Use AM_SILENT_RULES to pare down build output, ignore auto-generated files

* .gitignore: Ignore extra gnulib headers.
* am/snarf: Silent SNARF command
* am/guilec: Silent GUILEC command
* configure.ac: Use AM_SILENT_RULES when available
* guile-readline/Makefile.am:
* libguile/Makefile.am:
* srfi/Makefile.am:
* test-suite/standalone/Makefile.am: Silence snarf output

libguile/Makefile.am

@@ -19,6 +19,8 @@
 ##   write to the Free Software Foundation, Inc., 51 Franklin Street,
 ##   Fifth Floor, Boston, MA 02110-1301 USA
 
+include $(top_srcdir)/am/snarf
+
 AUTOMAKE_OPTIONS = gnu
 
 ## Prevent automake from adding extra -I options
@@ -53,6 +55,7 @@ gen_scmconfig_SOURCES = gen-scmconfig.c
 ## Override default rule; this should be compiled for BUILD host.
 ## For some reason, OBJEXT does not include the dot
 gen-scmconfig.$(OBJEXT): gen-scmconfig.c
+	$(AM_V_GEN) \
 	if [ "$(cross_compiling)" = "yes" ]; then \
 		$(CC_FOR_BUILD) $(DEFS) $(DEFAULT_INCLUDES) $(AM_CPPFLAGS) -c -o $@ $<; \
 	else \
@@ -61,7 +64,8 @@ gen-scmconfig.$(OBJEXT): gen-scmconfig.c
 
 ## Override default rule; this should run on BUILD host.
 gen-scmconfig$(EXEEXT): $(gen_scmconfig_OBJECTS) $(gen_scmconfig_DEPENDENCIES) 
-	@rm -f gen-scmconfig$(EXEEXT)
+	$(AM_V_GEN) \
+	rm -f gen-scmconfig$(EXEEXT); \
 	if [ "$(cross_compiling)" = "yes" ]; then \
 		$(CCLD_FOR_BUILD) -o $@ $(gen_scmconfig_OBJECTS); \
 	else \
@@ -69,18 +73,20 @@ gen-scmconfig$(EXEEXT): $(gen_scmconfig_OBJECTS) $(gen_scmconfig_DEPENDENCIES)
 	fi
 
 scmconfig.h: ${top_builddir}/config.h gen-scmconfig$(EXEEXT)
-	rm -f scmconfig.h.tmp
-	cat $(srcdir)/scmconfig.h.top > scmconfig.h.tmp
-	./gen-scmconfig$(EXEEXT) >> scmconfig.h.tmp
-	chmod 444 scmconfig.h.tmp
-	rm -f scmconfig.h
-	mv scmconfig.h.tmp scmconfig.h
+	$(AM_V_GEN)(rm -f scmconfig.h.tmp; \
+	cat $(srcdir)/scmconfig.h.top > scmconfig.h.tmp; \
+	./gen-scmconfig$(EXEEXT) >> scmconfig.h.tmp; \
+	chmod 444 scmconfig.h.tmp; \
+	rm -f scmconfig.h; \
+	mv scmconfig.h.tmp scmconfig.h)
+
 
 guile_filter_doc_snarfage_SOURCES = c-tokenize.c
 
 ## Override default rule; this should be compiled for BUILD host.
 ## For some reason, OBJEXT does not include the dot
 c-tokenize.$(OBJEXT): c-tokenize.c
+	$(AM_V_GEN) \
 	if [ "$(cross_compiling)" = "yes" ]; then \
 		$(CC_FOR_BUILD) $(DEFS) $(AM_CPPFLAGS) -c -o $@ $<; \
 	else \
@@ -89,7 +95,8 @@ c-tokenize.$(OBJEXT): c-tokenize.c
 
 ## Override default rule; this should run on BUILD host.
 guile_filter_doc_snarfage$(EXEEXT): $(guile_filter_doc_snarfage_OBJECTS) $(guile_filter_doc_snarfage_DEPENDENCIES) 
-	@rm -f guile_filter_doc_snarfage$(EXEEXT)
+	$(AM_V_GEN) \
+	rm -f guile_filter_doc_snarfage$(EXEEXT); \
 	if [ "$(cross_compiling)" = "yes" ]; then \
 		$(CCLD_FOR_BUILD) -o $@ $(guile_filter_doc_snarfage_OBJECTS); \
 	else \
@@ -406,7 +413,7 @@ EXTRA_DOT_DOC_FILES = @EXTRA_DOT_DOC_FILES@
 DOT_I_FILES = vm-i-system.i vm-i-scheme.i vm-i-loader.i
 
 .c.i:
-	$(GREP) '^VM_DEFINE' $< > $@
+	$(AM_V_GEN)$(GREP) '^VM_DEFINE' $< > $@
 
 BUILT_SOURCES = cpp_err_symbols.c cpp_sig_symbols.c libpath.h \
     version.h scmconfig.h \
@@ -601,16 +608,14 @@ EXTRA_DIST = ChangeLog-scm ChangeLog-threads		\
 ## usual @...@, so autoconf doesn't go and substitute the values
 ## directly into the left-hand sides of the sed substitutions.  *sigh*
 version.h: version.h.in $(top_builddir)/config.status
-	sed < $(srcdir)/version.h.in > $@.tmp \
+	$(AM_V_GEN)sed < $(srcdir)/version.h.in > $@.tmp \
 	  -e s:@-GUILE_MAJOR_VERSION-@:${GUILE_MAJOR_VERSION}: \
 	  -e s:@-GUILE_MINOR_VERSION-@:${GUILE_MINOR_VERSION}: \
 	  -e s:@-GUILE_MICRO_VERSION-@:${GUILE_MICRO_VERSION}: \
-	  -e s:@-GUILE_EFFECTIVE_VERSION-@:${GUILE_EFFECTIVE_VERSION}:
-	mv $@.tmp $@
+	  -e s:@-GUILE_EFFECTIVE_VERSION-@:${GUILE_EFFECTIVE_VERSION}: && mv $@.tmp $@
 
 ## FIXME: Consider using timestamp file, to avoid unnecessary rebuilds.
 libpath.h: $(srcdir)/Makefile.in  $(top_builddir)/config.status
-	@echo "Generating libpath.h..."
 	@rm -f libpath.tmp
 	@echo '/* generated by Makefile */' > libpath.tmp
 	@echo '#define SCM_PKGDATA_DIR "$(pkgdatadir)"' >> libpath.tmp
@@ -649,18 +654,21 @@ libpath.h: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 	@echo '	{ "CFLAGS",	   "@GUILE_CFLAGS@" }, \' >> libpath.tmp
 	@echo '	{ "buildstamp",    "'"`date`"'" }, \' >> libpath.tmp
 	@echo '}' >> libpath.tmp
-	@mv libpath.tmp libpath.h
+	$(AM_V_GEN)mv libpath.tmp libpath.h
 
 
 snarfcppopts = $(DEFS) $(AM_CPPFLAGS) $(CPPFLAGS) $(CFLAGS)
 
 SUFFIXES = .x .doc
+
+AM_V_FILTER = $(AM_V_FILTER_$(V))
+AM_V_FILTER_ = $(AM_V_FILTER_$(AM_DEFAULT_VERBOSITY))
+AM_V_FILTER_0 = @echo "  FILTER" $@;
+
 .c.x:
-	./guile-snarf -o $@ $< $(snarfcppopts)
+	$(AM_V_SNARF)$(GUILE_SNARF) -o $@ $< $(snarfcppopts)
 .c.doc:
-	-$(AWK) -f ./guile-func-name-check $<
-	(./guile-snarf-docs $(snarfcppopts) $< | \
-	./guile_filter_doc_snarfage$(EXEEXT) --filter-snarfage) > $@ || { rm $@; false; }
+	-$(AM_V_FILTER)$(AWK) -f ./guile-func-name-check $< && (./guile-snarf-docs $(snarfcppopts) $< | ./guile_filter_doc_snarfage$(EXEEXT) --filter-snarfage) > $@ || { rm $@; false; }
 
 $(DOT_X_FILES) $(EXTRA_DOT_X_FILES): scmconfig.h snarf.h guile-snarf.in
 
@@ -678,7 +686,7 @@ guile.texi: $(alldotdocfiles) guile$(EXEEXT)
 	$(dotdoc2texi) --manual > $@ || { rm $@; false; }
 
 guile-procedures.texi: $(alldotdocfiles) guile$(EXEEXT)
-	$(dotdoc2texi)          > $@ || { rm $@; false; }
+	$(AM_V_GEN)$(dotdoc2texi)          > $@ || { rm $@; false; }
 
 if HAVE_MAKEINFO