CODEWITHSUNDEEP
cmakefilecontiki
Stormregion0
Stormregion0

Reputation: 1

Contiki: undefined reference to a function defined in a separate source file

I am writing a program using the Contiki operating system.

I have the remote_firmware.c file and a folder called parser with the files parser.h and parser.c where I wrote the method void test(). I included parser.h in remote_firmware.c with:

#include "parser/parser.h"

The Makefile looks like this:

CONTIKI_PROJECT = remote_firmware
all: $(CONTIKI_PROJECT)

#UIP_CONF_IPV6=1

CONTIKI_WITH_RIME = 1
CONTIKI = $(HOME)/contiki

include $(CONTIKI)/Makefile.include

When I try to build this the Error occurs:

undefined reference to 'test'

I am aware that the Makefile needs to know about parser.h, but I do not know how. I tried several solutions which were proposed here but I guess I did something wrong. Maybe somebody of you know what to do?

Thank you a lot.

Upvotes: 0

Views: 1306

Answers (2)

KillaKem
KillaKem

Reputation: 1025

Where is your source file located? Try adding the source file name to the PROJECT_SOURCEFILES preprocessor variable (i.e PROJECT_SOURCEFILES+=parser.c) and adding the location of the source file to the CONTIKIDIRS preprocessor variable (i.e CONTIKIDIRS+={Directory}).

If parser.c depends on a lot other C files you might want create an C library archive first and then adding the library to your project by adding the name of the library to the TARGET_LIBFILES variable.

Upvotes: 2

cleblanc
cleblanc

Reputation: 3688

The error undefined reference to test is an error from the linker not the compiler. It has nothing to do with including a header file. It means when you linked the executable you didn't include parser.o

Upvotes: 1

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