IOS Llvm never finishes

[JanettHolst290490]

Steps to Reproduce

1. Have a Xamarin.IOS project with a shared library (.NET Standard 2.0)
2. Set the IOS project as startup, run a release configuration with the following configuration:

Shared Library:

    <IntermediateOutputPath>obj\iPhone\Release</IntermediateOutputPath>
    <DebugType></DebugType>
    <Optimize>true</Optimize>
    <OutputPath>...</OutputPath>
    <DefineConstants>...</DefineConstants>
    <NoWarn></NoWarn>
    <NoStdLib>false</NoStdLib>

IOS project:

    <Optimize>true</Optimize>
    <OutputPath>...</OutputPath>
    <DefineConstants>...</DefineConstants>
    <WarningLevel>4</WarningLevel>
    <CodesignKey>iPhone Distribution</CodesignKey>
    <MtouchFloat32>true</MtouchFloat32>
    <CodesignEntitlements>Entitlements-prod.plist</CodesignEntitlements>
    <MtouchLink>SdkOnly</MtouchLink>
    <MtouchArch>ARMv7s, ARM64</MtouchArch>
    <MtouchHttpClientHandler>HttpClientHandler</MtouchHttpClientHandler>
    <MtouchVerbosity></MtouchVerbosity>
    <CodesignProvision>Automatic:AdHoc</CodesignProvision>
    <BuildIpa>true</BuildIpa>
    <MtouchUseLlvm>true</MtouchUseLlvm>

3. OR run the following in the command line:

msbuild AulaNative.iOS.csproj /p:Configuration="Release" /p:Platform="iPhone" /p:MTouchLink="SdkOnly" /p:BuildIpa=true /t:Clean,Build

Expected Behavior

The build finishes successfully or finishes and tells me why it fails.

Actual Behavior

It never finishes (I tried waiting for 90 minutes)
In the console log it never gets past the "_CompileToNative" step.

...

_CompileAppManifest:
  Directory "bin/iPhone/Release/AulaNative.iOS.app.dSYM" doesn't exist. Skipping.
_ParseExtraMtouchArgs:
    NoSymbolStrip Output: False
    NoDSymUtil Output: false
_CompileToNative:
  /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/bin/mtouch @/Users/[user]/workspace/mobile-app/application/[project]/iOS/obj/iPhone/Release/response-file.rsp 

However, if I run it with

<MtouchUseLlvm>false</MtouchUseLlvm>

then it works fine.

Environment

=== Visual Studio Enterprise 2019 for Mac ===

Version 8.2.4 (build 17)
Installation UUID: 4c2dc437-7869-4392-9b24-f24a2c4f02e7
	GTK+ 2.24.23 (Raleigh theme)
	Xamarin.Mac 5.14.0.85 (d16-2-fix-mac-updates / 86973979)

	Package version: 600000327

=== Mono Framework MDK ===

Runtime:
	Mono 6.0.0.327 (2019-02/f8ea05bddcb) (64-bit)
	Package version: 600000327

=== NuGet ===

Version: 5.1.0.6013

=== .NET Core ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
	2.1.12
	2.1.11
	2.1.9
	2.1.8
	2.1.2
	2.1.1
	2.0.5
	2.0.0
SDK: /usr/local/share/dotnet/sdk/2.1.701/Sdks
SDK Versions:
	2.1.701
	2.1.700
	2.1.505
	2.1.504
	2.1.302
	2.1.301
	2.1.4
	2.0.0
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/6.0.0/lib/mono/msbuild/Current/bin/Sdks

=== Xamarin.Profiler ===

Version: 1.6.11
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Updater ===

Version: 11

=== Xamarin.Android ===

Version: 9.4.1.0 (Visual Studio Enterprise)
Commit: xamarin-android/d16-2/ebd65c9
Android SDK: /Users/janettholst/Library/Developer/Xamarin/android-sdk-macosx
	Supported Android versions:
		8.0 (API level 26)
		8.1 (API level 27)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 29.0.1
SDK Build Tools Version: 29.0.1

Build Information: 
Mono: mono/mono/2019-02@e6f5369c2d2
Java.Interop: xamarin/java.interop/d16-2@d64ada5
LibZipSharp: grendello/LibZipSharp/d16-2@caa0c74
LibZip: nih-at/libzip/rel-1-5-1@b95cf3f
ProGuard: xamarin/proguard/master@905836d
SQLite: xamarin/sqlite/3.27.1@8212a2d
Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-2@6f6c969

=== Microsoft Mobile OpenJDK ===

Java SDK: /Users/janettholst/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_1.8.0.9
1.8.0-9
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Android Device Manager ===

Version: 1.2.0.60
Hash: 686c817
Branch: remotes/origin/d16-2
Build date: 2019-08-07 15:49:58 UTC

=== Apple Developer Tools ===

Xcode 10.3 (14492.2)
Build 10G8

=== Xamarin.Mac ===

Version: 5.14.0.114 (Visual Studio Enterprise)
Hash: c6691164
Branch: d16-2
Build date: 2019-07-29 15:54:06-0400

=== Xamarin.iOS ===

Version: 12.14.0.114 (Visual Studio Enterprise)
Hash: c6691164
Branch: d16-2
Build date: 2019-07-29 15:54:05-0400

=== Xamarin Inspector ===

Version: 1.4.3
Hash: db27525
Branch: 1.4-release
Build date: Mon, 09 Jul 2018 21:20:18 GMT
Client compatibility: 1

=== Xamarin Designer ===

Version: 16.2.0.379
Hash: 3f0652957
Branch: remotes/origin/d16-2
Build date: 2019-08-01 17:32:50 UTC

=== Build Information ===

Release ID: 802040017
Git revision: 9b155edbf23e9fe8b477b3236a342164fabf5f6b
Build date: 2019-08-16 00:21:01+00
Build branch: release-8.2
Xamarin extensions: 9f2598b5f2371ba2903988c2cd87a9759d0255f2

=== Operating System ===

Mac OS X 10.14.6
Darwin 18.7.0 Darwin Kernel Version 18.7.0
    Thu Jun 20 18:42:21 PDT 2019
    root:xnu-4903.270.47~4/RELEASE_X86_64 x86_64

Build Logs

I'd rather not include the entire build log since it contains project details. I hope this is useful, this is the end of the file:

_CopyFilesMarkedCopyLocal:
  ...
_CopyAppConfigFile:
  ...
_DetectSigningIdentity:
  ...
_CopyResourcesToBundle:
  ...
_DetectDebugNetworkConfiguration:
    DebugIPAddresses: 
_CompileAppManifest:
  Directory "bin/iPhone/Release/AulaNative.iOS.app.dSYM" doesn't exist. Skipping.
_ParseExtraMtouchArgs:
    NoSymbolStrip Output: False
    NoDSymUtil Output: false
_CompileToNative:
  /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/bin/mtouch @/Users/[user]/workspace/mobile-app/application/[projectname]/iOS/obj/iPhone/Release/response-file.rsp 

Example Project (If Possible)

Unfortunately not possible since I do not own this project.

[rolfbjarne]

However, if I run it with false, then it works fine.

Do you mean if you set /p:BuildIpa=false?

Does it work if you build only for ARM64?

<MtouchArch>ARM64</MtouchArch>

[JanettHolst290490]

Ups, it removed my xml tags. I meant that it works if I run it with

<MtouchUseLlvm>false</MtouchUseLlvm>

I updated the description.

Let me try without ARMv7s

[JanettHolst290490]

It seems to work if I set only ARM64.
I only need IPhone 5S and up, so I suppose I will just leave out ARM-v7s

[rolfbjarne]

Since it works with only ARM64, this is most likely a variation/duplicate of #6787, so I'm closing this.

[EvoPulseGaming]

What about 32 bit devices? I have an ipad mini I use for debugging.... The duplicate was also closed. why