build: qt build broken on aarch64 macOS #34951

issue fanquake opened this issue on March 30, 2026

fanquake commented at 1:30 AM on March 30, 2026: member

# clang --version
Apple clang version 21.0.0 (clang-2100.0.123.102)

make -C depends
<snip>
In file included from /bitcoin/depends/work/build/aarch64-apple-darwin25.3.0/qt/6.8.3-130fac6dd57/qtbase/include/QtCore/qyieldcpu.h:1:
/bitcoin/depends/work/build/aarch64-apple-darwin25.3.0/qt/6.8.3-130fac6dd57/qtbase/src/corelib/thread/qyieldcpu.h:35:5: error: implicitly declaring library function '__yield' with type 'void ()' [-Werror,-Wimplicit-function-declaration]
   35 |     __yield();              // Generic
      |     ^
/bitcoin/depends/work/build/aarch64-apple-darwin25.3.0/qt/6.8.3-130fac6dd57/qtbase/src/corelib/thread/qyieldcpu.h:35:5: note: include the header <arm_acle.h> or explicitly provide a declaration for '__yield'
1 error generated.

hebasto added the label macOS on Mar 30, 2026
hebasto added the label Build system on Mar 30, 2026
hebasto commented at 10:57 AM on March 30, 2026: member
# clang --version Apple clang version 21.0.0 (clang-2100.0.123.102)
A note for myself: this Apple clang version is part of the recent Xcode 26.4 update.
fanquake added this to the milestone 31.0 on Mar 30, 2026

Sjors commented at 7:44 AM on March 31, 2026: member

With Xcode 26.4 installed:

% clang --version
Apple clang version 21.0.0 (clang-2100.0.123.102)
Target: arm64-apple-darwin25.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

On master @ c97ac44c34e8b84244d2ae765c7ee358b37b012e:

% make -C depends
/bin/sh: command -v llvm-ranlib: No such file or directory
/bin/sh: command -v llvm-strip: No such file or directory
/bin/sh: command -v llvm-nm: No such file or directory
/bin/sh: command -v llvm-objcopy: No such file or directory
/bin/sh: command -v llvm-objdump: No such file or directory
...
In file included from /Users/dev/bitcoin-pr/34956-qt-depends/depends/work/build/aarch64-apple-darwin25.4.0/qt/6.8.3-b65a21cb5d4/qtbase/include/QtCore/qyieldcpu.h:1:
/Users/dev/bitcoin-pr/34956-qt-depends/depends/work/build/aarch64-apple-darwin25.4.0/qt/6.8.3-b65a21cb5d4/qtbase/src/corelib/thread/qyieldcpu.h:35:5: error: implicitly declaring library function '__yield' with type 'void ()' [-Werror,-Wimplicit-function-declaration]
   35 |     __yield();              // Generic
      |     ^
/Users/dev/bitcoin-pr/34956-qt-depends/depends/work/build/aarch64-apple-darwin25.4.0/qt/6.8.3-b65a21cb5d4/qtbase/src/corelib/thread/qyieldcpu.h:35:5: note: include the header <arm_acle.h> or explicitly provide a declaration for '__yield'
1 error generated.
ninja: build stopped: subcommand failed.
make: *** [/Users/dev/bitcoin-pr/34956-qt-depends/depends/work/build/aarch64-apple-darwin25.4.0/qt/6.8.3-b65a21cb5d4/./.stamp_built] Error 1

I'll try #34956.

fanquake closed this on Apr 1, 2026
fanquake referenced this in commit 8b461c530e on Apr 1, 2026

hebasto commented at 2:44 PM on April 2, 2026: member

@Sjors

% make -C depends
/bin/sh: command -v llvm-ranlib: No such file or directory
/bin/sh: command -v llvm-strip: No such file or directory
/bin/sh: command -v llvm-nm: No such file or directory
/bin/sh: command -v llvm-objcopy: No such file or directory
/bin/sh: command -v llvm-objdump: No such file or directory
...

A friendly reminder from your own commit b645c520714cc7cd4d50e62a3f90cbbdb5521336:

recommend modern make for macOS depends

Sjors commented at 5:00 PM on April 3, 2026: member

@hebasto thanks, I keep forgetting that. I wonder if we should make it an error.

... or just not worry about it, I finally got nix to work on a new machine :-)

<img width="513" height="73" alt="Image" src="https://github.com/user-attachments/assets/9bdec9a1-f1da-43fe-95cc-cab90f3595ed" />

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#34956 depends, qt: Fix build on aarch64 macOS 26.4