X-Cube-AI and C++

[FFrai.1]

Hey Community,

did anyone run a X-Cube-AI project using C++ successfully?

I get undefined reference errors when adding X-Cube-AI via CubeMX to my perfectly running cpp project in CubeIDE.

steps to reproduce:

1. create new project with cubemx, specified as cpp!
2. rename generated main.c to main.cpp, convert project to cpp in CubeIDE
3. build an run works
4. add X-Cube-AI Application template via CubeMX
5. building project fails

make -j4 all 
arm-none-eabi-g++ -o "stm32_cubeai_apply_model.elf" @"objects.list"  -l:NetworkRuntime600_CM4_GCC.a -mcpu=cortex-m4 -T"C:\Users\[...]\stm32_cubeai_apply_model\STM32L475VGTX_FLASH.ld" -Wl,-Map="stm32_cubeai_apply_model.map" -Wl,--gc-sections -static -Wl,--start-group -l:NetworkRuntime600_CM4_GCC.a -Wl,--end-group -L../Middlewares/ST/AI/Lib --specs=nano.specs -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mthumb -Wl,--start-group -lc -lm -lstdc++ -lsupc++ -Wl,--end-group
c:\st\stm32cubeide_1.5.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: c:/st/stm32cubeide_1.5.0/stm32cubeide/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924/tools/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc_nano.a(lib_a-writer.o): in function `_write_r':
writer.c:(.text._write_r+0x10): undefined reference to `_write'
c:\st\stm32cubeide_1.5.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: c:/st/stm32cubeide_1.5.0/stm32cubeide/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924/tools/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc_nano.a(lib_a-closer.o): in function `_close_r':
closer.c:(.text._close_r+0xc): undefined reference to `_close'
c:\st\stm32cubeide_1.5.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: c:/st/stm32cubeide_1.5.0/stm32cubeide/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924/tools/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc_nano.a(lib_a-fstatr.o): in function `_fstat_r':
fstatr.c:(.text._fstat_r+0xe): undefined reference to `_fstat'
c:\st\stm32cubeide_1.5.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: c:/st/stm32cubeide_1.5.0/stm32cubeide/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924/tools/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc_nano.a(lib_a-isattyr.o): in function `_isatty_r':
isattyr.c:(.text._isatty_r+0xc): undefined reference to `_isatty'
c:\st\stm32cubeide_1.5.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: c:/st/stm32cubeide_1.5.0/stm32cubeide/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924/tools/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc_nano.a(lib_a-lseekr.o): in function `_lseek_r':
lseekr.c:(.text._lseek_r+0x10): undefined reference to `_lseek'
c:\st\stm32cubeide_1.5.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: c:/st/stm32cubeide_1.5.0/stm32cubeide/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924/tools/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc_nano.a(lib_a-readr.o): in function `_read_r':
readr.c:(.text._read_r+0x10): undefined reference to `_read'
collect2.exe: error: ld returned 1 exit status
make: *** [makefile:81: stm32_cubeai_apply_model.elf] Error 1
"make -j4 all" terminated with exit code 2. Build might be incomplete.

additional question when using cpp:

why does CubeMX generate a main.c although i specified the project as c++?

I always have to rename the newly generated main.c and copy the user code from the old main.cpp, is there a workaround?

Best regards,

Florens

[FFrai.1]

anyone? :)

[FFrai.1]

What could be the problem of g++ linking to libc_nano.a?