# leptonica-sys
Rust FFI bindings to [Leptonica](http://www.leptonica.org/).
Types and functions generated from the functions listed in
[allheaders.h](https://github.com/DanBloomberg/leptonica/blob/master/src/allheaders.h).
## Building
This links to the C library Leptonica.
On Fedora 30 the build dependencies can be installed by running:
```bash
sudo dnf install leptonica-devel clang
```
On Termux 2019 (Android, Android on Chromebooks) the additional dependencies can be installed by running:
```bash
pkg install libclang leptonica-dev
```
### Building on Windows
On Windows, this library uses Microsoft's [vcpkg](https://github.com/microsoft/vcpkg) to provide leptonica.
Please install [vcpkg](https://github.com/microsoft/vcpkg) and **set up user wide integration** or [vcpkg crate](https://crates.io/crates/vcpkg) won't be able to find the library.
By default vcpkg installs 32 bit libraries. If you need 64 bit libraries then set following environment variable
```cmd
SET VCPKG_DEFAULT_TRIPLET=x64-windows
```
To install leptonica
```cmd
REM from the vcpkg directory
.\vcpkg install leptonica
```
vcpkg allows building either dynamically or statically linked application
if you prefer dynamic linking
```cmd
SET VCPKGRS_DYNAMIC=true
```
for statically linked libraries
```cmd
SET RUSTFLAGS=-Ctarget-feature=+crt-static
```
