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<a href="https://gitlab.rtems.org/joel">Joel Sherrill</a> created an issue: <a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5334">#5334</a>
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<a href="#summary" aria-hidden="true" class="anchor" id="user-content-summary" style="margin-top: 0; margin-left: -20px; text-decoration: none; outline: none; position: absolute; width: 20px;"></a>Summary</h2>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">This issue is to answer the question of what attribution/copyright, license, and SPDX to add to files that were cherry picked from NetBSD. The following is a sample:</p>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/libdl/rtl-mdreloc-arm.c</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/libdl/rtl-mdreloc-i386.c</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/libdl/rtl-mdreloc-m68k.c</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/libdl/rtl-unwind-arm.c</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/libdl/rtl-unwind-arm.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/arm/include/machine/elf_machdep.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/i386/include/machine/elf_machdep.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/m68k/include/machine/elf_machdep.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/mips/include/machine/elf_machdep.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/moxie/include/machine/elf_machdep.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/nios2/include/machine/elf_machdep.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/powerpc/include/machine/elf_machdep.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/sparc/include/machine/elf_machdep.h</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">./cpukit/score/cpu/x86_64/include/machine/elf_machdep.h</li>
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">The elf_machdep.h may be direct copies. This will have to be confirmed. But the recommendation at the end is the same.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">The libdl/rtl files are more challenging. This is typical of what is at the top of one of these files:</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style='display: block; font-size: 14px; color: #3a383f; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 1rem; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; border-radius: .25rem; background-color: inherit; white-space: pre; margin-top: 0; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">/*</span>
<span id="LC2" class="line" lang="plaintext"> * Taken from NetBSD and stripped of the relocations not needed on RTEMS.</span>
<span id="LC3" class="line" lang="plaintext"> */</span>
<span id="LC4" class="line" lang="plaintext"></span>
<span id="LC5" class="line" lang="plaintext">/* $NetBSD: mdreloc.c,v 1.26 2010/01/14 11:58:32 skrll Exp $ */</span></code></pre>
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial"><a href="https://gitlab.rtems.org/chris" data-reference-type="user" data-user="3" data-container="body" data-placement="top" class="gfm gfm-project_member js-user-link" title="Chris Johns" style="color: #284779; background-color: #cbe2f9; border-radius: .25rem; margin-top: 0; padding: 0 2px;">@chris</a> and I chatted a bit about this and he asked for a proposal Unfortunately, I think we do need to go back to the NetBSD source for each file to ensure we pick the right BSD license tag. For the above file which is rtl-reloc-arm.c in RTEMS libdl, it is libexec/ld.elf_so/arch/m68k/mdreloc.c in NetBSD. The current <a href="https://github.com/NetBSD/src/blob/54994cf764b063801ddcb0afb35b358a8ad403ef/libexec/ld.elf_so/arch/m68k/mdreloc.c#L2" rel="nofollow noreferrer noopener" target="_blank">version</a> has had multiple updates but it is currently Four Paragraph BSD and has the following attribution:</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style='display: block; font-size: 14px; color: #3a383f; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 1rem; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; border-radius: .25rem; background-color: inherit; white-space: pre; margin-top: 0; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;"> * Copyright 1996 John D. Polstra.</span>
<span id="LC2" class="line" lang="plaintext"> * Copyright 1996 Matt Thomas <matt@3am-software.com></span>
<span id="LC3" class="line" lang="plaintext"> * All rights reserved.</span></code></pre>
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">My suggestion requires git archaeology on the NetBSD source but it seems the right thing to do.</p>
<ol dir="auto" style="text-align: initial; margin: 0 0 1rem; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Find the current NetBSD source for each file.</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Copy the license/copyright block into the RTEMS version.</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Add SPDX for the license used as line 1 of the RTEMS file</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Add a Doxygen file block which includes the CVS Id and the comment about RTEMS changes. If there are no RTEMS changes, we probably should add a note to that effect.</li>
</ol>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Rinse and repeat for each file from NetBSD.</p>
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<a href="#pre-set-options" aria-hidden="true" class="anchor" id="user-content-pre-set-options" style="margin-top: 0; margin-left: -20px; text-decoration: none; outline: none; position: absolute; width: 20px;"></a>Pre-set options</h3>
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