If you get a “dyld: Symbol not found: __NSConcreteGlobalBlock” error when running on iOS 3.X, you can fix this by adding -weak_library /usr/lib/libSystem.B.dylib to the extra linker command line in the project settings. (Not a Proton issue, but here just in case you need it)
Proton.cmakemodule available that can be used. Just select the parts that are needed. See Compiling the examples for Linux, the examples'
CMakeLists.txtfiles and the comments in the