Rpi32: increase a bit footprints (#35)

- now builds and runs on RPi 4, Raspean bookworm
- latest libcypal

libcyphal_demo/CMakeLists.txt

@@ -21,6 +21,10 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "GN
         list(APPEND CXX_FLAG_SET "-fno-exceptions")
     endif()
 endif()
+if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    # Disable PSABI warnings in GCC (on RPi).
+    list(APPEND CXX_FLAG_SET "-Wno-psabi")
+endif()
 
 add_compile_options("$<$<COMPILE_LANGUAGE:CXX>:${CXX_FLAG_SET}>")
 

libcyphal_demo/src/application.hpp

@@ -44,10 +44,10 @@ class Application final
         /// Defines the footprint size of the type-erased register.
         /// The Footprint size is passed to internal unbounded variant
         /// which in turn should be big enough to store any register implementation.
-        /// `12`-pointer size is a trade-off between memory usage and flexibility of what could be stored.
+        /// 128 bytes size is a trade-off between memory usage and flexibility of what could be stored.
         /// Increase this value if you need to store more complex data (like more "big" register's lambdas).
         ///
-        static constexpr std::size_t RegisterFootprint = sizeof(void*) * 12;
+        static constexpr std::size_t RegisterFootprint = 128;
 
         /// Defines general purpose string parameter exposed as mutable register.
         ///