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Use CONSOLE subsystem entry points; update link

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Philipp Oppermann
2018-03-14 18:22:13 +01:00
parent 8d312293b1
commit 6599a6935f
1 changed files with 6 additions and 4 deletions
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blog/content/second-edition/posts/01-freestanding-rust-binary/index.md
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@@ -261,16 +261,18 @@ One way to pass linker attributes via cargo is the `cargo rustc` command. The co
With this command, our crate finally builds as a freestanding executable!
#### Windows
On Windows, the linker requires two entry points: `WinMain` and `WinMainCRTStartup`, [depending on the used subsystem](https://msdn.microsoft.com/en-us/library/f9t8842e.aspx). Like on Linux, we overwrite the entry points by defining `no_mangle` functions:
On Windows, the linker requires two entry points [depending on the used subsystem]. For the `CONSOLE` subsystem, we need a function called `mainCRTStartup`, which calls a function called `main`. Like on Linux, we overwrite the entry points by defining `no_mangle` functions:
[depending on the used subsystem]: https://docs.microsoft.com/en-us/cpp/build/reference/entry-entry-point-symbol
```rust
#[no_mangle]
pub extern fn WinMainCRTStartup() -> ! {
WinMain();
pub extern fn mainCRTStartup() -> ! {
main();
}
#[no_mangle]
pub extern fn WinMain() -> ! {
pub extern fn main() -> ! {
loop {}
}
```