bug#7648: [PATCH] {yacc-work} yacc: extension of headers modelled after extension of sources

[Stefano Lattarini]

Reference:
 <http://lists.gnu.org/archive/html/automake-patches/2011-01/msg00306.html>

On Friday 28 January 2011, Stefano Lattarini wrote:
> Hello automakers.  The reasons of this patch should be
> explained in details in the ChangeLog entry (see below).
> 
> OK for the 'yacc-work' branch?
> 
> Regards,
>    Stefano
> 
> -*-*-
> 
> With this change, if '-d' is in *YFLAGS, a yacc input file named
> foo.y++ will cause a foo.h++ header to be generated, instead of a
> foo.h header.  Similarly for foo.ypp, foo.yxx and foo.yy.
> This way, the name of the files generated by an automake-created
> `ylwrap' invocation should be consistent with those generated by
> a `bison -o' call.
> 
> Related to automake bug#7648 and PR automake/491.
> 
> * lib/am/yacc.am (am__yacc_c2h): New internal variable.
> (?GENERIC?%EXT%%DERIVED-EXT%, ?!GENERIC?%OBJ%): Get the name of
> the header dynamically at make runtime, so that its extension is
> modelled after the extension of the source.
> * automake.in (lang_yacc_target_hook): Adjust the calculation of
> `$header' accordingly.
> * tests/yacc-cxx.test: New test.
> * tests/yacc-d-cxx.test: Likewise.
> * tests/yacc-weirdnames.test: Likewise.
> * tests/yacc-basic.test: Update comments.
> * tests/yacc-d-basic.test: Likewise.
> * tests/yaccpp.test: Updated and extended.
> * tests/Makefile.am (TESTS): Update.
> 
This patch has been applied in the meantime, but it lacked NEWS and
documentation updates.  I will post them soonish in two different
patches.

Sorry for the noise,
  Stefano