41b065336f
check conditions of make for equality of variables with an empty value instead of check definition. A defined but empty variable under all these conditions results errors.
74 lines
2.0 KiB
Makefile
74 lines
2.0 KiB
Makefile
# this makefile can be used standalone
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# drop stock predefined rules
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.DEFAULT:
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SYMLINK = build
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# tmpfs-sparing extra rule: cleanup workdir after completing each stage
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# (as packed results are saved this only lowers RAM pressure)
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# NB: it's useful enough to be enabled by default in DEBUG abscence
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ifeq (,$(DEBUG))
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CLEAN ?= 1
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endif
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ifneq (,$(CLEAN))
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export GLOBAL_CLEAN_WORKDIR = clean-current
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ifneq (,$(DEBUG))
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WARNING = (NB: DEBUG scope is limited when CLEAN is enabled)
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endif
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endif
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# ordinary clean: destroys workdirs but not the corresponding results
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# NB: our output MUST go into stderr to escape POSTPROC
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clean:
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@{ \
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find -name '*~' -delete >&/dev/null ||:; \
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if [ -L "$(SYMLINK)" -a -d "$(SYMLINK)"/ ]; then \
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if [ -z "$(QUIET)" ]; then \
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echo "$(TIME) cleaning up $(WARNING)"; \
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fi; \
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$(MAKE) -C "$(SYMLINK)" $@ \
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GLOBAL_BUILDDIR="$(realpath $(SYMLINK))" $(LOG) ||:; \
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fi; \
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} >&2
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# there can be some sense in writing log here even if normally
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# $(BUILDDIR)/ gets purged: make might have failed,
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# and BUILDLOG can be specified by hand either
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distclean: clean
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@{ \
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if [ -L "$(SYMLINK)" -a -d "$(SYMLINK)"/ ]; then \
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build="$(realpath $(SYMLINK)/)"; \
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if [ "$$build" = / ]; then \
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echo "** ERROR: invalid \`"$(SYMLINK)"' symlink" >&2; \
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exit 128; \
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else \
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$(MAKE) -C "$(SYMLINK)" $@ \
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GLOBAL_BUILDDIR="$$build" $(LOG) ||:; \
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rm -rf "$$build"; \
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fi; \
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fi; \
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rm -f "$(SYMLINK)"; \
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} >&2
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# builddir existing outside read-only metaprofile is less ephemeral
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# than BUILDDIR variable is -- usually it's unneeded afterwards
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postclean: build-image
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@{ \
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if [ "$(CLEAN)" != 0 ] && \
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[ "0$(DEBUG)" -lt 2 ] && \
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[ -z "$(CHECK)" ] && \
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[ -z "$(REPORT)" ] && \
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[ "$(NUM_TARGETS)" -gt 1 \
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-o ! -t 1 \
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-o ! -L "$(SYMLINK)" ]; \
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then \
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if [ -z "$(QUIET)" ]; then \
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echo "$(TIME) cleaning up after build"; \
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fi; \
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$(MAKE) -C "$(BUILDDIR)" distclean \
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GLOBAL_BUILDDIR="$(BUILDDIR)" $(LOG) ||:; \
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rm -rf "$(BUILDDIR)"; \
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fi; \
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} >&2
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