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<a href="https://gitlab.rtems.org/lsilistr">Lucian Silistru</a> created an issue: <a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5145">#5145</a>
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<a href="#summary" aria-hidden="true" class="anchor" id="user-content-summary" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Summary</h2>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">When trying to compile RTEMS samples with C++20 (cxxflags: -std=c++20), iostream fails to build with the following errors:
<a href="https://gitlab.rtems.org/-/project/26/uploads/8f6e8e770175652463d188bdeaa44903/iostream_build_log.txt" data-canonical-src="/uploads/8f6e8e770175652463d188bdeaa44903/iostream_build_log.txt" data-link="true" class="gfm" style="margin-top: 0;">iostream_build_log.txt</a></p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">This config uses gcc 13.3.0 for riscv but I have noticed it on gcc 12.1.0 for sparc also.</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: .3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #28272d; margin: 24px 0 16px;" align="initial">
<a href="#steps-to-reproduce" aria-hidden="true" class="anchor" id="user-content-steps-to-reproduce" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Steps to reproduce</h2>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">This can be reproduced with current HEADs of rtems/rsb:</li>
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<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial"><code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>https://gitlab.rtems.org/rtems/rtos/rtems c4625d8d86be1497c62ceca26a96fba2bc32c03a</code></p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial"><code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>https://gitlab.rtems.org/rtems/tools/rtems-source-builder d82e3f433ba1441dc97e9d3c78eb0eb93212ed16</code></p>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Build tools</li>
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<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial"><code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>../source-builder/sb-set-builder --prefix=/home/lsilistr/work/rtems-source-builder/build 6/rtems-riscv</code></p>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">then clone rtems, create this basic config.ini and build:</li>
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<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">`[riscv/rv64imafdc]</p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">RTEMS_SMP = True</p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">RTEMS_POSIX_API = True</p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">BSP_RESET_BOARD_AT_EXIT = 0
`</p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial"><code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>./waf configure --prefix=/home/lsilistr/work/rtems-source-builder/build/</code>
<code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>./waf</code></p>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">
<p style="color: #28272d; margin: 0 0 16px;">Modify testsuites/samples/iostream with the following patch:
<a href="https://gitlab.rtems.org/-/project/26/uploads/08bf6b8edca73e9129bd0fddd9fcb698/iostream.yml.patch" data-canonical-src="/uploads/08bf6b8edca73e9129bd0fddd9fcb698/iostream.yml.patch" data-link="true" class="gfm" style="margin-top: 0;">iostream.yml.patch</a></p>
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<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">
<p style="color: #28272d; margin: 0 0 16px;">Rebuild.</p>
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<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: .3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #28272d; margin: 24px 0 16px;" align="initial">
<a href="#expected-behaviour" aria-hidden="true" class="anchor" id="user-content-expected-behaviour" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Expected behaviour</h2>
<p dir="auto" style="color: #28272d; margin: 0;" align="initial">Sample compiles with no errors.</p>
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