The prefixed x86_64-w64-mingw32-ar doesn't exist on windows. Since this is a common issue with mingw utilities on windows distributions, another example being windres, I have created a macro MAYBE_PREFIXED to prefix binaries when running on non windows hosts.
The prefixed
x86_64-w64-mingw32-ardoesn't exist on windows. Since this is a common issue with mingw utilities on windows distributions, another example beingwindres, I have created a macroMAYBE_PREFIXEDto prefix binaries when running on non windows hosts.Closes #99