Greengrass IDT failing [Error: 126] Failed to find libc on your device

Question

I have an Linux (armv7l) device which I am running GGC service on and am running into an error when executing the IDT:  
  
Reason: Error: 126 DependenciesNotPresentError: The following dependencies do not exist:  Failed to find libc on your device.  
  
The running of this test also deletes the users and groups (ggc_user and ggc_group) upon failure.    
  
I am running the test as root user.  The Greengrass Dependency Checker reports that all of the required dependencies are met.    
Here is the config file:  
\[  
  {  
    "id": "TP",  
    "sku": "sku1234",  
    "features": \[  
      {  
        "name": "os",  
        "value": "linux"  
      },  
      {  
        "name": "arch",  
        "value": "armv7l"  
      }  
    ],  
    "kernelConfigLocation": "",  
    "greengrassLocation": "",  
    "devices": \[  
      {  
        "id": "TP_DEV_Group_core",  
        "connectivity": {  
          "protocol": "ssh",  
          "ip": "10.6.10.145",  
          "auth": {  
            "method": "password",  
            "credentials": {  
              "user": "root",  
              "password": ""  
            }  
          }  
        }  
      }  
    ]  
  }  
]  
  
========== Test Summary ==========  
Execution Time: 	31s  
Tests Completed: 	6  
Tests Passed: 		5  
Tests Failed: 		1  
Tests Skipped: 		0  
----------------------------------  
Test Groups:  
    ggcdependencies: 		FAILED  
    version: 			PASSED  
----------------------------------  
Failed Tests:  
    Group Name: ggcdependencies  
        Test Name: Test System Configs Dependencies system_configs_check  
            Reason: \[Error: 126] DependenciesNotPresentError: The following dependencies do not exist:  Failed to find libc on your device. Please refer to https://docs.aws.amazon.com/greengrass/latest/developerguide/gg-gs.html for more information regarding required dependencies for Greengrass.. Refer to the logs and troubleshooting section of IDT User Guide https://docs.aws.amazon.com/greengrass/latest/developerguide/device-tester-for-greengrass-ug.html for more information.  
----------------------------------  
Path to AWS IoT Device Tester Report: /Users/jessecox/Dropbox/Greengrass_Development/idt/devicetester_greengrass_mac/results/f35e71a2-1c78-11ea-9e9c-a860b6004763/awsiotdevicetester_report.xml  
Path to Test Execution Logs: /Users/jessecox/Dropbox/Greengrass_Development/idt/devicetester_greengrass_mac/results/f35e71a2-1c78-11ea-9e9c-a860b6004763/logs  
Path to Aggregated JUnit Report: /Users/jessecox/Dropbox/Greengrass_Development/idt/devicetester_greengrass_mac/results/f35e71a2-1c78-11ea-9e9c-a860b6004763/GGQ_Report.xml

Any advice on this would be appreciated.  
  
Edited by: JesseCoxPDX on Dec 11, 2019 4:57 PM

Accepted Answer

Hi,  
  
IDT looks for the libc file under the '/lib' directory. We run this command to confirm this: find /lib** -name 'libc.so**'  
Can you please run this command on your device and confirm that your libc file exists under this directory?  
  
Thanks

Answer

Thank you for this answer.  The device I am developing on has some creative linking going on and i was unable to access this library with the command you provided.  I created another symlink and it fixed the problem.  Thanks very much.

Greengrass IDT failing [Error: 126] Failed to find libc on your device

========== Test Summary ========== Execution Time: 31s Tests Completed: 6 Tests Passed: 5 Tests Failed: 1 Tests Skipped: 0

Test Groups: ggcdependencies: FAILED version: PASSED

Relevanter Inhalt

========== Test Summary ==========
Execution Time: 31s
Tests Completed: 6
Tests Passed: 5
Tests Failed: 1
Tests Skipped: 0

Test Groups:
ggcdependencies: FAILED
version: PASSED