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Created December 10, 2025 11:30
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How can I make the 'en_US' locale by default?
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<b>This post is hidden</b>. It was <a href="/help/deleted-questions">deleted</a> <span dir="ltr" title="Nov 13 at 6:17"><span title='2025-11-13 06:17:03Z' class='relativetime'>27 days ago</span></span> by <a href="/users/7916438/tevemadar" dir="auto">tevemadar</a>, <a href="/users/5779732/amit-joshi" dir="auto">Amit Joshi</a>, <a href="/users/3074564/mofi" dir="auto">Mofi</a>.
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<p> This question does not appear to be about <a href="/help/on-topic">a specific programming problem, a software algorithm, or software tools primarily used by programmers</a>. You can edit the question so it&#39;s <a href="/help/on-topic">on-topic</a> or see if it can be answered on <a href="https://stackexchange.com/sites">another Stack Exchange site</a>, but be sure to read the on-topic page for a site before posting there.</p>
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<p class="ml24 pl2">Closed <span title='2025-09-03 21:37:04Z' class='relativetime'>3 months ago</span>.</p>
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<p>I use <a href="https://en.wikipedia.org/wiki/Buildroot" rel="nofollow noreferrer">Buildroot</a> to build Linux with <a href="https://en.wikipedia.org/wiki/BusyBox" rel="nofollow noreferrer">BusyBox</a> (without <a href="https://en.wikipedia.org/wiki/Systemd" rel="nofollow noreferrer">systemd</a>). How can I make the 'en_US' locale by default?</p>
<p>My Buildroot configuration is similar to <a href="https://gitlab.com/buildroot.org/buildroot/-/blob/master/configs/qemu_x86_defconfig?ref_type=heads" rel="nofollow noreferrer">qemu_x86_defconfig</a>, but with the extra</p>
<pre class="lang-none prettyprint-override"><code>BR2_ENABLE_LOCALE_WHITELIST=&quot;en_US&quot;
BR2_GENERATE_LOCALE=&quot;en_US&quot;
</code></pre>
<p>After I try to start my hello world <a href="https://en.wikipedia.org/wiki/Qt_%28software%29" rel="nofollow noreferrer">Qt</a> application, I get a noisy warning:</p>
<pre class="lang-none prettyprint-override"><code>Detected locale &quot;C&quot; with character encoding &quot;ANSI_X3.4-1968&quot;, which is not UTF-8.
Qt depends on a UTF-8 locale, but has failed to switch to one.
If this causes problems, reconfigure your locale. See the locale(1) manual
for more information.
</code></pre>
<p>Then I <a href="https://gitlab.com/buildroot.org/buildroot/-/issues/52" rel="nofollow noreferrer">build the locale</a> tool. Let's check by <a href="https://man7.org/linux/man-pages/man1/locale.1.html" rel="nofollow noreferrer">locale</a>:</p>
<pre class="lang-none prettyprint-override"><code># Locale
LANG=
LC_CTYPE=&quot;POSIX&quot;
LC_NUMERIC=&quot;POSIX&quot;
LC_TIME=&quot;POSIX&quot;
LC_COLLATE=&quot;POSIX&quot;
LC_MONETARY=&quot;POSIX&quot;
LC_MESSAGES=&quot;POSIX&quot;
LC_PAPER=&quot;POSIX&quot;
LC_NAME=&quot;POSIX&quot;
LC_ADDRESS=&quot;POSIX&quot;
LC_TELEPHONE=&quot;POSIX&quot;
LC_MEASUREMENT=&quot;POSIX&quot;
LC_IDENTIFICATION=&quot;POSIX&quot;
LC_ALL=
</code></pre>
<p>But if I do</p>
<pre class="lang-none prettyprint-override"><code>export LC_ALL=en_US.utf8 &amp;&amp; ./myQt_app
</code></pre>
<p>Then works without warning. And <code>locale</code> also can see <em>en_US.utf8</em>... How can I export automatically?</p>
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<b>This answer is hidden</b>. This answer was deleted <span dir="ltr" title="Nov 13 at 6:17"><span title='2025-11-13 06:17:03Z' class='relativetime'>27 days ago</span></span> along with its parent question.
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<p><a href="https://stackoverflow.com/questions/79164807/how-can-i-make-the-en-us-locale-by-default/79165438#79165438">Arnout's solution</a> works! I ask my profile to upload my script:</p>
<pre class="lang-none prettyprint-override"><code>cat &lt;&lt;EOF &gt; /etc/profile.d/export_locale.sh
export LC_ALL=en_US.utf8
EOF
</code></pre>
<p>Then I log out and log back in.</p>
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answered <span title='2024-11-08 05:35:52Z' class='relativetime'>Nov 8, 2024 at 5:35</span>
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<p>There isn’t any Unix standard for specifying a default locale.</p>
<p><code>systemd</code> uses <em>/etc/locale.conf</em> to configure the default locale. You can manipulate this file at runtime with <code>localectl</code>, or you can put it in the <a href="https://buildroot.org/downloads/manual/manual.html#rootfs-custom" rel="nofollow noreferrer">rootfs overlay</a>.</p>
<p>For non-<em>systemd</em> init systems, you have to cook up something yourself by setting <a href="https://www.man7.org/linux/man-pages/man7/locale.7.html" rel="nofollow noreferrer">the locale environment variables</a>. You can put it in <code>/etc/profile</code>, but that only works for programs that are started through a shell. If you start a program directly from <code>inittab</code>, there isn’t any way to pass in environment variables, so you need a wrapper script.</p>
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answered <span title='2024-11-07 07:46:29Z' class='relativetime'>Nov 7, 2024 at 7:46</span>
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