprefix) etc.
I tried to work around this as much
as possible and it seems that most
things work if blanks are escaped
with backslash-characters, e.g.,

MATLABDIR=C:\Program\ Files\MATLAB\2010a

HOWEVER: the perl script that computes
dependencies ('.d' files) definitely
cannot deal with blanks and removes these
escape characters. Hence, the .d files
are unusable by 'make' and lead to errors.
To work around this either
 - disable dependency tracking in EPICS base
OR
 - always 'make clean' then 'make'

T.S. 1/2012