# Using OrdinaryDiffEq.jl as a native ODE solver library from Rust with JuliaC --trim

**URL:** <https://discourse.julialang.org/t/using-ordinarydiffeq-jl-as-a-native-ode-solver-library-from-rust-with-juliac-trim/140333>\
**Category:** General Usage\
**Created:** [October 29, 2026, 9:55am UTC](https://discourse.julialang.org/t/using-ordinarydiffeq-jl-as-a-native-ode-solver-library-from-rust-with-juliac-trim/140333 "2026-10-29T09:55:46Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![yolhan\_mannes](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yolhan_mannes/32/220485_2.png) [@yolhan\_mannes](https://discourse.julialang.org/u/yolhan_mannes)\
**Post date:** [October 30, 2026, 10:01pm UTC](https://discourse.julialang.org/t/using-ordinarydiffeq-jl-as-a-native-ode-solver-library-from-rust-with-juliac-trim/140333/8 "2026-10-30T22:01:04Z")

</div>

yes, basically at the end you have

```bash
yolhan@Mac testrs % ls lib  
julia libjulia.1.14.0.dylib libjulia.1.14.dylib libjulia.dylib ssplib.dylib
yolhan@Mac testrs % ls share
julia
yolhan@Mac testrs % ls share/julia
cert.pem
yolhan@Mac testrs % ls lib/julia  
libatomic.1.dylib libgmp.dylib libopenblas64_.dylib libstdc++.6.dylib
libatomic.dylib libgomp.1.dylib libopenlibm.4.0.dylib libstdc++.dylib
libblastrampoline.5.16.0.dylib libgomp.dylib libopenlibm.4.dylib libunwind.1.0.dylib
libblastrampoline.5.dylib libjulia-internal.1.14.0.dylib libopenlibm.dylib libunwind.1.dylib
libblastrampoline.dylib libjulia-internal.1.14.dylib libpcre2-8.0.dylib libunwind.dylib
libdSFMT.dylib libjulia-internal.dylib libpcre2-8.dylib libz.1.3.2.dylib
libgcc_s.1.1.dylib libmpfr.6.dylib libquadmath.0.dylib libz.1.dylib
libgfortran.5.dylib libmpfr.dylib libquadmath.dylib libz.dylib
libgfortran.dylib libopenblas64_.0.3.34.dylib libssp.0.dylib libzstd.1.dylib
libgmp.10.dylib libopenblas64_.0.dylib libssp.dylib libzstd.dylib

```

its a lot less than full julia (without --trim) but some can still be remove like all the libblas basically which for now JuliaC doesn’t know how to proove its not used.

```julia-auto
yolhan@Mac testrs % du -sh ./lib/julia/*
108K ./lib/julia/libatomic.1.dylib
  0B ./lib/julia/libatomic.dylib
  0B ./lib/julia/libblastrampoline.5.16.0.dylib
2,5M ./lib/julia/libblastrampoline.5.dylib
  0B ./lib/julia/libblastrampoline.dylib
 68K ./lib/julia/libdSFMT.dylib
176K ./lib/julia/libgcc_s.1.1.dylib
2,1M ./lib/julia/libgfortran.5.dylib
  0B ./lib/julia/libgfortran.dylib
492K ./lib/julia/libgmp.10.dylib
  0B ./lib/julia/libgmp.dylib
444K ./lib/julia/libgomp.1.dylib
  0B ./lib/julia/libgomp.dylib
3,3M ./lib/julia/libjulia-internal.1.14.0.dylib
  0B ./lib/julia/libjulia-internal.1.14.dylib
  0B ./lib/julia/libjulia-internal.dylib
528K ./lib/julia/libmpfr.6.dylib
  0B ./lib/julia/libmpfr.dylib
 11M ./lib/julia/libopenblas64_.0.3.34.dylib
  0B ./lib/julia/libopenblas64_.0.dylib
  0B ./lib/julia/libopenblas64_.dylib
176K ./lib/julia/libopenlibm.4.0.dylib
  0B ./lib/julia/libopenlibm.4.dylib
  0B ./lib/julia/libopenlibm.dylib
844K ./lib/julia/libpcre2-8.0.dylib
  0B ./lib/julia/libpcre2-8.dylib
356K ./lib/julia/libquadmath.0.dylib
  0B ./lib/julia/libquadmath.dylib
 72K ./lib/julia/libssp.0.dylib
  0B ./lib/julia/libssp.dylib
3,7M ./lib/julia/libstdc++.6.dylib
  0B ./lib/julia/libstdc++.dylib
 92K ./lib/julia/libunwind.1.0.dylib
  0B ./lib/julia/libunwind.1.dylib
  0B ./lib/julia/libunwind.dylib
172K ./lib/julia/libz.1.3.2.dylib
  0B ./lib/julia/libz.1.dylib
  0B ./lib/julia/libz.dylib
768K ./lib/julia/libzstd.1.dylib
  0B ./lib/julia/libzstd.dylib

```

and thats like half the size of the final lib.  
And yes its pretty cool we can make “small” standalone dylib from julia and call it anywhere.

I did fortran here too with and without trimming and with Deep learning packages [Embedding Julia code in Fortran - #14 by yolhan\_mannes](https://discourse.julialang.org/t/embedding-julia-code-in-fortran/96010/14)

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