947831 – x11-libs/qwt[qt6] generates unusable pkg-config file for Qt6

Bug 947831 - x11-libs/qwt[qt6] generates unusable pkg-config file for Qt6

Summary: x11-libs/qwt[qt6] generates unusable pkg-config file for Qt6

Status:	CONFIRMED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	Current packages (show other bugs)
Hardware:	All Linux

Importance:	Normal normal
Assignee:	Gentoo Science Related Packages

URL:	https://sourceforge.net/p/qwt/bugs/353/
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Keywords:

Depends on:
Blocks:

Reported:	2025-01-10 22:14 UTC by Georg Rudoy
Modified:	2025-01-13 17:38 UTC (History)
CC List:	2 users (show)

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Runtime testing required:	---

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Description Georg Rudoy 2025-01-10 22:14:58 UTC

The pkg-config file for qwt6 advertises dependencies on Qt5:

% pkg-config --libs Qt6Qwt6
-lqwt6-qt6 -lQt5Concurrent -lQt5PrintSupport -lQt5Svg -lQt5OpenGL -lQt5Widgets -lQt5Gui -lQt5Core

since the `Requires` field there looks like

Requires: Qt5Widgets Qt5Concurrent Qt5PrintSupport Qt5Svg Qt5OpenGL


This causes Qt6 programs using Qwt via pkg-config to also pull in Qt5, resulting in failures to build in the best case.

This doesn't seem to depend on whether the qt5 variant is also built.

Reproducible: Always

Steps to Reproduce:
1. USE="qt6" emerge qwt
2. Query the pkg-config.
Actual Results:  
Bad dependencies on Qt5.

Expected Results:  
Dependencies on Qt6 only.