2a1d9a0285
@dselsam @kha I did not have to create a new shared library. The main limitation of this approach is that the new `extern` functions are only available in compile code. That is, we cannot use them with `#eval`.
26 lines
545 B
Markdown
26 lines
545 B
Markdown
Small project implemented using Lean and C++.
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The C++ file `myfuns.cpp` wraps a C++ object using an `lean_external_object`.
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The file `myfuns.cpp` exposes pure and effectful primitives.
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The file `main.lean` contains a small Lean program that uses the exported primitives.
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Build instructions
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=====
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The command
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```
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LEAN_ROOT=<your lean4 directory> make
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```
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creates the executable `out/test`.
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Example:
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```
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LEAN_ROOT=/Users/leonardodemoura/projects/lean4 make
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```
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The executable `out/test` should produce the output
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```
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30
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hello
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foobla
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world
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```
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