moc @<file> feature fails if <file> contains cyrillic (UTF-8) symbols

Probably it affects Qt5 too.

moc fails if file name contains cyrillic parts(my locale is ru_RU.UTF-8). Example:

/usr/lib64/qt4/bin/moc-qt4 @/home/lyokha/Загрузки/geant4.10.00-build/source/interfaces/basic/include/moc_G4UIQt.cxx_parameters
moc: Cannot open options file specified with @
Usage: moc [options] <header-file>
-o<file> write output to file rather than stdout
-I<dir> add dir to the include path for header files
-E preprocess only; do not generate meta object code
-D<macro>[=<def>] define macro, with optional definition
-U<macro> undefine macro
-i do not generate an #include statement
-p<path> path prefix for included file
-f[<file>] force #include, optional file name
-nn do not display notes
-nw do not display warnings
@<file> read additional options from file
-v display version of moc

The file exists and has russian part in its path (Загрузки). Looks like the issue arises from using unneeded QString::fromLatin1() call in src/tools/moc/main.cpp at line 212 where a QFile object is created. It seems that this conversion is not needed in this case as soon as this value is passed from console arguments.

A simple patch could be:

— tools/moc/main.cpp 2013-06-07 09:17:00.000000000 +0400
+++ tools/moc/main.cpp.new 2013-12-09 19:25:22.709456297 +0400
@@ -209,7 +209,7 @@
optionsFile.remove(0, 1);
if (optionsFile.isEmpty())
error("The @ option requires an input file");

• QFile f(QString::fromLatin1(optionsFile.constData()));
  + QFile f(optionsFile.constData());
  if (!f.open(QIODevice::ReadOnly | QIODevice::Text))
  error("Cannot open options file specified with @");
  argv.remove;

but i did not check this solution.