Native iOS lib seems to be trimmed when Release build used

[AncientLust]

Hi, I'm trying to use native iOS library lib.a in MAUI.

It works well in Debug build, but when I try to build Release I see Undefined symbols for architecture arm64 errors.

I saw these errors previously, they appear when you try for example run iOS simulator with arm64 library while you need to use arm64-sim. Now I have both .a libraries for simulator and device and they both work in Debug mode (have to switch libs if device type is switched). I can reproduce the same errors in debug mode if I use lib-sim with physical device and vice-versa.

How lib connected to app:

<PropertyGroup Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">
    <AdditionalArgs>-cxx -gcc_flags "-L${ProjectDir} -iosLib -force_load ${ProjectDir}/iosLib.a"</AdditionalArgs>
</PropertyGroup>

<ItemGroup Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">
    <NativeReference Include="Platforms\iOS\libs\device\iosLib.a" Kind="Static">
        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
    </NativeReference>
</ItemGroup>

What I tried:

1. Obviously tried to clean bin and obj folders.
2. Put the lib into <MtouchInterpreter>iosLib</MtouchInterpreter> with <Optimize>false</Optimize>.
3. With <MtouchLink>None</MtouchLink> project builds without errors (way longer), but cannot start.

The questions are:

1. Should I file a bug?
2. Are there some other processes I don't see when switching to Relese which can trim the lib?
3. Do I have a right unrestanding that if I have no problems using the lib on ios device and simulator I shouldn't have them building for Release?

[AncientLust]

You just have to look carefully through build output. I found that Accelerate framework was automatically linked for debug, but missed for release. Had to link it manually for release:

<PropertyGroup Condition="'$(Configuration)' == 'Release' and $(RuntimeIdentifier) == 'ios-arm64'">
    <MtouchExtraArgs>--gcc_flags "-framework Accelerate"</MtouchExtraArgs>
</PropertyGroup>