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-rw-r--r--src/doc/unstable-book/src/language-features/extended-varargs-abi-support.md10
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+# `extended_varargs_abi_support`
+
+The tracking issue for this feature is: [#100189]
+
+[#100189]: https://github.com/rust-lang/rust/issues/100189
+
+------------------------
+
+This feature adds the possibility of using `sysv64`, `win64` or `efiapi` calling
+conventions on functions with varargs.