[CP] [dart2wasm] Make dart compile wasm compiled apps disable dart.library.ffi
#55979
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area-dart2wasm
Issues for the dart2wasm compiler.
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mkustermann
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/cc @athomas for awareness If flutter also releases a new stable with this CP in, it may need to cherry-pick:
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sgtm |
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LGTM |
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The CL landed. |
copybara-service bot
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Jun 11, 2024
…dart.library.ffi`
This is a follow-up to [0]. That CL changed dart2wasm's modular
transformer to issue an error if `dart:ffi` is imported.
Users of packages that have specialized code for the VM (which supports
FFI) use conditional imports based on `dart.library.ffi`. We don't want
the VM-specific code to be used for web in dart2wasm (as dart2wasm
doesn't support the entirety of `dart:ffi`).
As a result we're going to make `dart.library.ffi` be false in
coditional imports (as well as in
`const bool.fromEnvironment('dart.library.ffi')`).
[0] https://dart-review.googlesource.com/c/sdk/+/368568
Bug: #55948
Bug: flutter/flutter#149984
Cherry-pick: https://dart-review.googlesource.com/c/sdk/+/370580
Cherry-pick-request: #55979
Change-Id: Ia968bacf92566d421606fc026c7f016fe5abff01
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/370880
Reviewed-by: Slava Egorov <[email protected]>
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I believe this was released yesterday with |
christopherfujino
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Jul 12, 2024
# Flutter stable 3.22.3 Engine ## Scheduled Cherrypicks - Roll dart revision: dart-lang/sdk@604651494 ### Dart - dart-lang/sdk#55979 - dart-lang/sdk#55943 ### Engine - flutter/flutter#149700 - flutter/flutter#149701 - flutter/flutter#149702 - flutter/flutter#149704 - flutter/flutter#149745 - flutter/flutter#149771 - #53183 --------- Co-authored-by: Martin Kustermann <[email protected]> Co-authored-by: Jackson Gardner <[email protected]> Co-authored-by: Christopher Fujino <[email protected]>
This was referenced Jul 18, 2024
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Commit(s) to merge
847c356
Target
stable
Prepared changelist for beta/stable
https://dart-review.googlesource.com/c/sdk/+/370880
Issue Description
Packages on pub use conditional imports that branch on
dart.library.ffi. The ffi-specific code is meant to be run on the VM. Unfortunately currently this also evaluates totruein dart2wasm, which makes apps that work with dart2js not work with dart2wasm due to different evaluation of the conditional import.What is the fix
Change dart2wasm to make this conditional import evaluate to
false.Why cherry-pick
Users are hitting this when using
package:flutter_svgwhich usespackage:vector_graphics_compilerwhich uses `dart:ffi.Risk
As always: If CI passes the risk is low.
Issue link(s)
#55948
Extra Info
No response
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