Problem debugging FX30 using shared library


Hi, I am trying to debug my application that is running on a FX30s. It builds and runs OK, but the debugger tries to attached with the following error messages…

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warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
Cannot access memory at address 0x0
warning: Could not load shared library symbols for 9 libraries, e.g. /bin/…/lib/
Use the “info sharedlibrary” command to see the complete listing.
Do you need “set solib-search-path” or “set sysroot”?

I am using DS 5.00 and LF 16.10.1.

The one shared library is cross compiled using arm-poky-linux-gnueabi-g++ not sure what the other 8 are…

How do I best get around this issue?




Hello Karl,

Please tell which procedure has been used on your side:

  • add “-d” option to mkapp
  • or rebuild Legato by passing STRIP_STAGING_STREE=0 to its make, add --cflags="-g" and --ldflags="-g" to mkapp, and pass “set solib-search-path” to GDB client?



Hi @flu, I have built it using Developer studio… the build log is as follows

15:27:51 **** Incremental Build of configuration Target_Legato_Debug for project DLC_Gateway_Legato ****
make -I /home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato all
cd …;mkapp -t wp85 -o Target_Legato_Debug -w Target_Legato_Debug -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces/atServices” -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces/secureStorage” -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces/positioning” -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces/wifi” -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces/airVantage” -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces” -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces/modemServices” -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces/supervisor” -i “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/interfaces/logDaemon” -i /home/legato/projects/DLC-Gateways_DS/DLC-Gateway-Base -i /home/legato/projects/DLC-Gateways_DS/XPlat-Shared -i /home/legato/projects/DLC-Gateways_DS/DL4Api-Base -i /home/legato/projects/DLC-Gateways_DS/DL4Api-Linux -s “.” -s “/home/legato/legato/packages/legato.framework.16.10.1.wp85-wp750x-201701111029/resources/legato/components” -C -g -X -g -L -g DLC_Gateway_Legato.adef
ninja: no work to do.
av-pack -b . -u DLC_Gateway_Legato.wp85.update -t LegatoApplication
Generating an airvantage package for a legato application.
adding: DLC_Gateway_Legato.wp85.update (deflated 0%)
adding: (deflated 69%)

15:27:51 Build Finished (took 430ms)



As per flu mentioned, please try to provide the -d option in mkapp command.

For your reference, Please check the below link for Debug using GDB.

Best Regards,
Bharath Kumar V