No support for VPATH

In 3.0x

VPATH was used to search for the source files in a given list of directories.
Consequences

- no

gmake check_vpath anymore
- no
VPATH search during the Make run. Make looks for the dependencies of files in VPATH , checks the PWE and the SSWE. This is not necessary since source files are linked or copied on Windows.
- all
VPATH related flags and macros e.g.,
VPATH, VINCLUDE, INHIBIT_LOCAL_INCLUDES , etc.,
are removed from the SNiFF+ Makefiles.
Reasons why VPATH is not supported anymore
The VPATH macro is not used in the new Make Support because of its limitations listed below.

- not all compilers support the

INHIBIT_LOCAL_INCLUDES flag
- inconsistencies because dependencies may be incorrectly resolved
- builds take longer
Dummy rule for check_vpath

- Since all customers who use 3.0x or an earlier version have the default make command

gmake check_vpath;gmake
stored either in the Project Attributes or in the Platform definitions, each time Make is called the following error message will appear:
check_vpath: rule not found
- We have added a "dummy check_vpath rule" to avoid that error. Now,
check_vpath not required anymore
is printed out (the message is printed out only for the project root directory).