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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>
    </build-info>


<item>
            <title>[SERVER-10576] Use --detect-odr-violation if linking with a supported linker</title>
                <link>https://jira.mongodb.org/browse/SERVER-10576</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;ODR = One definition rule. This would detect if there were two classes or functions with the same name in the same namespace even if they are never both included in the same translation unit.&lt;/p&gt;

&lt;p&gt;Currently this flag is only supported by gold although other linkers may have similar flags. Actual flag to be added to LINKFLAGS is:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;-Wl,--detect-odr-violations&quot;.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="86550">SERVER-10576</key>
            <summary>Use --detect-odr-violation if linking with a supported linker</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</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="andrew.morrow@mongodb.com">Andrew Morrow</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                            <label>build-planning</label>
                    </labels>
                <created>Mon, 19 Aug 2013 19:43:55 +0000</created>
                <updated>Wed, 5 Apr 2017 11:42:37 +0000</updated>
                            <resolved>Tue, 29 Nov 2016 22:33:42 +0000</resolved>
                                                    <fixVersion>3.5.1</fixVersion>
                                    <component>Build</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1445311" author="xgen-internal-githook" created="Tue, 29 Nov 2016 22:30:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;acmorrow&apos;, u&apos;name&apos;: u&apos;Andrew Morrow&apos;, u&apos;email&apos;: u&apos;acm@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10576&quot; title=&quot;Use --detect-odr-violation if linking with a supported linker&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10576&quot;&gt;&lt;del&gt;SERVER-10576&lt;/del&gt;&lt;/a&gt; Use gold ODR violation detection if available&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/075b474c44f5ca9e266b70da201242270d73ba5e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/075b474c44f5ca9e266b70da201242270d73ba5e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1229070" author="acm" created="Thu, 7 Apr 2016 13:55:59 +0000"  >&lt;p&gt;I just tried building with &amp;#45;Wl,&amp;#45;&amp;#45;detect&amp;#45;odr&amp;#45;violation, and gold crashes. This is on Ubuntu 15.10, so this is pretty recent. Perhaps this feature isn&apos;t quite ready.&lt;/p&gt;</comment>
                            <comment id="1000883" author="redbeard0531" created="Mon, 10 Aug 2015 17:03:06 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=acm&quot; class=&quot;user-hover&quot; rel=&quot;acm&quot;&gt;acm&lt;/a&gt;, yes, since I think we should have it on by default. At the very least, one of the evergreen builders should be run with this flag so we fail the build on ODR violations.&lt;/p&gt;

&lt;p&gt;FYI, I tried adding that to my scons alias, but it is currently failing apparently due to forward declaring StatusWith. I can&apos;t tell if this is a false positive or not, but since it stops once it finds the first duplicate, I can&apos;t tell how many other errors it may be masking:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;Linking build/cached/mongo/mongod&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;/bin/ld.gold: warning: while linking build/cached/mongo/mongod: symbol &apos;mongo::StatusWith&amp;lt;mongo::VersionType&amp;gt;::~StatusWith()&apos; defined in multiple places (possible ODR violation):&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  src/mongo/s/catalog/catalog_manager.h:61 from build/cached/mongo/s/catalog/replset/catalog_manager_replica_set.o&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  src/mongo/s/catalog/type_collection.h:43 from build/cached/mongo/s/catalog/legacy/config_upgrade.o&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
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&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="1000716" author="acm" created="Mon, 10 Aug 2015 14:45:21 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=redbeard0531&quot; class=&quot;user-hover&quot; rel=&quot;redbeard0531&quot;&gt;redbeard0531&lt;/a&gt; - Do you think this is still useful, now that you can say:&lt;/p&gt;

&lt;p&gt;LINKFLAGS=&quot;&amp;#45;fuse-ld=gold &amp;#45;Wl,--detect-odr-violations&quot;&lt;/p&gt;

&lt;p&gt;in your ~/.scons/site_scons/mongo_custom_variables.py file?&lt;/p&gt;</comment>
                            <comment id="451001" author="acm" created="Mon, 4 Nov 2013 17:43:54 +0000"  >&lt;p&gt;We don&apos;t yet have an analogue for AddToCXXFlagsIfSupported for linker flags, but that is how this should be done&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Create a test body that is an empty mainline&lt;/li&gt;
	&lt;li&gt;Use TryLink to build and link the test body with &quot;-Wl,&amp;lt;flag&amp;gt;&quot;.&lt;/li&gt;
	&lt;li&gt;If the TryLink succeeds, add flag to LINKFLAGS.&lt;/li&gt;
&lt;/ul&gt;
</comment>
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