RPi.GPIO with C

[Wolfenstein]

Related to this thread http://forum.pine64.org/showthread.php?tid=723 I am trying to build and use the functions in C. I copied all files from RPi.GPIO-PineA64/source and I made these files


test.c

Code:

#include "c_gpio.h" #include "test.h" int main(void) {    printf("testfunktoin()=%i\n", testfunktion());        setup();        return 0; }

makefile

Code:

HEADERS = test.h c_gpio.h OBJECTS = test.o c_gpio.o default: test %.o: %.c $(HEADERS) gcc -c $< -o $@ test: $(OBJECTS) gcc $(OBJECTS) -o $@ clean: -rm -f $(OBJECTS) -rm -f test

test.h

Code:

int testfunktion(void) {    return 44; }

And I get this compile error:

Code:

$ make gcc test.o c_gpio.o -o test c_gpio.o: In function `setup': c_gpio.c:(.text+0x40): undefined reference to `pinea64_found' c_gpio.c:(.text+0x44): undefined reference to `pinea64_found' c_gpio.c:(.text+0x2cc): undefined reference to `pinea64_found' c_gpio.c:(.text+0x2d0): undefined reference to `pinea64_found' c_gpio.o: In function `clear_event_detect': c_gpio.c:(.text+0x378): undefined reference to `pinea64_found' c_gpio.o:c_gpio.c:(.text+0x37c): more undefined references to `pinea64_found' follow collect2: error: ld returned 1 exit status makefile:12: recipe for target 'test' failed make: *** [test] Error 1