How can I separate the src/ from the obj/ tree, using make? It looks
chaotic when my src folder is full of .o files.

The tricky thing is I have src files with the same name, just in
different subdirectories:
src/main.cpp
src/bmw/car.cpp
src/mercedes/car.cpp

Now, (GNU) make should place the obj files into obj, preserving the
directory structure:
obj/main.o
obj/bmw/car.o
obj/mercedes/car.o

This should be the most natural thing in the world for make to do. But
it seems it's tricky...?

Markus

Here is my stupid Makefile that just puts the o files next to the src
files:

SRC=src
OBJ=obj
FILES=main bmw/car mercedes/car
OFILES=$(FILES:%=$(SRC)/%.o)
TARGET=cars

all: $(TARGET)

$(TARGET): $(OFILES)
g++ $(OFILES) -o $@

%.o: %.cpp
g++ -I$(SRC) -c -o $@ $<

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markus.cl@gmx.de (Markus Dehmann) writes:
> How can I separate the src/ from the obj/ tree, using make? It looks
> chaotic when my src folder is full of .o files.
> [...]
> %.o: %.cpp
> 	g++ -I$(SRC) -c -o $@ $<

Either use VPATH (but then you have to put the Makefile or a symlink
in the object directories), or specify the absolute paths:

$(OBJDIR)$(REL).o : $(SRCDIR)$(REL).c
g++ -I$(SRC) -c -o $@ $<


You could get good ideas from:

http://www.canb.auug.org.au/~miller...-cons-harm.html

--
__Pascal Bourguignon__                     http://www.informatimago.com/

There is no worse tyranny than to force a man to pay for what he does not
want merely because you think it would be good for him. -- Robert Heinlein

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Pascal> You could get good ideas from:
Pascal> http://www.canb.auug.org.au/~miller...-cons-harm.html

This is also very worthy of reading:

http://make.paulandlesley.org/

--
"It's not true or not."  A reality show producer (real quote)

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