Re: More problems with `make -n' in automake-generated rules.

[Ralf Wildenhues]

* Ralf Wildenhues wrote on Mon, Nov 01, 2010 at 10:18:55PM CET:
>     Fix and document rules to not touch the tree with `make -n'.
>     
>     * doc/automake.texi (Multiple Outputs): Document the problem of
>     modifications during dry-run execution, propose solution.
>     * NEWS: Update.
>     * automake.in (lang_vala_finish_target): Split recipe so the
>     stamp file is not removed with GNU `make -n'.
>     (lang_yacc_target_hook): Separate removal of parser output file
>     and header remaking.
>     * lib/am/lisp.am ($(am__ELCFILES)): Determine whether -n was
>     passed to make, take care not to remove any files in that case.
>     * lib/am/remake-hdr.am (%CONFIG_H%): Separate removal of
>     %STAMP% file from induced remaking of config header.
>     * tests/autohdrdry.test, tests/lispdry.test, tests/yaccdry.test:
>     New tests.
>     * tests/Makefile.am (TESTS): Update.

This test needed a fixup, as yaccdry requires nonempty $YACC.
Found by the NixOS Hydra, kudos to them!
http://hydra.nixos.org/build/741504

The test could probably also be written without requiring bison
(make -t or so), but I'd prefer to have the setup be realistic,
that's more important than having coverage on every system out there.

Pushed to maint.

Thanks,
Ralf

    Fix yaccdry.test failure: require bison.
    
    * tests/yaccdry.test: Require bison.
    Found by NixOS Hydra.

diff --git a/tests/yaccdry.test b/tests/yaccdry.test
index d11d3fe..d2e7632 100755
--- a/tests/yaccdry.test
+++ b/tests/yaccdry.test
@@ -16,6 +16,7 @@
 
 # Removal recovery rules for headers should not remove files with `make -n'.
 
+required=bison
 . ./defs || Exit 1
 
 set -e