Fix and improve sensor configuration file lookup

This commit addresses some of the sensor configuration lookup issues
- The CMake rule to use compile-time flag was opposite than intended
- The configuration file is now looked from all returned configuration
  paths, not just the last one which seemed a bit arbitrary
- Update related documentation, and while doing that also remove
  references to "N900" which  probably won't say that much to people
  these days (N900 was a smart phone released 12 years ago)

Pick-to: 6.2
Task-number: QTBUG-92505
Task-number: QTBUG-92512
Change-Id: Ib66ae052a815bbe3af32bd896931e65375e8546e
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

1 files changed, 6 insertions, 4 deletions

diff --git a/src/sensors/qsensormanager.cpp b/src/sensors/qsensormanager.cpp
index 43286467..95d9b6c0 100644
--- a/src/sensors/qsensormanager.cpp
+++ b/src/sensors/qsensormanager.cpp
@@ -96,10 +96,12 @@ public:
         QString config = QString::fromLocal8Bit(QTSENSORS_CONFIG_PATH);
 #else
         QStringList configs = QStandardPaths::standardLocations(QStandardPaths::ConfigLocation);
-        if (configs.count() == 0) return; // QStandardPaths is broken?
-        QString config = configs.at(configs.count()-1);
-        if (config.isEmpty()) return; // QStandardPaths is broken?
-        config += QLatin1String("/QtProject/Sensors.conf");
+        QString config;
+        for (const QString& c : configs) {
+            config = c + QLatin1String("/QtProject/Sensors.conf");
+            if (QFile::exists(config))
+                break;
+        }
 #endif
         qCDebug(sensorsCategory) << "Loading config from" << config;
         if (!QFile::exists(config)) {