Xiang Xiao

> Build now passes on Linux for sim. I will try to have a look at some board with protected/kernel build to complete that as well. > BTW, I think...

@v01d can you rearrange the patchset? So, we can review it more easier.

> My questions: > > 1. Where this `CROSSDEV` is defined? Here is the default value: https://github.com/apache/incubator-nuttx/blob/master/arch/risc-v/src/rv32im/Toolchain.defs#L56-L70 https://github.com/apache/incubator-nuttx/blob/master/arch/risc-v/src/rv64gc/Toolchain.defs#L58-L60 But you can overwrite in your Make.defs as needed: https://github.com/apache/incubator-nuttx/blob/master/boards/risc-v/rv32m1/rv32m1-vega/scripts/Make.defs#L25-L27

chmod etc: https://github.com/apache/incubator-nuttx/pull/4153 utimes etc: https://github.com/apache/incubator-nuttx/pull/4100

> We tried to port NuttX on a new SoC, and found an issue related to the FPU test. > > In the source files: https://github.com/apache/incubator-nuttx/blob/master/arch/risc-v/src/common/riscv_exception_common.S https://github.com/apache/incubator-nuttx/blob/master/arch/risc-v/src/common/riscv_macros.S > > We...

> I was talking about the current layout in general and not particularly about the FPU test. I believe that since we are lazily saving/restoring FPU state, it should not...

Nice diagram! > PR #6834 is trying to address this, however on system with mixed interfaces utilizing the NET stack & IOB. For example > > Interface MTU > Ethernet...

> > The special handle can be achieved before netdev pass IOB to TCP/IP stack in receiving direction. The similar thing can be done in the transmit direction too, why...

> Most of it can be done in the IRQ handler, but the reference that the TCP/UDP checksum was correct gets lost then, hence the need for callback. I guess...

@davids5 do you have some performance number from PX4 CMake compared with NuttX Makefile?