QtAutogen: Regenerate qrc files if their input changes (#15074)

Get dependencies from the output of ``rcc --list`` if using
Qt 5.  Otherwise process the file in the same way as the
qt4_add_resources macro.

This does not work for RCC files which are generated.

The cmake_autogen build step is implemented as a PRE_BUILD step
of the target currently if possible, rather than a standalone
custom target.  This is to keep the number of (synthesized)
custom targets that appear in the UI low, but in some cases
it is necessary to fall back to a full custom target.

Fall back to a full custom target for the VS builds if autorcc
is used.

1 files changed, 10 insertions, 0 deletions

diff --git a/Source/cmQtAutoGenerators.h b/Source/cmQtAutoGenerators.h
index ce27852..79fa5df 100644
--- a/Source/cmQtAutoGenerators.h
+++ b/Source/cmQtAutoGenerators.h
@@ -88,6 +88,15 @@ private:
 
   std::string GetRccExecutable(cmTarget const* target);
 
+  std::string ListQt5RccInputs(cmSourceFile* sf, cmTarget const* target,
+                               std::vector<std::string>& depends);
+
+  std::string ListQt4RccInputs(cmSourceFile* sf,
+                               std::vector<std::string>& depends);
+
+  bool InputFilesNewerThanQrc(const std::string& qrcFile,
+                              const std::string& rccOutput);
+
   std::string QtMajorVersion;
   std::string Sources;
   std::vector<std::string> RccSources;
@@ -118,6 +127,7 @@ private:
   std::vector<std::string> UicTargetOptions;
   std::map<std::string, std::string> UicOptions;
   std::map<std::string, std::string> RccOptions;
+  std::map<std::string, std::vector<std::string> > RccInputs;
 
   bool Verbose;
   bool ColorOutput;