Fix undefined reference to `__log_current_const_data_get' when using LOG_MODULE_DECLARE

[nordic-krch]

Fixing compilation failure when LOG_MODULE_DECLARE() is used. Added test to cover usage of that macro.

One thing to note. With current scheme (LOG_MODULE_DECLARE/LOG_MODULE_REGISTER taking module name) it is forbidden to use LOG_MODULE_DECLARE() in headers thus logging in static inline function in header is impossible. That is because both macros creates static inline function with the same name: __log_current_dynamic_data_get().

Fixes #10026

[nordic-krch]

fyi: @mbolivar @galak

[carlescufi]

Looks fine to me

[mbolivar]

Seems fine, tested locally, confirmed test_module.c compiles

[carlescufi]

@nordic-krch seems some tests are running out of RAM with the patch, can you take a look and blacklist/whitelist/modify as required?

[codecov-io]

Codecov Report

Merging #10045 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #10045   +/-   ##
=======================================
  Coverage   52.96%   52.96%           
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  Files         214      214           
  Lines       26156    26156           
  Branches     5636     5636           
=======================================
  Hits        13853    13853           
  Misses      10030    10030           
  Partials     2273     2273

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[nordic-krch]

@carlescufi its not ram size issue, it looks more like a compiler issue (https://app.shippable.com/github/zephyrproject-rtos/zephyr/runs/22615/5/console):

Unable to reach log_dynamic_test (at 0x004001f0) from the global pointer (at 0x00408628) because the offset (-33848) is out of the allowed range, -32678 to 32767.

There is plenty of ram but it seems like offset is limited to 32k. I've added altera_max10 and qemu_nios2 to platform_exlude list. Unless somebody knows how to fix it.

[nashif]

@nordic-krch

@carlescufi its not ram size issue, it looks more like a compiler issue

Can you open a bug about this so we do not lose track of it?