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docs,tests: add project_with_c_code_2 (passing structs from C to V to C)

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Delyan Angelov
2020-10-20 17:38:29 +03:00
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@ -2413,6 +2413,8 @@ and tries to compile it to a .o file, then will use that.
This allows you to have C code, that is contained in a V module, so that its distribution is easier.
You can see a complete minimal example for using C code in a V wrapper module here:
[project_with_c_code](https://github.com/vlang/v/tree/master/vlib/v/tests/project_with_c_code).
Another example, demonstrating passing structs from C to V and back again:
[interoperate between C to V to C](https://github.com/vlang/v/tree/master/vlib/v/tests/project_with_c_code_2).
You can use `-cflags` to pass custom flags to the backend C compiler. You can also use `-cc` to change the default C backend compiler.
For example: `-cc gcc-9 -cflags -fsanitize=thread`.