Apache NuttX-10.2.0 Release Notes
What’s new in this release
Major Changes to Core OS
New Features
- #3708 openamp: Update to 2020.10.0 official release
- #3709 Update libcxx to 12.0.0 release
- #3674 libc/termios: Implement TCSADRAIN and TCSAFLUSH for tcsetattr
- #4595 libc/misc: add lib_glob
- #4594 libc/string: add lib_strchrnul
- #3672 include/spawn.h: Add POSIX_SPAWN_SETSID definition
- #4265 libc: Support message catalog function
- #3102 mm/iob: add iob_free_queue() interface
- #3893 libs/libc/netdb: add dns clear interface
- #3959 libc/time: Implement timegm function
- #3963 libc/sched: Implement nice API
- #3977 sched: Add kthread_create_with_stack
- #4016 Add heap & stack check to idle thread
- #4114 libc/math: Add fmax and fmin functions
- #4130 sys/poll: add POLLRDHUP definition
- #4262 libc: Add the empty nl_langinfo implementation
- #4272 libc: Implement gettext function
- #4432 libc:machine: add atomic_load/store/exchange API
- #4438 uClibcxx: add weak attribute for new/del ops
- #3681 libc: Implement openpty function
- #4363 sched/backtrace: add sched_backtrace support
- #4374 libxx: add new low level c++ standard library support
- #4425 libc: add common machine atomic operation
- #3687 libc/pwd: Add NSS_BUFLEN_PASSWD macro
- #3970 libc: Implement fesetround & fegetround for arm
- #4104 sched/clock: add nsec range check in clock_settime
- #4518 getaddrinfo: support AF_LOCAL and AF_RPMSG
- #4595 libc/misc: add lib_glob
- #3985 mmap: Implement the minial but reasonable mlock/munlock/mprotect
- #4065 mm: Add kmm_malloc_size and mm_malloc_size
- #4096 mm: Simplify the semaphore handling
- #4100 Implement utime and futimes
Bug Fixes
- #4615 sched/signal: Correct kill with cancellation
- #4619 sched: Fix CPU affinity issues in SMP
- #3626 libc: Move pthread stuff to userspace
- #3673 libc/pty: Make ptsname[_r] support PSEUDOTERM_BSD config too
- #4599 sched:tcb_s:rearrange sched_priority/int_priority to word align
- #3747 mm:initialize ensure alignment.
- #3962 sched/task/task_spawn.c: initialize variables explicitly
- #3916 sched/posix_spawn: Don’t insert name at the begin of argv
- #3858 tls: Move pthread key destructor to libc
- #3719 group/group_signal: cancel dispatch signal when child process doesn’t exist
- #4453 libs/libxx: Enforce RTTI for building libcxxabi
- #4450 libxx:uClibc++: disable new_handler.cpp when use libsupc++
- #4456 libc/gettext: Initialize path field when creating mofile struct.
- #4466 sched/wdog/wd_start.c: prevent accessing watch-dog lag if head is NULL
- #4499 uClibc++:remove typeinfo.cpp that confict with libsupc++
- #3698 sched/task: Simplify the syscall handling of task_spawn
- #3813 syscall/syscall.csv: Correct ordering of entries
- #4020 SMP should depends on ARCH_INTERRUPTSTACK
- #3957 sched/wdog: Remove flags field from wdog_s to save memory
- #3967 libc/dirname: Handle the consecutive ‘/’ correctly
- #4018 libs/libc/spawn: fix posix_spawn_file_actions_adddup2 alloc size error
- #4009 Move aligned_alloc, posix_memalign and valloc from mm/umm to libs/libc/stdlib
- #4021 sched/waitpid: handle waitpid waitting tcb->group is NULL
- #4026 sched/idle: disable sched when idle call nx_bringup
- #4035 work_queue: schedule the work queue using the timer mechanism
- #4048 libc: Move pthread_key_destructor to task_info_s
- #4057 libs: libnx: nxfonts: Fix prefix of generated fonts data
- #4109 libc: Implement ttyname and ttyname_r
- #4115 libc/math: Fix calculation error of log function
- #4124 add #undef for some libc function
- #4125 libc/sysconf: Add MONOTONIC_CLOCK for consistency
- #4127 libc: Increase the function of crc8 to use custom polynomials
- #4160 group/child_status: Dynamically expand group child_status
- #4183 sched/task: Fix wrong return value from nxspawn_open()
- #4226 syslog: reslove crash because vmov.i32 instruction is not ready
- #4246 libc/pthread_barrierattr_destory.c: Destroy shouldn’t reinitialize the attributes
- #4270 tzset: avoid taking semaphore in interrupt for non-kernel mode
- #4413 sched/wdog: fix switch_context caused error in wd_start()
- #3703 sched/spawn: Support the stack address argument
- #4287 signal: Allow SIG_EVTHREAD selectable in protected mode
- #4296 sched: Fix crash on early syslog message with prepended process name
- #4368 libs/libxx/uClibc++.defs: Download the correct file type.
- #4369 libs/libxx: Download C++ libraries during context.
- #4382 sched/backtrace: simplify the assign of tcb in case of negative pid
- #4377 task_spawn: release g_spawn_parmsem and sched_unlock at the ending
- #4068 mm: Remove mm_heap_impl_s struct
- #4247 Redirect _l function to non-locale version
- #4380 som byteorder modification
- #4283 libc/gettext: Change g_domain to array
- #4512 lib_vsprintf: Add %pV format support
- #4513 libc/rexec/rexec_af: support remote command execution
- #4516 lib_fread: return the number of bytes actually read when error occurs.
- #4520 debug: allow customize EXTRA_FMT
- #3978 Decouple the initialization of the separate heaps from the TEXT_HEAP option.
- #4029 mm: fix memory corruption when loop create/exit thread in SMP mode
- #4055 mm: Move the real implementation of mm_sbrk to sbrk
- #4030 Fix procfs memory corruption when meet long string, add thread run time to procfs
- #4043 select: fix asan report error
- #4519 errno: use staic errno to replace tl_errno before tls initialization
- #3992 Refine tls_info_s and task_info_s
- #4019 Fix asan report error
- #4053 mm: Move procfs_register_meminfo into common place
- #4054 mm: Call memalign in malloc if ARCH_ADDRENV and BUILD_KERNEL are defined
- #4454 user/trap: Set MQ_MAXMSGSIZE to 64 to get NX working
- #3725 cmd/free: add nused/nfree field in command free
- #3753 libelf: fix “nsh: nsh_session: readline failed: 13” error
- #3767 binfmt: Move argv copy into exec_module
- #3764 binfmt: Rename dump_module to binfmt_dumpmodule
- #4064 binfmt: Replace all nx_ API with file_ API
- #3928 binfmt: Handle argv/argv[0] == NULL correctly in exec_module
- #3867 TLS: Correct handling of returned error values.
- #4185 iob_trimhead: fix an integer truncation
- #4117 Dynamically extend Pidhash table
- #4186 libc: Implement times function
- #3908 crypto/random_pool.c: Correct indexing on void pointer
- #3817 audio: various fixes
Major Changes to the Build System
New Features
- #4525 mkromfsimg: Add optional rcS file path
- #4491 checkpatch.sh: add check gerrit Change-Id support
- #3716 tools: Add a bash completion script for the configure tool
- #3819 docker/linux: Add ESP32-S2 toolchain and binaries.
- #4203 tools: Add armv7-a support to nuttx-gdbinit
- #3705 docker: add ninja-build
Bug Fixes
- #4418 compiler.h: add __builtin_offsetof instead of offsetof
- #3815 tools/mksyscall: Fix build break of syscall instrumentation wrapper
- #4461 tools/ci: Minor improvements to CI build script
- #4492 tools/nxstyle: Fix the check tool incorrectly reported no alignment.
- #3710 tools/ci: Rename sim0x.dat to sim-0x.dat to align with arm-xx.dat
- #4455 makefile: let clean_context in distclean command
- #4423 board: Enable CONFIG_LIBCXXABI when CONFIG_LIBCXX is enabled
- #4196 tools: Fix nuttx-gdbinit
Architectural Support
New Architecture
MIPS
PIC32
- #4252 pic32mz: added support for PIC32MZ2048EFG MCU
Architectures with significant improvements
ARM
- #4522 arch/arm: Add ARCH_CORTEXM55 Kconfig for cortex-m55
- #3759 arm/v7-a/fpu: add VFP-v3 D32 support
- #4536 arch/arm: correct the function name from arm_getsp() to up_getsp()
- #4410 arch/arm/assert: enhance the assert dump
- #4409 arch/arm/cortex-m: add up_backtrace support
- #4405 arch/armv7: add up_backtrace support based on frame pointer
- #4385 arch/armv8-m: Update per the latest architecture reference manual
- #4354 arch/arm: correct the frame pointer register declare
- #4205 arm: add up_secure_irq support
- #4176 ARM: fix CPSR corruption after exception handling
- #4094 arch/armv7-a: Remove the special SMP SGI process
- #4451 arch: Replace ar, nm and ld with gcc-ar, gcc-nm and gcc
- #4343 arch/armv8-m: Add SAU support
- #4341 arch/arm: Add NVIC_FPCCR_XXX macro to avoid the hard code value
- #4279 arch/cortex-m: replace arm_switchcontext to c-style
- #4106 arm/setjmp.h:add c++ support
- #4013 arm: fix enable interrupt too earlier caused system crash
- #4483 Fix compilation of arm protected build
- #3879 arch: Rename xxx_getsp to up_getsp
- #4227 pwm: add option to break the loops when using multiple PWM channels
- #4261 EXC_SECURE and SECURE_STACK just can clear at TRUSTZONE_NONSECURE
CXD56XX
- #4557 arch: cxd56xx: Replace the critical section with spinlock in cxd56_serial.c
- #3743 arch: arm: cxd56xx: Update cxd56xx drivers
- #3845 Fix spresense with elf
LPC17XX_40XX
- #4072 lpc17xx: Added WDT driver.
- #4316 lpc17_40: Fixed I2C port sanity check.
- #4148 lpc17_40: style fix in WDT definitions.
- #4107 lpc17_40: Fixed progmem driver.
STM32
- #3761 ET-STM32 Stamp: An STM32F103RET6 target for NuttX
- #4350 arch/arm/src/stm32l4/Kconfig: add new STM32L4+ chip types
- #4310 arch/stm32: improvements for qencoder
- #3752 Use inttypes stm32fx i2c
- #4090 STM32G43XX Analog Comparator
- #3942 Changed the STM32 Analog Comparator driver.
- #3729 stm32 timers: Prefer GTIM macros and make this use more uniform.
- #4163 Files for pysimCoder
- #4151 Change DAC driver to support STM32G4 DAC
STM32L4
- #3668 arch/arm/src/stm32l4/hardware/stm32l4xrxx: pinmap alternative function for SPI2
- #4468 arch/arm/src/stm32l4: fix STM32L4+ option bytes memory address
- #4501 arch/arm/src/stm32l4: add control for Vddio2 independent I/Os supply valid
- #4469 arch/arm/src/stm32l4/stm32l4_flash.c: fix FLASH_CONFIG_I to use dual-bank access
STM32L5
S32K1XX
- #3850 UCANS32K146 add support for B revision
- #4493 Fix error in s32k118_pinmux.h
- #3795 S32K1XX LSPI Double word up to 64 bits support
IMX6
- #3777 arch: imx6: Add termios support to imx6
IMXRT
- #3988 arch/arm/src/imxrt/imxrt_flexpwm.c: fix mistake in submodules address offset
- #4431 i.MX RT: Changes to FlexCAN driver and Teensy 4.x CAN configuration
- #4285 arch/arm/src/imxrt/imxrt_flexpwm.c: Set LDOK bits after all channels are set
- #4138 i.MX RT: added support for Tickless OS
RP2040
- #4049 Raspipico smp
- #4251 raspberrypi-pico: add support for lcd_dev
- #4002 Kinetis Replace DMA with a proper eDMA driver and use it on SPI and Serial
RTL8720C
- #4076 AmebaZ2: Add soc src code
NRF52
STM32H7/STM32F7
- #4331 arch/arm/stm32h7: dma and serial: add TRBUFF flag.
- #4441 arch/arm/stm32f7/stm32_irq: Fix format strings
- #4098 stm32h7 Ethernet add yield and timeout to not hog CPU
- #3730 stm32h7 rcc: Sync h7x7xx and h7x3xx. Changes are relevant to both
- #3892 arch/arm/src/stm32h7: qspi use indirect write instead of indirect read
- #3728 stm32f7: Remove references to BOARD_ENABLE_USBOTG_HSULPI.
- #3731 stm32/stm32f7 tickless: Fix up_timer_getmask to be correct for the width of the timer.
- #3976 STM32F7 SDMMC fixes
- #3924 stm32h7 fix for adc to handle overrun and the DR’s fifo
Renesas
- #4230 renesas/rx65n: add long type for all PRI*PTR
- #3989 Renesas/RX added setjmp and placeholder ioctl
Risc-V
- #3770 Add support for PolarFire SoC and icicle board
- #3997 risc-v/bl602: update wifi firmware version
- #4381 arch/riscv/assert: enhance the assert dump
- #4367 riscv/backtrace: add up_backtrace support
- #4365 riscv/common: add CURRENT_REGS declare in RV32
- #4342 riscv/bl602: Fix that AP cannot be start when STA have been started.
- #4335 arch/bl602：Add bl602 os adapter layer
- #4145 risc-v/bl602: update wifi firmware and some fixup.
- #3849 risc-v/mpfs: irq fixes, more register defines and up_systemreset()
- #3984 risc-v/bl602: Support AP and STA as independent network interface device
- #3913 arch: k210: Fix stack coloring for the idle thread stack
- #3757 riscv: Add inline IRQ process functions
- #4041 risc-v/bl602: add efuse driver
- #4384 Mpfs core pwm
- #4507 various MPFS fixes
ESP32-C3
- #3853 arch/risc-v/esp32c3: add esp32c3_modtext to allow ELF loading
BL602
- #3784 risc-v/bl602: Add RTC driver
- #4607 Open ble controller adaptation code
Xtensa
- #4280 arch:xtensa: add new GNU toolchain for xtensa.
- #4478 arch: xtensa: add xtensa cache support
- #4547 arch:xtensa: add full bactrace support
- #4407 arch/xtensa/src/common: Use irq_spin APIs in modifyregXX
- #4403 Use driver-specific spinlock for ESP32 serial driver.
- #4458 arch:xtensa: add xtensa mpu support
- #3762 xtensa: #ifdef SYMBOL is always true if SYMBOL defined as 0
ESP32
- #4638 esp32xx_rom.ld: Strongly declare some of the libgcc.a functions that are ROM resident
- #4417 arch/esp32: Properly handle GPIO interrupt in SMP.
- #4234 espressif/esp32/esp32s2/esp32c3: Disable wdt on initialization.
X86_64
General changes
- #4233 board/ctrl: Add BOARDIOC_BOOT_IMAGE for booting a new application image
- #4191 Add BOARDCTL_SWITCH_BOOT to support switch boot system
- #4089 board/ctrl: add BOARDCTL_UNIQUEKEY support
## Simulator
- #3921 sim: Use cc as linker, which usually aliases to either GCC or Clang
- #4108 boards/sim: enable nxlooper for alsa config
- #4222 sim/cmdline: save boot cmdline
- #4209 Fix sim smp
- #4207 arch: sim: Workaround to make the IPI work on macOS
- #4167 arch/sim: The second CPU shouldn’t call up_irqinitialize
- #3904 boards/sim/sim/sim: correct LDLINKFLAGS after migrating from ld to gcc
- #4056 arch/sim: Fix bt and audio simulation stop work in SMP mode
- #4045 sim/smp: fix smp can’t start, caused by signal too busy
- #4015 modify sim clock to PC abs time
- #3983 arch/sim: Implement mm_mallinfo and malloc_size for the custom heap
- #4459 sim: Inhibit stack protector on stack coloration function
- #3721 sim/rptun: support multi(>2) core interactive by share memory
- #4306 boards/sim: Add smartfs profile example
- #4258 Use exit func iml host_abort.
- #3689 Apps Issue #246: Replace romdisk_register() with boardctl(BOARDIOC_ROMDISK)
- #4465 feature: driver: Add a Linux SPI into simulator.
Documentation
New Features
- #3634 Documentation/platforms: added documentation for imxrt10xx boards
- #4470 Doc: Add initial documentation to the simulator
- #4419 doc/esp32: Add instructions to use softap
### Improvements
- #3782 spi: Improve SPI Slave interface documentation
- #4390 Documentation: Update ESP32-C3 supported peripheral list.
- #3702 Documentation/esp32c3: Fix a couple of issues from #3700
- #4242 Documentation/bl602: Update some imformation
- #3662 Fix some issues on SPI documentation
- #4375 Documentation/esp32-wrover-kit: update the name of the GPIO interrupt device.
- #4298 Doc/FAQ: Add more entries about board initialization
- #3899 Documentation: Update kconfig-frontends install instructions
- #4235 Documentation/: Update ESP32 doc.
- #3802 Doc: Improve documentation to make clear about the priorities
- #4564 Doc: Update download version to 10.1 and fix tar command
- #3700 Convert ESP32-C3 README to the new Documentation
- #4298 Doc/FAQ: Add more entries about board initialization
- #4297 Documentation/FAQ: Why /dev/ttySx is not created
Driver Support
Bug Fixes
- #3842 Added automatic log rotation, when log file is opened.
- #3837 SYSLOG channel add functions return handle to the channel.
- #3848 Syslog file rotations number is configurable.
- #3808 Ramlog: recover last crash log from ram buffer.
- #4614 input/touch: add io command for touch firmware version
- #4632 feat: driver: support double buffer for display
- #4650 driver/power: using upper-half structure directly in the lower-half structure.
- #4370 drivers/sensors/bmp280.c: Correct bmp280 driver
- #4243 drivers/mmcsd:Send cmd0 just once for Increased compatibility
- #4231 adc: add ioctl command to get the number of configured channels
- #4007 driver/fakesensor: fix bugs.
- #4177 serial: use Ctrl+? composite key to force panic”
- #3851 spi: Refactor SPI Slave interface prefix to sync with I2C Slave
- #4095 drivers/syslog: Avoid prepending process name when no TCB is available
- #3990 drivers: wireless: Fix error handling in gs2200m_ioctl_send()
- #3860 drivers: serial: Remove an unnecessary critical section (cs) for SMP
- #3910 serial/pty: Initialize the terminal setting as a console
- #4110 bcm43xxx: supported IW_AUTH_CIPHER_NONE mode
- #4131 drivers/rptun: replace the notification mech from signal to semaphore
- #4132 serial: add ctrl+@ to force crash system for debugging
- #4156 Fakesensor: support gps by read nema csv and delete fakesensor init.
- #4225 sensor: directly return -ENOTSUP without the set_interval or batch
- #4228 drivers: wireless: Fix to set the address family for recvfrom() in gs2200m
- #4288 adc: add IOCTL commands ANIOC_RESET_FIFO and ANIOC_SAMPLES_ON_READ
- #4312 drivers/qencoder: add command to set the maximum encoder position
- #4652 driver/sensor: support sensor_ops: selftest
- #3633 drivers/serial: fix Rx interrupt enable for cdcacm
- #4504 add new interface for fb driver and lcd dev driver
- #4554 drivers/lcd: Add GC9A01 driver and refine ST7735
- #3658 drivers: move the generic upper-half motor driver
- #4397 Update lm3s6965
- #4489 drivers/mmcsd: Pass the right buffer size to SDIO_DMAPREFLIGHT
- #4479 drivers/sdmmc: Remove rwbuffer to avoid panic
- #4476 drivers/mmcsd: Change up_udelay to nxsig_usleep if delay >= 1ms
- #4474 drivers/mmcsd: Handle the failure correctly in mmcsd_slotinitialize
- #4473 drivers/mmcsd: Fix the wrong format argument in mmcsd_dmpcsd
- #3720 driver/syslog: add CONFIG_SYSLOG_RPMSG_SERVER_NAME
- #3864 Fix ht16k33 driver to support multi-modules
- #3828 syslog/emerg: fix bug about printing LOG_EMERG log from iob buffer
- #3806 syslog: fix bug about syslog_default_write
- #3936 syslog/ramlog: Remove the duplication of \n->\r\n conversion
- #3907 serial/pty: Don’t return -NOSYS if pollfd::events equals 0
- #3742 drivers/modem/altair: Fix behavior when a reset packet conflicts with a send packet
- #3741 drivers/mtd/smart.c: Recover the missing link of directory entry
- #3736 drivers/syslog: Remove emergstream implementation and caller
- #3726 rtc: add config RTC_RPMSG_SERVER, RTC_RPMSG_SERVER_NAME
- #4113 syslog/ramlog: optimize code and fix init issue
- #4111 syslog/intbuf: force output log when syslog interrupt buffer is full
- #4042 serial: add ioctl TIOCNOTTY
- #4034 syslog: add CPU id to system when open CONFIG_SMP
- #4032 syslog: fix crash when print localtime by syslog
- #3979 note: Move up_schednote.c to drivers/note folder
- #4475 drivers/mmcsd: Change mmsd_ prefix to mmcsd_ prefix
- #4415 Adds driver for msa301 sensore module
- #4420 sensor: fix the bug that lsm6dsl selftest is invalid in nuttx.
- #3787 drivers/spi: Add SPI Slave character device driver
- #4566 drivers/syslog: Call up_puts in syslog_default_write instad up_putc
- #4580 drivers/syslog: Ensure the buffer zero terminate
- #4302 Compile fixes in MCP23X17 driver.
- #4299 bchlib: Improve error handling
- #4345 mtd: Implement BIOC_PARTINFO for all drivers
- #4248 mtd: Return MTD Partition Information
- #4166 mtd: Add MTDIOC_ERASESTATE command for retrieving erase state value
- #3885 mtd: Add MTDIOC_FLUSH IOCTL like MTDIOC_XIPBASE
- #3722 lirc: fix bug about lirc_raw_event
- #4515 rptun: add CONFIG_RPTUN_LOADER to optimize code size
- #4223 rptun: optimize multi-core startup
- #4552 bcm43xxx: abrupt stall of receiving new credits from sdpcm header
- #4565 bcm43xxx: added SDPCM frame pool size parameter
- #4236 bcm43xxx: fixed issues with unaligned buffers for DMA transfers.
- #4567 lcd/st77xx: change 16 bit cmd send to 8 bit
- #4137 bluetooth: add more OGF definition
- #4039 Add putarea() method for st7789
- #3754 wireless/bluetooth: decoupling bt_driver_s and bt_buf_s
New Driver Support
- #3727 Add basic support for MCP23017 I/O Expander
- #3859 Add Holtek HT16K33 14-segment display driver
- #4641 drivers/mtd/m25px.c: add support for MT25Q256 SPI NOR
- #4606 Add support for MT25Q1G SPI NOR
- #4373 Add support for 3-phase Hall effect sensor driver
- #4490 add support for power management ic axp202
Board Support
New Board Support
Boards With Significant Improvements
ARM
CXD56
- #3833 Spresense new memorymap
- #4526 Rearch video
- #3973 boards: spresense: Update rndis and rndis_smp for workaround
- #3744 boards: cxd56xx: Update drivers on spresense board
IMX6
IMXRT
- #3982 boards/arm/imxrt/teensy-4.x: added board level support for GPIO driver
- #3929 Added encoder support for Teensy 4.x
- #3980 FlexPWM support for iMXRT MCU
- #4581 Fixed imxrt flexcan driver compilation error (incorrect variable scope)
LPC17XX_40XX
NRF52
RP2040
- #3917 arm/rp2040:USB device controller support
- #3857 boards: rp2040: Add user gpio driver
- #3996 Support for Waveshare Pico-LCD-1.x module
- #4086 Added PCF8574 backpack support to Raspberry Pi Pico
- #4204 added st7735 LCD based support
- #4289 Fixing BMP180 and INA219 in RP2040
S32K1XX
- #4643 S32K1xx arch: Add (optional) support for SPI native/hardware chip select
- #4634 S32K1XX arch: gpioread may also be used for output pins
- #4592 S32K1XX: Add LPI2C slave support
- #4541 S32K1XX EVB boards cleanup & update
- #4578 S32K1XXEVB boards: Fix RGB LED output and add comments
- #4533 S32k1xx: added PM support
- #4596 S32K1XX: Add FlexIO registers
- #4508 s32k1xx: added way to get the reset cause in a proc fs
- #4560 RDDRONE-UAVCAN / UCANS32K146 boards cleanup & update
SAM34
- #3732 board: Add support for Adafruit Circuit Express
- #3840 Add ST7789 LCD controller support for SAMV71 XPlained Ultra board
STM32
- #3944 boards/arm/stm32/nucleo-f446re: added support for DAC driver
- #3880 boards/arm/stm32/nucleo-f446re: added support for GPIO driver
- #3909 Added basic support for nucleo-g431kb board.
- #3922 Adds PWM example to nucleo-g431kb board.
- #3914 boards: added support for EMW3162 Wi-Fi board
- #3878 Add FOC support for B-G431-ESC1 board
- #3637 boards/arm/stm32/nucleo-f446re: added support for PWM
- #3660 stm32_pwm: improvements for PULSECOUNT support
- #4505 STM32 F4, F7, H7 USB OTG Device Ensure EP initialized to proper state on usb reset and configure
- #4589 Fix stm32xx GPIO glitches from configuration bad order of operations
- #4085 stm32,stm32f7,stm32h7: supported ETH MAC promiscuous mode
- #4255 STM32 DAC Driver - Add support to DAC3
- #3796 boards/arm/stm32/nucleo-f412zg/scripts/Make.defs: Replace EXTRADEFINES by EXTRAFLAGS
- #4284 stm32_pmw: fix pwm_stop() function to enable multiple PWM start and stop
- #4353 stm32/stm32_serial.c fix issue
- #4244 STM32G4: add support for CORDIC math accelerator
- #4437 stm32_serial.c: Don’t fake a TX interrupt when interrupts are not suppressed
- #3863 boards/arm/stm32/nucleo-f446re: fixed wrong qetimer config name
- #3952 SDIO IO_RW_EXTENDED command (CMD53) related fixes
- #4597 Add LCD backpack support for ESP32 (devkit-c).
STM32L4
- #4534 STM32L4 LPUART support
STM32F4
STM32F7 / STM32H7
* #3646 boards/stm32f7: Add i2c and mpu60x0 support to nucleo-144 and fix bitmask bug in mpu60x0
-
| #3650 stm32{H7 |
F7} Disables/Enabled the use of GPIO_OTG_ID pin |
-
| #3669 STM32 {F7 |
H7} Use 250 Ms Data path timeout, regardless of Card Clock frequency |
-
| #3651 Use inttypes in stm32{f7 |
h7}, Kinetis, s32k drivers. |
- #4524 stm32*7/stm32_serial.c: Don’t fake a TX interrupt when interrupts are not suppressed
- #4598 stm32h7:DMA_TRBUFF is DMA_SCR_TRBUFF
KINETIS
- #4190 kinetis lpserial add RX DMA
ARM
AVR32
- #3684 avr32dev1: USART1 RX: Reassign pin
MIPS
PIC32
- #4264 boards: added a basic support for chipKIT Wi-FIRE board
RISC-V
- #3846 risc-v/rv32m1: Basic port to rv32m1 ri5cy
- #4146 risc-v/bl602: add boardctl support
- #3911 Add i2c driver to PolarFire SoC and Icicle board
- #3905 Add SPI driver to PolarFire SoC and Icicle board
- #3933 riscv/mpfs: add i2c reset handler
- #3920 add dma support for PolarFire SoC
- #4569 MPFS emmcsd
BL602
- #4010 boards/bl602: Fix uart_nx.c:419: undefined reference to `uart_bth4_register
C906
ESP32-C3
- #3794 risc-v/esp32c3: Support ESP32-C3 RTC driver
- #3883 risc-v/esp32c3: Support ESP32-C3 RSA accelerator
- #3881 risc-v/esp32c3: Support ESP32-C3 efuse
- #3935 risc-v/esp32c3: Support ESP32-C3 SHA accelerator
- #3882 riscv/esp32c3: Use the RTC memory as another heap.
- #3945 boards/esp32c3: Add romfs configuration
- #3925 risc-v/esp32-c3: Adds I2C polled support
- #3823 risc-v/esp32-c3: Add support for HW flow control.
- #3822 ESP32-C3: Add DMA support for SPI Slave
- #3543 feat(esp32c3): Support esp32c3 ble function
- #3667 risc-v/esp32c3: Add ESP32-C3 (G)DMA driver and testing
- #4605 risc-v/esp32-c3: improvements and fix to esp32c3_rt_timer.c
- #4611 ESP32-C3: Add support for booting NuttX from MCUboot
- #3656 risc-v/esp32-c3: Adds freerun wrapper
- #4574 esp32c3-devkit: Add board profile to use LVGL on GC9A01 display
- #3810 risc-v/esp32c3: Fix overwriting of registered-but-disabled interrupts
- #3797 ESP32-C3: Add SPI Slave peripheral driver
- #4568 boards/esp32c3: add ESP32C3 LCD drivers
- #4553 risc-v/esp32c3: fix pwm driver bug
- #4500 risc-v/esp32-c3: refactor the Wi-Fi board logic.
- #3679 risc-v/esp32c3: Support ESP32-C3 PM standby and sleep
- #3766 riscv/esp32c3: Add ESP32-C3 AES driver
- #3750 riscv/esp32c3: Support SPI Flash encryption read/write
- #3735 riscv/esp32c3: Add ESP32-C3 ADC driver
- #3715 risc-v/esp32c3: Support ESP32-C3 auto-sleep
- #4239 risc-v/esp32-c3: Adds systimer support and make rt_timer rely on it
- #3694 risc-v/esp32c3: Add support for DMA transfers on SPI driver
- #3697 riscv/esp32c3: Fix RT timer issues
- #3906 risc-v/esp32c3_wifi_adapter.c: Remove a config that’s only used in Xtensa chips.
- #3701 riscv/esp32c3: Add ESP32C3 LEDC(PWM) driver
- #3854 ESP32-C3: Small clean up on IRQ functions
- #4006 risc-v/esp32c3: Notifies networking layer whether the carrier is available
- #3788 ESP32-C3: Fix configuration of TX Burst support for GDMA
- #4040 risc-v/esp32c3: Fix some ESP32-C3 BLE driver issues
- #4082 boards/esp32c3-devkit: Support mounting SPI Flash MTD to littleFS
- #4075 risc-v/esp32c3: Add board_ioctl and board_uniqueid
- #4092 risc-v/esp32c3: Use onexit to free thread private semaphore
- #3971 boards/riscv/esp32c3: Rename the iram_0_2 segment to irom_0_0 to avoid confusions.
- #4141 risc-v/esp32-c3: Use systimer 0 to RTOS TICK
- #3793 esp32&esp32c3/wifi: Support specific channel and bssid scan
- #4162 risc-v/esp32c3: Fix some ESP32-C3 Wi-Fi driver issues
- #4169 risc-v/esp32-c3: Makes output readable and rmv unnecessary var.
- #4314 risc-v/esp32-c3: Complete the support for RWDT
XTENSA
- #4590 [Xtensa/RISC-V] Remove FAR and CODE qualifiers from arch-specific files
- #4187 Fix xtensa_btdump() to look at the exception frame
- #4556 xtensa:backtrace: flush to stack when in interrupt
- #3939 Fix xtensa
- #4531 xtensa/irq.h: Fixes the routine that clears the processor interrupt
- #4278 xtensa/common: save sp before overwriting in level2/3/4 handler and typo fix
- #4311 xtensa:coproc: fix XTENSA_CP_ALLSET error in some case
- #3768 xtensa: Fixes names of architecture serial functions
ESP32
- #3940 xtensa/esp32: Support ESP32 RTC driver
- #4003 xtensa/esp32: Adds support for SERIAL_TXDMA.
- #3912 xtensa/esp32: Adds I2C polled support.
- #3803 Add support to ESP32-S2 and ESP32S2-SAOLA-1 Board
- #3824 xtensa/esp32-s2: Add support for serial HW flow control.
- #4604 xtensa/esp32: Enable build system to download or build binaries from source
- #3642 xtensa/esp32: several uart fixes
- #3648 tools/esp32/mk_qemu_img.sh: Refactor the dd commands.
- #4625 esp32-c3/esp32-s2: Fix the sequence of commands to set the alarm value on rt timer.
- #4610 ESP32-S2: Add support for booting NuttX from MCUboot
- #3678 xtensa/esp32: Support auto-sleep
- #4532 boards/esp32s2-saola-1: Add implementation for BOARDIOC_RESET interface
- #4275 xtensa/esp32: Keep track of the CPU where the interrupt was attached.
- #4295 xtensa/esp32: Enable boot from Espressif’s port of MCUboot
- #4315 xtensa/esp32: Fix issues on RWDT
- #4366 xtensa/esp32: Use IRQ to enable/disable interrupts
- #4427 esp32/ttgo_lora_esp32: Add support to SSD1306 OLED display
- #4388 esp32: Re-organize the interrupt handling process to correctly handle the SMP case
- #4401 xtensa/esp32-s2: Adds support to the timer driver
- #4545 esp32-wrover: Add support to LCD1602 with I2C Backpack
- #4587 xtensa/esp32-s2: Adds freerun timer wrapper
- #4139 xtensa/esp32: Fixes termios issue.
- #4586 xtensa/esp32-s2: Adds oneshot device driver support
- #4570 esp32_spiflash.c: Correctly disable APP’s CPU cache.
- #4509 esp32: Add initial support to Bluetooth Low Energy
- #4411 esp32/softap: Enable the WPA2 by default to ask user password
- #4412 boards/esp32: Add basic support to TTGO-LoRa-SX1276-ESP32
- #4585 xtensa/esp32-s2: Adds support to rt_timer and systimer to ESP32-S2.
- #4170 xtensa/esp32: Make output readable and rmv unnecessary var.
- #4195 esp32_allocateheap.c: Remove the amount reserved to himem from the heap.
- #4232 xtensa/esp32: Enable configuration of GPIO pad’s drive strength
- #4240 xtensa/esp32: expose SPI2 as a char driver
- #4253 xtensa/esp32: Enable the allocation of multiple SPI Flash partitions
- #4338 tools/esp32/Config.mk: Allow ESPTOOL_BINDIR to be omitted when flashing the board
- #3938 esp32&esp32c3/wifi: Fix the issues of Wi-Fi configuration being overwritten
- #3969 boards/esp32: Refactor the different linker scripts and delete old OpenOCD config files.
- #3975 xtensa/esp32: Fix RTC WDT deinitialization on start routine
- #3987 tools/esp32/backtrace.gdbscript: don’t modify registers
- #4001 xtensa/esp32: Support to select different clock source for RTC controller and close TODOs.
- #4073 xtensa/esp32: Fix uart 2 issue.
- #3800 arch/xtensa/esp32_emac.c: Call phy_enable_interrupt correctly.
- #4157 boards/esp32: Refactor the linker scripts into the common directory.
- #4249 xtensa/esp32-s2: Adds GPIO board logic to esp32s2-saola-1.
- #4471 xtensa/esp32: Wi-Fi board logic refactoring.
- #4497 esp32_serial.c: Don’t fake an interrupt when interrupts are not suppressed.
- #3829 xtensa/esp32: Fixes support for UART HW flow control
- #3943 xtensa/esp32: Adds I2C Bit banging reset
- #3960 xtensa/esp32: Refactor the text heap and add RTC memory to it
- #4646 Add example to use BLE and WiFi at same time
File System
Bug Fixes
- #3653 fs:cromf Use inttypes in printing macros
- #4573 fs:procfs: add waiting_paging_fill state names
- #3745 fs/vfs/fs_select.c: Fix select() to return EINVAL when nfds is negative
- #3740 fs/fat/fat32util.c: Fix calculation of current sector with invalid cl…
- #3724 fs/hostfs: fix bug about getting error file size by fstat
- #3785 FAT32 fix skipping sectors at computing the number of free clusters
- #4171 fs/tmpfs: Handle the tail ‘/’ correctly
- #4539 vfs/poll: correct the return event if inode has closed
- #3760 Fix calculation of free clusters at mounting a fat partition
- #4012 fs: move out nx_close from filelock
- #3974 fs/tmpfs: Fix the memory corruption when reallocate tmpfs_directory_s
- #3986 fs: nfs: Reconnect to the NFS server in TCP mode
- #4031 fs/fs_dup2: (sanity check )correct check before calling dup
- #4033 fs/procfs: add StackAlloc field for task stack info
- #4061 FAT32 kconfig entry to enforce computation of free clusters at mount
- #4079 fs/procfs: layout the output of meminfo correctly
- #4093 fs: Move the default ioctl handle from nx_vioctl to file_vioctl
- #4097 fs: Remove the inernal st_count field from struct stat
- #4101 fs: pseudorename should call inode_release in the error path
- #4118 fs: Support the root file system attributes(mode, uid, gid and time)
- #4119 fs: fstat shouldn’t follow the symbol link
- #4121 vfs: stat_recursive should return -ENOSYS if stat callback is NULL
- #4123 nuttx: littlefs_close should return value bugfix
- #4153 fs: Add fchstat and chstat callback into mountpt_operations
- #4165 fs: should only apply umask to the userspace caller
- #4174 Fix nfs and statfs
- #4193 fs: Change off_t and related types to int64_t if long long is supported
- #4224 fs/inode: add sanity check for inode to avoid nullpointer
- #4263 fs: Save umask to tls_task_s for non kernel mode only
- #4300 fs: Add utimens and lutimens
- #4307 fs/userfs: Support fchstat and chstat callback
- #4308 fs/unionfs: Support fchstat and chstat callback
- #4309 fs/nfs: Support fchstat and chstat callback
- #4330 fs/littlefs: improve littlefs flash block erase balance performance
-
| #4332 fs: Support 64bit in register_[block |
mtd]partition |
- #4333 fs/partition: Support BIOC_PARTINFO
- #4321 fs: Remove endsector from partition_info_s
- #3680 fs/eventfd: add EVENT_FD_POLL as a Kconfig dependency for EVENT_FD_NPOLLWAITERS
- #4514 fs/ioctl: using FIOC_FILEPATH instead of FIOC_FILENAME
- #4511 inode_getpath: correct get path whether path buffer is clean or not.
- #4276 Fix status register reading in ramtron_read()
- #4290 cmd/df: Fix the abnormal output after off_t change
- #4133 profs: Print StackAlloc by procfs_snprintf
Significant Improvements
Networking
Improvements
- #4538 sys/socket/scm: add more socket message control helper
- #4080 net/socket: add SO_SNDBUF support
- #4116 net: Add file_socket function
- #4135 net/rpmsg: add multi-iov support
- #4179 Update socket rpmsg
- #4355 net/rpmsg: add nonblock connect(2) support
- #4356 net/local: add nonblock connect(2) support
- #4357 net/tcp: add nonblock connect(2) support
- #4070 net/tcp: add window scale support
- #3926 net/inet: add support of FIONREAD
- #3896 net/local: add local_nextconn() helper
- #3961 net: Add if_nameindex and if_freenameindex API
- #4069 net/socket: add SO_RCVBUF support
-
| #4071 net/local: add AF_[UNIX |
LOCAL] socketpair support |
- #4540 net/local: add FIONSPACE support
- #4593 net/local: add socket message control support
Bug Fixes
- #4602 net/dup: only start tcp monitor on INET domain
- #4649 net: always compile listen.c and accept.c when enable CONFIG_NET
- #4603 [SECURITY]net/tcp: sanity check for the listen address
- #4579 net/devif/devif_callback.c: made the connection event list doubly linked
- #4433 net/devif/devif_callback.c: corrected the connection event list to work as FIFO instead of LIFO
- #3776 net/dev: link the net device as order of registration
- #3758 net/tcp/retransmit: recounter the ack counter during obtain newdata
- #3723 net: Forward socket option only when the socket type is usrsock
- #4480 net: utils: Remove critical section for SMP in net_lock.c
- #3707 Fix NFS over TCP
- #3818 tcp: recv window update improvement
- #3655 Attempt to fix race condition reported in issue #3647
- #3865 Fix tcp seq wrap around issues
- #3889 net/dns:fix unaligned access in dns query
- #3894 net/telnet: fix a potential busyloop if rxbuffer writes faster than read
- #3934 net/local: Remove all HAVE_LOCAL_POLL reference
- #3755 net/icmp: icmp bug fix and enhancement
- #3993 tcp_reset: Don’t copy the peer window
- #3994 tcp: always responds to keep-alive segments
- #3995 fix active close for CONFIG_NET_TCP_WRITE_BUFFERS
- #3999 some follow-up patches for the recent tcp readahead
- #4017 rpmsg_socket: fix rpmsg_socket_device_destroy() multi-access
- #4022 tcp_close: Fix a race with passive close
- #3966 net: Fix: left shift of 1 by 31 places cannot be represented in type long int
- #3948 TCP: simplify readahead
- #3114 usrsock/recv: guarantee all data is received before close
- #3756 net/tcp: set/get TCP_KEEPINTVL/IDLE value as BSD style
- #3895 net/accept: alloc the accept fd after accept success
- #3937 dns_recv_response: Fix IPv6 address in an ninfo()
- #4408 Fix up that local socket will be endless loop when write data size more than the fifo size.
- #4517 rpmsg_socket: add prefix “rpmsg-socket” for the name of rpmsg endpoint
- #4537 net/udp: fix buffer release handling on failed buffer alloc
- #4120 net/tcp: tcp_sendfile need restore the file location at the end
- #4134 net/tcp: only print the error when disable the TCP_NODELAY
- #4142 tcp_send_buffered: throttle IOB allocations for send
- #4159 tcp_send_buffered.c: Fix broken retransmit
- #4126 include/netinet: Add missing IP_TTL definition
- #4197 local/stream: remove preamble header in stream mode
- #4273 tcp: some fixes in snd_wnd processing
- #4293 tcp: make our sequence number a bit more monotonic
- #4257 Fix a few deadlock in tcp/iob
- #4480 net: utils: Remove critical section for SMP in net_lock.c
- #3919 tcp iob throttling related fixes
Security Issues Fixed In This Release
Compatibility Concerns
Changes to Kconfig
The names of some Kconfig settings have been changed to improve the naming consistency. Here is the list:
| Old |
New |
| LIB_BOARDCTL |
BOARDCTL |
| LIB_CRC64_FAST |
LIBC_CRC64_FAST |
| LIB_ENVPATH |
LIBC_ENVPATH |
| LIB_HEX2BIN |
LIBC_HEX2BIN |
| LIB_HOMEDIR |
LIBC_HOMEDIR |
| LIB_HOSTNAME |
LIBC_HOSTNAME |
| LIB_KBDCODEC |
LIBC_KBDCODEC |
| LIB_RAND_ORDER |
LIBC_RAND_ORDER |
| LIB_SLCDCODEC |
LIBC_SLCDCODEC |
| LIB_USRWORK |
LIBC_USRWORK |
| LIB_USRWORKPRIORITY |
LIBC_USRWORKPRIORITY |
| LIB_USRWORKSTACKSIZE |
LIBC_USRWORKSTACKSIZE |
| LIB_ZONEINFO |
LIBC_ZONEINFO |
| LIB_ZONEINFO_ROMFS |
LIBC_ZONEINFO_ROMFS |
When they appear in code, these identifiers begin with a CONFIG_* prefix (e.g., CONFIG_LIB_BOARDCTL is renamed to CONFIG_BOARDCTL).
All in-tree boards have been updated, but users who maintain their own out-of-tree boards will have to update all instances of these identifiers.
See PR-4266 https://github.com/apache/nuttx/pull/4266 and PR-4267 https://github.com/apache/nuttx/pull/4267 in the main NuttX repository.
See also PR-820 https://github.com/apache/nuttx-apps/pull/820 and PR-821 https://github.com/apache/nuttx-apps/pull/821 in the NuttX apps repository.
Changes to MTD subsystem
MTDIOC_XIPBASE, MTDIOC_FLUSH and MTDIOC_PARTINFO is removed and replace with BIOC_XIPBASE, BIOC_FLUSH and BIOC_PARTINFO:
- Simplify the general driver(e.g. partition, flt) implementation
- Reduce the confusion with the same IOCTL in the different layer
See PR-4325 https://github.com/apache/nuttx/pull/4325
Changes to Build System
LD Now Called Through GCC
When building NuttX with GCC toolchains, the linker is now called through $(CROSSDEV)gcc rather than $(CROSSDEV)ld. This requires all linker options to be prefixed with -Wl, (dash, capital W, lower-case L, comma). All boards in the NuttX tree have been updated, but any custom out-of-tree boards will need to apply this change in the relevant parts of their build scripts.
The reason for this change is that GNU Binutils 2.36.x has added new error checking on command line arguments. This has had the effect that the NuttX build suddenly broke on host OS distributions that updated to the 2.36.x release line. Reports included Arch, Manjaro, and Ubuntu. Other host OSes are likely to be affected as well.
Symptoms
Your toolchain and board are affected if you see errors from LD like:
arm-none-eabi-ld: Error: unable to disambiguate: -nostartfiles (did you mean --nostartfiles ?)
or (following this change in NuttX) errors from GCC like:
arm-none-eabi-gcc: error: unrecognized command line option '--gc-sections'; did you mean '--data-sections'?
What to change
The most common change expected to affect most boards:
Change:
NXFLATLDFLAGS1 = -r -d -warn-common
NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
to:
NXFLATLDFLAGS1 = -r -Wl,-d -Wl,-warn-common
NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -Wl,-no-check-sections
If doing a kernel build, you may need changes in your board’s kernel/Makefile like:
Change:
USER_LDFLAGS = --undefined=$(ENTRYPT) --entry=$(ENTRYPT) $(USER_LDSCRIPT)
to:
USER_LDFLAGS = -Wl,--undefined=$(ENTRYPT) -Wl,--entry=$(ENTRYPT) $(USER_LDSCRIPT) -nostartfiles -nodefaultlibs
Change:
$(Q) $(LD) -o $@ $(USER_LDFLAGS) $(USER_LIBPATHS) $(OBJS) --start-group $(USER_LDLIBS) --end-group $(USER_LIBGCC)
to:
$(Q) $(LD) -o $@ $(USER_LDFLAGS) $(USER_LIBPATHS) $(OBJS) -Wl,--start-group $(USER_LDLIBS) -Wl,--end-group $(USER_LIBGCC)
Depending on your board’s customized build scripts, you may need to look out for other make variables in your board’s Makefile or Make.defs.
Some variables to look for:
ARCHSCRIPTARCH_LIBSCCLINKFLAGSEXTRALINKCMDSLDELFFLAGSLDENDGROUPLDFLAGSLDLINKFLAGSLDMODULEFLAGSLDSTARTGROUPNXFLATLDFLAGS1NXFLATLDFLAGS2USER_LDFLAGS
Anything that executes LD, such as:
$(Q) $(LD) --entry=__start $(LDFLAGS) $(LIBPATHS) $(EXTRA_LIBPATHS) \
Anything that processes LD flags, such as:
$(LIBPATHS) "-(" $(LDLIBS) "-)" $(LDFLAGS) -Map="$(TOPDIR)$(DELIM)nuttx.map"
In general, any command line options destined for LD must be prefixed with -Wl, (dash, capital W, lower-case L, comma) since they are now being passed through GCC.
Examples
Change:
EXTRALINKCMDS += @$(TOPDIR)/syscall/syscall_wraps.ldcmd
to:
EXTRALINKCMDS += -Wl,@$(TOPDIR)/syscall/syscall_wraps.ldcmd
Change:
to:
LDFLAGS += -Wl,-gc-sections
Change:
$(LIBPATHS) "-(" $(LDLIBS) "-)" $(LDFLAGS) -Map="$(TOPDIR)$(DELIM)nuttx.map"
to:
$(LIBPATHS) "-(" $(LDLIBS) "-)" $(LDFLAGS) -Wl,-Map="$(TOPDIR)$(DELIM)nuttx.map"
Change:
NXFLATLDFLAGS1 = -r -d -warn-common
to:
NXFLATLDFLAGS1 = -r -Wl,-d -Wl,-warn-common
Change:
ifeq ($(CONFIG_CYGWIN_WINTOOL),y)
LDFLAGS += -Map="${shell cygpath -w $(TOPDIR)/nuttx.map}" --cref
else
LDFLAGS += -Map=$(TOPDIR)/nuttx.map --cref
endif
to:
ifeq ($(CONFIG_CYGWIN_WINTOOL),y)
LDFLAGS += -Wl,-Map="${shell cygpath -w $(TOPDIR)/nuttx.map}" -Wl,--cref
else
LDFLAGS += -Wl,-Map=$(TOPDIR)/nuttx.map -Wl,--cref
endif
Also, if you have assigned the LD variable, it would need to change as well:
Change:
to:
References
- Git commit # 45672c269db13f59bdaa417e564837e8bbb6c8c1 in the NuttX main repository:
- https://github.com/apache/nuttx/commit/45672c269db13f59bdaa417e564837e8bbb6c8c1
- PR-3836 in the NuttX main repository:
- https://github.com/apache/nuttx/pull/3836
- Issues 3209 and 3826 in the NuttX issue tracker:
- https://github.com/apache/nuttx/issues/3209
- https://github.com/apache/nuttx/issues/3826
- Description of the change on Binutils mailing list:
- https://sourceware.org/pipermail/binutils/2021-June/116826.html
- Description of -Wl,option in the GCC manual:
- https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html
Apache NuttX