Linking error wirth undefined reference to `strdup' in contiki build

[Stefan-Schmidt]

Trying to build the various examples for the 6lowpanclicker right now.

Initiated the manifest with master (also tried dev, same result).

Whenever I run a build for contiki which includes the lwm2m example I get this linking error.

make[1]: Entering directory '/home/stefan/Projects/ieee802154/Ci40/creatorkit/packages/button-sensor'
CC lwm2m-client-button-sensor.c
LD lwm2m-client-button-sensor.mikro-e
contiki-mikro-e.a(coap_abstractio): In function coap_RegisterUri': coap_abstraction_contiki.c:(.text.coap_RegisterUri+0x20): undefined reference tostrdup'
contiki-mikro-e.a(lwm2m_definitio): In function NewObjectType': lwm2m_definition.c:(.text.NewObjectType+0x6c): undefined reference tostrdup'
contiki-mikro-e.a(lwm2m_definitio): In function NewResourceType': lwm2m_definition.c:(.text.NewResourceType+0x6c): undefined reference tostrdup'
contiki-mikro-e.a(lwm2m_util.o): In function Lwm2mCore_SplitQuery': lwm2m_util.c:(.text.Lwm2mCore_SplitQuery+0x30): undefined reference tostrdup'
lwm2m_util.c:(.text.Lwm2mCore_SplitQuery+0x98): undefined reference to strdup' contiki-mikro-e.a(lwm2m_util.o):lwm2m_util.c:(.text.Lwm2mCore_SplitQuery+0xdc): more undefined references tostrdup' follow
collect2: error: ld returned 255 exit status
../../constrained-os/contiki/Makefile.include:280: recipe for target 'lwm2m-client-button-sensor.mikro-e' failed
make[1]: *** [lwm2m-client-button-sensor.mikro-e] Error 255
rm lwm2m-client-button-sensor.co

xc32-gcc version is v1.42 and installed into /opt/microchip/xc32/v1.42/

As compilation itself seems to work I would thing maybe the linking flags are not setup correctly? Or is there some piece of code missing providing strdup for th this arch on contiki?

[abhijit-mahajani-imgtec]

Can you please check with 1.34 compiler once? Meanwhile we will check with 1.42 and get back to you.
You can get pre-built hex files at https://github.com/CreatorKit/manifest/releases/tag/v0.9.5

[Stefan-Schmidt]

Indeed v1.34 works like it should. Thanks a lot! Maybe add it as a note to the docs?

[abhijit-mahajani-imgtec]

Thanks @Stefan-Schmidt , https://github.com/CreatorDev/contiki/tree/3.0-mikro-e/platform/mikro-e describes the need of 1.34 compiler, however we will update the documentation such that it becomes more obvious.

[Stefan-Schmidt]

Ah, thanks for pointing this out. I only looked at the generic Creatorkit docs and not into the contiki mikro-e folder.

Places that just mention to install the cx32 compiler from the microship website (without the version hint):
https://docs.creatordev.io/clicker/guides/working-with-contiki/
https://docs.creatordev.io/ci40/iotkit/iot-project-tools/#building-from-source-code

Maybe also mention the v1.34 download link explicitly as the microship website only mentions the newest version and I had to google for the file name to get a link for v1.34

Besides the doc improvements this issue can be closed. Feel free to do so whenever you want.