Problem

Qt5 applications fail to use OpenGL (even software rendering) in containerized environments.

Steps to reproduce:

docker run --rm -it cgr.dev/chainguard/wolfi-base
apk add qt5-qtbase qt5-qtbase-x11
# Run any Qt5 app requiring OpenGL

Error:

QXcbIntegration: Cannot create platform OpenGL context, neither GLX nor EGL are enabled

Root cause:

qt5-qtbase is compiled without XCB GLX/EGL integration. The file libQt5XcbQpa.so.5 contains the hardcoded error message and lacks GLX initialization code.

Missing configure flags:

• -xcb
• -xcb-xlib
• -feature-xcb-glx-plugin
• -egl
• Using -opengl instead of -opengl desktop on x86_64

Impact:

• Video playback shows black screen in applications like Stremio
• Software OpenGL via Mesa llvmpipe fails
• Affects all Qt5 GUI applications needing OpenGL in containers

Proposed solution:

I'm working on a fix that adds the missing configure flags. Currently part of a larger draft PR,
but happy to split the qt5-qtbase changes into a separate PR if preferred for easier review.
https://github.com/wolfi-dev/os/pull/69098/files#diff-c7b776b7f311351d1c674a9338ac129ead0ddc059e19a60dfa2dbd01b82e4e35R116-R143

Testing done:

• Confirmed the plugin exists but Qt can't use it
• Verified the error is in core Qt5XcbQpa library
• Testing fix with real applications (Stremio)