Troubleshooting linker error when compiling AI-deck wifi-img-streamer example with JPEG_ENCODING using the gap_sdk

[gelanchez]

Hi,

When trying to compile the wifi-img-streamer example with the JPEG_ENCODING enabled and the gap_sdk locally installed, I'm getting the following linker error:

/home/jose/projects/aideck-gap8-examples/examples/other/wifi-img-streamer/BUILD/GAP8_V2/GCC_RISCV_FREERTOS//home/jose/gap_sdk/libs/gap_lib/jpeg/cluster.o: In function `pop_ready_block':
/home/jose/gap_sdk/libs/gap_lib/jpeg/cluster.c:138: undefined reference to `hal_cl_eu_event_mask_wait_clear'
/home/jose/gap_sdk/libs/gap_lib/jpeg/cluster.c:138: undefined reference to `hal_cl_eu_event_mask_wait_clear'
collect2: error: ld returned 1 exit status
make: *** [/home/jose/gap_sdk/rtos/freeRTOS/vendors/gwt/rules/freeRTOS_rules.mk:419: /home/jose/projects/aideck-gap8-examples/examples/other/wifi-img-streamer/BUILD/GAP8_V2/GCC_RISCV_FREERTOS/wifi-img-streamer] Error 1

However the compilation works well with the RAW_ENCODING and the gap_sdk, and also with both encoding options if I use the docker image. Do you have any ideas why this happens? Are there any environment variables used in the docker image I'm missing? Any additional flags I need to add? Did I miss anything when I compiled the sdk?

Many thanks!

[gemenerik]

What version of the gap_sdk did you install? Or are you on master?
Do you source the aideck config?
Did you build all parts of the sdk?

The gap_sdk in the docker has some changes, most of them related to the offset for our bootloader. Other changes (hyperram and hyperflash includes and defines) also seem unrelated to the error you are getting, but you could give it a shot. You can git diff inside the /gap_sdk folder in the docker to see all changes.

[gelanchez]

Many thanks, @gemenerik,

I'm on the gap_sdk master, so latest version, I did source the aideck (configs/ai_deck.sh) and I think I've built all parts of the SDK by successfully running a make clean sdk there.

A git diff in the gap_sdk folder of the docker image only mentions three changes changes in flash_partition.c and a small one on a .PHONY in freeRTOS_rules.mk. I don't think these are related to the linker error (not sure if you meant those). A git diff in my local gap_sdk only shows a couple I made to make it work with the JTAG cable I'm using.

[knmcguire]

Alright, Rik should be back monday again so I'll let him know about this.

[gemenerik]

Could you pulled the latest version of the docker image and try again?

I have done it from fresh install today and have the same issue :(

I just verified that the streamer demo compiles and runs. Can you confirm you are on the latest docker image? Since this example does not require the autotiler you can run from bitcraze/aideck:latest instead of your aideck-with-autotiler (make sure you update this container based on your latest pulled bitcraze/aideck if you plan to use autotiler later).

docker run --rm -v ${PWD}:/module bitcraze/aideck:latest tools/build/make-example examples/other/wifi-img-streamer image

If instead you still want to use your sdk from source: It may be a bit confusing, the gap_sdk repo has tags but no "GitHub releases" for the v4.22.0 release. Try pulling that tag or even the latest master instead and let me know if the streamer demo compiles.

I recommended deleting the BUILD folder because make clean doesn't actually clean the entire build. I have had problems before with upgrading my sdk.

[gelanchez]

Hi, @gemenerik,

Thanks. The gap_sdk I'm using must be the latest version, as I got it with a git clone from the repository. That one doesn't work.

I'll try the latest docker image, but since the one I have now compiles, before updating to one that doesn't, can you confirm the example works on your side with the JPEG_ENCODING enabled, as that doesn't come by default and it's the bit giving problems? You might have tried without that, which works fine.

[gemenerik]

Sorry, you are right, with JPEG encoding enabled I get the same error. I fixed it in docker image bitcraze/aideck:4.22.0.1 and opened a pr on the gap_sdk repository.

You can easily switch between versions of the docker image (bitcraze/aideck:tag with tags found here) and between docker and your local installed sdk so no need to worry about trying things.

[gelanchez]

Thanks a lot, @gemenerik! Not sure how long it will take the PR to be approved, but now we have a solution. I'll set the discussion as resolved.