stop building l10n if strings are unchanged

The buildsystem tried to build l10n for test applications which never
produced the output it expected causing it to try building it all the
time.

buildlib/copy.mak

@@ -21,7 +21,7 @@ veryclean: veryclean/$(LOCAL)
 
 MKDIRS += $(dir $($(LOCAL)-LIST))
 
-$($(LOCAL)-LIST) : $(TO)/% : % dirs
+$($(LOCAL)-LIST) : $(TO)/% : %
 	echo Installing $< to $(@D)
 	cp $< $(@D)
 

buildlib/podomain.mak

@@ -4,6 +4,8 @@
 # declared domain of the make file. It also arranges to set the DOMAIN 
 # CPPFLAG for the compilation.
 
+ifneq ($(APT_DOMAIN),none)
+
 MY_DOMAIN := $(PACKAGE)
 ifdef APT_DOMAIN
 $($(LOCAL)-OBJS): CPPFLAGS := $(CPPFLAGS) -DAPT_DOMAIN='"$(APT_DOMAIN)"'
@@ -13,10 +15,13 @@ endif
 MKDIRS += $(PO_DOMAINS)/$(MY_DOMAIN)
 $(PO_DOMAINS)/$(MY_DOMAIN)/$(LOCAL).$(TYPE)list: SRC := $(addprefix $(SUBDIR)/,$(SOURCE))
 $(PO_DOMAINS)/$(MY_DOMAIN)/$(LOCAL).$(TYPE)list: makefile dirs
-	(echo $(SRC) | xargs -n1 echo) > $@
+	(echo $(SRC) | xargs -n1 echo) > $@.tmp
+	cmp --silent $@.tmp $@ || mv $@.tmp $@
 startup binary program clean update-po: $(PO_DOMAINS)/$(MY_DOMAIN)/$(LOCAL).$(TYPE)list
 
 veryclean: veryclean/$(LOCAL)
 veryclean/po/$(LOCAL): LIST := $(PO_DOMAINS)/$(MY_DOMAIN)/$(LOCAL).$(TYPE)list
 veryclean/po/$(LOCAL):
 	rm -f $(LIST)
+
+endif

doc/makefile

@@ -36,7 +36,7 @@ $(DOCDIRLIST) :: %/makefile : lang.makefile
 	test -d $(dir $@) || mkdir $(dir $@)
 	sed "s#@@LANG@@#$(subst /,,$(dir $@))#" $< > $@
 
-debiandoc/subdirs manpages/subdirs clean/subdirs veryclean/subdirs: dirs
+debiandoc/subdirs manpages/subdirs clean/subdirs veryclean/subdirs:
 	for dir in en $(dir $(DOCDIRLIST)); do \
 		$(MAKE) -C $$dir $(patsubst %/subdirs,%,$@); \
 	done

po/makefile

@@ -30,17 +30,23 @@ GETDOMAIN = $(word 1,$(subst /, ,$(1)))
 # and produce the .pot file.
 $(POTFILES) : $(PO)/%.pot :
 	echo "Generating POT file $@"
-	echo $@ : $(wildcard $(PO)/domains/$*/*.*list) $(addprefix $(BASE)/,$(shell cat $(wildcard $(PO)/domains/$*/*.srclist))) > $@.d
+	echo $@ : $(wildcard $(PO)/domains/$*/*.*list) $(addprefix $(BASE)/,$(shell cat $(wildcard $(PO)/domains/$*/*.srclist))) > $@.d.tmp
+	cmp --silent $@.d.tmp $@.d || mv $@.d.tmp $@.d
 # From sh source
-	cat $(PO)/domains/$*/*.shlist 2> /dev/null | (cd $(BASE) && xargs -n1 bash --dump-po-strings) > $(PO)/domains/$*/sh.pot
+	cat $(PO)/domains/$*/*.shlist 2> /dev/null | (cd $(BASE) && xargs -n1 bash --dump-po-strings) > $(PO)/domains/$*/sh.pot.tmp
+	cmp --silent $(PO)/domains/$*/sh.pot.tmp $(PO)/domains/$*/sh.pot || \
+		mv $(PO)/domains/$*/sh.pot.tmp $(PO)/domains/$*/sh.pot
 # From C/C++ source
 	cat $(PO)/domains/$*/*.srclist > $(PO)/POTFILES_$*.in
 	$(XGETTEXT) --default-domain=$* --directory=$(BASE) \
 	  --add-comments --foreign --keyword=_ --keyword=N_ \
 	  --keyword=P_:1,2 \
-	  --files-from=$(PO)/POTFILES_$*.in -o $(PO)/domains/$*/c.pot
+	  --files-from=$(PO)/POTFILES_$*.in -o $(PO)/domains/$*/c.pot.tmp
+	cmp --silent $(PO)/domains/$*/c.pot.tmp $(PO)/domains/$*/c.pot || \
+		mv $(PO)/domains/$*/c.pot.tmp $(PO)/domains/$*/c.pot
 	rm -f $(PO)/POTFILES_$*.in
-	$(MSGCOMM) --omit-header --more-than=0 $(PO)/domains/$*/c.pot $(PO)/domains/$*/sh.pot --output=$@
+	$(MSGCOMM) --omit-header --more-than=0 $(PO)/domains/$*/c.pot $(PO)/domains/$*/sh.pot --output=$@.tmp
+	cmp --silent $@ $@.tmp || mv $@.tmp $@
 	# copy into the domain dirs to make rosetta happy
 	rm -f $(PO)/domains/$*/*.pot
 	cp $@ $(PO)/domains/$*
@@ -93,4 +99,5 @@ ifneq ($(words $(The_DFiles)),0)
 include $(The_DFiles)
 endif
 
+# otherwise the output is completely screwed
 .NOTPARALLEL:

test/interactive-helper/makefile

@@ -1,6 +1,7 @@
 # -*- make -*-
 BASE=../..
 SUBDIR=test/interactive-helper
+APT_DOMAIN=none
 
 # Bring in the default rules
 include ../../buildlib/defaults.mak

test/libapt/makefile

@@ -2,6 +2,7 @@
 BASE=../..
 SUBDIR=test/libapt
 BASENAME=_libapt_test
+APT_DOMAIN=none
 
 # Bring in the default rules
 include ../../buildlib/defaults.mak