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When I'm trying to build an Ad-Hoc version of my app, this error occurs :
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/iOS/Xamarin.iOS.Common.targets(747,3): warning MSB6002: The command-line for the "MTouch" task is too long. Command-lines longer than 32000 characters are likely to fail. Try reducing the length of the command-line by breaking down the call to "MTouch" into multiple calls with fewer parameters per call.
Visual Studio Community 2017 for Mac
Version 7.0 (build 3146)
Installation UUID: d614f455-2845-46f7-ab92-84e2ec5972e5
Mono 126.96.36.199 (2017-02/9667aa6) (64-bit)
GTK+ 2.24.23 (Raleigh theme)
Package version: 500000100
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/5.0.0/lib/mono/msbuild/15.0/bin/Sdks
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler
Version: 188.8.131.52 (Visual Studio Community)
Android SDK: /Users/etlinfo/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
6.0 (API level 23)
SDK Tools Version: 25.1.2
SDK Platform Tools Version: 24.0.0
SDK Build Tools Version: 23.0.2
Java SDK: /usr
java version "1.7.0_71"
Java(TM) SE Runtime Environment (build 1.7.0_71-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)
Android Designer EPL code available here:
Apple Developer Tools
Xcode 8.2.1 (11766.1)
Version: 184.108.40.206 (Visual Studio Community)
Build date: Fri, 21 Apr 2017 17:57:12 GMT
Version: 10.10.0.33 (Visual Studio Community)
Build date: 2017-05-05 18:11:38-0400
Release ID: 700003146
Git revision: 7553fda2e327d15807298d444007896e5b975dba
Build date: 2017-05-09 12:12:36-04
Xamarin addins: c3d580752be79fc902422f1d55d1cdc2d8b98799
Build lane: monodevelop-lion-d15-2
Mac OS X 10.11.6
Darwin 15.6.0 Darwin Kernel Version 15.6.0
Mon Jan 9 23:07:29 PST 2017
Created attachment 22205 [details]
I can confirm this bug from the logs, seems legit.
I believe the msbuild tasks could be updated to break down the command as suggested when it becomes too long (cc @rolf in case he sees something else):
"warning MSB6002: The command-line for the "MTouch" task is too long. Command-lines longer than 32000 characters are likely to fail. Try reducing the length of the command-line by breaking down the call to "MTouch" into multiple calls with fewer parameters per call."
@Frank, the warning is not related to the following mtouch 2001 error. The latter is a XF/xamlc issue -> https://bugzilla.xamarin.com/show_bug.cgi?id=56296
It's also a generic warning (from msbuild). The mtouch tool cannot be called multiple times to achieve the same result.
The command line limit on macOS is ~250k ("getconf ARG_MAX" => 262144 bytes), so this warning can safely be ignored for now.
The fix is to support response-files in mtouch:
echo "-r:abc.dll" > foo.rsp
and then have the msbuild tasks create that response file and pass it to mtouch instead of listing everything on the command line.
+1 a response file would be a great addition (and not just for the limit).
But it's content needs to be included part of the bug logs or we will lose important information to debug customers issues.
+1 for this, I'm getting it on my build system too
+1 for response files, I'm seeing this warning on the VSTS build agent. Currently my command line is about 47k
Step 1, support for response files, is in progress: https://github.com/xamarin/xamarin-macios/pull/2808
Step 1, support for response files, is now complete: https://github.com/xamarin/xamarin-macios/commit/e8d16c925bb74636366b00b5c6603514c94af763
Step 2, use a response file for references passed to mtouch is in progress:
Merged in https://github.com/xamarin/xamarin-macios/commit/97ef51bf8b3a0d3b5e16f62f9cfd579821db48ed