They allow to piggy-back on wasm-vips build script to just build & install libvips itself, optionally with C++ bindings, in the designated sysroot.
I understand it might be not very interesting for wasm-vips itself, since this explicitly disables bindings, but it allows to more easily reuse a WebAssembly build of libvips in other projects.
These are some of my last custom patches.
They allow to piggy-back on wasm-vips build script to just build & install libvips itself, optionally with C++ bindings, in the designated sysroot.
I understand it might be not very interesting for wasm-vips itself, since this explicitly disables bindings, but it allows to more easily reuse a WebAssembly build of libvips in other projects.