[boost] [wave]: possible use for makefile dependencies

From: Pavel Vozenilek (pavel_vozenilek_at_[hidden])
Date: 2005-07-26 11:09:19

Hello Hartmut,

Wave executable could have feature for use
in makefiles or makefile generators.

Often the header dependencies are generated
by compiler running in special mode outputting
only dependency information.

For example:
---------------------------------
cc -M -I... -D... foo.c

generates output like:

foo.o : foo.c foo.h stdlib.h

This output is then fed into makefile
to correctly deal with rebuilts.
---------------------------------

Wave could get this functionality too:
invoking wave.exe may be faster or more
convenient than running full compiler
or a makedepend utility.

Most likely output consisting from only
space separated dependent headers
(no *.obj, no foo.c itself) is the best ouput
as the text is futher manipulated.

Other possible options could be:

* ignore system headers
  (some compilers have -MM option for this)
* ignore STL/Boost headers
* ignore the <windows.h> and other MS specific headers
* ignore specified directories or names fitting certain pattern
* ignore read only headers

/Pavel