INSTALL: Building Plugins generic README.

Install build dependencies as described in the [manual](https://opencpn-manuals.github.io/main/AlternativeWorkflow/Local-Build.html) Then clone this repository, enter it and make rm -rf build; mkdir build; cd build.

A "normal" (not flatpak) tar.gz tarball which can be used by the new plugin installer available from OpenCPN 5.2.0 is built using:

$ cmake ..
$ make tarball

To build the flatpak tarball:

$ cmake ..
$ make flatpak

Historically, it has been possible to build legacy packages like an NSIS installer on Windows and .deb packages on Linux. This ability has been removed in the 5.6.0 cycle.

Building for Android

Builds for android requires an ndk installation and an updated cmake, see manual (above).

To build an android aarch64 tarball:

$ cmake -DCMAKE_TOOLCHAIN_FILE=cmake/android-aarch64-toolchain.cmake ..
$ make

To build an android armhf tarball

$ cmake -DCMAKE_TOOLCHAIN_FILE=cmake/android-armhf-toolchain.cmake ..
$ make

Building on windows (MSVC)

On windows, a different workflow is used:

> ..\buildwin\win_deps.bat
> cmake -T v141_xp -G "Visual Studio 15 2017" ^
       -DCMAKE_BUILD_TYPE=RelWithDebInfo  ..
> cmake --build . --target tarball --config RelWithDebInfo