RCalc GDExtension

This repository contains the required components to build the GDExtension that powers RCalc-GD, the editor plugin for Godot.

Building

In order to build this GDExtension, you will need staticlib builds of RCalc.

To obtain these staticlib builds, follow these steps:

1. Clone the RCalc repository and make sure to init + update its submodules.

2. Inside the RCalc root, run scons build_type=staticlib to generate a debug library, and scons build_type=staticlib target=release to generate a release library. More instructions on building RCalc can be found on its wiki.

3. The output of the staticlib builds are zip files named lib_rclac.{platform}.{target}.{arch}.zip. Extract both of these to vendor/librcalc/ in the rcalc-gdextension root. You should have vendor/librcalc/include/... and vendor/librcalc/lib/...

4. From the rcalc-gdextension root, run scons target=template_debug to generate a debug gdextension, and scons target=template_release to generate a release gdextension. These output files can be found in bin/, and should be copied into addons/rcalc_gd/bin/ inside the RCalc-GD root.

The following files are expected to exist in the vendor/librcalc/lib directory:

Platform	target=template_debug	target=template_release
Linux	librcalc.linux.debug.x86_64.a	librcalc.linux.release.x86_64.a
MacOS	librcalc.macos.debug.universal.a	librcalc.macos.release.universal.a
Windows	librcalc.win.debug.x86_64.mingw.a	librcalc.win.release.x86_64.mingw.a

Note than on MacOS, libraries are expected to be universal binaries containing both x86_64 and arm64 code. Build all four variants of the RCalc staticlib, and use lipo to create the universal binaries. For quick testing, you can also just rename the libraries, but the resulting GDExtension will only run on your architecture.

Note that on Windows, the staticlib is required to be built using MinGW (scons use_mingw=yes). MSVC builds of the staticlib are incompatible with the godot-cpp library due to differences in build configuration. Namely, Godot uses the release C runtime in debug builds, while RCalc uses the debug C runtime in debug builds, which improves debugging but is not redistributable. for this reason, only MinGW is supported for RCalc-GD.