If I configure and build Qt 5.4.0 or 5.4.1 from source, and use the following command lines:
configure.bat -release -platform win32-msvc2013 -plugin-sql-sqlite -opensource -confirm-license -target xp -mp
make
make install

everything works correctly without errors.
but if I change configure command line adding "-prefix" parameter, it fails:

configure.bat -prefix %DIR_BIN% -release -platform win32-msvc2013 -plugin-sql-sqlite -opensource -confirm-license -target xp -mp

build log has the following errors:

IDL generation failed trying to run program release\comapp.exe!
midl : command line error MIDL1003 : error returned by the C preprocessor (2)
c1 : fatal error C1083: Cannot open source file: '.obj\release\comapp.idl': No such file or directory
Couldn't open .obj\release\comapp.tlb for read
Failed to register server!

I am completely sure that "midl.exe" is in the path in both cases (I can execute it successfully in same cmd.exe instance). so it sounds like configure bug.

see also attached logs (zipped due to large size).