Compilation on MacOs - M2

[HouseSimOn]

I've performed steps from https://datasheets.raspberrypi.com/pico/getting-started-with-pico.pdf to install compiler:

$ brew install cmake
$ brew tap ArmMbed/homebrew-formulae
$ brew install arm-none-eabi-gcc

After that I tried to compile project and I got following error:
arm-none-eabi-gcc: fatal error: cannot read spec file 'nosys.specs': No such file or directory

Then I uninstalled arm-none-eabi-gcc using brew and installed brew install --cask gcc-arm-embedded. Now compilation works, but I see that compiler identification is AppleClang rather than arm-none-eabi-.

Configuring cmake I see correct compilers:

% cmake -G "Unix Makefiles" ..
Defaulting PICO_PLATFORM to rp2040 since not specified.
Defaulting PICO platform compiler to pico_arm_gcc since not specified.
-- Defaulting build type to 'Release' since not specified.
PICO compiler is pico_arm_gcc
-- The C compiler identification is GNU 12.3.1
-- The CXX compiler identification is GNU 12.3.1
-- The ASM compiler identification is GNU
-- Found assembler: /opt/homebrew/bin/arm-none-eabi-gcc

But during compilation I see AppleClang:

% make 
[  1%] Creating directories for 'ELF2UF2Build'
[  2%] No download step for 'ELF2UF2Build'
[  3%] No update step for 'ELF2UF2Build'
[  4%] No patch step for 'ELF2UF2Build'
[  5%] Performing configure step for 'ELF2UF2Build'
-- The C compiler identification is AppleClang 14.0.3.14030022
-- The CXX compiler identification is AppleClang 14.0.3.14030022

Why there is info about AppleClang compiler?

[kilograham]

Because tools like elf2uf2 and pioasm are compiled from source using the native compiler

[lurch]

ping @aallan in case the instructions in the Getting Started PDF need updating for M2 Macs.

[timlukins]

Installing on a M2 Mac today this worked for me. Thanks for up-to-date hint.

However, I had to not only do a brew uninstall arm-none-eabi-gcc (as I had installed this first) - but then a brew autoremove to get rid of some lingering files before the brew install --cask gcc-arm-embedded would work.

i.e.

% brew uninstall arm-none-eabi-gcc
Uninstalling /opt/homebrew/Cellar/arm-none-eabi-gcc/13.2.0... (566 files, 155.8MB)

% brew install --cask gcc-arm-embedded
==> Downloading https://developer.arm.com/-/media/Files/downloads/gnu/12.3.rel1/binrel/arm-gnu-toolchain-12.3.rel1-darwin-arm64-arm-none-eabi.pkg
Already downloaded: /Users/tim/Library/Caches/Homebrew/downloads/aece88d979bd1713368d7f7e09da4283d884cf79f498e99ac02d5ad8415bcdb7--arm-gnu-toolchain-12.3.rel1-darwin-arm64-arm-none-eabi.pkg
==> Installing Cask gcc-arm-embedded
==> Running installer for gcc-arm-embedded; your password may be necessary.
Package installers may write to any location; options such as `--appdir` are ignored.
installer: Package name is arm-gnu-toolchain-12.3.rel1-darwin-arm64-arm-none-eabi
installer: Upgrading at base path /
installer: The upgrade was successful.
==> Purging files for version 12.3.rel1 of Cask gcc-arm-embedded
Error: It seems there is already a Binary at '/opt/homebrew/bin/arm-none-eabi-as'.

 % brew autoremove                       
==> Autoremoving 4 unneeded formulae:
arm-none-eabi-binutils
gmp
libmpc
mpfr
Uninstalling /opt/homebrew/Cellar/arm-none-eabi-binutils/2.41... (81 files, 30.6MB)
Uninstalling /opt/homebrew/Cellar/libmpc/1.3.1... (12 files, 470KB)
Uninstalling /opt/homebrew/Cellar/mpfr/4.2.0-p12... (30 files, 3MB)
Uninstalling /opt/homebrew/Cellar/gmp/6.2.1_1... (21 files, 3.2MB)

% brew install --cask gcc-arm-embedded  
==> Downloading https://developer.arm.com/-/media/Files/downloads/gnu/12.3.rel1/binrel/arm-gnu-toolchain-12.3.rel1-darwin-arm64-arm-none-eabi.pkg
Already downloaded: /Users/tim/Library/Caches/Homebrew/downloads/aece88d979bd1713368d7f7e09da4283d884cf79f498e99ac02d5ad8415bcdb7--arm-gnu-toolchain-12.3.rel1-darwin-arm64-arm-none-eabi.pkg
==> Installing Cask gcc-arm-embedded
==> Running installer for gcc-arm-embedded; your password may be necessary.
Package installers may write to any location; options such as `--appdir` are ignored.
installer: Package name is arm-gnu-toolchain-12.3.rel1-darwin-arm64-arm-none-eabi
installer: Upgrading at base path /
installer: The upgrade was successful.
==> Linking Binary 'arm-none-eabi-as' to '/opt/homebrew/bin/arm-none-eabi-as'
==> Linking Binary 'arm-none-eabi-c++' to '/opt/homebrew/bin/arm-none-eabi-c++'
==> Linking Binary 'arm-none-eabi-c++filt' to '/opt/homebrew/bin/arm-none-eabi-c++filt'
==> Linking Binary 'arm-none-eabi-cpp' to '/opt/homebrew/bin/arm-none-eabi-cpp'
==> Linking Binary 'arm-none-eabi-elfedit' to '/opt/homebrew/bin/arm-none-eabi-elfedit'
==> Linking Binary 'arm-none-eabi-g++' to '/opt/homebrew/bin/arm-none-eabi-g++'
==> Linking Binary 'arm-none-eabi-gcc' to '/opt/homebrew/bin/arm-none-eabi-gcc'
==> Linking Binary 'arm-none-eabi-gcc-12.3.1' to '/opt/homebrew/bin/arm-none-eabi-gcc-12.3.1'
==> Linking Binary 'arm-none-eabi-gcc-ar' to '/opt/homebrew/bin/arm-none-eabi-gcc-ar'
==> Linking Binary 'arm-none-eabi-gcc-nm' to '/opt/homebrew/bin/arm-none-eabi-gcc-nm'
==> Linking Binary 'arm-none-eabi-gcc-ranlib' to '/opt/homebrew/bin/arm-none-eabi-gcc-ranlib'
==> Linking Binary 'arm-none-eabi-gcov' to '/opt/homebrew/bin/arm-none-eabi-gcov'
==> Linking Binary 'arm-none-eabi-gcov-dump' to '/opt/homebrew/bin/arm-none-eabi-gcov-dump'
==> Linking Binary 'arm-none-eabi-gcov-tool' to '/opt/homebrew/bin/arm-none-eabi-gcov-tool'
==> Linking Binary 'arm-none-eabi-gdb' to '/opt/homebrew/bin/arm-none-eabi-gdb'
==> Linking Binary 'arm-none-eabi-gdb-add-index' to '/opt/homebrew/bin/arm-none-eabi-gdb-add-index'
==> Linking Binary 'arm-none-eabi-gfortran' to '/opt/homebrew/bin/arm-none-eabi-gfortran'
==> Linking Binary 'arm-none-eabi-gprof' to '/opt/homebrew/bin/arm-none-eabi-gprof'
==> Linking Binary 'arm-none-eabi-ld' to '/opt/homebrew/bin/arm-none-eabi-ld'
==> Linking Binary 'arm-none-eabi-ld.bfd' to '/opt/homebrew/bin/arm-none-eabi-ld.bfd'
==> Linking Binary 'arm-none-eabi-lto-dump' to '/opt/homebrew/bin/arm-none-eabi-lto-dump'
==> Linking Binary 'arm-none-eabi-nm' to '/opt/homebrew/bin/arm-none-eabi-nm'
==> Linking Binary 'arm-none-eabi-objcopy' to '/opt/homebrew/bin/arm-none-eabi-objcopy'
==> Linking Binary 'arm-none-eabi-objdump' to '/opt/homebrew/bin/arm-none-eabi-objdump'
==> Linking Binary 'arm-none-eabi-ranlib' to '/opt/homebrew/bin/arm-none-eabi-ranlib'
==> Linking Binary 'arm-none-eabi-readelf' to '/opt/homebrew/bin/arm-none-eabi-readelf'
==> Linking Binary 'arm-none-eabi-size' to '/opt/homebrew/bin/arm-none-eabi-size'
==> Linking Binary 'arm-none-eabi-strings' to '/opt/homebrew/bin/arm-none-eabi-strings'
==> Linking Binary 'arm-none-eabi-strip' to '/opt/homebrew/bin/arm-none-eabi-strip'
==> Linking Binary 'arm-none-eabi-ar' to '/opt/homebrew/bin/arm-none-eabi-ar'
==> Linking Binary 'arm-none-eabi-addr2line' to '/opt/homebrew/bin/arm-none-eabi-addr2line'
🍺  gcc-arm-embedded was successfully installed!

[stefannilsson]

Thanks a lot, @timlukins ! Worked great on my M1 too.

[GoldeggCoder]

Thanks alot! Worked also on my M2 machine!!! Searched for hours. Got it now

[allthingsclowd]

Thank you - this solved an error I was getting on my Apple M2 Max.

"arm-none-eabi-gcc: fatal error: cannot read spec file 'nosys.specs': No such file or directory"

Got this after following the "Getting started Guide"

[aallan]

Okay, transferring this to the pico-feedback repo as a documentation problem.

[DenoG1997]

Thanks a lot!!!!!!!!!!!! finally after 12 hours of debugging.......

[aallan]

@nathan-contino We should possibly look at this as your intro to the PDF toolchain this week.

[mjmdavis]

FWIW I had the same issue which was resolved by brew install --cask gcc-arm-embedded

[opsnlops]

Same for me. I had to remove the old compiler and brew autoremove to let it clean up before I could get the gcc-arm-embedded install to go. Once I got the new one installed it was smooth sailing.

[axeleckert]

Thank you very much! Works after

1. brew uninstall arm-none-eabi-gcc
2. brew auto remove
3. brew install --cask gcc-arm-embedded

on my Mac M2 Max Sonoma!

[aallan]

See also raspberrypi/pico-sdk#1543 for OpenOCD related things.

[aallan]

Doesn't look to be anything specific to M2, or Sonoma. Looks to be a Homebrew imposed thing. General Mac instructions need updating in the Getting Started guide.

[aallan]

Also see #335

[aallan]

This one should be closed, right @nathan-contino this got fixed in the recent databooks PR?

[nathan-contino]

Yes!

[cryptographix]

Still not in the latest available pdf

(https://datasheets.raspberrypi.com/pico/getting-started-with-pico.pdf) is still incorrect.

Is there a release date for a new version?

[aallan]

No, we haven't made a documentation release yet. There will be one in the next month or so.

[happyldw]

감사합니다.
알려주신 대로 하니 빌드가 잘 됩니다.

[aallan]

Documentation release should happen beginning of next week.

[taesungh]

Thank you for the documentation update @aallan. However, I want to note that tapping ArmMbed/homebrew-formulae should not be necessary anymore as gcc-arm-embedded is a native cask, so I think the documentation in 9.1.1 could be further updated to remove the unnecessary tap

brew install cmake
brew install --cask gcc-arm-embedded