禁用汇编程序警告“.section __TEXT，__textcoal_nt，coalesced，pure_instructions”

本文介绍了禁用汇编程序警告“.section __TEXT，__textcoal_nt，coalesced，pure_instructions”的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 当在OS X上使用MacPorts GCC并通过 -Wa，-q 引入Clang集成汇编程序时，汇编程序会为每个文件产生一串警告。下面显示了警告的一个示例（其中很多是堆栈溢出编辑器不允许我粘贴整个流）。 我发现 LLVM提交r250349，停止生成煤部分。这是代码负责，但它不清楚如何禁用警告。 + //如果目标不是powerpc并且Section是*煤*部分，则发出警告。 + Triple TT = getParser（）。getContext（）。getObjectFileInfo（） - > getTargetTriple（）; + Triple :: ArchType ArchTy = TT.getArch（）; + + if（ArchTy！= Triple :: ppc& ArchTy！= Triple :: ppc64）{ + StringRef NonCoalSection = StringSwitch< StringRef>（Section） + .Case（__ textcoal_nt，__text） + .Case（__ const_coal，__const） + .Case（__ datacoal_nt，__data） + .DEFAULT（段）; + + if（！Section.equals（NonCoalSection））{ + StringRef SectionVal（Loc.getPointer（））; + size_t B = SectionVal.find（'，'）+ 1，E = SectionVal.find（'，'，B）; + SMLoc BLoc = SMLoc :: getFromPointer（SectionVal.data（）+ B）; + SMLoc ELoc = SMLoc :: getFromPointer（SectionVal.data（）+ E）; + getParser（）。Warning，（Loc，section \+ Section +\is deprecated， + SMRange（BLoc，ELoc））; + getParser（）。注意（Loc，将节名更改为\+ NonCoalSection + +\，SMRange（BLoc，ELoc））; +} +} + 我无法重定向 2> / dev / null ，因为此时配置有点脆弱，并且会丢弃其他警告和错误。 如何禁用Clang汇编程序警告？ 当GCC编译器遇到 -Wa，-q ，它使用 / opt / local / bin / clang 作为汇编程序而不是 / opt / local / bin中/作为。这里是相关的版本。 $ b $ / opt / local / bin / g ++ - mp- 6 --version g ++ - mp-6（MacPorts gcc6 6.1.0_0）6.1.0 版权所有（C）2016自由软件基金会，Inc. $ / opt / local / bin / clang --version 叮当版本3.8.0（branches / release_38 262722）目标：x86_64-apple-darwin12.6.0 $ / opt / local / bin / as -version Apple Inc版本cctools-877.8，GNU汇编程序版本1.38 将 -Wno-deprecated 添加到 CXXFLAGS 不会抑制警告。我也尝试过 -fno-tree-coalesce-vars 没有喜悦（这可能会损害性能）。 以下 sed 在OS X上使用 sed 或 gsed ： $ b $ CXXFLAGS = - DNDEBUG -g2 -O2make CXX = / opt / local / bin / g ++ - mp-6 2>& 1 | \ gsed -e'/（__ TEXT | __DATA）/，+ 2d' / opt / local / bin / g ++ - mp-6 -DNDEBUG -g2 -O2 -fPIC -march = native - Wa，-q -pipe -c rijndael.cpp stdin> 3：11：warning：section__textcoal_ntis deprecated .section __TEXT，__ textcoal_nt，coalesced，pure_instructions ^ ~~~~~~~~~~~~~ ：3：11：note：将节名更改为__text .section __TEXT，__textcoal_nt，coalesced，pure_instructions ^ ~~~~~~~~~~~~ ... / opt / local / bin / g ++ - mp-6 -DNDEBUG -g2 -O2 -fPIC -march = native -Wa，-q -DMACPORTS_GCC_COMPILER = 1 -c cryptlib.cpp stdin>：3：11：warning：section__textcoal_nt已弃用 .section __TEXT，__textcoal_nt，合并，pure_instructions ^ ~~~~~~~~~~~~~ ：3：11：note：将节名更改为__text .section __TEXT， __textcoal_nt，凝聚， pure_instructions ^ ~~~~~~~~~~~~~ stdin>：2665：11：warning：section__textcoal_ntis deprecated .section __TEXT，__ textcoal_nt， coalesced，pure_instructions ^ ~~~~~~~~~~~~~ stdin>：2665：11：note：将节名更改为__text .section __TEXT ，__textcoal_nt，coalesced，pure_instructions ^ ~~~~~~~~~~~~~ stdin>：3925：11：warning：section__textcoal_ntis deprecated 。 section __TEXT，__ textcoal_nt，coalesced，pure_instructions ^ ~~~~~~~~~~~~ stdin>：3925：11：note：将section name改为__text .section __TEXT，__ textcoal_nt，coalesced，pure_instructions ^ ~~~~~~~~~~~~~ stdin>：3963：11：warning：section__textcoal_ntis deprecated .section __TEXT，__ textcoal_nt，coalesced，pure_instructions ^ ~~~~~~~~~~~~~ .section __TEXT，__ textcoal_nt，coalesced，pure_instructions ^ ~~~~~~~~~~~~~ [为每个源文件省略其中的数百] 以下是相关的GCC和LLVM错误报告： GCC Issue 71767 - 使用GCC与-Wa，-q和Clang集成的汇编程序时无尽的警告流 LLVM Issue 28427 - 使用GCC和-Wa，-q时会有无尽的警告和Clang集成汇编程序 解决方案目前，您无法禁用这些警告。您应该提交一份针对FSF GCC的错误报告，让他们更新他们的codegen以使其更加合规。 您可能还想用llvm.org提交错误报告给要求有一种方法来消除这些警告或限制发布的数量，以免洪水泛滥。 When using MacPorts GCC on OS X and enlisting the Clang Integrated Assembler via -Wa,-q, the assembler produces a stream of warnings for each file. A sampling of the warnings is shown below (so many of them, the Stack Overflow editor would not allow me to paste the entire stream).I found LLVM Commit r250349, Stop generating coal sections. Here's the code responsible, but its not clear to me how to disable the warning.+ // Issue a warning if the target is not powerpc and Section is a *coal* section.+ Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();+ Triple::ArchType ArchTy = TT.getArch();++ if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {+ StringRef NonCoalSection = StringSwitch<StringRef>(Section)+ .Case("__textcoal_nt", "__text")+ .Case("__const_coal", "__const")+ .Case("__datacoal_nt", "__data")+ .Default(Section);++ if (!Section.equals(NonCoalSection)) {+ StringRef SectionVal(Loc.getPointer());+ size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);+ SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);+ SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);+ getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",+ SMRange(BLoc, ELoc));+ getParser().Note(Loc, "change section name to \"" + NonCoalSection ++ "\"", SMRange(BLoc, ELoc));+ }+ }+I can't redirect 2 > /dev/null because the configuration is a bit fragile at the moment, and it discards other warnings and errors.How do I disable the Clang assembler warning on coal sections?When the GCC compiler encounters -Wa,-q, it uses /opt/local/bin/clang as the assembler rather than /opt/local/bin/as. Here are the relevant versions.$ /opt/local/bin/g++-mp-6 --versiong++-mp-6 (MacPorts gcc6 6.1.0_0) 6.1.0Copyright (C) 2016 Free Software Foundation, Inc.$ /opt/local/bin/clang --versionclang version 3.8.0 (branches/release_38 262722)Target: x86_64-apple-darwin12.6.0$ /opt/local/bin/as -versionApple Inc version cctools-877.8, GNU assembler version 1.38Adding -Wno-deprecated to CXXFLAGS does not suppress the warning. I also tried -fno-tree-coalesce-vars with no joy (which may hurt performance).And the following sed does not match on OS X using sed or gsed:$ CXXFLAGS="-DNDEBUG -g2 -O2" make CXX=/opt/local/bin/g++-mp-6 2>&1 | \ gsed -e '/(__TEXT|__DATA)/,+2d'/opt/local/bin/g++-mp-6 -DNDEBUG -g2 -O2 -fPIC -march=native -Wa,-q -pipe -c rijndael.cpp<stdin>:3:11: warning: section "__textcoal_nt" is deprecated .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~<stdin>:3:11: note: change section name to "__text" .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~.../opt/local/bin/g++-mp-6 -DNDEBUG -g2 -O2 -fPIC -march=native -Wa,-q -DMACPORTS_GCC_COMPILER=1 -c cryptlib.cpp<stdin>:3:11: warning: section "__textcoal_nt" is deprecated .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~<stdin>:3:11: note: change section name to "__text" .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~<stdin>:2665:11: warning: section "__textcoal_nt" is deprecated .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~<stdin>:2665:11: note: change section name to "__text" .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~<stdin>:3925:11: warning: section "__textcoal_nt" is deprecated .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~<stdin>:3925:11: note: change section name to "__text" .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~<stdin>:3963:11: warning: section "__textcoal_nt" is deprecated .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~<stdin>:3963:11: note: change section name to "__text" .section __TEXT,__textcoal_nt,coalesced,pure_instructions ^ ~~~~~~~~~~~~~[Hundred of these ommitted for each source file]Here are the relevant GCC and LLVM bug reports:GCC Issue 71767 - Endless stream of warnings when using GCC with -Wa,-q and Clang Integrated AssemblerLLVM Issue 28427 - Endless stream of warnings when using GCC with -Wa,-q and Clang Integrated Assembler 解决方案 At present, you cannot disable those warnings. You should probably file a bug report against FSF GCC to have them update their codegen to be more compliant.You might also want to file a bug report with llvm.org to request that there be a way to silence these warnings or limit the number that are issued so as to not deluge the user. 这篇关于禁用汇编程序警告“.section __TEXT，__textcoal_nt，coalesced，pure_instructions”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！