MACOS 15.3, Qt 6.8.1 - error: no such file or directory: 'QtWidgets' clang++: error: no such file or directory: 'QtWidgets' make

PhilC 0

Hi,

I have been developing code for some years with no substantial issue, until now.

I am using a Mac Book Pro M3 running 15.3 (Sonoma) and Xocde 15.

I recompiled a previously working application (actually it compiles fine on Linux and Win10 platforms).

I now get an error: error: no such file or directory: 'QtWidgets' clang++: error: no such file or directory: 'QtWidgets' make

I have used both the Qt maintenance tool to install Qt, and recently deleted all of that and installed homebrew Qt 6.8.2 and Qt-creator 15.0.1 to teset if it was something I'd not included from the distribution.

Product: Qt Creator 15.0.1
Based on: Qt 6.8.1 (Clang 15.0 (Apple), arm64)
Built on: Jan 22 2025 13:40:52
From revision: 0855a2e14d

I have the Qt bin included in the .zshrc PATH variable:
export PATH=":/opt/homebrew/Cellar/qt/6.8.2/bin:$PATH"
export PATH=":/opt/homebrew/Cellar/qt/6.8.2/lib:$PATH"

Any ideas what I am doing wrong?

Phil

Christian Ehrlicher

Please post the command line which produces the error. Also make sure the headers are in the location where the compiler expects them.

Axel Spoerl

Good morning!
How have you re-compiled the application? Inside Qt Creator, or by running ninja / cmake in its build tree? Please try from Creator. Check whether the compile kit s the right one and the Qt version is pointing to the qmake executable in the 6.8.1 installation tree.

PhilC 0

@Axel-Spoerl Hi,

Thanks I've been using QtCreator, so just button clicking. The application has been compiled successfully a week before I was obliged to upgrade to v15.3 macos . So I am suspicious of that upgrade. I tried searching on the Mac support, but nothing there.

I'll check the paths are seen and the Qt version with qmake. Thanks for the suggestions (also to Christian Ehlicher).

Phil

Axel Spoerl

You can also try to clean the build directory with Build->Clean or just deleting the build tree manually. I’ve had such failures after updates before and they can have all kinds of reasons.