Re: make distclean fails for conditional nested package with VPATH build

[Ralf Wildenhues]

Hello Jeff,

* Daily, Jeff A wrote on Mon, Nov 29, 2010 at 11:04:04PM CET:
> I had a user point out that "make distclean" from within their VPATH
> build failed due to a missing, optional nested package.  The nested
> package is called "tascel".  I have in configure.ac:
> 
> AC_ARG_ENABLE([tascel], [omit for brevity], [], [enable_tascel=no])
> AM_CONDITIONAL([ENABLE_TASCEL], [test "x$enable_tascel" = xyes])
> ...
> AS_IF([test "x$enable_tascel" = xyes], [AC_CONFIG_SUBDIRS([tascel])])
> 
> Then in Makefile.am:
> 
> SUBDIRS = armci .
> If ENABLE_TASCEL
> SUBDIRS += tascel
> endif
> 
> I'm sure the Makefile is correct because we want to distributed tascel
> whether or not it's been configured.
> SUBDIRS = armci .
> DIST_SUBDIRS = armci . tascel

Wait, but how can you distribute it if it hasn't been configured?
make dist will surely fail then, no?

> Do I tell this user "don't do that" or did I do something wrong?

Does it work to set
  DIST_SUBDIRS = $(SUBDIRS)

in Makefile.am?  Am I missing something (it's late here ...)

Thanks,
Ralf