Synchronize .pdb file writing, otherwise parallel builds
will fail, when different compiler instances try to access
the same .pdb file.
See also
http://msdn.microsoft.com/en-us/library/vstudio/dn502518.aspx
Change-Id: I4998f10458d320fd98d633eded02d90bf25ed884
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Add mkspec win32-msvc2013 and make VS 2013 known to configure and
qmake.
Change-Id: I6e63a4d679727a8a3f068f377956185996d72bce
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>