Loader: Deprecate the fallback provider

The fallback provider creates modules for all named dependencies that
were not found and only later checks during validation whether such a
pkg-config module exists. This breaks assumptions all over the place.
Since we have a superior replacement in qbspkgconfig, we now deprecate
the fallback provider.

Change-Id: I3694515865d63e7308cfab7778068aa2e480fe23
Reviewed-by: Ivan Komissarov <ABBAPOH@gmail.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/src/lib/corelib/language/builtindeclarations.cpp b/src/lib/corelib/language/builtindeclarations.cpp
index 2ad0e3ef4..4a83279a8 100644
--- a/src/lib/corelib/language/builtindeclarations.cpp
+++ b/src/lib/corelib/language/builtindeclarations.cpp
@@ -247,8 +247,14 @@ void BuiltinDeclarations::addDependsItem()
     item << PropertyDeclaration(StringConstants::multiplexConfigurationIdsProperty(),
                                 PropertyDeclaration::StringList, QString(),
                                 PropertyDeclaration::ReadOnlyFlag);
-    item << PropertyDeclaration(StringConstants::enableFallbackProperty(),
-                                PropertyDeclaration::Boolean, StringConstants::trueValue());
+    PropertyDeclaration fallbackProp(
+        StringConstants::enableFallbackProperty(),
+        PropertyDeclaration::Boolean,
+        StringConstants::falseValue());
+    fallbackProp.setDeprecationInfo(DeprecationInfo(
+        Version(2, 4),
+        Tr::tr("The fallback provider has been deprecated. Use qbspkgconfig instead.")));
+    item << fallbackProp;
     insert(item);
 }