iOS export of C++ GDExtension fails in 4.3-dev5

[ybin64]

Tested versions

Reproducable in 4.3-dev5, 4.3-dev [29b3d9e]
Works in 4.2.1

System information

Target iOS 17.4.1, build machine MacOS 14.4.1

Issue description

iOS export of a project with a C++ GDExtension fails in Godot 4.3-dev5.

I believe it's related to the following commit [iOS export] Improve .xcframework exporting.

I had 2 problems.

1. Link problem during export.

    ld: file cannot be mmap()ed, errno=22 path=godot-gdextension-test/dylibs/bin/libgdexample.ios.template_debug.universal.framework/libgdexample.ios.template_debug.universal in
       'godot-gdextension-test/dylibs/bin/libgdexample.ios.template_debug.universal.framework/libgdexample.ios.template_debug.universal'
    clang: error: linker command failed with exit code 1 (use -v to see invocation)

   Fixed in Fixed link error during export.

2. Runtime error on device, the libgdexample framework isn't found

   Caused by the problem 1 fix.

   dyld[6062]: Library not loaded: demo/bin/libgdexample.ios.template_debug.framework/libgdexample.ios.template_debug
     Referenced from: <C5B2228B-F230-351B-B46B-ECED5AACFCEB> /private/var/containers/Bundle/Application/7551DD31-129E-4BF8-8629-FB9A4A2915F9/godot-gdextension-test.app/godot-gdextension-test
     Reason: tried: 
       'demo/bin/libgdexample.ios.template_debug.framework/libgdexample.ios.template_debug' (no such file), 
       '/private/preboot/Cryptexes/OSdemo/bin/libgdexample.ios.template_debug.framework/libgdexample.ios.template_debug' (no such file), 
       'demo/bin/libgdexample.ios.template_debug.framework/libgdexample.ios.template_debug' (no such file)

   Fixed in Frameworks converted from .dylib are embedded as "CodeSignOnCopy" in the xcode projet

Both fixes are in the following branch. 4.3-dev-ios-gdextension-link-and-dylib-failure-fix but I'm pretty sure it's not the correct way to solve the problem, but may be useful for someone until the real fix.

Steps to reproduce

• Use 4.3-dev5 and the matching export templates

• Follow the instructions in gdextension_cpp_example

• Add the following lines to demo/bin/gdexample.gdextension

ios.debug = "res://bin/libgdexample.ios.template_debug.universal.dylib"
ios.release = "res://bin/libgdexample.ios.template_release.universal.dylib"

• Build the extension

• Export an iOS project, will fail with a link error during the export

 ld: file cannot be mmap()ed, errno=22 path=godot-gdextension-test/dylibs/bin/libgdexample.ios.template_debug.universal.framework/libgdexample.ios.template_debug.universal in
    'godot-gdextension-test/dylibs/bin/libgdexample.ios.template_debug.universal.framework/libgdexample.ios.template_debug.universal'
 clang: error: linker command failed with exit code 1 (use -v to see invocation)

Minimal reproduction project (MRP)

N/A

[rjgameiro]

Godot 4.3 RC3 seems to still be suffering from this problem.
Tried the exact same project (plain GDExtension example from Godot documentation) with Godot 4.2.2 and Godot 4.3 RC3, and while 4.2.2 succeeds, 4.3 RC3 fails on build on iOS with the error:

Ld /Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/InstallationBuildProductsLocation/Applications/amber.app/amber normal (in target 'amber' from project 'amber')
cd /Users/rgameiro/Temporary/iOS
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -Xlinker -reproducible -target arm64-apple-ios13.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS17.5.sdk -O0 -L/Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/IntermediateBuildFilesPath/EagerLinkingTBDs/Debug-iphoneos -L/Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/BuildProductsPath/Debug-iphoneos -L. -LMoltenVK.xcframework -Lamber -Lamber.xcframework -LMoltenVK.xcframework/ios-arm64 -LMoltenVK.xcframework/ios-arm64_x86_64-maccatalyst -LMoltenVK.xcframework/ios-arm64_x86_64-simulator -Lamber/dylibs -Lamber.xcframework/ios-arm64 -Lamber.xcframework/ios-arm64_x86_64-simulator -Lamber/dylibs/bin -F/Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/IntermediateBuildFilesPath/EagerLinkingTBDs/Debug-iphoneos -F/Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/BuildProductsPath/Debug-iphoneos -F. -FMoltenVK.xcframework -Famber -Famber.xcframework -FMoltenVK.xcframework/ios-arm64 -FMoltenVK.xcframework/ios-arm64_x86_64-maccatalyst -FMoltenVK.xcframework/ios-arm64_x86_64-simulator -Famber/dylibs -Famber.xcframework/ios-arm64 -Famber.xcframework/ios-arm64_x86_64-simulator -Famber/dylibs/bin -filelist /Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/IntermediateBuildFilesPath/amber.build/Debug-iphoneos/amber.build/Objects-normal/arm64/amber.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -dead_strip -Xlinker -object_path_lto -Xlinker /Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/IntermediateBuildFilesPath/amber.build/Debug-iphoneos/amber.build/Objects-normal/arm64/amber_lto.o -Xlinker -no_deduplicate -Xlinker -final_output -Xlinker /Applications/amber.app/amber -stdlib\=libc++ -lMoltenVK -lgodot -framework libgdexample.ios.template_debug.universal -Xlinker -no_adhoc_codesign -Xlinker -dependency_info -Xlinker /Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/IntermediateBuildFilesPath/amber.build/Debug-iphoneos/amber.build/Objects-normal/arm64/amber_dependency_info.dat -o /Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/InstallationBuildProductsLocation/Applications/amber.app/amber
ld: file cannot be mmap()ed, errno=22 path=amber/dylibs/bin/libgdexample.ios.template_debug.universal.framework/libgdexample.ios.template_debug.universal in 'amber/dylibs/bin/libgdexample.ios.template_debug.universal.framework/libgdexample.ios.template_debug.universal'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
** ARCHIVE FAILED **
The following build commands failed.
Ld /Users/rgameiro/Library/Developer/Xcode/DerivedData/amber-geepphvxiicnsegpcjbqlufrernb/Build/Intermediates.noindex/ArchiveIntermediates/amber/InstallationBuildProductsLocation/Applications/amber.app/amber normal (in target 'amber' from project 'amber')
(1 failure)

This is what is getting exported by Godot 4.2.2 (for the GDExtension iOS framework):

This is what is getting exported by Godot 4.3RC3:

Also, the contents of the Info.plist files:

Good Info.plist (Godot 4.2.2)

Bad Info.plist (Godot 4.3RC3)

I can provide more details if asked.

[akien-mga]

Could you attach the reproduction project to make testing easier? I know it's derived from our docs but it takes time to reproduce all the setup from the docs. You can remove the compiled objects/libs to keep size low.

CC @bruvzg

[rjgameiro]

Here goes... building extension with:
scons platform=ios custom_api_file=./godot-cpp/extension_api.json
...which was exported from Godot 4.3 RC3.
Removed AppStore Team ID from export settings.

gdextension_cpp_example.zip

[bruvzg]

Most likely something wrong with extension packaging, see generate_xcframework.sh in the https://github.com/godotengine/godot-cpp/tree/master/test as an example of building and packing GDExtension for iOS.

In the exported project should look like this:

Running on a device:

[fatduckling]

I managed to work around this problem by changing my dylibs to the framework format.
Something like:

xcodebuild -create-xcframework -library libtbb.dylib -output Tbb.xcframework
xcodebuild -create-xcframework -library libtbbmalloc.dylib -output TbbMalloc.xcframework

And in the .gdextension file:

...
[dependencies]

ios.arm64 = {
    "res://bin/libtbb.xcframework": "",
    "res://bin/libtbbmalloc.xcframework": "",
...