<div dir="ltr">Right, I think that you can't use hard-float for your compiler ABI. You will need to recompile things with soft-float. The NDK does not supply any hard-float libraries to link against, so by passing -mfloat-abi=hard, you are still picking up the soft-float versions (and hence getting link errors).<div>
<br></div><div>Steve</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Oct 9, 2013 at 9:11 AM, Anton Smirnov <span dir="ltr"><<a href="mailto:dev@antonsmirnov.name" target="_blank">dev@antonsmirnov.name</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Sorry, Stephen*.</div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">
2013/10/9 Anton Smirnov <span dir="ltr"><<a href="mailto:dev@antonsmirnov.name" target="_blank">dev@antonsmirnov.name</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi, Steven.<div><br></div><div>That's exactly what i'm having now!</div><div><br></div><div>I've tried to solve it by adding LOCAL_EXPORT_CPPFLAGS := -mfpu=vfp -mfloat-abi=hard in Android.mk and APP_ABI := armeabi-v7a in Application.mk but it did not help unfortunately.</div>
<div>I'm using android log (#include <android/log.h>, #include <stdio.h> and #include <string.h>) is this the reason of linking error?</div><div><br></div><div>Do you know how can it be solved?</div>
<div><br></div><div>PS. i've tried ndk-build v=1 to see actual command line and it seems that i can just use linker from arm-linux-gnueabihf toolchains.. How do you think</div><div>will it help?</div></div><div>
<div><div class="gmail_extra">
<br><br><div class="gmail_quote">2013/10/9 Stephen Hines <span dir="ltr"><<a href="mailto:srhines@google.com" target="_blank">srhines@google.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">If you are using Android's NDK, you should be aware that it targets soft-float for all ARM ABIs. Thus, if you are linking against any of the NDK components, they are not going to match a hard-float piece that you have built from scratch.<div>
<br></div><div>Steve</div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Oct 8, 2013 at 11:41 AM, James Molloy <span dir="ltr"><<a href="mailto:james@jamesmolloy.co.uk" target="_blank">james@jamesmolloy.co.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Anton,<div><br></div><div>Ensure -mfloat-abi=hard is in your CFLAGS and CXXFLAGS. Also ensure you target a recent-ish processor or -march=armv7.</div>
<div><br></div><div>I can't really give support on the android linker, but it does look like your resulting binary is soft-float.</div><span><font color="#888888">
<div><br></div><div>James</div></font></span></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On 8 October 2013 19:29, Anton Smirnov <span dir="ltr"><<a href="mailto:dev@antonsmirnov.name" target="_blank">dev@antonsmirnov.name</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi.<div><br></div><div>I've succeed to compile clang for ARM using ubuntu ..gnueabihf.. packages, but libclang.so can't be stripped</div>
<div>using tool from ndk because of error:</div><div><br></div>
<div>/softdev/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: /Users/asmirnov/Documents/dev/src/clang_jni/obj/local/armeabi/libclang.so uses VFP register arguments, output does not<br>
</div><div><br></div><div>Not sure what's wrong now since i've passed cpu and float (hard) as parameters. Any suggestions?</div><div>BTW I'm going to use it on android devices which are ARM hard float.</div><div>
<br></div><div>I'm going to try to compile it with linaro toolchain tomorrow on 32bit vm as it does not work on 64bit (or i was not able just to find it for 64bit).</div><div><br></div><div>Thanks,</div><div>Anton.</div>
</div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/10/8 James Molloy <span dir="ltr"><<a href="mailto:james@jamesmolloy.co.uk" target="_blank">james@jamesmolloy.co.uk</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Anton,<div><br></div><div>The compiler I'm using is this one: <a href="https://launchpad.net/gcc-linaro/+milestone/4.8-2013.08" target="_blank">https://launchpad.net/gcc-linaro/+milestone/4.8-2013.08</a> . This just happens to be the latest linaro compiler installed on the central package database at ARM. I'd assume the ubuntu one would work just as well.</div>
<div><br></div><div>Cheers,</div><div><br></div><div>James</div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On 8 October 2013 17:09, Anton Smirnov <span dir="ltr"><<a href="mailto:dev@antonsmirnov.name" target="_blank">dev@antonsmirnov.name</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I've noticed you've used linaro toolchain instead of ubuntu's gcc-4.7-arm-linux-gnueabihf (and other packages from <a href="http://llvm.org/docs/HowToCrossCompileLLVM.html" target="_blank">http://llvm.org/docs/HowToCrossCompileLLVM.html</a>).<div>
Can you write what packages should be downloaded and installed from <a href="http://www.linaro.org/downloads/" target="_blank">http://www.linaro.org/downloads/</a> ?</div><div><br></div><div>Thanks and regards,</div><div>
Anton.</div></div><div><div>
<div class="gmail_extra"><br><br><div class="gmail_quote">2013/10/8 Anton Smirnov <span dir="ltr"><<a href="mailto:dev@antonsmirnov.name" target="_blank">dev@antonsmirnov.name</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Thanks, James.<div><br></div><div>I will give it a try right now!</div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/10/8 James Molloy <span dir="ltr"><<a href="mailto:james@jamesmolloy.co.uk" target="_blank">james@jamesmolloy.co.uk</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Anton,<div><br></div><div>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!)</div>
<div><br></div><div>I managed a build without any problems using:</div><div><br></div><div>mkdir build; cd build; cmake .. -DCMAKE_C_COMPILER=arm-linux-gnueabihf-gcc -DCMAKE_CXX_COMPILER=arm-linux-gnueabihf-g++ -DCMAKE_SYSTEM_NAME=Linux</div>
<div><br></div><div>As the CMake cross-compilation wiki says, "CMAKE_SYSTEM_NAME" is very important as it tells CMake that it's cross compiling.</div><div><br></div><div>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.</div>
<div><br></div><div>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:</div>
<div><br></div><div>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'<br>
</div><div><br></div><div>Where '/work/llvm/build7/../build6/native/bin' is the location of a previously-built x86 llvm-tblgen.</div><div><br></div><div>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.</div>
<div><br></div><div>Cheers,</div><div><br></div><div>James</div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div>On 8 October 2013 09:07, Anton Smirnov <span dir="ltr"><<a href="mailto:dev@antonsmirnov.name" target="_blank">dev@antonsmirnov.name</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div dir="ltr">I can confirm that after editing there is no -L/lib64 in invocation line,<div>
but the problem remains. I think previously compiled files were compiled/linked with -L/lib64 and this</div>
<div>corrupts the build.</div>
<div><br></div><div>How can it be fixed/walked-around?</div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/10/8 Anton Smirnov <span dir="ltr"><<a href="mailto:dev@antonsmirnov.name" target="_blank">dev@antonsmirnov.name</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">As far as i understood, invocation line is saved in <span style="font-family:arial,sans-serif;font-size:13px">CMakeFiles/llvm-tblgen.dir/</span><span style="font-family:arial,sans-serif;font-size:13px">link.txt.</span><div>
<span style="font-family:arial,sans-serif;font-size:13px">I've edited it to remove -L/lib64 and invoked the last command line manually but the problem remains.</span></div><div><span style="font-family:arial,sans-serif;font-size:13px"><br>
</span></div><div><span style="font-family:arial,sans-serif;font-size:13px">What can i do in order to avoid adding -L/lib64 ?</span></div><div><span style="font-family:arial,sans-serif;font-size:13px"><br></span></div><div>
<span style="font-family:arial,sans-serif;font-size:13px">Thanks,</span></div><div><span style="font-family:arial,sans-serif;font-size:13px">Anton</span></div></div><div><div><div class="gmail_extra">
<br><br><div class="gmail_quote">
2013/10/8 Anton Smirnov <span dir="ltr"><<a href="mailto:dev@antonsmirnov.name" target="_blank">dev@antonsmirnov.name</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hello.<div><br></div><div>Similar question to what i asked few days ago but was not resolved. </div><div><br></div><div>I've followed guide (<a href="http://llvm.org/docs/HowToCrossCompileLLVM.html" target="_blank">http://llvm.org/docs/HowToCrossCompileLLVM.html</a>) step-by-step.</div>
<div>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).</div><div><br></div><div>First i've compiled for host (to use tblgens), then for ARM.</div>
<div>When cross-compiling for ARM (tried both ninja and autotools) i'm getting linker error:</div><div><br></div><div>Linking CXX executable ../../bin/llvm-tblgen<br>../../lib/libLLVMSupport.a: could not read symbols: File format not recognized<br>
clang: error: linker command failed with exit code 1 (use -v to see invocation)<br>make[2]: *** [bin/llvm-tblgen] Error 1<br>make[1]: *** [utils/TableGen/CMakeFiles/llvm-tblgen.dir/all] Error 2<br><br></div><div>Verbose output (make VERBOSE=1):<br>
<br>cd /home/asmirnov/llvm_arm_cmake_build/utils/TableGen && /usr/bin/cmake -E cmake_link_script CMakeFiles/llvm-tblgen.dir/link.txt --verbose=1<br>/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 <br>
../../lib/libLLVMSupport.a: could not read symbols: File format not recognized<br>clang: error: linker command failed with exit code 1 (use -v to see invocation)<br>make[2]: *** [bin/llvm-tblgen] Error 1<br>make[2]: Leaving directory `/home/asmirnov/llvm_arm_cmake_build'<br>
make[1]: *** [utils/TableGen/CMakeFiles/llvm-tblgen.dir/all] Error 2<br>make[1]: Leaving directory `/home/asmirnov/llvm_arm_cmake_build'<br>make: *** [all] Error 2<br><br></div><div> Can it be walked-around by invocation without -L/lib64 ?</div>
<span><font color="#888888">
<div><br></div><div>Anton</div><div><br></div></font></span></div>
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