FelipeMdeO opened a new issue, #17818: URL: https://github.com/apache/nuttx/issues/17818
### Description / Steps to reproduce the issue I used Nuttx Link as reference:https://nuttx.apache.org/docs/latest/guides/simulator.html#prerequisites-for-macos While building the NuttX simulator (sim) on macOS, the build fails due to missing POSIX timer types and APIs. The errors indicate that timer_t, timer_create(), timer_settime(), struct itimerspec, and TIMER_ABSTIME are not available in the macOS SDK. I tried build the project using Clang as toolchain, but without luck. ``` sim/posix/sim_hosttime.c:40:8: error: unknown type name 'timer_t'; did you mean 'time_t'? static timer_t g_timer; ^~~~~~~ sim/posix/sim_hosttime.c:64:10: error: call to undeclared function 'timer_create' return timer_create(CLOCK_MONOTONIC, &sigev, &g_timer); sim/posix/sim_hosttime.c:122:21: error: variable has incomplete type 'struct itimerspec' struct itimerspec tspec = sim/posix/sim_hosttime.c:134:10: error: call to undeclared function 'timer_settime' return timer_settime(g_timer, TIMER_ABSTIME, &tspec, NULL); sim/posix/sim_hosttime.c:134:33: error: use of undeclared identifier 'TIMER_ABSTIME' ``` @acassis do you know if anyone is using Mac to simulate and use Nuttx? Environment OS: macOS (reproducible with current macOS + Xcode CLT) Toolchain: Apple Clang Target: sim:nsh NuttX version: master ### On which OS does this issue occur? [OS: Mac] ### What is the version of your OS? MacOS 26.1 ### NuttX Version master ### Issue Architecture [Arch: simulator] ### Issue Area [Area: Build System] ### Host information file sysinfo.h not exists NuttX CFLAGS: --g\ -fomit-frame-pointer -fno-common -fvisibility=hidden -ffunction-sections -fdata-sections -Wall -Wstrict-prototypes -Wshadow -Wundef -Wno-attributes -Wno-unknown-pragmas -fno-pic -isystem /Users/felipemouradeoliveira/nuttx-space/nuttx/include -D__NuttX__ -DNDEBUG -U_AIX -U_WIN32 -U__APPLE__ -U__FreeBSD__ -U__NetBSD__ -U__linux__ -U__sun__ -U__unix__ -U__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ NuttX CXXFLAGS: --g\ -fomit-frame-pointer -fno-common -fvisibility=hidden -ffunction-sections -fdata-sections -Wall -Wshadow -Wundef -Wno-attributes -Wno-unknown-pragmas -nostdinc++ -fno-exceptions -fcheck-new -fno-rtti -fno-pic -isystem /Users/felipemouradeoliveira/nuttx-space/nuttx/include/cxx -isystem /Users/felipemouradeoliveira/nuttx-space/nuttx/include -D__NuttX__ -DNDEBUG -U_AIX -U_WIN32 -U__APPLE__ -U__FreeBSD__ -U__NetBSD__ -U__linux__ -U__sun__ -U__unix__ -U__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ NuttX LDFLAGS: -Wl-dead_strip NuttX configuration options: CONFIG_HOST_MACOS=y CONFIG_APPS_DIR=\../apps\ CONFIG_BASE_DEFCONFIG=\sim:nsh-dirty\ CONFIG_BUILD_FLAT=y CONFIG_OUTPUT_STRIP_PATHS=y CONFIG_ARCH_HAVE_SETJMP=y CONFIG_ARCH_SETJMP_H=y CONFIG_ARCH_NONE_DEBUG_H=y CONFIG_FORTIFY_SOURCE=0 CONFIG_NDEBUG=y CONFIG_DEBUG_ALERT=y CONFIG_DEBUG_FEATURES=y CONFIG_DEBUG_ERROR=y CONFIG_DEBUG_WARN=y CONFIG_DEBUG_INFO=y CONFIG_DEBUG_ASSERTIONS=y CONFIG_DEBUG_ASSERTIONS_EXPRESSION=y CONFIG_DEBUG_ASSERTIONS_FILENAME=y CONFIG_ARCH_HAVE_STACKCHECK=y CONFIG_STACKCHECK_MARGIN=-1 CONFIG_STACK_USAGE_WARNING=0 CONFIG_DEBUG_SYMBOLS=y CONFIG_DEBUG_SYMBOLS_LEVEL=\-g\ CONFIG_ARCH_HAVE_CUSTOMOPT=y CONFIG_DEBUG_NOOPT=y CONFIG_LTO_NONE=y CONFIG_DEBUG_OPT_UNUSED_SECTIONS=y CONFIG_DEBUG_LINK_MAP=y CONFIG_ARCH_SIM=y CONFIG_ARCH=\sim\ CONFIG_ARCH_CHIP=\sim\ CONFIG_HOST_ARM64=y CONFIG_SIM_TOOLCHAIN_CLANG=y CONFIG_SIM_WALLTIME_SLEEP=y CONFIG_SIM_LOOP_INTERVAL=10 CONFIG_SIM_STACKSIZE_ADJUSTMENT=65536 CONFIG_SIM_HOSTFS=y CONFIG_SIM_OFFLOAD_NUM_BUFFERS=2 CONFIG_SIM_OFFLOAD_BUFFER_NUMBYTES=32767 CONFIG_SIM_UART_DMA=y CONFIG_SIM_UART_NUMBER=0 CONFIG_SIM_CUSTOM_DATA_SECTION=\\ CONFIG_ARCH_TOOLCHAIN_GNU=y CONFIG_ARCH_TOOLCHAIN_CLANG=y CONFIG_ARCH_64BIT=y CONFIG_ARCH_HAVE_TEXT_HEAP=y CONFIG_ARCH_HAVE_MULTICPU=y CONFIG_ARCH_HAVE_FORK=y CONFIG_ARCH_HAVE_POWEROFF=y CONFIG_ARCH_HAVE_TESTSET=y CONFIG_ARCH_HAVE_RTC_SUBSECONDS=y CONFIG_ARCH_HAVE_SYSCALL_HOOKS=y CONFIG_ARCH_HAVE_BACKTRACE=y CONFIG_ARCH_HAVE_CPUINFO=y CONFIG_ARCH_CPUINFO_FREQ_KHZ=0 CONFIG_ARCH_HAVE_TCBINFO=y CONFIG_BOARD_LOOPSPERMSEC=0 CONFIG_BOOT_RUNFROMEXTSRAM=y CONFIG_RAM_START=0x0 CONFIG_RAM_SIZE=0 CONFIG_ARCH_BOARD_SIM=y CONFIG_ARCH_BOARD=\sim\ CONFIG_ARCH_HAVE_BUTTONS=y CONFIG_ARCH_HAVE_IRQBUTTONS=y CONFIG_BOARD_CRASHDUMP_NONE=y CONFIG_BOARDCTL=y CONFIG_BOARDCTL_POWEROFF=y CONFIG_BOARDCTL_MKRD=y CONFIG_BOARDCTL_APP_SYMTAB=y CONFIG_BOARD_MEMORY_RANGE=\\ CONFIG_DISABLE_OS_API=y CONFIG_ARCH_HAVE_TICKLESS=y CONFIG_USEC_PER_TICK=10000 CONFIG_TIMER_ADJUST_USEC=0 CONFIG_ARCH_HAVE_TIMEKEEPING=y CONFIG_START_YEAR=2008 CONFIG_START_MONTH=6 CONFIG_START_DAY=1 CONFIG_PREALLOC_TIMERS=8 CONFIG_IRQ_NWORKS=8 CONFIG_IRQ_WORK_SECTION=\\ CONFIG_IRQ_WORK_STACKSIZE=2048 CONFIG_INIT_ENTRY=y CONFIG_INIT_ARGS=\\ CONFIG_INIT_STACKSIZE=2048 CONFIG_INIT_PRIORITY=100 CONFIG_INIT_ENTRYPOINT=\nsh_main\ CONFIG_INIT_ENTRYNAME=\nsh_main\ CONFIG_ETC_ROMFS=y CONFIG_ETC_ROMFSMOUNTPT=\/etc\ CONFIG_ETC_ROMFSDEVNO=1 CONFIG_ETC_ROMFSSECTSIZE=64 CONFIG_ETC_FATDEVNO=2 CONFIG_ETC_FATSECTSIZE=512 CONFIG_ETC_FATNSECTORS=1024 CONFIG_ETC_FATMOUNTPT=\/tmp\ CONFIG_RR_INTERVAL=0 CONFIG_TASK_NAME_SIZE=31 CONFIG_SCHED_HAVE_PARENT=y CONFIG_SCHED_WAITPID=y CONFIG_PTHREAD_MUTEX_ROBUST=y CONFIG_PTHREAD_MUTEX_DEFAULT_PRIO_NONE=y CONFIG_SCHED_CPULOAD_NONE=y CONFIG_SCHED_CPULOAD_TICKSPERSEC=100 CONFIG_SCHED_PROFILE_TICKSPERSEC=1000 CONFIG_SCHED_STACK_RECORD=0 CONFIG_DEV_CONSOLE=y CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=8 CONFIG_FILE_STREAM=y CONFIG_SIG_PREALLOC_ACTIONS=4 CONFIG_SIG_ALLOC_ACTIONS=1 CONFIG_SIG_PREALLOC_IRQ_ACTIONS=8 CONFIG_PREALLOC_MQ_MSGS=8 CONFIG_PREALLOC_MQ_IRQ_MSGS=8 CONFIG_MQ_MAXMSGSIZE=32 CONFIG_SCHED_WORKQUEUE=y CONFIG_SCHED_HPWORK=y CONFIG_SCHED_HPNTHREADS=1 CONFIG_SCHED_HPWORKPRIORITY=224 CONFIG_SCHED_HPWORKSTACKSIZE=2048 CONFIG_DEFAULT_TASK_STACKSIZE=2048 CONFIG_IDLETHREAD_STACKSIZE=4096 CONFIG_PTHREAD_STACK_MIN=256 CONFIG_PTHREAD_STACK_DEFAULT=2048 CONFIG_PTHREAD_GUARDSIZE_DEFAULT=0 CONFIG_SCHED_BACKTRACE=y CONFIG_PID_INITIAL_COUNT=16 CONFIG_SCHED_EVENTS=y CONFIG_DEV_LOOP=y CONFIG_ONESHOT=y CONFIG_ONESHOT_COUNT=y CONFIG_ALARM_ARCH=y CONFIG_BCH=y CONFIG_BCH_BUFFER_ALIGNMENT=0 CONFIG_IOEXPANDER=y CONFIG_IOEXPANDER_DUMMY=y CONFIG_IOEXPANDER_DUMMY_INT_NCALLBACKS=4 CONFIG_IOEXPANDER_DUMMY_INT_POLLDELAY=500000 CONFIG_IOEXPANDER_INT_ENABLE=y CONFIG_IOEXPANDER_NPINS=16 CONFIG_DEV_GPIO=y CONFIG_DEV_GPIO_NPOLLWAITERS=1 CONFIG_DEV_GPIO_NSIGNALS=1 CONFIG_GPIO_LOWER_HALF=y CONFIG_GPIO_LOWER_HALF_INTTYPE=14 CONFIG_DEV_NULL=y CONFIG_DEV_ZERO=y CONFIG_DEV_OPTEE_NONE=y CONFIG_DRVR_MKRD=y CONFIG_PIPES=y CONFIG_DEV_PIPE_MAXSIZE=65535 CONFIG_DEV_PIPE_SIZE=1024 CONFIG_DEV_FIFO_SIZE=1024 CONFIG_DEV_PIPE_VFS_PATH=\/var/pipe\ CONFIG_DEV_PIPE_NPOLLWAITERS=4 CONFIG_ARCH_HAVE_SERIAL_TERMIOS=y CONFIG_SERIAL=y CONFIG_SERIAL_CONSOLE=y CONFIG_SERIAL_NPOLLWAITERS=4 CONFIG_SERIAL_IFLOWCONTROL=y CONFIG_SERIAL_TXDMA=y CONFIG_SERIAL_RXDMA=y CONFIG_SYSLOG=y CONFIG_SYSLOG_DEFAULT_MASK=0xff CONFIG_SYSLOG_CRLF=y CONFIG_SYSLOG_MAX_CHANNELS=1 CONFIG_SYSLOG_DEVPATH=\/dev/ttyS1\ CONFIG_SYSLOG_DEFAULT=y CONFIG_FS_NEPOLL_DESCRIPTORS=8 CONFIG_FS_LOCK_BUCKET_SIZE=0 CONFIG_PSEUDOFS_ATTRIBUTES=y CONFIG_PSEUDOFS_SOFTLINKS=y CONFIG_PSEUDOFS_FILE=y CONFIG_SENDFILE_BUFSIZE=512 CONFIG_FS_HEAPSIZE=0 CONFIG_FS_BACKTRACE=0 CONFIG_FS_MQUEUE_VFS_PATH=\/var/mqueue\ CONFIG_FS_MQUEUE_NPOLLWAITERS=4 CONFIG_FS_RAMMAP=y CONFIG_FS_ANONMAP=y CONFIG_FS_FAT=y CONFIG_FAT_LCNAMES=y CONFIG_FAT_LFN=y CONFIG_FAT_MAXFNAME=32 CONFIG_FAT_LFN_ALIAS_TRAILCHARS=0 CONFIG_FS_ROMFS=y CONFIG_FS_ROMFS_CACHE_NODE=y CONFIG_FS_ROMFS_CACHE_FILE_NSECTORS=1 CONFIG_FS_BINFS=y CONFIG_FS_PROCFS=y CONFIG_FS_HOSTFS=y CONFIG_NXFONTS_PACKEDMSFIRST=y CONFIG_MM_DEFAULT_MANAGER=y CONFIG_MM_DEFAULT_ALIGNMENT=8 CONFIG_MM_NODE_GUARDSIZE=0 CONFIG_MM_REGIONS=1 CONFIG_MM_MAP_COUNT_MAX=1024 CONFIG_MM_BACKTRACE=-1 CONFIG_MM_FREE_DELAYCOUNT_MAX=0 CONFIG_MM_HEAP_BIGGEST_COUNT=30 CONFIG_MM_HEAP_MEMPOOL_THRESHOLD=-1 CONFIG_PATH_INITIAL=\/bin\ CONFIG_BINFMT_ELF_RELOCATABLE=y CONFIG_STDIO_BUFFER_SIZE=64 CONFIG_STDIO_LINEBUFFER=y CONFIG_NUNGET_CHARS=2 CONFIG_LIBC_LONG_LONG=y CONFIG_LIBC_NUMBERED_ARGS=y CONFIG_LIBC_NL_ARGMAX=9 CONFIG_ARCH_LOWPUTC=y CONFIG_LIBC_RAND_ORDER=1 CONFIG_LIBC_HOMEDIR=\/\ CONFIG_LIBC_TMPDIR=\/tmp\ CONFIG_LIBC_MAX_TMPFILE=32 CONFIG_LIBC_MAX_EXITFUNS=1 CONFIG_LIBC_EXECFUNCS=y CONFIG_POSIX_SPAWN_DEFAULT_STACKSIZE=2048 CONFIG_LIBC_HOSTNAME=\\ CONFIG_LIBC_OPEN_MAX=256 CONFIG_NAME_MAX=32 CONFIG_PATH_MAX=256 CONFIG_LINE_MAX=80 CONFIG_LIBC_STRERROR_ERRNUM=y CONFIG_LIBC_STRSIGNAL=y CONFIG_LIBC_LOCALE=y CONFIG_LIBC_LOCALE_CATALOG=y CONFIG_LIBC_LOCALE_GETTEXT=y CONFIG_LIBC_LOCALE_PATH=\/etc/locale\ CONFIG_TLS_NELEM=0 CONFIG_TLS_TASK_NELEM=0 CONFIG_TLS_NCLEANUP=0 CONFIG_LIBC_GAISTRERROR_ERRNUM=y CONFIG_LIBC_ENVPATH=y CONFIG_LIBC_FTOK_VFS_PATH=\/var/ftok\ CONFIG_LIBC_MEMFD_ERROR=y CONFIG_LIBC_TEMPBUFFER=y CONFIG_LIBC_MAX_TEMPBUFFER=2 CONFIG_LIBC_TEMPBUFFER_MALLOC=y CONFIG_LIBC_BACKTRACE_BUFFSIZE=0 CONFIG_LIBC_MUTEX_BACKTRACE=0 CONFIG_BUILTIN=y CONFIG_STREAM_OUT_BUFFER_SIZE=64 CONFIG_STREAM_HEXDUMP_BUFFER_SIZE=128 CONFIG_STREAM_BASE64_BUFFER_SIZE=128 CONFIG_LIBC_INLINE_QUEUE=y CONFIG_LIBM_TOOLCHAIN=y CONFIG_HAVE_CXXINITIALIZE=y CONFIG_BUILTIN_TOOLCHAIN=y CONFIG_COVERAGE_NONE=y CONFIG_COVERAGE_DEFAULT_PREFIX_STRIP=\0\ CONFIG_COVERAGE_DEFAULT_PREFIX=\/data\ CONFIG_PROFILE_NONE=y CONFIG_EXAMPLES_GPIO=y CONFIG_EXAMPLES_GPIO_PROGNAME=\gpio\ CONFIG_EXAMPLES_GPIO_PRIORITY=100 CONFIG_EXAMPLES_GPIO_STACKSIZE=2048 CONFIG_EXAMPLES_HELLO=y CONFIG_EXAMPLES_HELLO_PROGNAME=\hello\ CONFIG_EXAMPLES_HELLO_PRIORITY=100 CONFIG_EXAMPLES_HELLO_STACKSIZE=2048 CONFIG_FSUTILS_MKFATFS=y CONFIG_MKFATFS_BUFFER_ALIGNMENT=0 CONFIG_NSH_LIBRARY=y CONFIG_NSH_PROMPT_STRING=\nsh> \ CONFIG_NSH_PROMPT_MAX=32 CONFIG_NSH_PROMPT_ENV=\PS1\ CONFIG_NSH_PROMPT_SUFFIX=\> \ CONFIG_NSH_READLINE=y CONFIG_NSH_QUOTE=y CONFIG_NSH_MAXARGUMENTS=7 CONFIG_NSH_ARGCAT=y CONFIG_NSH_NESTDEPTH=3 CONFIG_NSH_ALIAS=y CONFIG_NSH_ALIAS_MAX_AMOUNT=1 CONFIG_NSH_PIPELINE=y CONFIG_NSH_BUILTIN_APPS=y CONFIG_NSH_FILE_APPS=y CONFIG_NSH_DISABLE_DATE=y CONFIG_NSH_DISABLE_LOSMART=y CONFIG_NSH_DISABLE_LOMTD=y CONFIG_NSH_DISABLE_MB=y CONFIG_NSH_DISABLE_MH=y CONFIG_NSH_DISABLE_MW=y CONFIG_NSH_DISABLE_SHUTDOWN=y CONFIG_NSH_DISABLE_TIMEDATECTL=y CONFIG_NSH_CODECS_BUFSIZE=128 CONFIG_NSH_PROC_MOUNTPOINT=\/proc\ CONFIG_NSH_FILEIOSIZE=1024 CONFIG_NSH_SYSINITSCRIPT=\init.d/rc.sysinit\ CONFIG_NSH_INITSCRIPT=\init.d/rcS\ CONFIG_NSH_SCRIPT_REDIRECT_PATH=\\ CONFIG_NSH_CONSOLE=y CONFIG_NSH_ARCHINIT=y CONFIG_SYSTEM_DD=y CONFIG_SYSTEM_DD_PROGNAME=\dd\ CONFIG_SYSTEM_DD_PRIORITY=100 CONFIG_SYSTEM_DD_STACKSIZE=2048 CONFIG_SYSTEM_DD_STATS=y CONFIG_SYSTEM_DUMPSTACK=y CONFIG_SYSTEM_DUMPSTACK_STACKSIZE=2048 CONFIG_SYSTEM_DUMPSTACK_PRIORITY=100 CONFIG_SYSTEM_NSH=y CONFIG_SYSTEM_NSH_PRIORITY=100 CONFIG_SYSTEM_NSH_STACKSIZE=2048 CONFIG_SYSTEM_NSH_PROGNAME=\nsh\ CONFIG_SYSTEM_READLINE=y CONFIG_READLINE_HAVE_EXTMATCH=y CONFIG_READLINE_ECHO=y CONFIG_READLINE_TABCOMPLETION=y CONFIG_READLINE_MAX_BUILTINS=64 CONFIG_READLINE_MAX_EXTCMDS=64 CONFIG_TESTING_OSTEST=y CONFIG_TESTING_OSTEST_LOOPS=1 CONFIG_TESTING_OSTEST_STACKSIZE=8192 CONFIG_TESTING_OSTEST_NBARRIER_THREADS=8 CONFIG_TESTING_OSTEST_RR_RANGE=30000 CONFIG_TESTING_OSTEST_RR_RUNS=10 CONFIG_TESTING_OSTEST_WAITRESULT=y Host system OS: macOS 26.1 Darwin Felipes-Air 25.1.0 Darwin Kernel Version 25.1.0: Mon Oct 20 19:32:47 PDT 2025; root:xnu-12377.41.6~2/RELEASE_ARM64_T8103 arm64 arm Host system PATH: /Users/felipemouradeoliveira/toolchains/xpack-x86_64-elf-gcc-*/bin /Users/felipemouradeoliveira/Library/xpacks/@xpack-dev-tools/riscv-none-elf-gcc/15.2.0-1.1/.content/bin /usr/local/bin /System/Cryptexes/App/usr/bin /usr/bin /bin /usr/sbin /sbin /var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin /var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin /var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin /opt/pmk/env/global/bin /opt/homebrew/bin /Users/felipemouradeoliveira/Library/Python/3.9/bin /Users/felipemouradeoliveira/.local/bin /Users/felipemouradeoliveira/Library/Python/3.9/bin /Users/felipemouradeoliveira/.local/bin ### Verification - [x] I have verified before submitting the report. -- This is an automated message from the Apache Git Service. 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