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Bug #1344

closed

lttng-modules v2.11 package fails to build with a custom Linux Kernel build using Buildroot

Added by Sreedhar Mahadevan 7 months ago. Updated 7 months ago.

Status:
Resolved
Priority:
Normal
Assignee:
-
Target version:
Start date:
01/06/2022
Due date:
% Done:

0%

Estimated time:

Description

Hello,

I am not able to successfully build the lttng-modules package with Buildroot v2021.05. I get the following syntax errors:

output/build/lttng-modules-2.11.0/./probes/../instrumentation/events/lttng-module/timer.h:313:41: error: invalid use of undefined type ‘const struct itimerval’
313 | ctf_integer(long, interval_usec, value->it_interval.tv_usec) | ^~

output/build/lttng-modules-2.11.0/./lib/../lib/ringbuffer/frontend.h:82:6: error: implicit declaration of function ‘smp_read_barrier_depends’ [-Werror=implicit-function-declaration]
82 | smp_read_barrier_depends(); (cpu) < nr_cpu_ids; });) | ^~~~~~~~~~~~~~~~~~~~~~

/output/build/lttng-modules-2.11.0/./lib/../wrapper/trace-clock.h:168:3: error: implicit declaration of function ‘read_barrier_depends’ [-Werror=implicit-function-declaration]
168 | read_barrier_depends(); /* load ltc before content */ | ^~~~~~~~~~~~~~~~~~

The errors look mostly syntactical and is replicated with a fresh clone of v2021.08, v2021.11, v2020.05, v2020.08 also. The lttng-tools and lttng-babeltrace packages build without issues but the moment lttng-modules is selected and built, it fails. Is this issue known already? Are there any solutions for it?

I am attaching two .config files here. The reason is that I suspected the external tool chain option to create the issue, because of which I tried using buildroot's own tool chain. Unfortunately I encountered the same error using both configurations.


Files

.config_buildroot_2files.zip (40.8 KB) .config_buildroot_2files.zip Sreedhar Mahadevan, 01/06/2022 12:43 AM
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