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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The landed patch <a href="https://reviews.llvm.org/D38481">https://reviews.llvm.org/D38481</a> introduced the usage of CPU_COUNT defined in glibc sched.h header.<o:p></o:p></p>
<p class="MsoNormal">I failed to find this symbol in sched.h of glibc version 2.5-24, so compilation just fails.<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:black">/home/dolphin/merge-from-upstream-area/ws/pristine/lib/Support/Threading.cpp: In function ‘unsigned int llvm::hardware_concurrency()’:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:black">/home/dolphin/merge-from-upstream-area/ws/pristine/lib/Support/Threading.cpp:80:26: error: ‘CPU_COUNT’ was not declared in this scope<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> return CPU_COUNT(&Set);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> ^<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It is buildable with newest version of glibc. <o:p></o:p></p>
<p class="MsoNormal">I tried to find a requirements for glibc version in LLVM documentation but failed.<o:p></o:p></p>
<p class="MsoNormal">So I wonder whether there is such requirement or not.<o:p></o:p></p>
<p class="MsoNormal">Could anyone point me to this documentation?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I'm trying to understand whether patch is wrong which relies on availability of library but does not check the symbol itself or this version of glibc is not supported.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you,<o:p></o:p></p>
<p class="MsoNormal">Serguei.<o:p></o:p></p>
<p class="MsoNormal"><span lang="RU"><o:p> </o:p></span></p>
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