PAC_PROG_MAKE_VPATH
Check whether make supports source-code paths.
Synopsis
PAC_PROG_MAKE_VPATH
Output Effect
Sets the variable VPATH to either
VPATH = .:${srcdir}
or
.PATH: . ${srcdir}
Notes
The test checks that the path works with implicit targets (some makes
support only explicit targets with VPATH or PATH).
NEED TO DO: Check that $< works on explicit targets.
See Also
PAC_PROG_MAKE