RIOT cannot compile with the latest version of macOS (10.14) and Xcode 10

[Zhiyi-Zhang]

Description

RIOT cannot compile with the latest version of macOS.

Steps to reproduce the issue

Compile the example/hello_world with default configuration (native).

Expected results

No errors.

Actual results

ld: warning: The i386 architecture is deprecated for macOS (remove from the Xcode build setting: ARCHS)
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, missing required architecture i386 in file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libdl.tbd, missing required architecture i386 in file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libdl.tbd
Undefined symbols for architecture i386:
  "_strndup", referenced from:
      _tty_uart_setup in periph.a(uart.o)
  "_sigaltstack$UNIX2003", referenced from:
      _native_interrupt_init in cpu.a(irq_cpu.o)
...
...
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Versions

Operating system: Mac OSX
Build environment:
native gcc: Apple LLVM version 10.0.0 (clang-1000.11.45.2)
clang: Apple LLVM version 10.0.0 (clang-1000.11.45.2)

[gebart]

It looks like you need an older xcode version.
https://forums.developer.apple.com/thread/108704

Future MacOS releases may drop 32 bit support for applications though, so RIOT would have to add support for building as a 64 bit binary to continue supporting MacOS.

[Zhiyi-Zhang]

It looks like you need an older xcode version.
https://forums.developer.apple.com/thread/108704

A downgrade is always not the best choice :-(
Hope RIOT team can handle this issue as soon as possible since new macOS has been revealed for some time.

[jia200x]

(I added triple ticks to the log so it formats better)

[larseggert]

Before I even get the linker error above, I needed to add

CFLAGS += -isystem /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include

to my Makefile, so the headers are being found.

[smlng]

MacOS is not supported as RIOT native does not run on 64Bit CPUs (yet)

[smlng]

Hence, this can be closed

[miri64]

Weellll, this _could_ become a problem in Ubuntu as well...

[jenswet]

Are there any news about this?

[miri64]

There is https://github.com/RIOT-OS/RIOT/pull/13009, but development on that seems to be stalled.