Deployment size for Linux vs Windows

m3g1dd

I'm deploying an app developed by Qt for both Windows and Linux:

On Windows I'm using built-in Qt windeployqt tool:

windeployqt.exe app.exe --qmldir %NS_REPO_DIR%\qml\

On Linux I'm using linuxdeployqt:

linuxdeployqt_EXE="${NS_REPO_DIR}/scripts/linuxdeployqt/linuxdeployqt-7-x86_64.AppImage"

${linuxdeployqt_EXE} app -qmake=${NS_QT_QMAKE_EXE} -qmldir=${NS_REPO_DIR}/qml/

The deployment size for Windows is around 70 MB and for Linux is around 300 MB. Is it normal? Is there anything I might be missing?

Thanks!

jsulm

@m3g1dd You can remove libs which are not used by your app.
Do

ldd YOUR_APP

to see which libs are used.

sierdzio

Maybe you have used debug libraries on Linux? They weigh a lot more than release ones.

m3g1dd

@sierdzio

This is my deployment on Linux whose content is sorted by size. The Qt files don't look like to be debug mode. Also, there is a huge libQt5WebEngineCore.so.5.12.7 file of 111 MB:

m3g1dd

@m3g1dd

Some non-Qt files like TBB files are deployed which are in debug mode. But their sizes are not that large.

Any ways, I might remove the non-Qt debug mode files and see how it changes the deployment size.

jsulm

@m3g1dd You can remove libs which are not used by your app.
Do

ldd YOUR_APP

to see which libs are used.

wrosecrans

@m3g1dd This isn't a particularly large part of your problem, but it makes no sense that libgmp.a is in your AppImage. There is generally no need to ship a static library like that for use at runtime.

That said, compare exactly what libs are shipped on Windows. Is LinuxdeployQt including more libraries, or are those libraries just individually all larger?

m3g1dd

The major reason for Linux vs Windows deployment size difference (300 MB vs 70MB) is suggested to be: https://stackoverflow.com/a/65813398/3405291

jsulm

@m3g1dd So, did you try to find out whether all these libs are really needed? Did you check what @wrosecrans wrote?