Re: link errors using MRAA c++ with multiple source files

I tried this way and it worked for me without having to modify the mraa source files using inline.

Instead of #including  with .hpp, I.E. #include "mraa/common.hpp"

I instead included its .h file. I.E. #include "mraa/common.h"

doing this it took care of everything for me, compiled and now works just fine without any mods needed to the mraa source files using inline. 

I then (but you dont have to) created a "headers.h" file. In there i have the following.

#ifndef HEADERS_H_

#define HEADERS_H_

#include <signal.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <signal.h>

#include <stdint.h>

#include <unistd.h>

#include "mraa/common.h"

#include "mraa/spi.h"

#include "mraa/gpio.h"

extern mraa_spi_context spi;

extern mraa_gpio_context gpio;

#include "mcp23s17.h"

#define MS    (1000)

#endif /* HEADERS_H_ */

Then in my main app i just have one #include "headers.h", and in my other source file that takes care of the SPI calls I put the same in there as well.

The trouble for me is that i need both source files to twiddle some I/O pins. Which is what created this whole problem in the first place.

In main, i made these global, and in my headers.h file i externed them so now all sources can use them.

mraa_spi_context spi;

mraa_gpio_context gpio;