VM binaries for OS X no longer exporting embedding API symbols

[DartBot]

This issue was originally filed by [email protected]

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Updating an extension for M1, I encountered a load-time error on OS X, while things continue to work on Linux and Windows.

rmacnak$ ~/Applications/dart-sdk/bin/dart Hello.dart
dyld: lazy symbol binding failed: Symbol not found: _Dart_IsError
  Referenced from: /Users/rmacnak/Code/Newspeak/libns2dart_extension.dylib
  Expected in: flat namespace

dyld: Symbol not found: _Dart_IsError
  Referenced from: /Users/rmacnak/Code/Newspeak/libns2dart_extension.dylib
  Expected in: flat namespace

Trace/BPT trap: 5

Based on the archived binaries at https://gsdview.appspot.com/dart-editor-archive-integration/, this has broken sometime between r13122 and r13391.

(r13122)
rmacnak$ nm dart | grep Dart_IsError
00007c60 T _Dart_IsError

(r13391)
rmacnak$ nm dart | grep Dart_IsError
<nothing>

[gbracha]

Added Area-VM, Triaged labels.

[ghost]

It is probably the r13298, see also issue. Assigning to Mads to see how/if we can/should export API symbols.

See issue #5544.

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cc @madsager.
cc @iposva-google.

[madsager]

I have seen issues like this if the dart binary has been built for SDK 10.5 but the extension has been built for SDK 10.7 or the other way around. Which version of MacOS are you on?

[iposva-google]

Set owner to @iposva-google.
Added this to the M2 milestone.
Added Accepted label.

[iposva-google]

From man strip on Mac OS X:
       For dynamic shared libraries, the maximum level of stripping is usually
       -x (to remove all non-global symbols).

Since the dart binary is exporting symbols like a shared library it needs to pass the -x option to the strip command when creating the SDK.

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cc @dgrove.

[iposva-google]

Fixed with r15504.

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Added Fixed label.