commit b1b5004c1a00b123170724dd3a2d8c024f72684a
author Sebastian Holtermann <sebholt@xwmw.org> Tue Nov 27 10:50:49 2018 +0100
committer Brad King <brad.king@kitware.com> Tue Nov 27 08:21:40 2018 -0500
tree 0d86f53f029a1e94ffe5f33b5dab50bc3243a583
parent 05a2ca7f87b9ae73f373e9967fde1ee5210e33af

Autogen: Fix empty uic executable string

In CMake 3.13.0 when a target has ``AUTOUIC`` enabled but doesn't
link against Qt5Widgets, the uic executable string is empty and
an error string "The uic executable \"\" does not exist" is generated.
In CMake 3.12 ``AUTOUIC`` was silently disabled instead.
This patch fixes the regression and restores the behavior of CMake 3.12.

Fixes: #18630

Source/cmQtAutoGenInitializer.cxx

diff --git a/Source/cmQtAutoGenInitializer.cxx b/Source/cmQtAutoGenInitializer.cxx
index 8a202a2..ba7a565 100644
--- a/Source/cmQtAutoGenInitializer.cxx
+++ b/Source/cmQtAutoGenInitializer.cxx
@@ -1409,7 +1409,7 @@
   }
 
   // Test uic command
-  if (err.empty()) {
+  if (err.empty() && !this->Uic.Executable.empty()) {
     if (cmSystemTools::FileExists(this->Uic.Executable, true)) {
       std::vector<std::string> command;
       command.push_back(this->Uic.Executable);