trns1997 commented on issue #16775:
URL: https://github.com/apache/nuttx/issues/16775#issuecomment-3159869687
Hey @Barto22
Here is hopefully a step-by-step guide to build helloxx example which
compiles as expected on the stm32f4discovery board (I don’t have hardware to
test runtime).
Here’s what I did – hopefully these steps help you get a clean build:
### 1. Update the board configuration
Replace the contents of
`boards/arm/stm32/stm32f4discovery/configs/nsh/defconfig` with the following:
```
#
# This file is autogenerated: PLEASE DO NOT EDIT IT.
#
# You can use "make menuconfig" to make any modifications to the installed
.config file.
# You can then do "make savedefconfig" to generate a new defconfig file that
includes your
# modifications.
#
# CONFIG_ARCH_FPU is not set
# CONFIG_NSH_ARGCAT is not set
# CONFIG_NSH_CMDOPT_HEXDUMP is not set
CONFIG_ARCH="arm"
CONFIG_ARCH_BOARD="stm32f4discovery"
CONFIG_ARCH_BOARD_STM32F4_DISCOVERY=y
CONFIG_ARCH_BUTTONS=y
CONFIG_ARCH_CHIP="stm32"
CONFIG_ARCH_CHIP_STM32=y
CONFIG_ARCH_CHIP_STM32F407VG=y
CONFIG_ARCH_STACKDUMP=y
CONFIG_BOARD_LATE_INITIALIZE=y
CONFIG_BOARD_LOOPSPERMSEC=16717
CONFIG_BUILTIN=y
CONFIG_EXAMPLES_HELLO=y
CONFIG_FS_PROCFS=y
CONFIG_HAVE_CXX=y
CONFIG_HOST_WINDOWS=y
CONFIG_INIT_ENTRYPOINT="nsh_main"
CONFIG_INTELHEX_BINARY=y
CONFIG_LINE_MAX=64
CONFIG_MM_REGIONS=2
CONFIG_NSH_BUILTIN_APPS=y
CONFIG_NSH_FILEIOSIZE=512
CONFIG_NSH_READLINE=y
CONFIG_PREALLOC_TIMERS=4
CONFIG_RAM_SIZE=114688
CONFIG_RAM_START=0x20000000
CONFIG_RAW_BINARY=y
CONFIG_RR_INTERVAL=200
CONFIG_SCHED_WAITPID=y
CONFIG_START_DAY=6
CONFIG_START_MONTH=12
CONFIG_START_YEAR=2011
CONFIG_STM32_JTAG_SW_ENABLE=y
CONFIG_STM32_PWR=y
CONFIG_STM32_SPI1=y
CONFIG_STM32_USART2=y
CONFIG_SYSTEM_NSH=y
CONFIG_USART2_RXBUFSIZE=128
CONFIG_USART2_SERIAL_CONSOLE=y
CONFIG_USART2_TXBUFSIZE=128
CONFIG_CXX_EXCEPTION=y
CONFIG_CXX_RTTI=y
CONFIG_CXX_STANDARD="c++17"
CONFIG_LIBCXXTOOLCHAIN=y
CONFIG_TESTING_CXXTEST=y
CONFIG_EXAMPLES_HELLOXX=y
```
This config enables the build of the helloxx app and links the toolchain
builtin library.
### 2. Build commands
```
make distclean
./tools/configure.sh -l stm32f4discovery:nsh
make -j8
```
### 3. Expected output
You should see something similar to:
```
➜ nuttx git:(master) ✗ make -j8
Create version.h
LN: platform/board to /home/thomas/nuttxspace/apps/platform/dummy
Register: hello
Register: dd
Register: nsh
Register: sh
Register: helloxx
Register: cxxtest
CC: inode/fs_inodebasename.c chip/stm32_gpio.c:44:11: note: '#pragma
message: CONFIG_STM32_USE_LEGACY_PINMAP will be deprecated migrate board.h see
tools/stm32_pinmap_tool.py'
44 | # pragma message "CONFIG_STM32_USE_LEGACY_PINMAP will be deprecated
migrate board.h see tools/stm32_pinmap_tool.py"
| ^~~~~~~
CC: dirent/lib_opendir.c In file included from chip/stm32_flash.c:40:
chip/stm32f20xxf40xx_flash.c:53:4: warning: #warning "Default Flash
Configuration Used - See Override Flash Size Designator" [-Wcpp]
53 | # warning "Default Flash Configuration Used - See Override Flash
Size Designator"
| ^~~~~~~
LD: nuttx
arm-none-eabi-ld: warning: /home/thomas/nuttxspace/nuttx/nuttx has a LOAD
segment with RWX permissions
Memory region Used Size Region Size %age Used
flash: 130872 B 1 MB 12.48%
sram: 5800 B 112 KB 5.06%
CP: nuttx.hex
CP: nuttx.bin
```
### Notes
Couple notes though:
- I built this on Ubuntu 24.04 with gcc 13.3.0. Since you’re using gcc
14.3.1, some of your issues might be related to that newer toolchain. If
possible, try building with gcc 13.x to see if it resolves the conflicts.
- The config above sets C++17 as the standard. If you need C++20 features
(e.g., std::format, ranges), you’ll need to adjust and test accordingly — I
haven’t validated that yet.
Can you try these exact steps and see if it resolves your build errors?
And maybe @leducp might have other ideas on this matter, not sure if he had
the occasion to test out newer gcc versions and recent C++ features on nuttx?
If i have the time i might test it out one of these days out of curiosity :) .
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