macOS arm-gcc-bin@12 from osx-cross failes

[strongly-typed]

Works:

➜  blink git:(develop) ✗ arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/local/Cellar/arm-gcc-bin@11/11.3.Rel1/bin/../libexec/gcc/arm-none-eabi/11.3.1/lto-wrapper
Target: arm-none-eabi
Configured with: /Volumes/data/jenkins/workspace/GNU-toolchain/arm-11/src/gcc/configure --target=arm-none-eabi --prefix=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-eabi/install --with-gmp=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-eabi/host-tools --with-mpfr=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-eabi/host-tools --with-mpc=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-eabi/host-tools --with-isl=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-eabi/host-tools --disable-shared --disable-nls --disable-threads --disable-tls --enable-checking=release --enable-languages=c,c++,fortran --with-newlib --with-gnu-as --with-gnu-ld --with-sysroot=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-eabi/install/arm-none-eabi --with-multilib-list=aprofile,rmprofile --with-pkgversion='Arm GNU Toolchain 11.3.Rel1' --with-bugurl=https://bugs.linaro.org/
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 11.3.1 20220712 (Arm GNU Toolchain 11.3.Rel1)
➜  blink git:(develop) ✗ lbuild build && scons

scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
Memory usage··· /Users/sascha/Dev/modm/modm-str/build/stm32f4_discovery/blink/scons-release/blink.elf
Program:   3.1 KiB /   1.0 MiB (0.3% used)
(.fastdata + .rodata + .text)

Data:      3.1 KiB / 196.0 KiB (1.6% used) = 144 B static (0.1%) + 3072 B stack (1.5%)
(.bss + .fastdata + .stack)

Heap:    192.9 KiB / 196.0 KiB (98.4% available)
(.heap_backup + .heap_ccm + .heap_sram1 + .heap_sram2)

scons: done building targets.

Does not work:

➜  blink git:(develop) ✗ brew unlink arm-gcc-bin@11
Unlinking /usr/local/Cellar/arm-gcc-bin@11/11.3.Rel1... 96 symlinks removed.
➜  blink git:(develop) ✗ brew link arm-gcc-bin@12
Linking /usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1... 96 symlinks created.
➜  blink git:(develop) ✗ arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/bin/../libexec/gcc/arm-none-eabi/12.2.1/lto-wrapper
Target: arm-none-eabi
Configured with: /Volumes/data/jenkins/workspace/GNU-toolchain/arm-12/src/gcc/configure --target=arm-none-eabi --prefix=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-12/build-arm-none-eabi/install --with-gmp=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-12/build-arm-none-eabi/host-tools --with-mpfr=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-12/build-arm-none-eabi/host-tools --with-mpc=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-12/build-arm-none-eabi/host-tools --with-isl=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-12/build-arm-none-eabi/host-tools --disable-shared --disable-nls --disable-threads --disable-tls --enable-checking=release --enable-languages=c,c++,fortran --with-newlib --with-gnu-as --with-gnu-ld --with-sysroot=/Volumes/data/jenkins/workspace/GNU-toolchain/arm-12/build-arm-none-eabi/install/arm-none-eabi --with-multilib-list=aprofile,rmprofile --with-pkgversion='Arm GNU Toolchain 12.2.Rel1 (Build arm-12.24)' --with-bugurl=https://bugs.linaro.org/
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 12.2.1 20221205 (Arm GNU Toolchain 12.2.Rel1 (Build arm-12.24))
➜  blink git:(develop) ✗ lbuild build && scons

scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
Compiling C++·· release/main.o
Compiling C···· release/modm/ext/gcc/cabi.o
Compiling C++·· release/modm/ext/gcc/cxxabi.o
Compiling C++·· release/modm/ext/gcc/new_delete.o
Compiling C++·· release/modm/src/modm/architecture/driver/atomic/flag.o
Compiling C++·· release/modm/src/modm/board/board.o
Compiling C++·· release/modm/src/modm/container/smart_pointer.o
Compiling C++·· release/modm/src/modm/io/iostream.o
Compiling C++·· release/modm/src/modm/io/iostream_printf.o
Compiling C++·· release/modm/src/modm/math/utils/bit_operation.o
Compiling C++·· release/modm/src/modm/math/utils/pc/operator.o
Compiling C++·· release/modm/src/modm/platform/clock/rcc.o
Compiling C++·· release/modm/src/modm/platform/clock/systick_timer.o
Compiling C++·· release/modm/src/modm/platform/core/assert.o
Compiling C++·· release/modm/src/modm/platform/core/delay.o
Compiling C++·· release/modm/src/modm/platform/core/delay_ns.o
Compiling C···· release/modm/src/modm/platform/core/no_heap.o
Assembling····· release/modm/src/modm/platform/core/reset_handler.o
Compiling C···· release/modm/src/modm/platform/core/startup.o
Compiling C···· release/modm/src/modm/platform/core/startup_platform.o
Compiling C···· release/modm/src/modm/platform/core/vectors.o
Compiling C++·· release/modm/src/modm/platform/gpio/enable.o
Compiling C++·· release/modm/src/modm/platform/i2c/i2c_master_1.o
Compiling C++·· release/modm/src/modm/platform/spi/spi_master_1.o
Compiling C···· release/modm/ext/printf/printf.o
In file included from modm/src/modm/container.hpp:13,
                 from modm/src/modm/platform/i2c/i2c_master_1.cpp:170:
modm/src/modm/container/deque.hpp:193:52: warning: 'template<class _Category, class _Tp, class _Distance, class _Pointer, class _Reference> struct std::iterator' is deprecated [-Wdeprecated-declarations]
  193 |                 class const_iterator : public std::iterator<std::bidirectional_iterator_tag, T>
      |                                                    ^~~~~~~~
In file included from /usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/stl_algobase.h:65,
                 from /usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/specfun.h:45,
                 from /usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/cmath:1935,
                 from modm/src/modm/math/utils/bit_operation.hpp:19,
                 from modm/src/modm/platform/gpio/base.hpp:17,
                 from modm/src/modm/platform/gpio/unused.hpp:15,
                 from modm/src/modm/platform/gpio/connector.hpp:15,
                 from modm/src/modm/platform/i2c/i2c_master_1.hpp:18,
                 from modm/src/modm/platform/i2c/i2c_master_1.cpp:166:
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/stl_iterator_base_types.h:127:34: note: declared here
  127 |     struct _GLIBCXX17_DEPRECATED iterator
      |                                  ^~~~~~~~
In file included from modm/src/modm/container.hpp:17:
modm/src/modm/container/linked_list.hpp:120:46: warning: 'template<class _Category, class _Tp, class _Distance, class _Pointer, class _Reference> struct std::iterator' is deprecated [-Wdeprecated-declarations]
  120 |                 class iterator : public std::iterator<std::forward_iterator_tag, T>
      |                                              ^~~~~~~~
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/stl_iterator_base_types.h:127:34: note: declared here
  127 |     struct _GLIBCXX17_DEPRECATED iterator
      |                                  ^~~~~~~~
modm/src/modm/container/linked_list.hpp:146:52: warning: 'template<class _Category, class _Tp, class _Distance, class _Pointer, class _Reference> struct std::iterator' is deprecated [-Wdeprecated-declarations]
  146 |                 class const_iterator : public std::iterator<std::forward_iterator_tag, T>
      |                                                    ^~~~~~~~
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/stl_iterator_base_types.h:127:34: note: declared here
  127 |     struct _GLIBCXX17_DEPRECATED iterator
      |                                  ^~~~~~~~
In file included from modm/src/modm/container.hpp:18:
modm/src/modm/container/doubly_linked_list.hpp:107:46: warning: 'template<class _Category, class _Tp, class _Distance, class _Pointer, class _Reference> struct std::iterator' is deprecated [-Wdeprecated-declarations]
  107 |                 class iterator : public std::iterator<std::forward_iterator_tag, T>
      |                                              ^~~~~~~~
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/stl_iterator_base_types.h:127:34: note: declared here
  127 |     struct _GLIBCXX17_DEPRECATED iterator
      |                                  ^~~~~~~~
modm/src/modm/container/doubly_linked_list.hpp:136:52: warning: 'template<class _Category, class _Tp, class _Distance, class _Pointer, class _Reference> struct std::iterator' is deprecated [-Wdeprecated-declarations]
  136 |                 class const_iterator : public std::iterator<std::forward_iterator_tag, T>
      |                                                    ^~~~~~~~
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/stl_iterator_base_types.h:127:34: note: declared here
  127 |     struct _GLIBCXX17_DEPRECATED iterator
      |                                  ^~~~~~~~
In file included from modm/src/modm/container.hpp:20:
modm/src/modm/container/dynamic_array.hpp:262:46: warning: 'template<class _Category, class _Tp, class _Distance, class _Pointer, class _Reference> struct std::iterator' is deprecated [-Wdeprecated-declarations]
  262 |                 class iterator : public std::iterator<std::forward_iterator_tag, T>
      |                                              ^~~~~~~~
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/stl_iterator_base_types.h:127:34: note: declared here
  127 |     struct _GLIBCXX17_DEPRECATED iterator
      |                                  ^~~~~~~~
modm/src/modm/container/dynamic_array.hpp:292:52: warning: 'template<class _Category, class _Tp, class _Distance, class _Pointer, class _Reference> struct std::iterator' is deprecated [-Wdeprecated-declarations]
  292 |                 class const_iterator : public std::iterator<std::forward_iterator_tag, T>
      |                                                    ^~~~~~~~
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/arm-none-eabi/include/c++/12.2.1/bits/stl_iterator_base_types.h:127:34: note: declared here
  127 |     struct _GLIBCXX17_DEPRECATED iterator
      |                                  ^~~~~~~~
Archiving······ release/modm/libmodm.a
Indexing······· release/modm/libmodm.a
Linking········ /Users/sascha/Dev/modm/modm-str/build/stm32f4_discovery/blink/scons-release/blink.elf
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/bin/ld: warning: /Users/sascha/Dev/modm/modm-str/build/stm32f4_discovery/blink/scons-release/blink.elf has a LOAD segment with RWX permissions
collect2: error: ld returned 1 exit status
scons: *** [/Users/sascha/Dev/modm/modm-str/build/stm32f4_discovery/blink/scons-release/blink.elf] Error 1
scons: building terminated because of errors.

I am using the toolchain from osx-cross

➜  blink git:(develop) ✗ brew info arm-gcc-bin@11
==> osx-cross/arm/arm-gcc-bin@11: stable 11.3.Rel1 (bottled)
Pre-built GNU toolchain for Arm Cortex-M and Cortex-R processors
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
/usr/local/Cellar/arm-gcc-bin@11/11.3.Rel1 (6,336 files, 2.9GB)
  Poured from bottle on 2023-02-13 at 22:44:51
From: https://github.com/osx-cross/homebrew-arm/blob/HEAD/Formula/[email protected]
➜  blink git:(develop) ✗ brew info arm-gcc-bin@12
==> osx-cross/arm/arm-gcc-bin@12: stable 12.2.Rel1 (bottled)
Pre-built GNU toolchain for Arm Cortex-M and Cortex-R processors
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
/usr/local/Cellar/arm-gcc-bin@12/12.2.Rel1 (6,352 files, 840.7MB) *
  Poured from bottle on 2023-02-13 at 22:34:32
From: https://github.com/osx-cross/homebrew-arm/blob/HEAD/Formula/[email protected]

[chris-durand]

It's a known issue. Linking with GCC12 emits a linker warning that is treated as error. When #940 is merged the warning will be disabled and GCC 12 will work.

[strongly-typed]

Awwhh, great! Looked in the issues, but not in the PRs.

[salkinium]

@strongly-typed If you have time and motivation, I would love if you could locally debug the new Docker container for the documentation generator. Specifically this step simply never makes/reports progress. I suspect it's something to do with the file deduplication via symlinks in combination with Pythons multiprocessing issues (which I've already tried to fix by switching to spawn mode). I cannot reproduce this on my mac, it must be something with the Docker container specifically. Perhaps the upgrade from Ubuntu 20.04 to 22.04 changed something with the filesystem? That's the very last thing that's holding back GCC12 support.