Tomi Ollila <tomi.ollila at iki.fi> writes:
> %.o: %.cc $(global_deps)
> - @mkdir -p .deps/$(@D)
> + @mkdir -p $(patsubst %/.,%,.deps/$(@D))
> $(call quiet,CXX $(CPPFLAGS) $(CXXFLAGS)) -c $(FINAL_CXXFLAGS) $< -o $@
> -MD -MP -MF .deps/$*.d
An alternative approach is to use directory marker files [1] to clean up
the recipes that need output directories and to satisfy Paul's second
rule of makefiles [2].
.SECONDEXPANSION:
%.o: %.cc $(global_deps) | .deps/$$(@D)/.DIR
$(call quiet,CXX $(CPPFLAGS) $(CXXFLAGS)) -c $(FINAL_CXXFLAGS) $< -o $@
-MD -MP -MF .deps/$*.d
%/.DIR:
@mkdir -p $(patsubst %/.,%,$(@D))
@touch $@
.PRECIOUS: %.DIR
[1] http://www.cmcrossroads.com/article/making-directories-gnu-make
[2] http://make.paulandlesley.org/rules.html
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