I'm embedding some driver into a Linux kernel when I get this error (I'm adding the device in the board file and registering it):
error: 'kxtf9_get_slave_descr' undeclared here (not in a function)
I located the function above in a driver file
struct ext_slave_descr *kxtf9_get_slave_descr(void)
{
return &kxtf9_descr;
}
EXPORT_SYMBOL(kxtf9_get_slave_descr);
Shouldn't it made "visible" by EXPORT_SYMBOL? The C file containing the code above has no header file (I didn't write it, I just found it here and I'm implementing. They say it's tested so I assume an header is not needed?
The rest of the code compiles perfectly (so it "sees" the code in the folder), and the file containing the code above compiles as well!