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Add workaround for VaList being generated in v(f)printf #40

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Feb 5, 2024
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Add workaround for VaList being generated in v(f)printf #40

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7 changes: 7 additions & 0 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -486,6 +486,13 @@ fn main() {
.to_string();
}

// On 64-bit native, what gets emitted as vprintf(_, _, _: __builtin_va_list) gets emitted as
// vprintf(_, _, _: core::ffi::VaList), which is unsupported in stable -- but we don't use that
// function, it's just an unfortunate side effect of --preserve-unused-functions. This quick
// workaround enables building and ensures that the function is never called.
rustcode = rustcode.replace("::core::ffi::VaList", "::core::convert::Infallible");
rustcode = rustcode.replace("__arg.as_va_list()", "__arg");

// Replace the function declarations with ... usually something pub, but special considerations
// may apply
let mut rustcode_functionsreplaced = String::new();
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