[cfe-dev] Build Clang on x86_64 (ubuntu) with arm-linux-gnueabihf failed

Tue Oct 8 08:48:19 PDT 2013

Thanks, James.

I will give it a try right now!

2013/10/8 James Molloy <james at jamesmolloy.co.uk>

> Hi Anton,
>
> I'm very confused about your setup. The subject of these emails suggests
> you want to use arm-linux-gnueabihf, but the CMake verbose output you
> showed shows you've told it to use clang++ (/usr/local/bin/clang++
> -target armv7a-linux-gnueabihf). The compiler flags also seem to be a
> frankenmix of x86 and ARM ( -L/usr/lib/gcc/x86_64-linux-gnu/4.7 is never
> gonna work!)
>
> I managed a build without any problems using:
>
> mkdir build; cd build; cmake .. -DCMAKE_C_COMPILER=arm-linux-gnueabihf-gcc
> -DCMAKE_CXX_COMPILER=arm-linux-gnueabihf-g++ -DCMAKE_SYSTEM_NAME=Linux
>
> As the CMake cross-compilation wiki says, "CMAKE_SYSTEM_NAME" is very
> important as it tells CMake that it's cross compiling.
>
> I also went and looked at the wiki page you quoted, and went and tried it
> out. That page is written for someone who wants to cross compile *with
> clang*. You want to cross-compile with gcc, so there are some changes you
> need to make.
>
> You must remove the "-target" parameter. You must also remove the
> "-ccc-gcc-name" parameter. You also still need the CMAKE_C_COMPILER and
> CMAKE_CXX_COMPILER arguments. So the line becomes:
>
> cmake ..
> -DCMAKE_C_COMPILER=/work/tools/linaro/gnueabi/2013.08-20130816/bin/arm-linux-gnueabihf-gcc
> -DCMAKE_CXX_COMPILER=/work/tools/linaro/gnueabi/2013.08-20130816/bin/arm-linux-gnueabihf-g++
> -DCMAKE_CROSSCOMPILING=True
> -DLLVM_TABLEGEN=/work/llvm/build7/../build6/native/bin/llvm-tblgen
> -DLLVM_DEFAULT_TARGET_TRIPLE=arm-linux-gnueabihf -DLLVM_TARGET_ARCH=ARM
> -DLLVM_TARGETS_TO_BUILD=ARM -DCMAKE_CXX_FLAGS=' -mcpu=cortex-a9
> -I/usr/arm-linux-gnueabihf/include/c++/4.7.2/arm-linux-gnueabihf/
> -I/usr/arm-linux-gnueabihf/include/ -mfloat-abi=hard'
>
> Where '/work/llvm/build7/../build6/native/bin' is the location of a
> previously-built x86 llvm-tblgen.
>
> Hopefully this has helped. My preference would be the first command line I
> pasted - using -DCMAKE_SYSTEM_NAME=Linux. That seems the simplest way to
> me, and it gets LLVM to auto-create its own native llvm-tblgen.
>
> Cheers,
>
> James
>
>
>
> On 8 October 2013 09:07, Anton Smirnov <dev at antonsmirnov.name> wrote:
>
>> I can confirm that after editing there is no -L/lib64 in invocation line,
>> but the problem remains. I think previously compiled files were
>> compiled/linked with -L/lib64 and this
>> corrupts the build.
>>
>> How can it be fixed/walked-around?
>>
>>
>> 2013/10/8 Anton Smirnov <dev at antonsmirnov.name>
>>
>>> As far as i understood, invocation line is saved in
>>> CMakeFiles/llvm-tblgen.dir/link.txt.
>>> I've edited it to remove -L/lib64 and invoked the last command line
>>> manually but the problem remains.
>>>
>>> What can i do in order to avoid adding -L/lib64 ?
>>>
>>> Thanks,
>>> Anton
>>>
>>>
>>> 2013/10/8 Anton Smirnov <dev at antonsmirnov.name>
>>>
>>>> Hello.
>>>>
>>>> Similar question to what i asked few days ago but was not resolved.
>>>>
>>>> I've followed guide (http://llvm.org/docs/HowToCrossCompileLLVM.html)
>>>> step-by-step.
>>>> The only changes i've done is installed g++ package since i've received
>>>> "no g++ found" on clear virtual machine (ubuntu 13.04_64).
>>>>
>>>> First i've compiled for host (to use tblgens), then for ARM.
>>>> When cross-compiling for ARM (tried both ninja and autotools) i'm
>>>> getting linker error:
>>>>
>>>> Linking CXX executable ../../bin/llvm-tblgen
>>>> ../../lib/libLLVMSupport.a: could not read symbols: File format not
>>>> recognized
>>>> clang: error: linker command failed with exit code 1 (use -v to see
>>>> invocation)
>>>> make[2]: *** [bin/llvm-tblgen] Error 1
>>>> make[1]: *** [utils/TableGen/CMakeFiles/llvm-tblgen.dir/all] Error 2
>>>>
>>>> Verbose output (make VERBOSE=1):
>>>>
>>>> cd /home/asmirnov/llvm_arm_cmake_build/utils/TableGen && /usr/bin/cmake
>>>> -E cmake_link_script CMakeFiles/llvm-tblgen.dir/link.txt --verbose=1
>>>> /usr/local/bin/clang++   -target armv7a-linux-gnueabihf -mcpu=cortex-a9
>>>> -I/usr/arm-linux-gnueabihf/include/c++/4.7.3/arm-linux-gnueabihf/
>>>> -I/usr/arm-linux-gnueabihf/include/ -mfloat-abi=hard -ccc-gcc-name
>>>> arm-linux-gnueabihf-gcc -Wall -W -Wno-unused-parameter -Wwrite-strings
>>>> -Wmissing-field-initializers -pedantic -Wno-long-long
>>>> -Wcovered-switch-default -Wnon-virtual-dtor -fno-rtti -O3 -DNDEBUG
>>>> CMakeFiles/llvm-tblgen.dir/AsmMatcherEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/AsmWriterEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/AsmWriterInst.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CallingConvEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CodeEmitterGen.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CodeGenDAGPatterns.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CodeGenInstruction.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CodeGenMapTable.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CodeGenRegisters.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CodeGenSchedule.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CodeGenTarget.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/DAGISelEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/DAGISelMatcherEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/DAGISelMatcherGen.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/DAGISelMatcherOpt.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/DAGISelMatcher.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/DFAPacketizerEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/DisassemblerEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/FastISelEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/FixedLenDecoderEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/InstrInfoEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/IntrinsicEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/OptParserEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/PseudoLoweringEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/RegisterInfoEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/SetTheory.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/SubtargetEmitter.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/TGValueTypes.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/TableGen.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/X86DisassemblerTables.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/X86ModRMFilters.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/X86RecognizableInstr.cpp.o
>>>> CMakeFiles/llvm-tblgen.dir/CTagsEmitter.cpp.o  -o ../../bin/llvm-tblgen
>>>> -L/usr/lib/gcc/x86_64-linux-gnu/4.7  -L/lib64  ../../lib/libLLVMTableGen.a
>>>> ../../lib/libLLVMSupport.a -lrt -ldl -lpthread -lpthread
>>>> ../../lib/libLLVMSupport.a: could not read symbols: File format not
>>>> recognized
>>>> clang: error: linker command failed with exit code 1 (use -v to see
>>>> invocation)
>>>> make[2]: *** [bin/llvm-tblgen] Error 1
>>>> make[2]: Leaving directory `/home/asmirnov/llvm_arm_cmake_build'
>>>> make[1]: *** [utils/TableGen/CMakeFiles/llvm-tblgen.dir/all] Error 2
>>>> make[1]: Leaving directory `/home/asmirnov/llvm_arm_cmake_build'
>>>> make: *** [all] Error 2
>>>>
>>>>  Can it be walked-around by invocation without -L/lib64 ?
>>>>
>>>> Anton
>>>>
>>>>
>>>
>>
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>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>
>>
>
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