<div dir="auto"><font color="#1f497d" face="calibri, sans-serif"><span style="font-size:14.6667px">I would try the following</span></font><br style="font-family:sans-serif"><div dir="auto" style="font-family:sans-serif"><span style="color:rgb(31,73,125);font-family:'calibri',sans-serif;font-size:14.6667px">--gcc-toolchain=/home/repo/</span><span style="color:rgb(31,73,125);font-family:'calibri',sans-serif;font-size:14.6667px">jdx/wr8-baytrail_64/buildbox/</span><span style="color:rgb(31,73,125);font-family:'calibri',sans-serif;font-size:14.6667px">usr/ </span></div></div><br><div class="gmail_quote"><div dir="ltr">On Wed, 18 Apr 2018, 20:54 Miller Henry via cfe-dev, <<a href="mailto:cfe-dev@lists.llvm.org">cfe-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple">
<div class="m_-2548396005697767601WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">No. I played with a few alternate paths, but that doesn’t seem to make a difference. Any other ideas?<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> [2/2] Linking C executable cmTC_68894<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> FAILED: cmTC_68894
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> : && /opt/jdx/tools//usr/bin/clang --sysroot=/home/repo/jdx/wr8-baytrail_64/buildbox -fno-omit-frame-pointer -gsplit-dwarf -v --gcc-toolchain=/home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib64/
--target=x86_64-wrs-linux --sysroot=/home/repo/jdx/wr8-baytrail_64/buildbox -rdynamic -O2 -L/home/repo/jdx/wr8-baytrail_64/buildbox/usr/local/lib -Wl,--gdb-index -lrt -lpthread -Wl,--disable-new-dtags CMakeFiles/cmTC_68894.dir/testCCompiler.c.o -o cmTC_68894
&& :<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> clang version 6.0.0 (tags/RELEASE_600/final)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> Target: x86_64-wrs-linux<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> Thread model: posix<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> InstalledDir: /opt/jdx/tools//usr/bin<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> "/opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld" --sysroot=/home/repo/jdx/wr8-baytrail_64/buildbox -export-dynamic
-z relro --hash-style=gnu --eh-frame-hdr -m elf_x86_64 -export-dynamic -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o cmTC_68894 /home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib/../lib64/crt1.o /home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib/../lib64/crti.o
crtbegin.o -L/home/repo/jdx/wr8-baytrail_64/buildbox/usr/local/lib -L/home/repo/jdx/wr8-baytrail_64/buildbox/lib/../lib64 -L/home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib/../lib64 -L/home/repo/jdx/wr8-baytrail_64/buildbox/lib -L/home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib
--gdb-index -lrt -lpthread --disable-new-dtags CMakeFiles/cmTC_68894.dir/testCCompiler.c.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed crtend.o /home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib/../lib64/crtn.o<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> /opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld: error: cannot open crtbegin.o: No such file or directory<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> /opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld: error: cannot open crtend.o: No such file or directory<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> /opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld: error: cannot find -lgcc<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> /opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld: error: cannot find -lgcc<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> ninja: build stopped: subcommand failed.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Manoj Gupta [mailto:<a href="mailto:manojgupta@google.com" target="_blank" rel="noreferrer">manojgupta@google.com</a>]
<br>
<b>Sent:</b> Wednesday, April 18, 2018 12:44 PM<br>
<b>To:</b> Miller Henry <MillerHenry@JohnDeere.com><br>
<b>Cc:</b> <a href="mailto:cfe-dev@lists.llvm.org" target="_blank" rel="noreferrer">cfe-dev@lists.llvm.org</a><br>
<b>Subject:</b> Re: [cfe-dev] cross compiling with 6.0.0 not finding gcc paths<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">Does it help to pass the following to the clang command line: --gcc-toolchain=<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#222222;background:white">/home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib64 ?</span><u></u><u></u></p>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal">On Wed, Apr 18, 2018 at 7:52 AM Miller Henry via cfe-dev <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank" rel="noreferrer">cfe-dev@lists.llvm.org</a>> wrote:<u></u><u></u></p>
</div>
<blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">I’m building for an embedded system, this is working fine with gcc 5.2.0, but I’ve become interested in clang. In 3.9.1 everything builds fine (once I fixed the real bugs – thank
you to everyone who wrote useful warnings). I’m interested in trying clang 6.0.0, and there things don’t build.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">The first error I get is is from cmake:<u></u><u></u></p>
<p class="MsoNormal"> [2/2] Linking C executable cmTC_03cd5<u></u><u></u></p>
<p class="MsoNormal">FAILED: cmTC_03cd5
<u></u><u></u></p>
<p class="MsoNormal"> : && /opt/jdx/tools//usr/local/share/icecc/bin//clang --sysroot=/home/user/repo/jdx/wr8-baytrail_64/buildbox -fno-omit-frame-pointer -gsplit-dwarf -fdiagnostics-color=always
--target=x86_64-wrs-linux --sysroot=/home/repo/jdx/wr8-baytrail_64/buildbox -rdynamic -O2 -L/home/repo/jdx/wr8-baytrail_64/buildbox/usr/local/lib -Wl,--gdb-index -lrt -lpthread -Wl,--disable-new-dtags CMakeFiles/cmTC_03cd5.dir/testCCompiler.c.o -o cmTC_03cd5
&& :<u></u><u></u></p>
<p class="MsoNormal">/opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld: error: cannot open crtbegin.o: No such file or directory<u></u><u></u></p>
<p class="MsoNormal">/opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld: error: cannot open crtend.o: No such file or directory<u></u><u></u></p>
<p class="MsoNormal"> /opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld: error: cannot find -lgcc<u></u><u></u></p>
<p class="MsoNormal"> /opt/jdx/tools/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/x86_64-wrs-linux/x86_64-wrs-linux-ld: error: cannot find -lgcc<u></u><u></u></p>
<p class="MsoNormal"> clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">crtbegin.o is in /home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib64/x86_64-wrs-linux/5.2.0/crtbegin.o When I copy the missing files to /home/repo/jdx/wr8-baytrail_64/buildbox/usr/lib64
cmake passes and but the build fails on unable to find <string> and <vector>, I started to add include paths for jdx/wr8-baytrail_64/buildbox/usr/include/c++/5.2.0/ and that gets farther. However it is time to stop hacking the wrong way and fix the real problem.
I suspect the problem is related to clang not understanding my --target option and thus not asking gcc for the paths to the missing files, but I don’t really know how to make this work.
<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">A search finds
<a href="https://stackoverflow.com/questions/4160262/clang-linker-problem" target="_blank" rel="noreferrer">
https://stackoverflow.com/questions/4160262/clang-linker-problem</a>, but it isn’t helpful because the code in that area has changed so much.
<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">My host is x86-64 linux. The target OS is x86_64 embedded linux (the sysroot is NOT compatible with the host libraries)<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Can someone give me a hint about where I should look to make this work. I can change either the command line arguments or the clang source code but I’m not clear on where the right
place to look is.<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal">_______________________________________________<br>
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</blockquote>
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</div>
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