From 8ac7abb78d97210c5cbbc87fba83d58d7b843a8d Mon Sep 17 00:00:00 2001
From: Aleix Pol <aleixpol@kde.org>
Date: Tue, 26 Jul 2016 14:06:56 +0200
Subject: Add a fallback method for query_qmake() when there's no Qt5
 installation

Addresses its usage on systems where Qt5 isn't installed, it allows for
modules using it to decide what they should do.

REVIEW: 128488
---
 modules/ECMQueryQmake.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/ECMQueryQmake.cmake b/modules/ECMQueryQmake.cmake
index 8f4cf177..0a3129d4 100644
--- a/modules/ECMQueryQmake.cmake
+++ b/modules/ECMQueryQmake.cmake
@@ -9,6 +9,11 @@ set(QMAKE_EXECUTABLE ${_qmake_executable_default}
 
 # This is not public API (yet)!
 function(query_qmake result_variable qt_variable)
+    if(NOT QMAKE_EXECUTABLE)
+        set(${result_variable} "" PARENT_SCOPE)
+        message(WARNING "Should specify a qmake Qt5 binary. Can't check ${qt_variable}")
+        return()
+    endif()
     execute_process(
         COMMAND ${QMAKE_EXECUTABLE} -query "${qt_variable}"
         RESULT_VARIABLE return_code
-- 
cgit v1.2.1