package: don't ship the sources generated from the parser

Because some of our examples use

    %C%_reccalc_SOURCES = %D%/parse.y

Automake ships parse.y and parse.c, and possibly parse.h when it
"understands" that there is one.  This is not what we want: ship only
parser.y.  Yet we still want to use Automake to compile the sources
from parser.y.  The easiest seems to use

    nodist_%C%_reccalc_SOURCES = %D%/parse.y

together with

    dist_reccalc_DATA = %D%/parse.y %D%/scan.l %D%/Makefile %D%/README.md

which guarantees that parse.y is indeed shipped.

* examples/c/calc/local.mk, examples/c/lexcalc/local.mk,
* examples/c/reccalc/local.mk: Always use nodist_*SOURCES for parsers,
let the dist_*_DATA rules do their job.

examples/c/calc/local.mk

@@ -22,12 +22,12 @@ calcdir = $(docdir)/%D%
 check_PROGRAMS += %D%/calc
 TESTS += %D%/calc.test
 EXTRA_DIST += %D%/calc.test
-%C%_calc_SOURCES = %D%/calc.y
+nodist_%C%_calc_SOURCES = %D%/calc.y
 %D%/calc.c: $(dependencies)
 
 # Don't use gnulib's system headers.
 %C%_calc_CPPFLAGS = -I$(top_srcdir)/%D% -I$(top_builddir)/%D%
 
 dist_calc_DATA = %D%/calc.y %D%/Makefile %D%/README.md
-CLEANFILES += %D%/calc %D%/*.o %D%/parse.c %D%/scan.c
+CLEANFILES += %D%/calc %D%/*.o %D%/scan.c
 CLEANDIRS += %D%/*.dSYM

examples/c/lexcalc/local.mk

@@ -22,12 +22,12 @@ lexcalcdir = $(docdir)/%D%
 check_PROGRAMS += %D%/lexcalc
 TESTS += %D%/lexcalc.test
 EXTRA_DIST += %D%/lexcalc.test
-%C%_lexcalc_SOURCES = %D%/parse.y %D%/parse.h %D%/scan.l
+nodist_%C%_lexcalc_SOURCES = %D%/parse.y %D%/parse.h %D%/scan.l
 %D%/parse.c: $(dependencies)
 
 # Don't use gnulib's system headers.
 %C%_lexcalc_CPPFLAGS = -I$(top_srcdir)/%D% -I$(top_builddir)/%D%
 
 dist_lexcalc_DATA = %D%/parse.y %D%/scan.l %D%/Makefile %D%/README.md
-CLEANFILES += %D%/lexcalc %D%/*.o %D%/parse.c %D%/scan.c
+CLEANFILES += %D%/lexcalc %D%/parse.c %D%/scan.c
 CLEANDIRS += %D%/*.dSYM

examples/c/reccalc/local.mk

@@ -22,8 +22,7 @@ reccalcdir = $(docdir)/%D%
 check_PROGRAMS += %D%/reccalc
 TESTS += %D%/reccalc.test
 EXTRA_DIST += %D%/reccalc.test %D%/scan.l
-%C%_reccalc_SOURCES = %D%/parse.y %D%/parse.h
+nodist_%C%_reccalc_SOURCES = %D%/parse.y %D%/scan.h %D%/scan.c
-nodist_%C%_reccalc_SOURCES = %D%/scan.h %D%/scan.c
 BUILT_SOURCES += $(nodist_%C%_reccalc_SOURCES)
 %D%/parse.c: $(dependencies)
 

examples/local.mk

@@ -14,6 +14,24 @@
 ## You should have received a copy of the GNU General Public License
 ## along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+
+## Because some of our examples use
+##
+##     %C%_reccalc_SOURCES = %D%/parse.y
+##
+## Automake ships parse.y and parse.c, and possibly parse.h when it
+## "understands" that there is one.  This is not what we want: ship only
+## parser.y.  Yet we still want to use Automake to compile the sources
+## from parser.y.  The easiest seems to use
+##
+##     nodist_%C%_reccalc_SOURCES = %D%/parse.y
+##
+## together with
+##
+##     dist_reccalc_DATA = %D%/parse.y %D%/scan.l %D%/Makefile %D%/README.md
+##
+## which guarantees that parse.y is indeed shipped.
+
 dist_noinst_SCRIPTS = %D%/extexi %D%/test
 TEST_LOG_COMPILER = $(top_srcdir)/%D%/test