https://github.com/apache/nuttx/pull/18957

nuttx-macos.log

➜  nuttx-github-metrics git:(main) $ cd /tmp
➜  /tmp $ mkdir 260525a
➜  /tmp $ cd 260525a
➜  260525a $ git clone https://github.com/toku-mac/nuttx --branch fix_cmake_sim_toolchain
Cloning into 'nuttx'...
remote: Enumerating objects: 909636, done.
remote: Counting objects: 100% (1339/1339), done.
remote: Compressing objects: 100% (541/541), done.
remote: Total 909636 (delta 955), reused 799 (delta 798), pack-reused 908297 (from 3)
Receiving objects: 100% (909636/909636), 367.18 MiB | 20.00 MiB/s, done.
Resolving deltas: 100% (710911/710911), done.
Updating files: 100% (25833/25833), done.
➜  260525a $ git clone https://github.com/apache/nuttx-apps apps
Cloning into 'apps'...
remote: Enumerating objects: 99863, done.
remote: Counting objects: 100% (12/12), done.
remote: Compressing objects: 100% (11/11), done.
remote: Total 99863 (delta 5), reused 1 (delta 1), pack-reused 99851 (from 1)
Receiving objects: 100% (99863/99863), 26.90 MiB | 9.79 MiB/s, done.
Resolving deltas: 100% (80667/80667), done.
➜  260525a $ cd nuttx

➜  nuttx git:(fix_cmake_sim_toolchain) $ cmake -S . -B build-debug -DBOARD_CONFIG=sim:nsh -GNinja -DCMAKE_MAKE_PROGRAM=/opt/homebrew/bin/ninja

-- NuttX Host Tools
-- CMake C compiler: AppleClang
-- CMake system name: Darwin
-- CMake host system processor: arm64
   TOOLS_DIR path is "/tmp/260525a/nuttx"
   HOST = Darwin
-- Configuring done (0.0s)
-- Generating done (0.0s)
-- Build files have been written to: /tmp/260525a/nuttx/build-debug/bin_host
-- The C compiler identification is AppleClang 17.0.0.17000013
-- The CXX compiler identification is AppleClang 17.0.0.17000013
-- The ASM compiler identification is AppleClang
-- Found assembler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- nuttx_add_subdirectory: Skipping cxx-oot-build
-- Configuring done (1.1s)
-- Generating done (0.4s)
-- Build files have been written to: /tmp/260525a/nuttx/build-debug
➜  nuttx git:(fix_cmake_sim_toolchain) $ printf "CONFIG_SYSTEM_TIME64=y
CONFIG_FS_LARGEFILE=y
CONFIG_TLS_NELEM=16
CONFIG_DEV_URANDOM=y
CONFIG_EXAMPLES_HELLO_RUST_CARGO=y
CONFIG_EXAMPLES_HELLO_RUST_CARGO_STACKSIZE=8192
" >> build-debug/.config
➜  nuttx git:(fix_cmake_sim_toolchain) $ cmake --build build-debug -t olddefconfig

[1/1] cd /tmp/260525a/nuttx && /opt/homebrew/Cellar/cmake/3.30...ake/3.30.1/bin/cmake -E touch /tmp/260525a/nuttx/CMakeLists.txt
/tmp/260525a/nuttx/build-debug/.config:1809: warning: FS_LARGEFILE (defined at fs/Kconfig:20) set more than once. Old value "n", new value "y".
/tmp/260525a/nuttx/build-debug/.config:1810: warning: TLS_NELEM (defined at libs/libc/tls/Kconfig:45) set more than once. Old value "0", new value "16".
/tmp/260525a/nuttx/build-debug/.config:1811: warning: DEV_URANDOM (defined at drivers/crypto/Kconfig:16) set more than once. Old value "n", new value "y".
/tmp/260525a/nuttx/build-debug/.config:1812: warning: EXAMPLES_HELLO_RUST_CARGO (defined at /tmp/260525a/apps/examples/rust/hello/Kconfig:6) set more than once. Old value "n", new value "y".
Loaded configuration '/tmp/260525a/nuttx/build-debug/.config'
Configuration saved to '/tmp/260525a/nuttx/build-debug/.config'

(nuttx) ➜  nuttx git:(fix_cmake_sim_toolchain) ✗ $ cmake --build build-debug                        

[0/2] Re-checking globbed directories...
[5/8] Linking C executable nuttx
ld: warning: -ld_classic is deprecated and will be removed in a future release
[6/8] Patching Mach-O init section type flags
FAILED: [code=1] arch/sim/src/sim/CMakeFiles/sim_patch_macho_initsection /tmp/260525a/nuttx/build-debug/arch/sim/src/sim/CMakeFiles/sim_patch_macho_initsection 
cd /tmp/260525a/nuttx/build-debug/arch/sim/src/sim && /opt/homebrew/Frameworks/Python.framework/Versions/3.13/bin/python3.13 /tmp/260525a/nuttx/arch/sim/src/sim/../patch_macho_initsection.py /tmp/260525a/nuttx/build-debug/nuttx
Error: lief is required. Install with: pip install lief
[7/8] Generating System.map
ninja: build stopped: subcommand failed.
(nuttx) ➜  nuttx git:(fix_cmake_sim_toolchain) ✗ $ ls build-debug 
CMakeCache.txt        bin_debug             defconfig             include_apps          openamp
CMakeFiles            bin_host              defconfig.orig        libs                  preapps
System.map            binfmt                drivers               luamod                sched
Users                 boards                dummy.c               mm                    syscall
apps                  build.ninja           empty.c               net                   targets
arch                  cmake_install.cmake   fs                    nuttx                 wamrmod
audio                 compile_commands.json graphics              nuttx.manifest        wireless
bin                   crypto                include               nuttx.rel
(nuttx) ➜  nuttx git:(fix_cmake_sim_toolchain) ✗ $ build-debug/nuttx 

NuttShell (NSH)
nsh> uname -a
NuttX 0.0.0 db6ec219d1 May 25 2026 18:10:35 sim sim
nsh> hello
Hello, World!!
nsh> 

➜  nuttx-github-metrics git:(main) $ neofetch
                    'c.          luppy@5ce91ef07f94 
                 ,xNMM.          ------------------ 
               .OMMMMo           OS: macOS 26.4.1 25E253 arm64 
               OMMM0,            Host: Mac14,12 
     .;loddo:' loolloddol;.      Kernel: 25.4.0 
   cKMMMMMMMMMMNWMMMMMMMMMM0:    Uptime: 25 days, 6 hours, 33 mins 
 .KMMMMMMMMMMMMMMMMMMMMMMMWd.    Packages: 205 (brew) 
 XMMMMMMMMMMMMMMMMMMMMMMMX.      Shell: zsh 5.9 
;MMMMMMMMMMMMMMMMMMMMMMMM:       Resolution: 3840x2160 
:MMMMMMMMMMMMMMMMMMMMMMMM:       DE: Aqua 
.MMMMMMMMMMMMMMMMMMMMMMMMX.      WM: Quartz Compositor 
 kMMMMMMMMMMMMMMMMMMMMMMMMWd.    WM Theme: Blue (Light) 
 .XMMMMMMMMMMMMMMMMMMMMMMMMMMk   Terminal: vscode 
  .XMMMMMMMMMMMMMMMMMMMMMMMMK.   CPU: Apple M2 Pro 
    kMMMMMMMMMMMMMMMMMMMMMMd     GPU: Apple M2 Pro 
     ;KMMMMMMMWXXWMMMMMMMk.      Memory: 6151MiB / 32768MiB 
       .cooc,.    .,coo:.