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ferg
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Joined: 15 Nov 2002
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Location: Cambridge, UK

PostPosted: Thu May 23, 2013 7:29 am    Post subject: Thingm's BLINK(1) tool Reply with quote

Thingm produce a small USB LED dongle that blinks (Blink(1)!). It was a Kickstarter project that sold really well and is brilliant to use as a notification device. There are many apps to use it, from a small command line tool to GUI ones (e.g. a twitter notifier etc...).

http://thingm.com/products/blink-1.html

Unfortunately I'm having issues getting the executable compiled under Gentoo:

https://getsatisfaction.com/thingm/topics/connected_no_devices_found

Check out the posts towards the bottom of the above thread.

Basically make cannot find the USB libraries.

Code:
chris@scotgate> ~/src/Blink1/blink1/commandline$  LIBS+=-L/usr/lib/ make
building for OS=linux
gcc `pkg-config libusb-1.0 --cflags` -fPIC -std=gnu99 -I ../hardware/firmware  -I./hidapi/hidapi -I./mongoose -g -c blink1-tool.c -o blink1-tool.o
gcc `pkg-config libusb-1.0 --cflags` -fPIC -std=gnu99 -I ../hardware/firmware  -I./hidapi/hidapi -I./mongoose -g -static -g ./hidapi/libusb/hid.o blink1-lib.o  -L/usr/lib/ `pkg-config libusb-1.0 --libs` -lrt -lpthread -ldl blink1-tool.o -o blink1-tool
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lusb-1.0
collect2: ld returned 1 exit status
make: *** [blink1-tool] Error 1
chris@scotgate> ~/src/Blink1/blink1/commandline$


One of the Thingm Support said the following:

Quote:
Okay, I think I see the issue. I guess Gentoo doesn't use "pkg-config", which is what the Makefile is currently using to determine how libusb was installed.

In that case, try building with:
LIBS+=-L/usr/lib make

That will force "/usr/lib" into the library search path during linking.

If anyone reading this is a Gentoo hacker, what's the preferred way of determining package compilation options, a la "pkg-config"?


That does not work. However, are they on the right tracks?
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etimmons
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Joined: 31 Jul 2013
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PostPosted: Wed Jul 31, 2013 10:51 pm    Post subject: Thingm's BLINK(1) tool Reply with quote

Hi ferg, if you haven't figured it out already part of the problem is that the Makefile ThingM provides builds a statically linked binary. I think very few things in Portage require a static version of libusb, so it's unlikely you have the necessary files.

Try either emerging libusb with the static-libs USE flag enabled or give this patch a try:

Code:
diff --git a/commandline/Makefile b/commandline/Makefile
index b8d2568..dca48de 100644
--- a/commandline/Makefile
+++ b/commandline/Makefile
@@ -124,7 +124,7 @@ LIBS   += `pkg-config libusb-1.0 --libs` -lrt -lpthread -ldl
 
 OBJS = ./hidapi/libusb/hid.o
 
-EXEFLAGS = -static
+EXEFLAGS =
 LIBFLAGS = -shared -o $(LIBTARGET) $(LIBS)
 
 EXE=


Hope that helps!
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ferg
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Joined: 15 Nov 2002
Posts: 434
Location: Cambridge, UK

PostPosted: Thu Aug 01, 2013 8:27 am    Post subject: Reply with quote

Nice one, thanks!

I started using blink1raw instead. That works OKish.

I did:

/etc/portage/package.use/libusb

Code:
dev-libs/libusb static-libs


Now for blinking goodness! I'm using it to alert me when a person walks past a motion detecting camera.
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