nuttx: Simulator export fails

I am trying to build my own app using the export target with the simulator. And I’ve run into few issues : To be clear, here’s the procedure I following :

1. ./tools/configure.sh sim:nsh
2. make export
3. tar -xf nuttx-export-12.4.0.tar.gz
4. My CMakeList.txt file :

cmake_minimum_required(VERSION 3.16)
project(test)
include(../nuttx-export-12.4.0/scripts/toolchain.cmake)
add_executable(test main.c)

1. cmake . && make and here’s the output ld: unrecognized option '-Wl,--gc-sections'

Indeed in the target.cmake of the export the LDFLAGS are : "-Wl,--gc-sections -Wl,-Ttext-segment=0x400000 -Wl,-Map=/home/nuttxspace/nuttx/nuttx.map")

Which can not work because we passing the -Wl argument directly to the linker… First issue.

1. To go further, I have just modified the target.cmake, removing the -Wl before the arguments. Then the linker returns this error : ld: read in flex scanner failed With some research, this error is a the way of the linker to say that it can’t read some arguments. Some tests showed me that the -T{LINKER_SCRIPT} argument (toolchain.cmake) was the culprit. Here’s the line where we set the LINKER_SCRIPT variable : set(LINKER_SCRIPT ${NUTTX_PATH}/scripts/${LDNAME}) Problem, in the target.cmake the ${LDNAME} is empty: set(LDNAME "") The LDNAME variable is set in the Export.mk file :

ifneq ($(ARCHSCRIPT),)
  LDPATH = $(call CONVERT_PATH,$(ARCHSCRIPT))
  LDNAME = ${notdir ${LDPATH}}
  LDDIR = ${dir ${LDPATH}}
endif

For now, I’ve stopped there the investigation, but I will go further in this. These errors make me think that the simulator export is bugged. What do you think ? Is it possible that it isn’t really used and it is now outdated ? Or is there something I’m doing wrong ? By the way, without the export, it works perfectly well (tested with nsh). ping @leducp