Got a huge warning after recompiling

[Digitalone1]

I can't even paste it here since it's loo long.

https://pastebin.com/0mpxXa6L

I can launch the compiled build, but I don't have any clue on the meaning of these warnings.

[wwmm]

Even with the sanatizer tuned on I do not see so many warnings. And there is none in our automated build https://github.com/wwmm/easyeffects/actions/runs/5004142144/jobs/8966340274. Did you try to build from a clean folder to see if the warnings remain?

[Digitalone1]

I have a _build folder where I give the ninja command. How can a make a clean folder? Delete and recreate _build?

[wwmm]

How can a make a clean folder? Delete and recreate _build?

It is the guaranteed way. You can try ninja clean before doing this. But this is probably only going to clean some compiled objects.

[Digitalone1]

Did it. I got the same warnings.

[Digitalone1]

But I don't see them when I compile from AUR. This is really weird.

[vchernin]

In CI the warnings show up in the GitHub CodeQL job but not in the Arch job.

https://github.com/wwmm/easyeffects/actions/runs/5004142144/jobs/8966331929#step:6:264

The difference between them is that the Arch build has a wrapper around the build (designed to build things into a correct Arch package). Meanwhile the CodeQL build is just a normal Meson build likely similar to what you're doing. Note both jobs are running in the latest Arch container.

There might be slightly different dependencies installed for both.

[wwmm]

I decided to delete my previous build folder and now I see all those warnings. It is probably related to the new gcc version. I will test with clang to see what happens.

[wwmm]

I will test with clang to see what happens.

I forgot Arch does not have the latest clang yet :smile:. So I cannot test this now.

[wwmm]

I am looking at the warnings and it does not seem we can do anything about them. Most if not all are related to /usr/include/c++/13.1.1/bits/specfun.h. It seems to be one of those cases where the compiler shows warnings about the standard c++ library....

[vchernin]

This warning appears depending on the flags used. You can hide the warning by setting one of the following:

• -Dbuildtype=plain (no optimizations and debug info)
• -Dbuildtype=debug (no optimizations)
• -Db_lto=true (enables link time optimization)

e.g. meson setup _build -Dbuildtype=debug

This is why the arch build doesn't show the warning. It uses the PKGBUILD file, which uses arch-meson which enables some of these flags.