668293 - makefiles: add logic to identify classes of makefile targets and use to inhibit needless work

Status: NEW

(Firefox Build System :: General, defect)

Description

[Joey Armstrong [:joey]]

Clean targets would be one the obvious candidate.  When a requested make target is of type clean define macros whose value can be used to conditionally inhibit all generation and build activities:
  o skip autoconf
  o skip autogen
  o ...


Initially the setup could be based on MAKECMDGOALS but that answer will need a special case as "gmake clean build" would not work properly until all cases could be handled.

tmp = $(filter clean%,$(MAKECMDGOALS))
tmp += $(filter %clean,$(MAKECMDGOALS))
tmp := $(sort $(strip tmp))
ifneq (,$(tmp))
  ifneq ($(words $(MAKECMDGOALS)),$(words $(tmp)))
    isCleanTarget := $(tmp)
  endif
endif
undefine tmp


ifndef isCleanTarget
configure-files:
endif