Hello all, I have a situation where, I have one parent module in ../hello/ directory which exports one symbol (g_my_export). I have a dependent module in ../hello1/ directory. Both have it's own makefiles. Compiling of parent module (hello.ko) is fine, but during compilation of dependent module (hello1.ko) I see a warning that g_my_export is undefined. On the other hand when I do depmod -a and modprobe, dependent module inserts successfully in kernel. I want to remove compile time warning. What should I do? The source and makefile of both parent and dependent module is attached with this mail. Thanks Devesh.
#include <linux/init.h>
#include <linux/module.h>
MODULE_LICENSE("Dual BSD/GPL");
int g_my_export = 0xA ;
static int hello_init(void)
{
printk(KERN_ALERT "Hello, world\n");
return 0;
}
static void hello_exit(void)
{
printk(KERN_ALERT "Goodbye, cruel world\n");
}
EXPORT_SYMBOL(g_my_export) ;
module_init(hello_init);
module_exit(hello_exit);
Attachment:
Makefile
Description: Binary data
#include <linux/init.h>
#include <linux/module.h>
MODULE_LICENSE("Dual BSD/GPL");
extern int g_my_export ;
static int hello_init(void)
{
printk(KERN_ALERT "Hello, world1\n");
printk("Value in g_my_export=%d\n",g_my_export) ;
return 0;
}
static void hello_exit(void)
{
printk(KERN_ALERT "Goodbye, cruel world1\n");
}
module_init(hello_init);
module_exit(hello_exit);
Attachment:
Makefile
Description: Binary data
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