X-Git-Url: https://git.ladys.computer/Shushe/blobdiff_plain/c00f24956715156ae739772cefd04849c3db721b..e5503365cff290808176bec63f9227e5761dee67:/GNUmakefile diff --git a/GNUmakefile b/GNUmakefile index 94f5efa..c654ddb 100644 --- a/GNUmakefile +++ b/GNUmakefile @@ -348,16 +348,16 @@ ifeq ($(MODE),urn:fdc:ladys.computer:20231231:Shu1She4:mode:default) # Non·empty if `help´ or `clean´, and no targets other than `help´ or `clean´, were specified as goals on the commandline. override notbuilding := $(and $(filter help clean,$(MAKECMDGOALS)),$(call not,$(filter-out help clean,$(MAKECMDGOALS)))) -# (callable) Test to see if the prerequisites provided by the second argument matches the value in the file corresponding to the first argument in `$(BUILDDIR)/lastprereqs´. -# If not, save the new value and then add FORCE. -# Return them regardless. +# (callable) Tests to see if the prerequisites provided by the second argument matches the value in the file corresponding to the first argument in `$(BUILDDIR)/lastprereqs´. +# If not, saves the new value. +# Returns the values plus the file in `$(BUILDDIR)/lastprereqs´, which will always be newer than the target if there was a change. # # Calling this variable is useful when a given target should be updated whenever its list of prerequisites changes in addition to whenever there is a change to one of its prerequisites. # # If `$(notbuilding)´ is non·empty, this variable produces no result to avoid unnecessary work. # # ☡ This variable creates at least one subshell every time it is computed. -override diffprereqs = $(if $(notbuilding),,$(if $(subst $(shell $(CAT) $(call quote,$(BUILDDIR)/lastprereqs/$1) 2>>/dev/null || :),,$2),$2 FORCE$(and $(shell $(call ensuredirectory,$(BUILDDIR)/lastprereqs) && $(PRINTF) '%s\n' $(call quote,$2) >|$(BUILDDIR)/lastprereqs/$1),),$2)) +override diffprereqs = $(if $(notbuilding),,$(and $(subst $(shell $(CAT) $(call quote,$(BUILDDIR)/lastprereqs/$1) 2>>/dev/null || :),,$2),$(shell $(call ensuredirectory,$(BUILDDIR)/lastprereqs) && $(PRINTF) '%s\n' $(call quote,$2) >|$(BUILDDIR)/lastprereqs/$1),)$2 $(BUILDDIR)/lastprereqs/$1) # (callable) Escape special characters for use in X·M·L. override xmlesc = $(subst >,>,$(subst <,<,$(subst &,&,$1)))