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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-27956] Build successfully under G++ 6.2</title>
                <link>https://jira.mongodb.org/browse/SERVER-27956</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Gcc 6 has substantially better error messages than Gcc 5, and lots of other improvements.  The only impediment is that builds fail warning about dicey memory management code.&lt;/p&gt;</description>
                <environment></environment>
        <key id="352820">SERVER-27956</key>
            <summary>Build successfully under G++ 6.2</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="nathan.myers">Nathan Myers</reporter>
                        <labels>
                    </labels>
                <created>Thu, 9 Feb 2017 02:38:36 +0000</created>
                <updated>Wed, 5 Apr 2017 11:44:13 +0000</updated>
                            <resolved>Tue, 28 Feb 2017 17:24:08 +0000</resolved>
                                    <version>3.5.2</version>
                                    <fixVersion>3.5.4</fixVersion>
                                    <component>Build</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1511412" author="xgen-internal-githook" created="Tue, 28 Feb 2017 17:23:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27956&quot; title=&quot;Build successfully under G++ 6.2&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27956&quot;&gt;&lt;del&gt;SERVER-27956&lt;/del&gt;&lt;/a&gt; fix gcc6 compile warning&lt;/p&gt;

&lt;p&gt;This is a more minimal version of&lt;br/&gt;
&lt;a href=&quot;https://github.com/boostorg/function/commit/bde64bf9ebe7a05e7c56505ea33133bde0ccbad0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/boostorg/function/commit/bde64bf9ebe7a05e7c56505ea33133bde0ccbad0&lt;/a&gt;&lt;br/&gt;
and&lt;br/&gt;
&lt;a href=&quot;https://github.com/boostorg/function/commit/54988e8e91ac0272f9364ae1818f519621b18317&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/boostorg/function/commit/54988e8e91ac0272f9364ae1818f519621b18317&lt;/a&gt;&lt;br/&gt;
that will tide us over until we can upgrade to a newer version of boost.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/87835611622ec35171506f254bfb24a560c8b741&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/87835611622ec35171506f254bfb24a560c8b741&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1496165" author="nathan.myers" created="Thu, 9 Feb 2017 18:02:23 +0000"  >&lt;p&gt;Yes, fixing the cause of the warnings is the aim of this ticket.&lt;/p&gt;</comment>
                            <comment id="1496162" author="acm" created="Thu, 9 Feb 2017 18:00:36 +0000"  >&lt;p&gt;In that case, you can probably stop the escalation of warnings to errors by using the &lt;tt&gt;--disable-warnings-as-errors&lt;/tt&gt; flag to SCons. Of course, if the warnings are legit, we should fix the underlying issues.&lt;/p&gt;</comment>
                            <comment id="1496159" author="nathan.myers" created="Thu, 9 Feb 2017 17:56:45 +0000"  >&lt;p&gt;I will just note here that this ticket is not about moving to Gcc 6 as the default development or delivery platform, but just for the system to be able to build under that compiler.&lt;/p&gt;</comment>
                            <comment id="1495644" author="acm" created="Thu, 9 Feb 2017 03:47:11 +0000"  >&lt;p&gt;Most likely this will happen for 3.8.&lt;/p&gt;

&lt;p&gt;Our typical flow here is as follows:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;We upgrade the compiler in X.odd development release, retaining the same target language standard, that we have been using (e.g. C++11).&lt;/li&gt;
	&lt;li&gt;If the upgraded compiler supports a new language standard, we add a non-ship canary build targeting that standard to X.odd.&lt;/li&gt;
	&lt;li&gt;We then ship X.odd+1 (our stable release), with that compiler.&lt;/li&gt;
	&lt;li&gt;In X.odd+2 (our next development release), if we have a new target language standard, we make that the default/required.&lt;/li&gt;
	&lt;li&gt;If we are satisfied with the functionality of the compiler with the new language standard in X.odd+2, we backport the ability to use that language standard into X.odd+1, to facilitate backports.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Basically, any one rev of the toolchain is used for two stable releases. We just upgraded the compiler to GCC 5 in MongoDB 3.4 development. So, by the current roadmap, we should ship 3.6 with GCC 5 as well, and then upgrade to GCC whatever (probably 7), during development for MongoDB 3.8.&lt;/p&gt;

&lt;p&gt;The TL;DR is that we are in the middle of the lifecycle for the current toolchain build, and we are not likely to move to a newer toolchain for, most likely, about a year.&lt;/p&gt;</comment>
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            <issuekey id="350720">SERVER-27881</issuekey>
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