Re: text functions in implicit rules

[Jan Althaus]

Eeeexcellent. That did the trick. :)
Thanks!!

Jan

PS: Should anyone care, here's what I ended up using:


MANGLESLASH := @
MANGLEDOTDOT := __
MANGLECOLON := --

# Mangling
define mangle
$(subst :,$(MANGLECOLON), $(subst ..,$(MANGLEDOTDOT),$(subst /,$ 
(MANGLESLASH),$(basename $(1)))))
endef

define mangleobj
$(OBJSDIR)/$(addsuffix .o,$(call mangle,$(1)))
endef

define mangledep
$(DEPSDIR)/$(addsuffix .d,$(call mangle,$(1)))
endef

# Object targets
define mkobject
$(call mangleobj,$(1)) : $(1) $(call mangledep,$(1))
        @echo Compiling: $(1)
	$(NE)$(CXX) $(CFLAGS) $(CPPFLAGS) $(addprefix -I, $(INCLUDE)) -c -o $ 
(call mangleobj,$(1)) $(1)
endef

$(foreach s,$(CPPSRC),$(eval $(call mkobject,$(s))))

# Dependency file targets
define mkdepend
$(call mangledep,$(1)) : $(1)
        @echo Dependencies: $(1)
	$(NE)$(CXX) -M -MF $(call mangledep,$(1)) -MT $(call mangleobj,$(1))  
$(CFLAGS) $(CPPFLAGS) $(addprefix -I, $(INCLUDE)) $(1)
endef

$(foreach s,$(CPPSRC),$(eval $(call mkdepend,$(s))))



On 13 Apr 2008, at 00:29, Brian Dessent wrote:
> Jan Althaus wrote:
>
> > is it at all possible to create an implicit rule that'd do something
> > similar to:
> > %.o: $(subst foo,bar,%.cpp)
> >
> > The reason I'm asking is that I'd like to have a makefile that takes
> > a list of source files that are potentially scattered over different
> > directories, but builds the objects/dependency files into a single,
> > common dir.
> > The idea would've been to mangle the names so e.g. ../foo/bar.cpp
> > would become address@hidden@bar.o
> >
> > Am I fundamentally asking the wrong question? Is there a way of doing
> > this without scattering the objects/dependencies over the sources
> > dirs? (in a way that allows the list to contain absolute paths and
> > the like?)
>
> I don't know that you can do this with implicit rules, but you can  
> do it
> by using foreach to evalulate a function that generates the dependency
> for each target:
>
> define mkdepend
> $(addsuffix .o,$(subst .,_,$(subst /,@,$(basename $(1))))): $(1)
> endef
>
> src = ../foo/bar1.cpp ../foo/bar2.cpp ../foo/bar3.cpp
>
> $(foreach s,$(src),$(eval $(call mkdepend,$(s))))
>
> You can change 'eval' to 'info' to debug this, in which case you'll  
> see
> the produced rules:
>
> address@hidden@bar1.o: ../foo/bar1.cpp
> address@hidden@bar2.o: ../foo/bar2.cpp
> address@hidden@bar3.o: ../foo/bar3.cpp
>
> Brian