user/grantlee: Explicitly register enum comparator

This is necessary to make the tests pass on 64-bit PowerPC.  This is
caused because the MetaEnumVariable class does not register its
comparators, which is required in Qt 5.

Qt 6 will use introspection to automatically do this.  The proper fix is
likely to use a constructor function somewhere in the Grantlee library
to ensure it is called on library initialisation, but it isn't
immediately obvious to me where to put such a ctor.

This only seems to affect 64-bit PowerPC, as other platforms do pass
this test; maybe Qt is doing some sort of introspection that doesn't
work on ppc64.  It is also affected by GCC optimisation flags, so it may
be a miscompilation.

At any rate, this patch *does* fix the tests.  Prior to 5.3.0, enums did
not compare correctly anyway, so this does not have a very high impact.

Fixes: #955

1 files changed, 14 insertions, 0 deletions

diff --git a/user/grantlee/enum-comparators.patch b/user/grantlee/enum-comparators.patch
new file mode 100644
index 000000000..94ee57e66
--- /dev/null
+++ b/user/grantlee/enum-comparators.patch
@@ -0,0 +1,14 @@
+Upstream-URL: https://github.com/steveire/grantlee/issues/89
+
+diff --git a/templates/tests/testbuiltins.cpp b/templates/tests/testbuiltins.cpp
+index fe7e4ed..82a065d 100644
+--- a/templates/tests/testbuiltins.cpp
++++ b/templates/tests/testbuiltins.cpp
+@@ -298,6 +298,7 @@ void TestBuiltinSyntax::testObjects()
+   Q_UNUSED(s3);
+ 
+   QMetaType{qMetaTypeId<MetaEnumVariable>()}.create(nullptr);
++  QMetaType::registerComparators<MetaEnumVariable>();
+ }
+ 
+ void TestBuiltinSyntax::testTruthiness_data()