<div dir="ltr">This is just a guess as you haven't included the full invocation or output of the failing command, but perhaps you need <span style="font-family:monospace">-DGCC_INSTALL_PREFIX=<span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">/home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830</span></span></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 19, 2021 at 8:38 PM 刘可 via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div id="gmail-m_643134630198768771appVersion:飞书-4.8.1-editorVersion:0.9.6"></div><div><div style="line-height:1.68"><div style="font-family:arial,helvetica,sans-serif;color:rgb(31,35,41);line-height:1.68"><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">Hi, I'm from ByteDance.</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">I was confused when I built LLVM with gcc toolchain.</span></div><div dir="auto" style="margin:4px 0px"><br></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">===================================================================</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">Here is my first command:</span></div><div dir="auto" style="margin:4px 0px"><br></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">CXX=/home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/bin/g++ \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">CC=/home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/bin/gcc \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">cmake -G Ninja \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">-DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;lldb;openmp" \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">-DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx;libcxxabi;libunwind" \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">-DLLVM_TARGETS_TO_BUILD="X86;ARM;AArch64" \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">-DCMAKE_BUILD_TYPE=Release  \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">-DLLVM_BUILD_LLVM_DYLIB=ON \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">-DLLVM_LINK_LLVM_DYLIB=ON \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">-DCMAKE_CXX_FLAGS="-Wl,-rpath /home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/lib64 -Wl,-rpath /home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/sysroot/lib64 -Wl,-dynamic-linker /home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/sysroot/lib64/</span><span><span style="font-size:14px"><a href="http://ld-linux-x86-64.so" rel="noopener" style="text-decoration:none;color:rgb(51,112,255)" target="_blank">ld-linux-x86-64.so</a></span></span><span style="font-size:14px">.2 -I/home/liuke.gehry/toolchain/x86_64-x86_64-gcc-494/sysroot/usr/include" \</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">../llvm</span></div><div dir="auto" style="margin:4px 0px"><br></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">result:</span></div><div dir="auto" style="margin:4px 0px"><span style="font-size:14px">/usr/include/features.h:364:12: fatal error: 'sys/cdefs.h' file not found.</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">===================================================================</span></div><div dir="auto" style="margin:4px 0px"><br></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">===================================================================</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">I tried to solve it by ’-I‘. But it failed.</span></div><div dir="auto" style="margin:4px 0px"><br></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">Here is my second command:</span></div><div dir="auto" style="margin:4px 0px"><br></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">CXX=/home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/bin/g++ \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">CC=/home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/bin/gcc \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">cmake -G Ninja -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;lldb;openmp" \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">-DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx;libcxxabi;libunwind" \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">-DLLVM_TARGETS_TO_BUILD="X86;ARM;AArch64" \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">-DCMAKE_BUILD_TYPE=Release  \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">-DLLVM_BUILD_LLVM_DYLIB=ON \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">-DLLVM_LINK_LLVM_DYLIB=ON \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">-DCMAKE_CXX_FLAGS="-Wl,-rpath /home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/lib64 -Wl,-rpath /home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/sysroot/lib64 -Wl,-dynamic-linker /home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/sysroot/lib64/</span><span><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)"><a href="http://ld-linux-x86-64.so" rel="noopener" style="text-decoration:none;color:rgb(51,112,255)" target="_blank">ld-linux-x86-64.so</a></span></span><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">.2 -I/home/liuke.gehry/toolchain/x86_64-x86_64-gcc-494/sysroot/usr/include" \</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">../llvm</span></div><div dir="auto" style="margin:4px 0px"><br></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">result:</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">/usr/include/features.h:364:12: fatal error: 'sys/cdefs.h' file not found.</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">$ ls /home/liuke.gehry/toolchain/x86_64-x86_64-gcc-830/sysroot/usr/include/sys/cdefs.h</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">toolchain/x86_64-x86_64-gcc-830/sysroot/usr/include/sys/cdefs.h</span></div><div dir="auto" style="margin:4px 0px"><br></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">'sys/cdefs.h' exists in gcc toolchain, </span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">===================================================================</span></div><div dir="auto" style="margin:4px 0px"><span style="background-color:rgba(0,0,0,0);font-weight:400;font-size:14px;color:rgb(31,35,41)">Looking forward to your reply. Thanks!</span></div></div></div></div>
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