Autogen: Add AUTO(MOC|RCC|UIC)_EXECUTABLE target properties

Allow to force moc/rcc/uic compiler used for AUTO(MOC|RCC|UIC).

Setting these properties is only necessary if you are going to do
strange things like build these tools as part of your own build system.

Setting these properties will also prevent cmake from testing the
binary: It is user-provided and assumed to be valid.

1 files changed, 17 insertions, 5 deletions

diff --git a/Source/cmQtAutoGenGlobalInitializer.cxx b/Source/cmQtAutoGenGlobalInitializer.cxx
index 0ed8af4..678ff14 100644
--- a/Source/cmQtAutoGenGlobalInitializer.cxx
+++ b/Source/cmQtAutoGenGlobalInitializer.cxx
@@ -75,14 +75,26 @@ cmQtAutoGenGlobalInitializer::cmQtAutoGenGlobalInitializer(
       bool const uic = target->GetPropertyAsBool("AUTOUIC");
       bool const rcc = target->GetPropertyAsBool("AUTORCC");
       if (moc || uic || rcc) {
-        // We support Qt4 and Qt5
+        std::string const mocExec =
+          target->GetSafeProperty("AUTOMOC_EXECUTABLE");
+        std::string const uicExec =
+          target->GetSafeProperty("AUTOUIC_EXECUTABLE");
+        std::string const rccExec =
+          target->GetSafeProperty("AUTORCC_EXECUTABLE");
+
+        // We support Qt4, Qt5 and Qt6
         auto qtVersion = cmQtAutoGenInitializer::GetQtVersion(target);
-        if ((qtVersion.Major == 4) || (qtVersion.Major == 5) ||
-            (qtVersion.Major == 6)) {
+        bool const validQt = (qtVersion.Major == 4) ||
+          (qtVersion.Major == 5) || (qtVersion.Major == 6);
+        bool const mocIsValid = moc && (validQt || !mocExec.empty());
+        bool const uicIsValid = uic && (validQt || !uicExec.empty());
+        bool const rccIsValid = rcc && (validQt || !rccExec.empty());
+
+        if (mocIsValid || uicIsValid || rccIsValid) {
           // Create autogen target initializer
           Initializers_.emplace_back(cm::make_unique<cmQtAutoGenInitializer>(
-            this, target, qtVersion, moc, uic, rcc, globalAutoGenTarget,
-            globalAutoRccTarget));
+            this, target, qtVersion, mocIsValid, uicIsValid, rccIsValid,
+            globalAutoGenTarget, globalAutoRccTarget));
         }
       }
     }