File: autoconf.info,  Node: Variables listed in VPATH,  Next: VPATH and Double-colon,  Up: VPATH and Make

12.18.1 Variables listed in ‘VPATH’
-----------------------------------

Do not set ‘VPATH’ to the value of another variable, for example ‘VPATH
= $(srcdir)’, because some ancient versions of ‘make’ do not do variable
substitutions on the value of ‘VPATH’.  For example, use this

     srcdir = @srcdir@
     VPATH = @srcdir@

rather than ‘VPATH = $(srcdir)’.  Note that with GNU Automake, there is
no need to set this yourself.