Generating pattern rules for various directories

Hello everyone, 

 

I'm trying to write a generic makefile with gnu-make under windows
(unxUtils). The problem is that my source files are not in the same
directory. 

For example : 

Dir1/Dir2 : directory where is located the makefile and some source files
and where I run make.

Dir3/ : some other sources files.

 

So this pattern works for the source files in Dir1/Dir2 but obviously not
for those of Dir3/.

$(OBJDIR)/%.o:%.cpp

                $(CPP) -o $@ -c $< $(CFLAGS) $(foreach
DIRECTORY,$(INCDIRS),-I$(DIRECTORY))

 

So I tried something like that with (INCDIRS=Dir1/Dir2 Dir3 Dir3/Dir4) but
it doesn't work L.

for DIRECTORY in $(INCDIRS) do \

$(OBJDIR)/%.o:$(DIRECTORY)/%.cpp

                $(CPP) -o $@ -c $< $(CFLAGS) $(foreach
DIRECTORY,$(INCDIRS),-I$(DIRECTORY)) done

 

As the directories in INCDIRS change from a project to another I can't write
explicitly the rules. Is there a way to bypass this problem and generate
those targets ?

 

TIA.

 

Pierre-Julien VILLOUD

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