|
| From: | James McElhannon |
| Subject: | Re: How to: organize application files and get GNU make to put theoutput files into the right place. |
| Date: | Sun, 24 Jan 2010 08:52:43 -0500 |
|
Hi,
I'm still relatively new to make, so sorry
if any of this is obvious or not helpful.
I would try something like
this:
-----
app1: $(app1_src)
$(app1_include) $(libs)
cc $(whatever cc flags you need) test
# if you should build the library before tests, then reverse
the order of these steps.
build_the_library
# to use 'test',
if the test fails, will the compile of test fail, or do you have to run
test?
# if you have to run test, then run it now with its
parameters
# if you run test, and you want make to stop, in test use
exit(n) where n != 0.
test $(whatever params you need)
cc ... whatever is left of the compile for app1
-----
If all of this is standard for each step, you
could try to wildcard the rule with app% or %.exe or whatever the naming
convention is.
-----
If you want make in the app folders to
invoke make for the test, you want to look up 'recursive' make. There are
some strong thoughts out there as to whether or not recursive make is a good
idea, but to me, it makes some things simpler. If you want to do that,
then you would have something like the following:
target:
...
make
some_other_target
...
-----
If you want the make of target to continue
no matter what, then do "make -c some_other_target" do change to its directory
first.
-----
To automate what the building of the
dependencies, there is a flag to the compiler, "cc -M" will go through the files
and find all of the includes for you.
-----
I'm sure there is a cool way to do all of
this using autoconf et al but those are still magical to me.
Hope that helps,
James
From: Ted Byers
Sent: Thursday, January 21, 2010 5:16 PM
To: address@hidden
Subject: How to: organize application files and get GNU make to put
theoutput files into the right place. I made the following directory structure: app1 app1/include app1/src app1/objs app1/test app2 app2/include app2/src app2/objs app2/test lib/src lib/include lib/test If I go into a given objs subdirectory, I can get the object files put into it. So far, so good. I could not get the same result from a given application's directory app1 and app2 both use/ depend on, my library lib. I was hoping it was possible to run make from an application's directory and put the main executable there. And I wanted it to have each source file in each test directory be compiled to an executable in the same directory. I am not sure I can automate inference of what cpp files in src a given exe file in test would depend on (is there a way?). But I want to prevent the production of the application exe or the library, if any of the tests fail. Can I do this entirely from a single makefile in each application's directory, or do I have to put a makefile into the lib and each objs and test directory and somehow have the makefile in each application's directory invoke make on the makefiles in the corresponding objs and test subdirectories? If so, how? If this is in the manual, I seem to have somehow missed it. Thanks for any help you can provide. Ted
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