Hi there,

I am building a make file to compile many .cpp files in different
directories, and save .o files into one directory. All source file
names are different.

For example:
/prj/cmn/cmn.cpp
/prj/prj1/prj1.cpp
/prj/prj1/main.cpp

Save .o files to
/out/prj1/cmn.o
/out/prj1/prj1.o
/out/prj1/main.o

I trid to do it like this,

SOURCES := /prj/cmn/cmn.cpp /prj/prj1/prj1.cpp /prj/prj1/main.cpp
OBJECTS := $(addprefix $(OBJDIR)/, $(addsuffix .o, $(basename $(notdir
$(SOURCES)))))

all: /out/prj1/prj1

/out/prj1/prj1 : $(OBJECTS)
$(LINK.cpp) $(DBG_OPTS) -o /out/prj1/prj1 $(OBJECTS)

/out/prj1/%.o : %.cpp
$(COMPILE.cpp) $(DBG_OPTS) -o $@ $<

But it does not work.
Please help me. Thanks in advance.

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rainbowfish888@yahoo.com (Rainbow Fish) wrote in
news:1e996f7d.0312290719.56d74edb@posting.google.com:
quote:

> I am building a make file to compile many .cpp files in different
> directories, and save .o files into one directory. All source file
> names are different.
>
> For example:
> /prj/cmn/cmn.cpp
> /prj/prj1/prj1.cpp
> /prj/prj1/main.cpp
>
> Save .o files to
> /out/prj1/cmn.o
> /out/prj1/prj1.o
> /out/prj1/main.o
>
> I trid to do it like this,
>
> SOURCES := /prj/cmn/cmn.cpp /prj/prj1/prj1.cpp /prj/prj1/main.cpp
> OBJECTS := $(addprefix $(OBJDIR)/, $(addsuffix .o, $(basename $(notdir
> $(SOURCES)))))


Use VPATH for to tell make where to find the sources. Then just set
SOURCES to the names of the files w/o the path. E.g.

VPATH=/prj/cmn;/prj/prj1


Getting the .o files to go into some other directory, I have only done by
running make on the makefile in the dir that the .o files are to go into.
I'd like to see how to do this correctly too.


--
- Mark ->
--

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# I am building a make file to compile many .cpp files in different
# directories, and save .o files into one directory. All source file
# names are different.

I usually handle this in one of two ways, neither of which is very popular
because they don't depend on using every possible trick gnu make provides.

Solution 1: Go ahead and enumerate all the targets.

all: /out/prj1/prj1
/out/prj1/prj1: /out/prj1/cmn.o /out/prj1/prj1.o /out/prj1/main.o
$(LINK.cpp) $(DBG_OPTS) -o /out/prj1/prj1 \
/out/prj1/cmn.o /out/prj1/prj1.o /out/prj1/main.o
/out/prj1/cmn.o: /prj/cmn/cmn.cpp
$(COMPILE.cpp) $(DBG_OPTS) -o /out/prj1/cmn.o /prj/cmn/cmn.cpp
/out/prj1/prj1.o: /prj/prj1/prj1.cpp
$(COMPILE.cpp) $(DBG_OPTS) -o /out/prj1/prj1.o /prj/prj1/prj1.cpp
/out/prj1/main.o: /prj/prj1/main.cpp
$(COMPILE.cpp) $(DBG_OPTS) -o /out/prj1/main.o /prj/prj1/main.cpp


Solution 2: Use a script to create the makefile and do the make

#!/bin/sh
sourceroot=$1
objroot=$2
executable=$3
shift 3
echo all: $executable >makefile
ofiles=""
for cfile in $(find $sourceroot -name '*.cpp' -print)
do
ofile=$objroot/$(basename -s .cpp $cfile).o
ofiles="$ofiles $ofile"
echo $ofile: $cfile \
'; $(COMPILE.cpp) $(DBG_OPTS) -o' $ofile $cfile\[QUOTE] 
done
echo $executable: $ofiles \
'; $(LINK.cpp) $(DBG_OPTS) -o ' $executable $ofiles \[QUOTE] 
make $*

--
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You hate people.
But I love gatherings. Isn't it ironic.

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