Orion Poplawski wrote:
Sounds good to me - my users (old unix folks who always use the
line) are always complaining about this. Where do we tweak that?
Unfortunately, it can't really be done without modifications to either Qt or
the Qt applications. Either we build the applications with
QT_NO_DEBUG_OUTPUT and QT_NO_WARNING_OUTPUT (and fix them if they rely on
side effects in the debugging lines, or on <QDebug> getting implicitly
included), or we patch the default message handlers in Qt itself (e.g., to
print nothing unless some QT_DEBUG environment variable is set).
It is unfortunate that upstream does not provide a better way to disable all
output at runtime. The only thing that can be controlled at runtime is
kDebug with a context number (kdelibs 3 and 4) or qCDebug/qCWarning/… with a
declared context name (Qt 5). Uncategorized qDebug/qWarning/… cannot be
enabled/disabled at runtime. At least Qt 5 also allows categorized
qCWarning, but I doubt it is in wide use.