Compiling against using makefile

[rshum19]

Hi,

I'm trying to link against the library but I'm having some trouble during compilation with a makefile. I believe the issue is that its not link the libusb-1.0 library since I get the following error:

//usr/local/lib/libcflie.a(CCrazyRadio.cpp.o): In function CCrazyRadio::CCrazyRadio(std::string)': CCrazyRadio.cpp:(.text+0x87): undefined reference tolibusb_init'

My makefile is as followed:

CC = g++ CFLAGS = -Wall -g

all: simple

simple: simple.o ${CC} ${CFLAGS} simple.o -lusb-1.0 -lcflie -o simple

simple.o: simple.cpp CCrazyflie.h ${CC} ${CFLAGS} -c simple.cpp

clean: rm simple.o simple

To point something out I have moved libcflie.a file to /usr/local/lib. Can someone give a had solving this issue??

[fairlight1337]

When you try to compile the CMake project that comes with the library, what happens? It is linking against libusb-1.0 here. If this works, something might be off with your Makefile.

Things you could try:

• Compile the CMake project, look for this message: The USB libs appear to not be installed.
• Change the linking order in your Makefile from -lusb-1.0 -lcflie to -lcflie -lusb-1.0
• Change the compiler from g++ to gcc (this is a rather desperate measure)

Cheers

[rshum19]

The issue was on my Makefile. Changing the linking order solved the issue.

Thanks for the help. Just to let you know I'm using your library to make a Matlab Simulink library.

[fairlight1337]

Great to hear, both of it! When you got the library running, I'd love to have a look!

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