Hi, Martin.

The [$KERNEL_ROOT/include/uapi/linux/stddef.h] you are talking about is just a 
few lines:

| #include <linux/compiler_types.h>
|
| #ifndef __always_inline
| #define __always_inline inline
| #endif

it turns into

| #ifndef __always_inline
| #define __always_inline inline
| #endif

after [make headers_install] installs it into [/usr/include/linux/stddef.h].

Userspace applications shall not use kernel tree directly.

Regards, Konstantin.

Martin Kaiser, 25 jul 2010 00:20 msk:

I called gcc with -I $KERNEL_ROOT/include/uapi. This is the chain of files that 
were included.

my_app.c
    $GCC_SYSROOT/usr/include/netinet/in.h
       ...

and the error is

$KERNEL_ROOT/include/uapi/linux/stddef.h:2:34: fatal error: linux/compiler_types.h: 
No such file or directory #include <linux/compiler_types.h>

Best regards, Martin

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