When there is nothing to output, `xsltproc` does not create files.
However, Make will find itself in an endless restart loop if these
files are never created.
# Build a list of dependencies for each parsed file.
$(BUILDDIR)/dependencies : $(BUILDDIR)/catalog $(call parsed,$(plaintextfiles) $(xmlfiles)) $(THISDIR)/lib/catalog2dependencies.xslt
@$(ECHO) "Identifying dependencies…"
# Build a list of dependencies for each parsed file.
$(BUILDDIR)/dependencies : $(BUILDDIR)/catalog $(call parsed,$(plaintextfiles) $(xmlfiles)) $(THISDIR)/lib/catalog2dependencies.xslt
@$(ECHO) "Identifying dependencies…"
+ $(silent)$(TOUCH) $(call quote,$@)
$(silent)$(XSLTPROC) --nonet --novalid -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2dependencies.xslt) $(call quote,$<)
# Generate a catalog of destinations for files.
$(silent)$(XSLTPROC) --nonet --novalid -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2dependencies.xslt) $(call quote,$<)
# Generate a catalog of destinations for files.
# It does not require knowing the dependencies.
$(BUILDDIR)/destinations : $(BUILDDIR)/catalog $(call parsed,$(filter-out $(assetfiles),$(sourcefiles))) $(THISDIR)/lib/catalog2destinations.xslt
@$(ECHO) "Identifying output destinations…"
# It does not require knowing the dependencies.
$(BUILDDIR)/destinations : $(BUILDDIR)/catalog $(call parsed,$(filter-out $(assetfiles),$(sourcefiles))) $(THISDIR)/lib/catalog2destinations.xslt
@$(ECHO) "Identifying output destinations…"
+ $(silent)$(TOUCH) $(call quote,$@)
$(silent)$(XSLTPROC) --nonet --novalid -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2destinations.xslt) $(call quote,$<)
# Generate the main transform.
$(silent)$(XSLTPROC) --nonet --novalid -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2destinations.xslt) $(call quote,$<)
# Generate the main transform.