Failing to compile Thread example after updating OpenThread library

RE: Failing to compile Thread example after updating OpenThread library

Rufy — Fri, 19 Oct 2018 10:23:27 GMT

Hello Robert

I use windows gcc, too, and encounter build fail today.

My environment :

OS: windows 7
nordic sdk version: nRF5_SDK_for_Thread_and_Zigbee_2.0.0_29775ac.zip
openthread git version: 71d4ad3e777672a441e238344290df302ad86bb7

I follow Nordic online document (https://goo.gl/nH3bYu) to setup environment.

After updating the latest openthread project from github, the ble_thread_dyn_template example can't build successfully.

My error log:

Linking target: _build/nrf52840_xxaa.out
../../../../../../../external/openthread/lib/gcc/libopenthread-ftd.a(instance.cpp.o): In function `ot::Instance::Instanc
e()':
E:\Proj\nordic\_threadwc\trunk\external\openthread\project\lib\openthread\ftd\armgcc/../../../../openthread/src/core/com
mon/instance.cpp:90: undefined reference to `ot::LinkRaw::LinkRaw(ot::Instance&)'
../../../../../../../external/openthread/lib/gcc/libopenthread-ftd.a(mac.cpp.o): In function `otPlatRadioEnergyScanDone'
:
E:\Proj\nordic\_threadwc\trunk\external\openthread\project\lib\openthread\ftd\armgcc/../../../../openthread/src/core/mac
/mac.cpp:402: undefined reference to `ot::LinkRaw::InvokeEnergyScanDone(signed char)'
../../../../../../../external/openthread/lib/gcc/libopenthread-ftd.a(mac.cpp.o): In function `otPlatRadioReceiveDone':
E:\Proj\nordic\_threadwc\trunk\external\openthread\project\lib\openthread\ftd\armgcc/../../../../openthread/src/core/mac
/mac.cpp:1859: undefined reference to `ot::LinkRaw::InvokeReceiveDone(otRadioFrame*, otError)'
../../../../../../../external/openthread/lib/gcc/libopenthread-ftd.a(mac.cpp.o): In function `otPlatRadioTxDone':
E:\Proj\nordic\_threadwc\trunk\external\openthread\project\lib\openthread\ftd\armgcc/../../../../openthread/src/core/mac
/mac.cpp:1306: undefined reference to `ot::LinkRaw::InvokeTransmitDone(otRadioFrame*, otRadioFrame*, otError)'
collect2.exe: error: ld returned 1 exit status
make: *** [_build/nrf52840_xxaa.out] Error 1

It doesn't work even I modify makefile libopenthread-platform-utils.a into libopenthread-nrf52840-sdk.a.

RE: Failing to compile Thread example after updating OpenThread library

Robert Lubos — Tue, 20 Mar 2018 15:11:50 GMT

Hello,

Thank you for reporting this issue.

I have identified two problems with the linker after updating OpenThread with libraries build with GCC on Windows.

First of all, libopenthread-platform-utils.a is not included in makefiles for our examples. The reason for that is that OpenThread build system silently merges libopenthread-platform-utils.a into libopenthread-nrf82840-sdk.a. Our GCC projects for Windows don't do that, therefore the problem with missing references to otPlatSettingsSet etc. We are going to fix that in next release.

To fix that problem, modify the Makefile you are using to build your project, and include the missing library:

# Libraries common to all targets
LIB_FILES += \
  $(SDK_ROOT)/external/openthread/lib/gcc/libopenthread-cli-ftd.a \
  $(SDK_ROOT)/external/openthread/lib/gcc/libopenthread-ftd.a \
  $(SDK_ROOT)/external/openthread/lib/gcc/libopenthread-platform-utils.a \
  $(SDK_ROOT)/external/openthread/lib/gcc/libopenthread-nrf52840-sdk.a \
  $(SDK_ROOT)/external/openthread/lib/gcc/libopenthread-diag.a \
  $(SDK_ROOT)/external/openthread/lib/gcc/libmbedcrypto-cc310.a \
  $(SDK_ROOT)/external/nrf_cc310/lib/libcc310_gcc_0.9.0.a \

Kepp the order of the libraries as in the snippet above, otherwise you may still encounter issues with missing symbols during executable linking (unfortunately linking order makes difference to ld).

The second issue I've identified is that for some reason, when we use libraries build on Windows, they are missing some C++ runtime sybmbols. To fix that, you need to explicitly tell the linker to use C++ stdlib. To do that, again, modify the project Makefile and replace:

LIB_FILES += -lc -lnosys -lm

with the following:

LIB_FILES += -lc -lnosys -lm -lstdc++

Applying both of the proposed solutions should fix your linking errors.

Best Regards,
Robert

RE: Failing to compile Thread example after updating OpenThread library

Susheel Nuguru — Thu, 15 Mar 2018 12:39:22 GMT

yes, I did .. that is why I contacted the team :)

RE: Failing to compile Thread example after updating OpenThread library

Carry Irving — Tue, 13 Mar 2018 09:52:01 GMT

Thank you~

By the way, have you reproduced this error?

RE: Failing to compile Thread example after updating OpenThread library

Susheel Nuguru — Tue, 13 Mar 2018 09:23:31 GMT

contacted the thread team for this. Will come back to you soon when i get response from them.

RE: Failing to compile Thread example after updating OpenThread library

Carry Irving — Fri, 09 Mar 2018 05:50:57 GMT

Thanks for your reply.

devzone.nordicsemi.com/.../how-to-reproduce-the-error.txt

RE: Failing to compile Thread example after updating OpenThread library

Susheel Nuguru — Thu, 08 Mar 2018 08:06:58 GMT

can you help us reproduce this error?