I'm trying to install flext externals for Pd under WinXP compilation with MinGW. When trying to build I've got this error message:

mingw32-make[1]: *** No rule to make target
`pd-mingw\release-single/flbase.opp', needed by
`pd-mingw\release-single\libflext-pd_s.a'. Stop.
mingw32-make: *** [build-release-single] Error 2

Does anyone know what about it is? Do I need a flbase.opp file? I can't find it

Thank you