A (WIP) collection of portable, strict C99, single-header implementations of common libc extensions.

### How to

Include the header in every file needed as usual:

```
#include "<ext-func-name.h>"
```

In the file chosen for the function implementation:

```
#define <EXT-FUNC-NAME>_IMPLEMENTATION_
#include "<ext-func-name.h>"
```

By default, the header won't have any includes, change that with:

```
#define <EXT-FUNC-NAME>_INCLUDE_LIBC_
```

Or disable function override with:

```
#define HAVE_<EXT-FUNC-NAME>
```