WebEngine by default OFF, when used Qt 5.7+, automatically detected.

rssguard.pro

@@ -100,7 +100,19 @@ isEmpty(DESTDIR) {
 }
 
 isEmpty(USE_WEBENGINE) {
-  USE_WEBENGINE = true
+  USE_WEBENGINE = false
+  message(rssguard: USE_WEBENGINE variable is not set.)
+
+  !lessThan(QT_MAJOR_VERSION, 5):!lessThan(QT_MINOR_VERSION, 7) {
+    qtHaveModule(webenginewidgets) {
+      USE_WEBENGINE = true
+      message("rssguard: WebEngine component IS installed, enabling it.")
+    }
+    else {
+      USE_WEBENGINE = false
+      message("rssguard: WebEngine component is probably NOT installed, disabling it.")
+    }
+  }
 }
 
 message(rssguard: Shadow copy build directory \"$$OUT_PWD\".)
@@ -148,6 +160,7 @@ message(rssguard: Build revision: \"$$APP_REVISION\".)
 message(rssguard: lrelease executable name: \"$$LRELEASE_EXECUTABLE\".)
 
 QT += core gui widgets sql network xml printsupport
+
 CONFIG *= c++11 debug_and_release warn_on
 DEFINES *= QT_USE_QSTRINGBUILDER QT_USE_FAST_CONCATENATION QT_USE_FAST_OPERATOR_PLUS UNICODE _UNICODE
 VERSION = $$APP_VERSION
@@ -546,6 +559,10 @@ win32 {
   QMAKE_EXTRA_TARGETS += seven_zip zip
 }
 
+equals(USE_WEBENGINE, false) {
+  # Add extra file naming when building without webengine.
+}
+
 # Create NSIS installer target on Windows.
 win32 {
   nsis.target = nsis