The

GetFileVersionInfoSizeW

function is in the

platform.windows.*

package, but why am I getting

lld-link: error: undefined symbol: GetFileVersionInfoSizeW

?

Thanks it works.

When you see this type of error in general, the issue is that headers are just a ‘promise’ of what symbols exist. To actually have the symbols, you need to link against some binary. Generally, every cinterop should have headers and linker flags.