Cross-compiling tor rust for Windows is broken

I managed to cross-compile at least a rust compiler for 64bit Windows but tor is not prepared for that:

x86_64-w64-mingw32-gcc  -mwindows -fstack-protector-all -Wstack-protector --param ssp-buffer-size=4 -fno-strict-overflow -Wno-missing-field-initializers -Wformat -Wformat-security -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-all -Wstack-protector --param ssp-buffer-size=1 -fasynchronous-unwind-tables -Wall -fno-strict-aliasing -Waddress -Warray-bounds -Wdate-time -Wdouble-promotion -Wduplicated-cond -Wextra -Wfloat-conversion -Wignored-attributes -Winit-self -Wlogical-op -Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-noreturn -Wnormalized=nfkc -Wnull-dereference -Woverlength-strings -Woverride-init -Wshadow -Wshift-count-negative -Wshift-count-overflow -Wshift-negative-value -Wshift-overflow=2 -Wsizeof-array-argument -Wstrict-overflow=1 -Wsuggest-attribute=format -Wsuggest-attribute=noreturn -Wswitch-bool -Wsync-nand -Wtrampolines -Wunused-but-set-parameter -Wunused-but-set-variable -Wunused-const-variable=2 -Wunused-local-typedefs -Wvariadic-macros -W -Wfloat-equal -Wundef -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2 -Wwrite-strings -Wnested-externs -Wbad-function-cast -Wswitch-enum -Waggregate-return -Wpacked -Wunused -Wunused-parameter  -Wold-style-definition -Wmissing-declarations  -mwindows -Wl,--dynamicbase -Wl,--nxcompat -Wl,--enable-reloc-section -lssp -L/var/tmp/dist/mingw-w64/gcclibs -Wl,--nxcompat -Wl,--dynamicbase -o src/tools/tor-resolve.exe src/tools/tor-resolve.o src/common/libor.a src/common/libor-ctime.a ./src/rust/target/release/tor_rust.lib  -lws2_32 -luserenv  
x86_64-w64-mingw32-gcc: error: ./src/rust/target/release/tor_rust.lib: No such file or directory

We don't want to have a *lib file I think. What we get instead when cross-compiling (libtor_rust.a) looks actually promising.