Dirk Eddelbuettel: crc32c 0.0.2 on CRAN: Build Fixes
A first follow-up to the initial
announcement just days ago of the new crc32c
package. The package offers cyclical checksum with parity in
hardware-accelerated form on (recent enough) intel cpus as well as on
arm64.
This follow-up was needed because I missed, when switching to a
default static library build, that newest compilers would
complain if -fPIC was not set. gcc-12 on my
box was happy, gcc-13 on recent Fedora as used at CRAN was
not. A second error was assuming that saying
SystemRequirements: cmake would suffice. But hold on
whippersnapper: macOS always has a surprise for you! As
described at the end of the appropriate section in Writing R
Extensions, on that OS you have to go the basement, open
four cupboards, rearrange three shelves and then you get to use it. And
then in doing so (from an added configure script) I failed
to realize Windows needed a fallback. Gee.
The NEWS entry for this (as well the initial release) follows.
If you like this or other open-source work I do, you can now sponsor me at GitHub.Changes in version 0.0.2 (2023-05-11)
- Explicitly set cmake property for position-independent code
- Help macOS find its cmake binary as detailed also in WRE
- Help Windows with a non-conditional Makevars.win pointing at cmake
- Add more badges to README.md
Changes in version 0.0.1 (2023-05-07)
- Initial release version and CRAN upload
This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.
I hate going out to buy shoes. Even more so I hate buying home shoes, which is what I spend most of my life in, also because no matter what I buy they seem to disintegrate after a season or so. So, obviously, I ve been on a quest to make my own.
As a side note, going barefoot (with socks) would only move the wear issue to the socks, so it s not really a solution, and going bare barefoot on ceramic floors is not going to happen, kaythanksbye.
For the winter I m trying to make knit and felted slippers; I ve had partial success, and they should be pretty easy to mend (I ve just had to do the first mend, with darning and needle felting, and it seems to have worked nicely).
For the summer, I ve been thinking of something sewn, and with the warm season approaching (and the winter slippers needing urgent repairs) I decided it was time to work on them.
I already had a shaped (left/right) pattern for a sole from my hiking sandals attempts (a topic for another post), so I started by drafting a front upper, and then I started to have espadrille feeling and decided that a heel guard was needed.
As for fabric, looking around in the most easily accessible part of the Stash I ve found the nice heavyweight linen I m using for my Augusta Stays, of which I still have a lot and which looked almost perfect except for one small detail: it s very white.
I briefly thought about dyeing, but I wanted to start sewing NOW to test the pattern, so, yeah, maybe it will happen one day, or maybe I ll have patchy dust-grey slippers. If I ll ever have a place where I can do woad dyeing a blue pair will happen, however.
Contrary to the typical espadrillas I decided to have a full lining, and some padding between the lining and the sole, using cotton padding leftovers from my ironing board.
To add some structure I also decided to add a few rows of cording (and thus make the uppers in two layers of fabric), to help prevent everything from collapsing flat.
As for the sole, that s something that is still causing me woes: I do have some rubber sole sheets (see hiking sandals above), but I suspect that they require glueing, which I m not sure would work well with the natural fabric uppers and will probably make repairs harder to do.
In the past I tried to make some crocheted rope soles and they were a big failure: they felt really nice on the foot, but they also self-destroyed in a matter of weeks, which is not really the kind of sole I m looking for.
Now I have some ~ 3 mm twine that feels much harsher on the hands while working it (and would probably feel harsher on the feet, but that s what the lining and padding are for), so I hope it may be a bit more resistant, and I tried to make a braided rope sole.
Of course, I have 
After my father passed away, I brought home most of the personal items
he had, both at home and at his office. Among many, many (many, many,
many) other things, I brought two of his personal treasures: His photo
collection and a box with the 8mm movies he shot approximately between
1956 and 1989, when he was forced into modernity and got a portable
videocassette recorder.
I have talked with several friends, as I really want to get it all in
a digital format, and while I ve been making slow but steady advances
scanning the photo reels, I was particularly dismayed (even though it
was most expected most personal electronic devices aren t meant to
last over 50 years) to find out the 8mm projector was no longer in
working conditions; the lamp and the fans work, but the spindles won t
spin. Of course, it is quite likely it is easy to fix, but it is
beyond my tinkering abilities and finding photographic equipment
repair shops is no longer easy. Anyway, even if I got it fixed,
filming a movie from a screen, even with a decent camera, is a lousy
way to get it digitized.
But almost by mere chance, I got in contact with my cousin Daniel, ho
came to Mexico to visit his parents, and had precisely brought with
him a 8mm/Super8 movie scanner! It is a much simpler piece of
equipment than I had expected, and while it does present some minor
glitches (i.e. the vertical framing slightly loses alignment over the
course of a medium-length film scanning session, and no adjustment is
possible while the scan is ongoing), this is something
that can be decently fixed in post-processing, and a scanning session
can be split with no ill effects. Anyway, it is quite uncommon a
mid-length (5min) film can be done without interrupting i.e. to join a
splice, mostly given my father didn t just film, but also edited a lot
(this is, it s not just family pictures, but all different kinds of
fiction and documentary work he did).
I acquired some unusual input devices to experiment with, like a CNC control
panel and a bluetooth pedal page turner.
These identify and behave like a keyboard, sending nice and simple keystrokes,
and can be accessed with no drivers or other special software. However, their
keystrokes appear together with keystrokes from normal keyboards, which is the
expected default when plugging in a keyboard, but not what I want in this case.
I'd also like them to be readable via evdev and accessible by my own user.
Here's the udev rule I cooked up to handle this use case:
Way back at 
This post serves as a report from my attendance to Kubecon and CloudNativeCon 2023 Europe that took place in
Amsterdam in April 2023. It was my second time physically attending this conference, the first one was in
Austin, Texas (USA) in 2017. I also attended once in a virtual fashion.
The content here is mostly generated for the sake of my own recollection and learnings, and is written from
the notes I took during the event.
The very first session was the opening keynote, which reunited the whole crowd to bootstrap the event and
share the excitement about the days ahead. Some astonishing numbers were announced: there were more than
10.000 people attending, and apparently it could confidently be said that it was the largest open source
technology conference taking place in Europe in recent times.
It was also communicated that the next couple iteration of the event will be run in China in September 2023
and Paris in March 2024.
More numbers, the CNCF was hosting about 159 projects, involving 1300 maintainers and about 200.000
contributors. The cloud-native community is ever-increasing, and there seems to be a strong trend in the
industry for cloud-native technology adoption and all-things related to PaaS and IaaS.
The event program had different tracks, and in each one there was an interesting mix of low-level and higher
level talks for a variety of audience. On many occasions I found that reading the talk title alone was not
enough to know in advance if a talk was a 101 kind of thing or for experienced engineers. But unlike in
previous editions, I didn t have the feeling that the purpose of the conference was to try selling me
anything. Obviously, speakers would make sure to mention, or highlight in a subtle way, the involvement of a
given company in a given solution or piece of the ecosystem. But it was non-invasive and fair enough for me.
On a different note, I found the breakout rooms to be often small. I think there were only a couple of rooms
that could accommodate more than 500 people, which is a fairly small allowance for 10k attendees. I realized
with frustration that the more interesting talks were immediately fully booked, with people waiting in line
some 45 minutes before the session time. Because of this, I missed a few important sessions that I ll
hopefully watch online later.
Finally, on a more technical side, I ve learned many things, that instead of grouping by session I ll group
by topic, given how some subjects were mentioned in several talks.
On gitops and CI/CD pipelines
Most of the mentions went to 
On etcd, performance and resource management
I attended a talk focused on etcd performance tuning that was very encouraging. They were basically talking
about the 
On jobs
I attended a couple of talks that were related to HPC/grid-like usages of Kubernetes. I was truly impressed
by some folks out there who were using Kubernetes Jobs on massive scales, such as to train machine learning
models and other fancy AI projects.
It is acknowledged in the community that the early implementation of things like Jobs and CronJobs had some
limitations that are now gone, or at least greatly improved. Some new functionalities have been added as
well. Indexed Jobs, for example, enables each Job to have a number (index) and process a chunk of a larger
batch of data based on that index. It would allow for full grid-like features like sequential (or again,
indexed) processing, coordination between Job and more graceful Job restarts. My first reaction was: Is that
something we would like to enable in 
It seems I'm having a theme recently on this blog, of making emacs-related posts. Here's another.
I write a bunch of stuff in markdown, such as