No. The most likely reason in your case is the build system of the library you want to build uses some mix of POSIX shell script and GNU Make, which is ... har

No. The most likely reason in your case is the build system of the library you want to build uses some mix of POSIX shell script and GNU Make, which is ... hard to get right on Windows. It's not C/C++ specific, through installing a cross C compiler on Windows might involve more work than rustup add target (or not, if someone did the work and packaged the toolchain as .exe installer).