Calling go functions from C

General
1

Hi,

i am trying to write a code, where i call Go API to return a value.
i am making use of portstatus.c example in the examples/dp/find_next directory.

i have written a gofile.
myfunc.go
did -> go build -buildmode=c-shared -o myfunc.a myfunc.go

the above command generated .a file(library) and myfunc.h file

i included this .h header file in portstatus.c code
and tried calling the func get_entry defined in myfunc.go

when i did make all
i got this error
root@mars01> make all
cc -o portstatus portstatus.o /opt/confd//lib/libconfd.a -lpthread -lm
portstatus.o: In function get_elem': /opt/confd/examples.confd/dp/find_next/portstatus.c:181: undefined reference toget_entry’
collect2: error: ld returned 1 exit status

i was supposed to link the static library using
gcc -o portstatus portstatuc.c myfunc.a

this gave me a error
root@mars01> gcc -o portstatus portstatus.c gofunc.a
portstatus.c:14:23: fatal error: confd_lib.h: No such file or directory
#include <confd_lib.h>
^
compilation terminated.

Can someone let me know the steps in how to make use of GO functions in C and how to compile it

Thanks in Advance
Roopa

2

Hi Roopa,

In your second attempt to link the portstatus app you forgot the rest of the libraries portstatus needs. The command, assuming that you already have portstatus.o, should be:
$ cc -o portstatus portstatus.o /opt/confd//lib/libconfd.a -lpthread -lm myfunc.a

/J

3

You need to look somewhere else for help in calling Go from C. That has nothing to do with ConfD. We can help you with calling our supported APIs; C, etc. and using C with ConfD. Calling Go from your C application is out-of-scope and does not involve anything from ConfD.

4

Anyway we resolved it by ourselves
Thanks.