Makefile and subdirectories
 

Hi there,

I would like to write down a simple Makefile at the root of my source directory in order to go in each directory to do a make all there.

I'm developping some javacode and a my own library called py. In py, I've got different subfoler in order to keep my source more or less organised:
./py/util (general purpose class, like extra math functions)
./py/images (class which open images, process them)
./py/gui (class of the gui to my program)
./py/io

etc...

In each folder, I've got some .java files and a Makefile. Usually, I go in each directory and perform a make all there and it works. Now, I would like to be smart. I stay in ./ and I type make all. I would like it goes in each subdirectory and perform a make all.

I tried so far and unsuccessfully:

-------------------------------------------------
SHELL = /bin/sh
CC = javac
SUBDIRS = images gui io util
#---------------------------------------------------------------------
# Rules
#---------------------------------------------------------------------

all:
for dir in ${SUBDIRS} ; do ( cd py/$dir ; ${MAKE} all ) ; done

-------------------------------------------------------

It says everything is up to date :(

How can I do?

Thanks for your help,
PY

Try this in your Makefile:

Great! It works very well !

The only point is to give the rule to follow otherwise it takes the first by default !
And a quick question: What the purpose of `set -e'?

It tells it not to exit if the result code is non-zero. This means in practice that it will continue trying to make all the subdirectories even if it encounters errors doing so.

So if you've got

and if make in the images directory fails, it will continue trying to make gui, io, and util.

don't forget to read this:

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

recursive make considered harmful ;)