Commits on Oct 1, 2024

1. Bump version to 21.7.3

   

   github-actions[bot] committed Oct 1, 2024
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2. Add compile errors when built with unsupported wasm features (#1353) …

   ### What
   Add compile errors when built with unsupported wasm features
   reference-types and multivalue.
   
   ### Why
   Rust 1.82 is likely to ship with target feature reference-types and
   multivalue enabled on wasm builds. These target features are not
   supported by the Soroban Env in the current protocol 21 or next planned
   protocol 22. It's not trivial for developers to disable target features
   because of how the rustc compiler only exposes the ability to buildstd
   with nightly.
   
   These compile errors will prevent someone from building .wasm files with
   the sdk when either of those target features are enabled.
   
   A Rust version check is not being done because it's actually easier to
   do a target feature check, and in the off chain somehow Rust 1.82
   shipped without the target features enabled then the sdk could still be
   used with 1.82.
   
   Links:
   - https://discord.com/channels/897514728459468821/1289090985569026048
   - stellar/rs-soroban-env#1469
   - WebAssembly/tool-conventions#233
   
   ### Releasing
   This change will be merged to `main` targeting v22, then should be
   backported to a v21 patch release immediately following.
   
   (cherry picked from commit 6c45fb9)

   

   leighmcculloch committed Oct 1, 2024
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