Switch from PackageCompiler to JuliaC without trimming

[visr]

Trying #2629 again now that we are some patch releases further along.
EDIT: the switch to Julia v1.12 is now done with #2815, I rebased this to only add the JuliaC switch, which is less urgent.

For JuliaC we use this branch: JuliaLang/JuliaC.jl#47. That should set the desired CPU_TARGET, which was the main reason for reverting the previous attempt.

Status: I can run the TeamCity JuliaC generated binaries locally, so the CPU_TARGET seems to work. The Linux binaries seem to for some models. The libribasim.dll file grew from 0.9 to 1.2 GB.

Update: this now works well on Windows. There is a libribasim.dll.a added to the zip root that we perhaps should remove, but the Windows build went from 1h40m to 1h8m, and testing the binaries from 20m to 17m as well so latency doesn't seem increased. I ran the Windows binaries locally.

The binary wasn't working directly for me on Linux only after fiddling with the load path, we need to fix that, perhaps in main.rs or with a JuliaC rpath option or such. EDIT: see JuliaLang/JuliaC.jl#109

Details, now fixed with rpath=`@bundle`

visser_mn@v-h7rdp002 ~/bin  $ ribasim/bin/ribasim ~/ribasim-nl/trivial/ribasim.toml 
Failed to load libribasim from "/u/visser_mn/bin/ribasim/bin/../lib/libribasim.so"
Error: DlOpen { desc: "libjulia.so.1.12: cannot open shared object file: No such file or directory" }
visser_mn@v-h7rdp002 ~/bin  $ export LD_LIBRARY_PATH=~/bin/ribasim/lib:$LD_LIBRARY_PATH
visser_mn@v-h7rdp002 ~/bin  $ ribasim/bin/ribasim ~/ribasim-nl/trivial/ribasim.toml 
Failed to load libribasim from "/u/visser_mn/bin/ribasim/bin/../lib/libribasim.so"
Error: DlOpen { desc: "libjulia-internal.so.1.12: cannot open shared object file: No such file or directory" }
visser_mn@v-h7rdp002 ~/bin  $ ldd ~/bin/ribasim/bin/ribasim
	linux-vdso.so.1 (0x00007ffe803d2000)
	libdl.so.2 => /lib64/libdl.so.2 (0x00007f79b3905000)
	libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f79b36ed000)
	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f79b34cd000)
	libc.so.6 => /lib64/libc.so.6 (0x00007f79b30f7000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f79b3b09000)
visser_mn@v-h7rdp002 ~/bin  $ ldd ~/bin/ribasim/lib/libribasim.so 
	linux-vdso.so.1 (0x00007ffc99973000)
	libjulia.so.1.12 => /u/visser_mn/bin/ribasim/lib/libjulia.so.1.12 (0x00007fcc064d7000)
	libjulia-internal.so.1.12 => not found
	libc.so.6 => /lib64/libc.so.6 (0x00007fcbc1277000)
	libdl.so.2 => /lib64/libdl.so.2 (0x00007fcbc1073000)
	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fcbc0e53000)
	/lib64/ld-linux-x86-64.so.2 (0x00007fcc062cd000)
visser_mn@v-h7rdp002 ~/bin  $ export LD_LIBRARY_PATH=~/bin/ribasim/lib:~/bin/ribasim/lib/julia:$LD_LIBRARY_PATH
visser_mn@v-h7rdp002 ~/bin  $ ribasim/bin/ribasim ~/ribasim-nl/trivial/ribasim.toml 
┌ Info: Starting a Ribasim simulation at 2026-01-26T23:16:08.652.
│   toml_path = "/u/visser_mn/ribasim-nl/trivial/ribasim.toml"
│   cli.ribasim_version = "2026.1.0-rc1"
│   starttime = 2020-01-01T00:00:00
│   endtime = 2021-01-01T00:00:00
└   threads = 1
┌ Warning: The following experimental features are enabled: concentration
└ @ Ribasim /opt/teamcityagent/work/ecd2b8f9b25b1609/ribasim/core/src/logging.jl:51
[ Info: Computation time: 503 milliseconds
[ Info: The model finished successfully at 2026-01-26T23:16:14.037.

It seems the default of the JuliaC LinkRecipe is the magic string @julia, whereas we need the magic string @bundle.

$ objdump -p libribasim.so | grep -E 'RPATH|RUNPATH'
  RPATH                /u/svc-teamcity-ansible/.julia/juliaup/julia-1.12.4+0.x64.linux.gnu/lib:/u/svc-teamcity-ansible/.julia/juliaup/julia-1.12.4+0.x64.linux.gnu/lib/julia

[evetion]

Nice! This is pretty quick to build locally and it's the first time I could just run the executable without first moving dylibs around.