bew/hello-world-crystal-nostd-sharedlib

Baby experiment to build a shared library with crystal code

Crystal

'Hello world' crystal shared library experiment

This is a baby experiment on LLVM compilation, to build a shared library from crystal source code

Simple Crystal code, with an empty prelude

Description

The generated library will exit the current process with error code 42.

Run the test

$ cd ./simple_no_prelude

Build the tester run_shared (written in C)
```
$ make run_shared
```
Build the shared library hello_llvm.so (written in Crystal, without stdlib)
```
$ make hello_llvm.so
```
Finally, run the binary run_shared, this will open the hello_llvm.so shared library, locate a function named crystal_do_something, then run it.
```
$ ./run_shared
$ echo $?
42
```