Re: [PATCH 2/4] Avoid multiple definitions of copy_file_range

[Samuel Thibault]

Hello,

Manolo de Medici, le mer. 17 janv. 2024 15:47:09 +0100, a ecrit:
> ../../../block/file-posix.c:2003:14: error: conflicting types for
> 'copy_file_range'; have 'off_t(int,  off_t *, int,  off_t *, size_t,
> unsigned int)' {aka 'long long int(int,  long long int *, int,  long
> long int *, unsigned int,  unsigned int)'}
>  2003 | static off_t copy_file_range(int in_fd, off_t *in_off, int out_fd,
>       |              ^~~~~~~~~~~~~~~
> In file included from /root/qemu/include/qemu/osdep.h:122,
>                  from ../../../block/file-posix.c:25:
> /usr/include/unistd.h:1142:9: note: previous declaration of
> 'copy_file_range' with type 'ssize_t(int,  __off64_t *, int,
> __off64_t *, size_t,  unsigned int)' {aka 'int(int,  long long int *,
> int,  long long int *, unsigned int,  unsigned int)'}
>  1142 | ssize_t copy_file_range (int __infd, __off64_t *__pinoff,
>       |         ^~~~~~~~~~~~~~~
> 
> the current patch fixes this compilation error.

Yes, but by ignoring the difference :)

The prototype of copy_file_range in glibc really does say that it
returns an ssize_t, not an off_t, so that should be fixed so.

Samuel