Autogen: Pass explicit predefines header to moc if possible

Qt is relying on whoever calls moc to include a file with the predefined
values that will be used by the compiler, otherwise moc takes wrong
paths and weird things happen.
Instead, generate an include file and feed it to all mocs to make sure
it's generating correct code.

Co-Author: Sebastian Holtermann <sebholt@xwmw.org>
Fixes: #16640

1 files changed, 6 insertions, 2 deletions

diff --git a/Source/cmQtAutoGenerators.h b/Source/cmQtAutoGenerators.h
index ee046de..cb6f45a 100644
--- a/Source/cmQtAutoGenerators.h
+++ b/Source/cmQtAutoGenerators.h
@@ -142,8 +142,8 @@ private:
                              const char* basePrefix,
                              const char* baseSuffix) const;
   bool MakeParentDirectory(const std::string& filename) const;
-  bool RunCommand(const std::vector<std::string>& command,
-                  std::string& output) const;
+  bool RunCommand(const std::vector<std::string>& command, std::string& output,
+                  bool verbose = true) const;
 
   bool FindHeader(std::string& header, const std::string& testBasePath) const;
 
@@ -176,6 +176,8 @@ private:
   // - Moc
   std::string MocCppFilenameRel;
   std::string MocCppFilenameAbs;
+  std::string MocPredefsFileRel;
+  std::string MocPredefsFileAbs;
   std::vector<std::string> MocSkipList;
   std::vector<std::string> MocIncludePaths;
   std::vector<std::string> MocIncludes;
@@ -197,6 +199,8 @@ private:
   MacroFilter MacroFilters[2];
   cmsys::RegularExpression RegExpMocInclude;
   cmsys::RegularExpression RegExpUicInclude;
+  // - moc_predefs
+  std::vector<std::string> MocPredefsCmd;
   // - Flags
   bool IncludeProjectDirsBefore;
   bool Verbose;