bug#22331: nodist_nobase_ variable does not treat nobase_ as a special prefix

[Simon McVittie]

I'm using Automake 1.15 (Debian's automake package version 1:1.15-3) and
Autoconf 2.69 (autoconf 2.69-9).

If I generate a header file at runtime, and I want it installed in a
subdirectory, it makes sense to use both the nobase_ and nodist_
prefixes. However, these only work as I'd expect if nobase_ is first.

Complete project attached, of which the important part is:

nobase_pkginclude_HEADERS = foo/bar.h
nobase_nodist_pkginclude_HEADERS = foo/nb-nd.h
nodist_nobase_pkginclude_HEADERS = foo/nd-nb.h

Steps to reproduce:

autoreconf -fi && ./configure && make
make install DESTDIR=$(pwd)/DESTDIR
find DESTDIR -type f

Expected result:

DESTDIR/usr/local/include/example/foo/bar.h
DESTDIR/usr/local/include/example/foo/nb-nd.h
DESTDIR/usr/local/include/example/foo/nd-nb.h

Alternative result which would also be OK:

* Documentation mentions that nobase_ must come before nodist_ if both
  are used
* A warning from automake tells me I've probably made a mistake

Actual result:

* nd-nb.h is missing
* No warning

Looking at the generated Makefile, nobase_pkginclude_HEADERS and
nobase_nodist_pkginclude_HEADERS are to be installed to $(pkgincludedir)
as I would expect, but nodist_nobase_pkginclude_HEADERS are to be
installed to $(nobase_pkgincludedir), which is not defined, so they are
skipped.

-- 
Simon McVittie
Collabora Ltd. <http://www.collabora.com/>

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