cross-compiling for QNX fails due to nodesize_dbg

[asobhy-qnx]

When building for QNX nodesize_dbg needs to execute on target and generate container_node_sizes_impl.hpp. Unfortunately the solution provided using the emulator in PR #60 does not work for QNX. A solution needs to be implemented in order to generate this file manually and provide it during build time.

After running nodesize_dbg on QNX on x86_64 and aarch64 and as well as comparing the output with one generated on a x86_64 linux, I have found that the generated header file is exactly the same across linux and QNX.

A conclusion was made by generating the file natively on the host by adding the following condition to

memory/src/CMakeLists.txt

Line 92 in 09b884c

else()

which allows the header file to be generated on the host platform as long as it is running linux. The file generated on windows was different so if the host is running a windows OS then this method is not going to work.

elseif(QNX) execute_process(COMMAND g++ -DVERSION="${FOONATHAN_MEMORY_VERSION_MAJOR}.${FOONATHAN_MEMORY_VERSION_MINOR}.${FOONATHAN_MEMORY_VERSION_PATCH}" -o ${PROJECT_SOURCE_DIR}/tool/nodesize_dbg ${PROJECT_SOURCE_DIR}/tool/node_size_debugger.cpp ) add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/container_node_sizes_impl.hpp COMMAND ${PROJECT_SOURCE_DIR}/tool/nodesize_dbg --code ${CMAKE_CURRENT_BINARY_DIR}/container_node_sizes_impl.hpp)