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# -*- coding: utf-8; mode: makefile-gmake -*-
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# SPDX-License-Identifier: AGPL-3.0-or-later
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ifeq (,$(wildcard /.lxcenv.mk))
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PHONY += lxc-activate lxc-purge
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lxc-activate:
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@$(MAKE) -s -f "$$(dirname $(abspath $(lastword $(MAKEFILE_LIST))))/makefile.lxc" lxc-activate
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lxc-purge:
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$(Q)rm -rf ./lxc-env
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else
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include /.lxcenv.mk
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endif
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PHONY += make-help
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ifeq (,$(wildcard /.lxcenv.mk))
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make-help:
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else
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make-help: lxc-help
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endif
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@echo 'options:'
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@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
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@echo ' make V=2 [targets] 2 => give reason for rebuild of target'
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ifeq ("$(origin V)", "command line")
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VERBOSE = $(V)
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endif
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ifndef VERBOSE
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VERBOSE = 0
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endif
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export VERBOSE
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ifeq ($(VERBOSE),1)
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quiet =
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Q =
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else
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quiet=quiet_
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Q = @
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endif
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# stolen from linux/scripts/Kbuild.include
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#
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# Convenient variables
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squote := '
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#' this comment is only for emacs highlighting
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# Find any prerequisites that is newer than target or that does not exist.
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# PHONY targets skipped in both cases.
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any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
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#
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###
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# why - tell why a a target got build
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# enabled by make V=2
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# Output (listed in the order they are checked):
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# (1) - due to target is PHONY
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# (2) - due to target missing
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# (3) - due to: file1.h file2.h
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# (4) - due to command line change
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# (5) - due to missing .cmd file
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# (6) - due to target not in $(targets)
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# (1) PHONY targets are always build
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# (2) No target, so we better build it
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# (3) Prerequisite is newer than target
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# (4) The command line stored in the file named dir/.target.cmd
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# differed from actual command line. This happens when compiler
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# options changes
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# (5) No dir/.target.cmd file (used to store command line)
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# (6) No dir/.target.cmd file and target not listed in $(targets)
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# This is a good hint that there is a bug in the kbuild file
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ifeq ($(VERBOSE),2)
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why = \
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$(if $(filter $@, $(PHONY)),- due to target is PHONY, \
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$(if $(wildcard $@), \
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$(if $(strip $(any-prereq)),- due to: $(any-prereq), \
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$(if $(arg-check), \
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$(if $(cmd_$@),- due to command line change, \
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$(if $(filter $@, $(targets)), \
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- due to missing .cmd file, \
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- due to $(notdir $@) not in $$(targets) \
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) \
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) \
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) \
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), \
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- due to target missing \
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) \
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)
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echo-why = $(call escsq, $(strip $(why)))
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endif
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#
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###
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# Escape single quote for use in echo statements
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escsq = $(subst $(squote),'\$(squote)',$1)
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#
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# echo command.
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# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
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echo-cmd = $(if $($(quiet)cmd_$(1)),echo '$(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
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#
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# printing commands
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cmd = @$(echo-cmd) $(cmd_$(1))
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.PHONY: $(PHONY)
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