Re: Build 0.6 version fail on musl libc

["Milan P. Stanić" <mps@arvanta.net>]

On Wed, 2020-04-29 at 14:43, Jens Axboe wrote:
> On 4/29/20 2:38 PM, Milan P. Stanić wrote:
> > On Wed, 2020-04-29 at 14:08, Jens Axboe wrote:
> >> On 4/29/20 2:01 PM, Milan P. Stanić wrote:
> >>> On Wed, 2020-04-29 at 13:38, Jens Axboe wrote:
> >>>> On 4/29/20 1:33 PM, Milan P. Stanić wrote:
> >>>>> On Wed, 2020-04-29 at 10:14, Jens Axboe wrote:
> >>>>>> On 4/29/20 9:29 AM, Jens Axboe wrote:
> >>>>>>> On 4/29/20 9:26 AM, Christoph Hellwig wrote:
> >>>>>>>> On Wed, Apr 29, 2020 at 09:24:40AM -0600, Jens Axboe wrote:
> >>>>>>>>>
> >>>>>>>>> Not sure what the best fix is there, for 32-bit, your change will truncate
> >>>>>>>>> the offset to 32-bit as off_t is only 4 bytes there. At least that's the
> >>>>>>>>> case for me, maybe musl is different if it just has a nasty define for
> >>>>>>>>> them.
> >>>>>>>>>
> >>>>>>>>> Maybe best to just make them uint64_t or something like that.
> >>>>>>>>
> >>>>>>>> The proper LFS type would be off64_t.
> >>>>>>>
> >>>>>>> Is it available anywhere? Because I don't have it.
> >>>>>>
> >>>>>> There seems to be better luck with __off64_t, but I don't even know
> >>>>>> how widespread that is... Going to give it a go, we'll see.
> >>>>>
> >>>>> AFAIK, __off64_t is glibc specific, defined in /usr/include/fcntl.h:
> >>>>> ------
> >>>>> # ifndef __USE_FILE_OFFSET64
> >>>>> typedef __off_t off_t;
> >>>>> # else
> >>>>> typedef __off64_t off_t;
> >>>>> # endif
> >>>>> ------
> >>>>>
> >>>>> So, this will not work on musl based Linux system, git commit id
> >>>>> b5096098c62adb19dbf4a39b480909766c9026e7 should be reverted. But you
> >>>>> know better what to do.
> >>>>>
> >>>>> I come with another quick and dirty patch attached to this mail but
> >>>>> again  I think it is not proper solution, just playing to find (maybe)
> >>>>> 'good enough' workaround.
> >>>>
> >>>> Let's just use uint64_t.
> >>>
> >>> This works. Thanks.
> >>>
> >>> Next issue is this:
> >>> ----
> >>> make[1]: Entering directory '/work/devel/liburing/src'
> >>>      CC setup.ol
> >>>      CC queue.ol
> >>>      CC syscall.ol
> >>> In file included from syscall.c:9:
> >>> include/liburing/compat.h:6:2: error: unknown type name 'int64_t'
> >>>     6 |  int64_t  tv_sec;
> >>>       |  ^~~~~~~
> >>> make[1]: *** [Makefile:43: syscall.ol] Error 1
> >>> make[1]: Leaving directory '/work/devel/liburing/src'
> >>> make: *** [Makefile:12: all] Error 2
> >>> ----
> >>>
> >>> I fixed it with this patch:
> >>> --
> >>> diff --git a/configure b/configure
> >>> index 30b0a5a..4b44177 100755
> >>> --- a/configure
> >>> +++ b/configure
> >>> @@ -301,6 +301,7 @@ EOF
> >>>  fi
> >>>  if test "$__kernel_timespec" != "yes"; then
> >>>  cat >> $compat_h << EOF
> >>> +#include <stdint.h>
> >>>  struct __kernel_timespec {
> >>>   int64_t   tv_sec;
> >>>   long long tv_nsec;
> >>> --
> >>>
> >>> but not sure will that work on glibc.
> >>
> >> That should work fine on glibc. Care to send as an actual
> >> patch, with commit message and signed-off-by? Then I'll add
> >> it to liburing.
> > 
> > patch is attached.
> 
> Great thanks, I added a bit to your commit message. Here it is:
> 
> https://git.kernel.dk/cgit/liburing/commit/?id=8171778c835b6be517c314cf23dd1f5ae061a117

Nice. I'm bad in writing commit messages. Thanks
 
-- 
regards