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    <title>MongoDB Jira</title>
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    <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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            <title>[SERVER-59614] ninja tool could fail to detect compiler changes</title>
                <link>https://jira.mongodb.org/browse/SERVER-59614</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56003&quot; title=&quot;ninja + icecream with changing compilers doesn&amp;#39;t regen run-icecc.sh&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56003&quot;&gt;&lt;del&gt;SERVER-56003&lt;/del&gt;&lt;/a&gt;, Mathias discussed the issue with using mtimes for checking if the compiler has changed. There are cases where the compiler could change, and the mtime still not be newer, which is what ninja checks for when rebuilding.&lt;/p&gt;

&lt;p&gt;Not just for compilers but any tool, or in ninja tool terms, providers, which are generally binaries not part of the source tree which are used to build nodes, for example, compilers.&lt;/p&gt;

&lt;p&gt;A solution to this would be to hash to providers and depend on a file containing the hash, only updating the file if the hash has changed. Then via ninja&apos;s restat we can decide for sure if things should be rebuilt not just from the mtime.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1860818">SERVER-59614</key>
            <summary>ninja tool could fail to detect compiler changes</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-devplatform">[DO NOT ASSIGN] Backlog - Server Development Platform Team (SDP)</assignee>
                                    <reporter username="daniel.moody@mongodb.com">Daniel Moody</reporter>
                        <labels>
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                <created>Thu, 26 Aug 2021 15:45:08 +0000</created>
                <updated>Fri, 14 Jul 2023 16:10:33 +0000</updated>
                            <resolved>Fri, 14 Jul 2023 16:10:33 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5567192" author="JIRAUSER1274045" created="Fri, 14 Jul 2023 16:10:33 +0000"  >&lt;p&gt;We plan to adopt Bazel in the coming months, which will address this issue (Bazel has sufficient dependency analysis for stuff like compiler-changed).&lt;/p&gt;</comment>
                            <comment id="4432662" author="JIRAUSER1257562" created="Thu, 24 Mar 2022 15:50:05 +0000"  >&lt;p&gt;We are pushing this back to the backlog. We will revisit this when we have more bandwidth to work on it.&#160;&lt;/p&gt;</comment>
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