calc++: don't rely on Automake to compile a C++ parser.
Basically, revert commit 609b3d8096,
Automake 1.11.3 is not safe enough for C++ parser.
* examples/calc++/calc++-parser.hh: Remove.
* examples/calc++/local.mk (examples/calc++/calc++-parser.stamp):
New.
examples: factor the extractions into a single step
extexi had to be run in the extraction directory. Now, it can be
given the files with expected output directory. This allows to
use $(*_extracted) variables (before we had to list again their
members, but limited to their base names). In turn, this also
allows fusing the extraction recipes into a single one.
Also, it is currently too hard (or requires too much duplication,
since Make wants all the occurrences of the files to be prefixed with
$(srcdir)/, which is something Automake cannot support for *_SOURCES)
to work in the source tree. So extract, and compile scanners and parsers
in the build tree.
* examples/extexi (basename): New.
(BEGIN): Now "file_wanted" maps base name to extracted file name.
* examples/calc++/local.mk, examples/mfcalc/local.mk,
* examples/rpcalc/local.mk: Fuse extraction rules into...
* examples/local.mk: Here.
(extract, extracted): New.
Rely on $(YACC) being the bison being built, and let Automake do the
rest. It turned out to be much more difficult than anticipated, for
various reasons, including some bad behavior from Automake 1.11.2
which (i) generates calc++-parser.h instead of calc++-parser.hh, and
(ii) leaves an #include "y.tab.h" in the generated parser instead
of #include "calc++-parser.h".
The authors of Automake appear to be aware of the problem,
http://lists.gnu.org/archive/html/automake/2011-05/msg00008.html
so a simple work around will suffice for the time being.
* examples/calc++/y.tab.h, examples/calc++/calc++-parser.hh: New.
To work around Automake 1.11.2 issues.
* examples/calc++/local.mk: Remove all the rules for compilation
with bison, leave them to Automake.
So provide it with "calc++-parse.yy" as a source file.
(calc_sources_generated, calc_sources_extracted): Rename as.
(calc_generated, calc_extracted): these.
(calc_sources): New.
Fix them.
The directory was still using a local Makefile.am because it provides
"scoped" Make variables: these examples are not meant to use the same
CPPFLAGS etc. If we were to use the same -I set, we'd pick up
gnulib's stdio.h for instance, which we do not want for these simple
examples.
Yet, as a result, the dependencies are less accurate, there is code
duplication, etc. This is especially perceptible when trying to
extract more examples from the documentation, as will be done in
forthcoming changes.
In order to make the tuning of CPPFLAGS easier, discard the predefined
-I from Automake.
* examples/calc++/Makefile.am: Rename as...
* examples/calc++/local.mk: this.
Adjust the paths which are now rooted in top_srcdir/top_builddir.
Handle BISON_CXX_WORKS here, instead of the too crude previous
approach that completely discarded the whole directory.
($(BISON)): Remove now useless bouncing recipe.
(calc___CPPFLAGS): New.
Stay away from -Ilib.
* Makefile.am, configure.ac, examples/local.mk,
* examples/calc++/test: Adjust.
* configure.ac: Pass nostdinc to Automake.
* src/local.mk, lib/local.mk (AM_CPPFLAGS): Move to...
* Makefile.am: here.
* src/local.mk, examples/calc++/Makefile.am (BISON, BISON_IN): Factor
to...
* Makefile.am: here.
* tests/local.mk: Use it.
* bootstrap (insert_sorted_if_absent): Replace all uses with...
(insert_vc_ignore): ... this new function, which prepends `/' to all
.gitignore entries before passing them to insert_sorted_if_absent.
* bootstrap.conf (vc_ignore): Set to '.cvsignore .gitignore' so that
.cvsignore files are maintained even though Bison developers run
bootstrap while using Git.
* .cvsignore (*.patch *.log log patches applied): Remove, apparently
unneeded by Bison.
(gnulib): Add.
* .gitignore (/*.patch *.log log patches applied): Remove, broken and
unneeded. Reported by Eric Blake.
* lib/.gitignore (/*~): Add.
* po/.cvsignore, runtime-po/.cvsignore: Sync with .gitignore.
* examples/calc++/.gitignore (/calc++.exe): Add. Reported by Eric
Blake.
* src/.gitignore (/bison.exe): Add. Reported by Eric Blake.
