On 2020-03-26 23:22 +0000, Ken Moffat via blfs-dev wrote: > On Thu, Mar 26, 2020 at 10:57:03PM +0100, Pierre Labastie via blfs-dev wrote: > > (asking about only one item) > > > If you do not do this, configuring will fail with a python traceback > > > report referencing a /usr/lib/pythonN.N/multiprocessing/synchronize.py > > > file and ending 'OSError: [Errno 38] Function not implemented'. > > > (this explanation possibly in italics, i.e. emphasis, except for the > > > filename markup) > > > > As the starter of this thread, I do not see exactly this error, but rather: > > > > File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 59, in > > <module> > > " function, see issue 3770.") > > ImportError: This platform lacks a functioning sem_open implementation, > > therefore, the required synchronization primitives needed will not function, > > see issue 3770. > >
from tmpfs (5): > A tmpfs filesystem mounted at /dev/shm is used for the implementation > of POSIX shared memory (shm_overview(7)) and POSIX semaphores > (sem_overview(7)). In kernel doc (Documentation/filesystems/tmpfs.txt): > 2) glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for > POSIX shared memory (shm_open, shm_unlink). Adding the following > line to /etc/fstab should take care of this: > > tmpfs /dev/shm tmpfs defaults 0 0 > > Remember to create the directory that you intend to mount tmpfs on > if necessary. > > This mount is _not_ needed for SYSV shared memory. The internal > mount is used for that. (In the 2.3 kernel versions it was > necessary to mount the predecessor of tmpfs (shm fs) to use SYSV > shared memory) So I think we should mount a tmpfs to /dev/shm, anyway. In lfs-systemd it's automatically done by systemd. In lfs-sysv book the mountvirtfs bootscript makes /run/shm and link it to /dev/shm. I think it's a "hack" which is deprecated, and shall be replaced with a line mounting a tmpfs to /dev/shm, in /etc/fstab. > Which package is this which does not mention OSError, please ? > > ĸen > -- > When alle is ſayed and all is done, ye must chooſe your faces wisely, > for soon enouff ye will be playing with fyre." > The Nice and Accurate Prophecies of Agnes Nutter, Prophecy 5004 -- Xi Ruoyao <xry...@mengyan1223.wang> School of Aerospace Science and Technology, Xidian University -- http://lists.linuxfromscratch.org/listinfo/blfs-dev FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
