Ping? I never saw any response to this.
On Wed, 22 Feb 2017 05:29:47 +0300, Dmitry V Levin wrote:
> Do not define struct iovec in linux/uio.h when <sys/uio.h> or <fcntl.h>
> is already included and provides these definitions.
>
> This fixes the following compilation error when <sys/uio.h> or <fcntl.h>
> is included before <linux/uio.h>:
>
> /usr/include/linux/uio.h:16:8: error: redefinition of 'struct iovec'
>
> Signed-off-by: Dmitry V. Levin <[email protected]>
> ---
> include/uapi/linux/libc-compat.h | 10 ++++++++++
> include/uapi/linux/uio.h | 3 +++
> 2 files changed, 13 insertions(+)
>
> diff --git a/include/uapi/linux/libc-compat.h b/include/uapi/linux/libc-compat.h
> index 481e3b1..9b88586 100644
> --- a/include/uapi/linux/libc-compat.h
> +++ b/include/uapi/linux/libc-compat.h
> @@ -205,6 +205,13 @@
> #define __UAPI_DEF_TIMEZONE 1
> #endif
>
> +/* Coordinate with glibc bits/uio.h header. */
> +#if defined(_SYS_UIO_H) || defined(_FCNTL_H)
> +#define __UAPI_DEF_IOVEC 0
> +#else
> +#define __UAPI_DEF_IOVEC 1
> +#endif
> +
> /* Definitions for xattr.h */
> #if defined(_SYS_XATTR_H)
> #define __UAPI_DEF_XATTR 0
> @@ -261,6 +268,9 @@
> #define __UAPI_DEF_TIMEVAL 1
> #define __UAPI_DEF_TIMEZONE 1
>
> +/* Definitions for uio.h */
> +#define __UAPI_DEF_IOVEC 1
> +
> /* Definitions for xattr.h */
> #define __UAPI_DEF_XATTR 1
>
> diff --git a/include/uapi/linux/uio.h b/include/uapi/linux/uio.h
> index 2731d56..e6e12cf 100644
> --- a/include/uapi/linux/uio.h
> +++ b/include/uapi/linux/uio.h
> @@ -9,15 +9,18 @@
> #ifndef _UAPI__LINUX_UIO_H
> #define _UAPI__LINUX_UIO_H
>
> +#include <linux/libc-compat.h>
> #include <linux/compiler.h>
> #include <linux/types.h>
>
>
> +#if __UAPI_DEF_IOVEC
> struct iovec
> {
> void __user *iov_base; /* BSD uses caddr_t (1003.1g requires void *) */
> __kernel_size_t iov_len; /* Must be size_t (1003.1g) */
> };
> +#endif /* __UAPI_DEF_IOVEC */
>
> /*
> * UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
> --
> ldv
--
Lee Duncan
SUSE Labs