strerror, strerror_r, gai_strerror, perror: Add full implementation

[agkaminski]

DONE: RTOS-569

Description

Fixes phoenix-rtos/phoenix-rtos-project#181

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

How Has This Been Tested?

• Already covered by automatic testing.
• New test added: (add PR link here).
• Tested by hand on: (ia32-generic-qemu).

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing linter checks and tests passed.
• My changes generate no new compilation warnings for any of the targets.

Special treatment

• This PR needs additional PRs to work (list the PRs, preferably in merge-order).
• I will merge this PR by myself when appropriate.

[nalajcie]

IMHO this should be implementation of strerror, perror might keep using strerror :)

[gerard5]

From my point of view, two implementations depending on the available platform resources (mem) should be considered. For example, after this change, each program that uses perror() e.g. psh increases by ca. 2KiB (imxrt, stm32). The earlier solution strerror() already implements a table for shorter error codes, and this is where the functionality should be extended, so that strerror() returns either a short description (for small targets, nommu) or a long error description for (zynq, ia32, 6ull), .. or depending on build config.

[agkaminski]

@gerard5 I've removed previous strerror string table which should somewhat reduce memory usage

[gerard5]

@gerard5 I've removed previous strerror string table which should somewhat reduce memory usage

It's still a bad bargain, now it costs 1.9KiB (compared to current master) for each program that use strerror(). It would be good to provide a choice at the project configuration stage whether a project developer want full error descriptions or abbreviated ones (targets with limited resources).