Can Android.mk echo?

[ezmora]

I'd like my Android.mk to print out some debug output as the
compilation advances.
I tried inserting
echo "some text"
into my Android.mk, but compilation failed.
Is there a way to achieve that?

[mic _]

Let's say the library you're building is called libfoobar. Then this would work inside your Android.mk:

libfoobar:
    @echo "blah blah"


/Michael

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[Jocelyn Houle]

I believe:

  shell> ndk-build V=1

spews out information that is typically sufficient to reproduce compile issue.

If that fails, make can spit out even more information with:

  shell> ndk-build -d

but that can quickly get unwieldy.

The @echo trick is useful, but only when you create your own Makefile targets, which is normally not the case in Android.mk files.

If it's a syntactical issue in the Makefile, you can peek at current variable values using something like the following:

  $(warning Value of MY_VAR is '$(MY_VAR)')

(formatting only meant to be an example)

Note that those warnings are printed when make parses the line; the execution happens once all the files are parsed.  In that sense, it's akin to #warning in a C file.  The @echo trick is the runtime printf() equivalent.

[eyal zmora]

Thanks for your reply.

I tried the @echo trick in my Android.mk but it didn't work.

I receive:      Android.mk:10: *** missing separator.  Stop.

Any ideas?

2011/5/5 Jocelyn Houle <ludosap...@gmail.com>

[Jocelyn Houle]

> Thanks for your reply.
> I tried the @echo trick in my Android.mk but it didn't work.
> I receive: Android.mk:10: *** missing separator. Stop.
> Any ideas?

@echo can only be called in targets (those are indented by a tab after the target declaration).

If you simply want a trace anywhere in your file, use the $(warning ...) function.

[eyal zmora]

$(warning ) is working.

Thanks a lot.

2011/5/5 Jocelyn Houle <ludosap...@gmail.com>

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[Patrick Tsai]

Try $(info YOUR MESSAGE)