cmake-init-conan-example VS JDK

I haven't really used conan but you should not use the cmake generator, you should use the CMakeDeps and CMakeToolchain generators instead. That might solve your problem, after all there is a reason why the cmake generator is being deprecated. Check this for an example: https://github.com/friendlyanon/cmake-init-conan-example

Use a package manager. This example shows how to use vcpkg to get json-c. You can do the same using Conan as well.

You ought to call Conan before configuring. Take a look at this example.

Conan and vcpkg are the only options. I use them both, depends on what kinds of dependencies I want to pull. vcpkg is easier to setup custom one-off dependencies with using overlay ports, while Conan is faster at things if your profile fits one that has a pre-built binary in CCI. Both are trivial to integrate with a CMake project, see these examples for Conan and vcpkg.

More details in this example project.

I have an example for Conan integration that I'm planning on revisiting, since it was made when I knew less about Conan. If you are interested in a concrete example, you can check it out later.

Integrating with Conan is already pretty straightforward, you just need a short script to glue things together via the Conan provided CMake utility.

You can check out the CI for this example project. It doesn't yet have caching for Conan setup, but Qt has prebuilt binaries in the CCI anyway, so that's not really that big of a deal.

The CMake scripts could definitely use improvement. Here is an example using Conan that also installs fmt. The shell scripts can also be entirely replaced with CMake presets, also examplified in the earlier link.

Or Conan + CMake. In fact, I would much prefer to use Conan in a company environment, but vcpkg is top notch for open source. Not to say Conan is bad at that, not even close, but its features are excellent to get companies to move to package managers.

I felt out of the loop, thinking that Zero VM was some kind of new distro for OpenJDK but chasing <https://packages.debian.org/sid/openjdk-22-jre-zero#:~:text=...> to <https://sources.debian.org/src/openjdk-11/11.0.23%2B9-1/debi...> lead me to https://github.com/openjdk/jdk/tree/jdk-22-ga/src/hotspot/cp...

It seems that it's a specific CPU target for the Hotspot JIT for non-mainstream architectures (or for research purposes, as I saw mentioned once)

Completely gutted from the OpenJDK, last I checked. See here for the culprit PR: https://github.com/openjdk/jdk/pull/18688

> Yes, they're changing one aspect of signal handler use to work around this problem. They're not stopping the use of signal handlers in general. Hotspot continues to use signals for efficiency in general. See https://github.com/openjdk/jdk/blob/9059727df135dc90311bd476...

This whole thread is about SIGSEGV, and specifically their SIGSEGV handling. However, catching normal signals is not about efficiency.

Some of their exception handling is still odd: There is no reason for a program that receives SIGILL to ever attempt continuing. But others is fine, like catching SIGFPE to just forward an exception to the calling code.

(Sure, you could construct an argument to say that this is for efficiency if you considered the alternative to be implementing floating point in software so that all exceptions exist in user-space, but hardware floating point is the norm and such alternative would be wholly unreasonable.)

> The wonderful thing about choosing not to care about facts is having whatever opinions you want.

I appreciate the irony of you making such statement, proudly thinking that your opinion equals fact, and therefore any other opinion is not.

This discussion is nothing but subjective opinion vs. subjective opinion. Facts are (hopefully, as I can only speak for myself) inputs to both our opinions, but no opinion about "good" or "bad", "nasty" or not can ever be objective. Objective code quality does not exist.

I remember talking to Brendan about the PreserveFramePointer patch during my first months at Netflix in 2015. As of JDK 21, unfortunately it is no longer a general purpose solution for the JVM, because it prevents a fast path being taken for stack thawing for virtual threads: https://github.com/openjdk/jdk/blob/d32ce65781c1d7815a69ceac...