Explicit extern "C" ABI for FFI#520
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JohnTitor merged 1 commit intorust-lang:masterfrom Feb 26, 2026
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See also [`items.extern.abi.default`][1]. > If the ABI string is not specified, it defaults to `"C"`. > The `extern` syntax without an explicit ABI is being phased out, so > it’s better to always write the ABI explicitly. > > For more details, see Rust issue [#134986][]. [1]: https://doc.rust-lang.org/reference/items/external-blocks.html#r-items.extern.abi.default [#134986]: rust-lang/rust#134986
JohnTitor
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JonathanBrouwer
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Update books ## rust-embedded/book 4 commits in 99d0341ff4e06757490af8fceee790c4ede50bc0..e88aa4403b4bf2071c8df9509160477e40179099 2026-02-28 20:13:44 UTC to 2026-02-28 20:07:25 UTC - Clarify that a mini usb cable is used on the STM32F3DISCOVERY (rust-embedded/book#381) - Update outdated qemu documentation (rust-embedded/book#403) - Add TRACE32 to Debuggers section (rust-embedded/book#406) - Add a link to Rust for Zephyr (rust-embedded/book#407) ## rust-lang/nomicon 4 commits in b8f254a991b8b7e8f704527f0d4f343a4697dfa9..cc6a6bae8c3bfa389974e533c54694662c1a9de6 2026-02-27 23:27:18 UTC to 2026-02-26 22:57:03 UTC - Fix `Vec::push_all` ptr code in exception-safety (rust-lang/nomicon#418) - Clarify parameter and argument compatibility (rust-lang/nomicon#516) - Improve grammar in Variance section (rust-lang/nomicon#515) - Explicit `extern "C"` ABI for FFI (rust-lang/nomicon#520) ## rust-lang/reference 7 commits in 50a1075e879be75aeec436252c84eef0fad489f4..c49e89cc8c7c2c43ca625a8d5b7ad9a53a9ce978 2026-03-04 15:39:00 UTC to 2026-03-01 06:34:18 UTC - Resolve grammar rules in link reference definitions (rust-lang/reference#2198) - Support non-ASCII Unicode in grammar rule names (rust-lang/reference#2196) - Fix grammar for block comments (rust-lang/reference#2191) - Fix an EN grammar error & add an item to place expr context list (rust-lang/reference#2189) - Align attribute template with applied conventions (rust-lang/reference#2194) - Update shebang (rust-lang/reference#2192) - Remove RESERVED_NUMBER (rust-lang/reference#2193)
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Update books ## rust-embedded/book 4 commits in 99d0341ff4e06757490af8fceee790c4ede50bc0..e88aa4403b4bf2071c8df9509160477e40179099 2026-02-28 20:13:44 UTC to 2026-02-28 20:07:25 UTC - Clarify that a mini usb cable is used on the STM32F3DISCOVERY (rust-embedded/book#381) - Update outdated qemu documentation (rust-embedded/book#403) - Add TRACE32 to Debuggers section (rust-embedded/book#406) - Add a link to Rust for Zephyr (rust-embedded/book#407) ## rust-lang/nomicon 4 commits in b8f254a991b8b7e8f704527f0d4f343a4697dfa9..cc6a6bae8c3bfa389974e533c54694662c1a9de6 2026-02-27 23:27:18 UTC to 2026-02-26 22:57:03 UTC - Fix `Vec::push_all` ptr code in exception-safety (rust-lang/nomicon#418) - Clarify parameter and argument compatibility (rust-lang/nomicon#516) - Improve grammar in Variance section (rust-lang/nomicon#515) - Explicit `extern "C"` ABI for FFI (rust-lang/nomicon#520) ## rust-lang/reference 7 commits in 50a1075e879be75aeec436252c84eef0fad489f4..c49e89cc8c7c2c43ca625a8d5b7ad9a53a9ce978 2026-03-04 15:39:00 UTC to 2026-03-01 06:34:18 UTC - Resolve grammar rules in link reference definitions (rust-lang/reference#2198) - Support non-ASCII Unicode in grammar rule names (rust-lang/reference#2196) - Fix grammar for block comments (rust-lang/reference#2191) - Fix an EN grammar error & add an item to place expr context list (rust-lang/reference#2189) - Align attribute template with applied conventions (rust-lang/reference#2194) - Update shebang (rust-lang/reference#2192) - Remove RESERVED_NUMBER (rust-lang/reference#2193)
matthiaskrgr
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Mar 9, 2026
Update books ## rust-embedded/book 4 commits in 99d0341ff4e06757490af8fceee790c4ede50bc0..e88aa4403b4bf2071c8df9509160477e40179099 2026-02-28 20:13:44 UTC to 2026-02-28 20:07:25 UTC - Clarify that a mini usb cable is used on the STM32F3DISCOVERY (rust-embedded/book#381) - Update outdated qemu documentation (rust-embedded/book#403) - Add TRACE32 to Debuggers section (rust-embedded/book#406) - Add a link to Rust for Zephyr (rust-embedded/book#407) ## rust-lang/nomicon 4 commits in b8f254a991b8b7e8f704527f0d4f343a4697dfa9..cc6a6bae8c3bfa389974e533c54694662c1a9de6 2026-02-27 23:27:18 UTC to 2026-02-26 22:57:03 UTC - Fix `Vec::push_all` ptr code in exception-safety (rust-lang/nomicon#418) - Clarify parameter and argument compatibility (rust-lang/nomicon#516) - Improve grammar in Variance section (rust-lang/nomicon#515) - Explicit `extern "C"` ABI for FFI (rust-lang/nomicon#520) ## rust-lang/reference 7 commits in 50a1075e879be75aeec436252c84eef0fad489f4..c49e89cc8c7c2c43ca625a8d5b7ad9a53a9ce978 2026-03-04 15:39:00 UTC to 2026-03-01 06:34:18 UTC - Resolve grammar rules in link reference definitions (rust-lang/reference#2198) - Support non-ASCII Unicode in grammar rule names (rust-lang/reference#2196) - Fix grammar for block comments (rust-lang/reference#2191) - Fix an EN grammar error & add an item to place expr context list (rust-lang/reference#2189) - Align attribute template with applied conventions (rust-lang/reference#2194) - Update shebang (rust-lang/reference#2192) - Remove RESERVED_NUMBER (rust-lang/reference#2193)
rust-timer
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Mar 10, 2026
Rollup merge of #153619 - rustbot:docs-update, r=ehuss Update books ## rust-embedded/book 4 commits in 99d0341ff4e06757490af8fceee790c4ede50bc0..e88aa4403b4bf2071c8df9509160477e40179099 2026-02-28 20:13:44 UTC to 2026-02-28 20:07:25 UTC - Clarify that a mini usb cable is used on the STM32F3DISCOVERY (rust-embedded/book#381) - Update outdated qemu documentation (rust-embedded/book#403) - Add TRACE32 to Debuggers section (rust-embedded/book#406) - Add a link to Rust for Zephyr (rust-embedded/book#407) ## rust-lang/nomicon 4 commits in b8f254a991b8b7e8f704527f0d4f343a4697dfa9..cc6a6bae8c3bfa389974e533c54694662c1a9de6 2026-02-27 23:27:18 UTC to 2026-02-26 22:57:03 UTC - Fix `Vec::push_all` ptr code in exception-safety (rust-lang/nomicon#418) - Clarify parameter and argument compatibility (rust-lang/nomicon#516) - Improve grammar in Variance section (rust-lang/nomicon#515) - Explicit `extern "C"` ABI for FFI (rust-lang/nomicon#520) ## rust-lang/reference 7 commits in 50a1075e879be75aeec436252c84eef0fad489f4..c49e89cc8c7c2c43ca625a8d5b7ad9a53a9ce978 2026-03-04 15:39:00 UTC to 2026-03-01 06:34:18 UTC - Resolve grammar rules in link reference definitions (rust-lang/reference#2198) - Support non-ASCII Unicode in grammar rule names (rust-lang/reference#2196) - Fix grammar for block comments (rust-lang/reference#2191) - Fix an EN grammar error & add an item to place expr context list (rust-lang/reference#2189) - Align attribute template with applied conventions (rust-lang/reference#2194) - Update shebang (rust-lang/reference#2192) - Remove RESERVED_NUMBER (rust-lang/reference#2193)
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See also
items.extern.abi.default.