9a6b0c3326
Fix cross-compiling with dlltool for raw-dylib Fix for #103939 Issue Details: When attempting to cross-compile using the `raw-dylib` feature and the GNU toolchain, rustc would attempt to find a cross-compiling version of dlltool (e.g., `i686-w64-mingw32-dlltool`). The has two issues 1) on Windows dlltool is always `dlltool` (no cross-compiling named versions exist) and 2) it only supported compiling to i686 and x86_64 resulting in ARM 32 and 64 compiling as x86_64. Fix Details: * On Windows always use the normal `dlltool` binary. * Add the ARM64 cross-compiling dlltool name (support for this is coming: https://sourceware.org/bugzilla/show_bug.cgi?id=29964) * Provide the `-m` argument to dlltool to indicate the target machine type. (This is the first of two PRs to fix the remaining issues for the `raw-dylib` feature (#58713) that is blocking stabilization (#104218))
The codegen crate contains the code to convert from MIR into LLVM IR,
and then from LLVM IR into machine code. In general it contains code
that runs towards the end of the compilation process.
For more information about how codegen works, see the rustc dev guide.