Re: VPATH usage

[Eli Zaretskii]

On 14 Feb 2001, Paul D. Smith wrote:

> See the docs.  VPATH treats ":" as a path separator, normally.

I don't think `:' is of any significance here, unless the Make port
used is the Cygwin port and it was being run in the ``Unix mode''.
Other DOS/Windows ports take care to use `;' instead of `:' as the
separator in VPATH.

> There is some info in the README.W32 file about this.  You didn't give
> any information about what OS you're running on (although we can infer
> either DOS or Windows), and it's not clear how you've compiled your
> version of GNU make, nor which version you're using, etc.

FWIW, I just tried this Makefile with the DJGPP (a.k.a. MS-DOS) port
of Make 3.79.1, and it indeed doesn't remove C:/temp from VPATH.
However, if I remove the "C:/" part, it isn't removed either.  So the
colon doesn't seem to be the culprit.

The following modification of the original does work, however (VPATH 
comes out empty):

CFLAGS = -g -I. -I$(RELEASE)/source
RELEASE = C:/temp.c

VPATH = $(filter-out -I.,$(filter -I%.c,$(CFLAGS)))