libexec dir and Qt / qtwebengine fails finding QtWebEngineProcess

libexec dir and Qt / qtwebengine fails finding QtWebEngineProcess

[Hartmut Goebel]

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Hi,

I just built XRview https://codeberg.org/openKMU/xrechnung/ a QT viewer 
for German electronic invoices. This uses qtwebengine to display convert 
and the data.

This fails finding the QtWebEngineProcess executable.

The following paths were searched for Qt WebEngine Process:
  /gnu/store/nns96pk4bsyihmw6yksghglm19nimd9r-qtbase-6.6.3/lib/qt6/libexec/QtWebEngineP
rocess
  /gnu/store/nns96pk4bsyihmw6yksghglm19nimd9r-qtbase-6.6.3/bin/QtWebEngineProcess
  /gnu/store/dq55b09vcw4cwgwivlcrsi0yn3nhv48w-xrview-1.0/bin/QtWebEngineProcess
but could not find it.
You may override the default search path by using 
QTWEBENGINEPROCESS_PATH environment v
ariable.

 From Guix POV the cause is that the libexec directory only from qtbase 
is in this search path.

The message also suggests a simple solution: add native search path 
QTWEBENGINEPROCESS_PATH.

Anyhow this is is not a good solution IMHO, since

  * this will create a long path in QTWEBENGINEPROCESS_PATH while only a
    single entry would suffice
  * this will fail for other parts of Qt also searching the libexec
    directory.

A better solution would be to create a native-search-path (e.g. 
GUIX_QT_LIBEXEC_PATH) and make Qt search this path.

Any idea how we could achieve this?

-- 
Regards
Hartmut Goebel

| Hartmut Goebel          |h.goebel@crazy-compilers.com                |
|www.crazy-compilers.com  | compilers which you thought are impossible |

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