Building FastRTPS fails, because of an error in foonathan_memory_vendor when cross-compiling for armhf [closed]

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When I try to cross-compile the current master version of ROS2 (eloquent freeze tomorrow) for armhf, I get the following error:

--- stderr: foonathan_memory_vendor
Cloning into 'foo_mem-ext'...
Already on 'master'
Submodule 'cmake/comp' (https://github.com/foonathan/compatibility.git) registered for path 'cmake/comp'
Cloning into '/ros2_ws/build/foonathan_memory_vendor/foo_mem-ext-prefix/src/foo_mem-ext/cmake/comp'...
CMake Warning at src/CMakeLists.txt:86 (message):
  cannot generate container_node_sizes_impl.hpp, node size information will
  be unavailable

Which would not be too bad, except for the fact that FastRTPS needs the node size

--- stderr: fastrtps
In file included from /ros2_ws/src/eProsima/Fast-RTPS/src/cpp/rtps/reader/WriterProxy.h:32,
                 from /ros2_ws/src/eProsima/Fast-RTPS/src/cpp/rtps/reader/WriterProxy.cpp:22:
/ros2_ws/install/include/foonathan_memory/foonathan/memory/container.hpp:376:31: error: expected template-name before ‘<’ token
         : shared_ptr_node_size<T, std_allocator<T, RawAllocator, Mutex>>
                               ^
      ... etc etc. 
make[2]: *** [src/cpp/CMakeFiles/fastrtps.dir/build.make:388: src/cpp/CMakeFiles/fastrtps.dir/rtps/reader/WriterProxy.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:987: src/cpp/CMakeFiles/fastrtps.dir/all] Error 2
make: *** [Makefile:163: all] Error 2
---
Failed   <<< fastrtps   [ Exited with code 2 ]

thus this breaks my install. The above error occurs when I build on top of debian:buster with the following CMake toolchain:

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)

set(CMAKE_C_COMPILER arm-linux-gnueabihf-gcc)
set(CMAKE_CXX_COMPILER arm-linux-gnueabihf-g++)

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-psabi")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-psabi")

set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

set(PYTHON_SOABI cpython-37m-arm-linux-gnueabihf)

set(THREADS_PTHREAD_ARG "0" CACHE STRING "Result from TRY_RUN" FORCE)

The build does succeed when I cross-compile Dashing (no foonathan_memory_vendor there yet). I also made a dockerfile that builds master (eloquent) on top of Ubuntu 18.04 and that worked fine, which makes me think this is a master (eloquent) armhf cross-compile issue only.

Does anyone else run into this problem (and did you manage to fix this)? I am also OK with using a work-around for the time being. If I can somehow manually provide container_node_sizes_impl.hpp or provide foonathan_memory in some other way to the image, I can at least do some tests, until this issue is resolved.

I am aware that the foonathan_memory_vendor is actually the responsibility of eProsima, but because FastRTPS is the default ROS2 DDS vendor I assumed it was ok to ask this here.

If I am supposed to contact eProsima directly, please let me know how and where to do this.