>>> "Bruce" == Bruce Korb <[EMAIL PROTECTED]> writes:
[...]
Bruce> That proposal being:
Bruce> if BAR
Bruce> MAYBE_BAR = bar
Bruce> fi
Bruce> SUBDIRS = foo $(MAYBE_BAR)
Bruce> The issues are:
Bruce> 1. How do you distribute "bar" when BAR is not defined?
Type `make dist' and this will happen automatically :)
Automake will define `DIST_SUBDIRS = foo bar' for you
automatically because he *knows* that `MAYBE_BAR' *can* contain
`bar'.
`make dist' will recurse into `$(DIST_SUBDIRS)' whatever the
value of `$(SUBDIRS)' is, so it will distribute these files even
if the directory was left out of `$(SUBDIRS)' (i.e., out of the
build).
Try it!
Bruce> "bar" must be listed in either DIST_SUBDIRS or SUBDIRS,
Bruce> always one of them, but not both.
No. See above. DIST_SUBDIRS should contain any directory that
can appear in SUBDIRS.
(Maybe we could add a sanity check in Automake to ensure that
the values of $(SUBDIRS) are contained in those of
$(DIST_SUBDIRS).)
Bruce> 2. bar/Makefile.in must get generated by automake.
Yep.
AC_CONFIG_FILES([bar/Makefile])
This will cause ./configure to create bar/Makefile unconditionally.
This is what we want: since `make dist' must recurse into `bar/' we
should have a Makefile there.
Bruce> Can you tell it to do that without listing it in
Bruce> the AC_CONFIGURE()?
There is no reason to do this here.
Bruce> 3. If you list it there, then it will put stuff in the build
Bruce> directory that will conflict with stuff in the source dir.
Bruce> *THAT* will cause conflicts come "make distcheck" time.
AFAICT that only causes conflicts when you EXTRA_DIST the
directory. You don't need to EXTRA_DIST it.
All you need is, in some place read by Autoconf (your macro?):
AM_CONDITIONAL([BAR], ...)
AC_CONFIG_FILES([bar/Makefile])
In the top-level Makefile.am
if BAR
MAYBE_BAR = bar
fi
SUBDIRS = foo $(MAYBE_BAR)
No evil EXTRA_DIST, no redefinition of DIST_SUBDIRS (since
Automake gets it right in this case), no related AC_SUBST.
--
Alexandre Duret-Lutz
