Found where the problem is. It's in the KStandardDirs::findExe()
function. From line 937 (http://api.kde.org/3.5-api/kdelibs-
apidocs/kdecore/html/kstandarddirs_8cpp-source.html#l00937)
QString p =
QString("%1/%2").arg(kfsstnd_defaultbindir()).arg(real_appname);
you can see that it uses function kfsstnd_defaultbindir() to get the
absolute path to the application. KStandardDirs::kfsstnd_defaultbindir()
returns __KDE_BINDIR and, from the ubuntu packages, the default compiled
value for __KDE_BINDIR is /usr/bin. So, it doesn't matter what you set
in your PATH environment variable, but it always will execute
/usr/bin/myapp.
IMHO, I think that KStandardDirs::findExe() should use
KStandardDirs::kfsstnd_defaultbindir() as the last option to find the
absolute path to the application (and not as the second one, as is coded
right now).
--
.desktop file not honoring PATH environment variable
https://bugs.launchpad.net/bugs/252571
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