Hi,
On Thu, Feb 14, 2013 at 11:26 AM, Stefano Lattarini
<stefano.lattar...@gmail.com> wrote:
> From: Peter Rosin <p...@lysator.liu.se>
>
> The rationale for this change is that it is annoying to have
> to repeat the directory name when including a Makefile fragment.
> For deep directory structures these repeats can generate a lot
> of bloat. It also hinders reuse and easy directory restructuring
> if all Makefile fragments have to know exactly where they live.
>
> Suggested by Bob Friesenhahn, and later discussed in bug#13524.
>
> In the course of discussion, the following notations were rejected:
> &{reldir}& - to hard to type, {reldir} - interferes with ${reldir},
> {am_reldir} - short form {D} interferes with ${D}, @am_reldir@ - short
> form @D@ interferes with AC_SUBST([D]) as well as invading the
> config.status turf. Other notations were also suggested...
>
> * automake.in (read_am_file): Add third argument specifying the
> relative directory of this Makefile fragment compared to the
> main Makefile. Replace %reldir% and %canon_reldir% in the
> fragment with this relative directory (with slashes etc, or
> canonicalized).
> (read_main_am_file): Adjust.
> * t/preproc-reldir.sh: New test.
> * t/list-of-tests.mk: Augment.
> * doc/automake.texi (Include): Document the new feature.
> NEWS: Add new feature.
>
> Co-authored-by: Stefano Lattarini <stefano.lattar...@gmail.com>
> Signed-off-by: Peter Rosin <p...@lysator.liu.se>
> ---
> NEWS | 12 +++++
> automake.in | 26 ++++++++---
> doc/automake.texi | 20 ++++++++
> t/list-of-tests.mk | 1 +
> t/preproc-reldir.sh | 129
> ++++++++++++++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 182 insertions(+), 6 deletions(-)
> create mode 100755 t/preproc-reldir.sh
>
> diff --git a/NEWS b/NEWS
> index 6dcce72..e27e0cf 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -100,6 +100,18 @@ New in 1.13.2:
> be longer necessary, so we deprecate it with runtime warnings. It will
> likely be removed altogether in Automake 1.14.
>
> +* Relative directory in Makefile fragments:
> +
> + - The special Automake-time substitutions '%reldir%' and '%canon_reldir%'
> + (and their short versions, '%D%' and '%C%' respectively) can now be used
> + in an included Makefile fragment. The former is substituted with the
> + relative directory of the included fragment (compared to the top level
> + including Makefile), and the latter with the canonicalized version of
> + the same relative directory:
> +
> + bin_PROGRAMS += %reldir%/foo
> + %canon_reldir%_foo_SOURCES = {reldir}/bar.c
the rejected '{reldir}' is still used in this example.
Does this substition happens in the whole file, or only in specific
syntactic constructs? What definitily will not work ist something like
this, right?
here = %reldir%
target = %canon_reldir%/foo
bin_PROGRAMS += ${here}/foo
${target}_SOURCES = ${here}/bar.c
Speaking of 'here' wouldn't that also an candidate instead of
'reldir'? and %.% as the shortform of %reldir% does sound:
bin_PROGRAMS += %.%/foo
%canon_here%_foo_SOURCES = %.%/bar.c
Regards,
Bert
