Hi Ivan, Bingo, that was the problem. qfloat16.h wasn't missing. src_corelib_serialization_qcborstream.cpp depends on the float c'tor of qfloat16, which isn't compiled when QFLOAT16_IS_NATIVE is defined. https://codereview.qt-project.org/c/qt/qtbase/+/662227 has added the source unconditionally, which causes a compile error on systems with native float support. Adaped the fix in https://codereview.qt-project.org/c/qt/qtbase/+/664024 accordingly.
Cheers Axel Confidential ________________________________ From: Ivan Solovev <ivan.solo...@qt.io> Sent: Monday, 28 July 2025 18:03 To: Qt Development <development@qt-project.org>; Axel Spoerl <axel.spo...@qt.io> Subject: Re: Change in qfloat16 ? Hi Axel, I do not recall any recent changes to qfloat16. However, note that its available constructors depend on the QFLOAT16_IS_NATIVE define which can be different on different platforms and/or compilers. Looks like you have a native float16 support locally, while the CI only compiles snippets in the configuration that does not have a native float16 support, so the implicit constructor from float is enabled. ------------------------------ Ivan Confidential ________________________________________ From: Development <development-boun...@qt-project.org> on behalf of Axel Spoerl via Development <development@qt-project.org> Sent: Monday, July 28, 2025 5:13 PM To: Qt Development Subject: [Development] Change in qfloat16 ? Hi, Has anything changed in the qfloat16 implementation recently? With qtbase head at 0dc377283b024cc65d6e8cd2126066ecbe753bea and ../../dev/qtbase/configure -developer-build -xcb -make tests ...and g++15.1.1 on openSuSE, I get this error: /home/axel/QtGit/dev/qtbase/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp: In function ‘void writeDouble(QCborStreamWriter&, double)’: /home/axel/QtGit/dev/qtbase/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp:164:24: error: conversion from ‘float’ to non-scalar type ‘qfloat16’ requested 164 | qfloat16 f16 = f; This fixes the problem: https://codereview.qt-project.org/c/qt/qtbase/+/664024 But I wonder how this can have merged: https://codereview.qt-project.org/c/qt/qtbase/+/663662 Thanks, Axel Confidential
-- Development mailing list Development@qt-project.org https://lists.qt-project.org/listinfo/development
