<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">This is currently a rough area in our build system, but there are two CMake options you probably need to set.</div><div class=""><br class=""></div><div class="">(1) -DLLVM_BUILD_EXTERNAL_COMPILER_RT=On —> This option causes the build to use the just-built clang when building compiler-rt</div><div class="">(2) -DCOMPILER_RT_DEFAULT_TARGET_ARCH=??? —> This is where you specify which architecture you want to build the compiler-rt archives and libraries for</div><div class=""><br class=""></div><div class="">Hopefully in the near future we’ll have a better story for building this functionality.</div><div class=""><br class=""></div><div class="">Hope this helps,</div><div class="">-Chris</div><div class=""><br class=""></div><br class=""><div><blockquote type="cite" class=""><div class="">On May 3, 2016, at 12:09 AM, 李阳 via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi WangLei,<div class=""><br class=""></div><div class="">Do you mean that the version 3.9 is LLVM project 3.9 and 3.5 is CMake 3.5?</div><div class=""><br class=""></div><div class="">In the guide[GetStarted.rst], the tutorial says before running CMake command, you must checkout all the source code. CMake does not pickup newly added source directories in incremental builds.</div><div class=""><br class=""></div><div class="">Have you cross-compiled the LLVM/Clang for ARM, or other successfully?</div><div class=""><br class=""></div><div class="">Cheers,</div><div class="">Liyang </div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">2016-05-03 14:42 GMT+08:00 王磊 via llvm-dev <span dir="ltr" class=""><<a href="mailto:llvm-dev@lists.llvm.org" target="_blank" class="">llvm-dev@lists.llvm.org</a>></span>:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br class="">Hi.<div class="">I'm trying to use Clang/LLVM as a cross-compiling toolchain. In previous version of LLVM with the old configure/Makefile building system, I'm able to build Clang/LLVM for target architecture with the host GCC firstly and then use the generated cross compiler to compile the compiler-rt project, and, consequently, I can get a cross compiler as well as the compiler-rt library. However, when I move to version 3.9 which abandoned configure/Makefile and uses CMake now, it always compile the compiler-rt simultaneously with the host GCC. The same problem is also existing in 3.5 CMake building system. It seems that in the CMake building system compiler-rt is not dependent on the generated toolchain. I also tried to compile the compiler-rt after Clang/LLVM has been built, and there is another problem that the generated Clang/LLVM cannot pass the CMake checking without compiler-rt, which is obvious... So is there any way that I can solve this problem. Thank you.</div><div class=""><br class=""></div><div class="">Lei Wang</div><div class=""><br class=""><br class=""><span class=""></span><div class=""><div class=""><span class=""></span><a title="发音" class=""></a><u class=""></u><u class=""></u><div class=""><a title="加入单词表" class=""></a><a title="移出单词表" class=""></a><a href="x-msg://106/#m_-2483977491504695984_" title="查看单词详细释义" class=""></a><a title="关闭查询窗" class=""></a></div><br style="clear:both" class=""></div><div class=""></div></div></div><br class=""><br class=""><br class=""><br class="">_______________________________________________<br class="">
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