[llvm-dev] Compiling for baremetal ARMv4 on Ubuntu Linux (original) (raw)

Peter Smith via llvm-dev llvm-dev at lists.llvm.org
Fri Dec 14 09:28:02 PST 2018

Hello again Christian,

I've posted https://reviews.llvm.org/D55709 to see if we can get the documentation on how to cross-compile compiler-rt improved. I'll be out of office until next year so I may be a bit slow to respond to any follow ups.

Peter

On Thu, 13 Dec 2018 at 17:10, Peter Smith <peter.smith at linaro.org> wrote:

Hello Christian, I've just retried the runtimes way of building for v6m, v7m and v7e-m . My cmake command was ARMEABIGCC=/path/to/gcceabi/arm-none-eabi _cmake _ _-G Ninja_ _-DBAREMETALARMV6MSYSROOT=${ARMEABIGCC}_ _-DBAREMETALARMV7MSYSROOT=${ARMEABIGCC}_ _-DBAREMETALARMV7EMSYSROOT=${ARMEABIGCC}_ _-DCMAKEBUILDTYPE=Release_ _-C/path/to/llvm/tools/clang/cmake/caches/BaremetalARM.cmake _ /path/to/llvm The cache file requires clang and lld. From the build directory they will go into lib/clang. That worked for me (TM). Hopefully if you can edit the paths it will work for you. My guess is that you'll want to set ARMEABIGCC=/home/crichter/Downloads/gcc-arm-none-eabi-54-2016q3/arm-none-eabi Peter On Thu, 13 Dec 2018 at 12:08, Christian Richter <christian.richter at hsu-hh.de> wrote: > > Hello Peter and Lists, > > thanks a lot, that way it worked out! The final cmake was > > cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILERRTBUILDBUILTINS=ON -DCOMPILERRTBUILDSANITIZERS=OFF -DCOMPILERRTBUILDXRAY=OFF -DCOMPILERRTBUILDLIBFUZZER=OFF -DCOMPILERRTBUILDPROFILE=OFF -DCMAKECCOMPILER=/usr/local/myclang/bin/clang -DCMAKEAR=/usr/local/myclang/bin/llvm-ar -DCMAKENM=/usr/local/myclang/bin/llvm-nm -DCMAKERANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKETRYCOMPILETARGETTYPE=STATICLIBRARY -DCMAKECCOMPILERTARGET="arm-linux-gnueabihf" -DCOMPILERRTDEFAULTTARGETONLY=ON -DLLVMCONFIGPATH=/usr/local/myclang/bin/llvm-config -DCMAKEASMFLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/home/crichter/arm-linux-gnueabihf/gcc-arm --sysroot=/home/crichter/arm-linux-gnueabihf/sysroot-glibc/" -DCMAKECFLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/home/crichter/arm-linux-gnueabihf/gcc-arm --sysroot=/home/crichter/arm-linux-gnueabihf/sysroot-glibc/" > > where sysroot-glibc/ contains sysroot-glibc-8.2-x8664 and /arm-linux-gnueabihf/gcc-arm contains gcc-arm-8.2 for Aarch32 hard float from https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads. This resulted in successfully building libclangrt.builtins-armhf.a > > So next, I tried to use the cmake recipe for BaremetalARM as in the documentation. Therefore, I moved the compiler-rt directory from llvm/projects to llvm/runtimes. I downloaded the latest updates of gcc-arm-none-eabi6/7/8 from https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads and tried to build in a new directory. But whether I gave the -C the path to BaremetalARM.cmake's directory or the file itself, nothing started. I was unsure whether to keep the paths to llvm-ar, llvm-nm and so on as well and whether or not to give the new compiler-rt-directory or the whole llvm-directory as a starting point. Am I using the wrong build directory here? Is this still "Ninja"? The error message (see below) is true: /home/llvm4rt/llvm/tools/clang/cmake/caches contains no CMakeLists.txt, just the BaremetalARM.cmake among other recipes. Giving -C the file directly just leads to a "this is a file, not a directory" error. > > This is (one of my) cmake commands: > > root at christian-forschung-virtual-machine:/home/llvm4rt/buildrecipe# cmake -G "Ninja" ../llvm/runtimes/compiler-rt -DCOMPILERRTBUILDBUILTINS=ON -DCOMPILERRTBUILDSANITIZERS=OFF -DCOMPILERRTBUILDXRAY=OFF -DCOMPILERRTBUILDLIBFUZZER=OFF -DCOMPILERRTBUILDPROFILE=OFF -DCMAKECCOMPILER=/usr/local/myclang/bin/clang -DCMAKEAR=/usr/local/myclang/bin/llvm-ar -DCMAKENM=/usr/local/myclang/bin/llvm-nm -DCMAKERANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKETRYCOMPILETARGETTYPE=STATICLIBRARY -DCMAKECCOMPILERTARGET="arm-linux-gnueabihf" -DCOMPILERRTDEFAULTTARGETONLY=ON -DLLVMCONFIGPATH=/usr/local/myclang/bin/llvm-config -DBAREMETALARMV5MSYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-54-2016q3 > -DBAREMETALARMV6MSYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-6-2017-q2-update -DBAREMETALARMV7MSYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-7-2018-q2-update -C /home/llvm4rt/llvm/tools/clang/cmake/caches > > loading initial cache file /home/llvm4rt/llvm/tools/clang/cmake/caches > CMake Error: Error processing file: /home/llvm4rt/llvm/tools/clang/cmake/caches > CMake Error: The source directory "/home/llvm4rt/llvm/tools/clang/cmake/caches" does not appear to contain CMakeLists.txt. > Specify --help for usage, or press the help button on the CMake GUI. > > So I'm obviously using it wrong, would appreciate any pointers in the right direction! > Christian > > > On 10.12.2018 17:59, Peter Smith wrote: > > Hello Christian, > > Yes it does look like clang will add /usr/local/include unless > --nostdinc is used, although that will mean skipping a lot of other > include directories that clang will implicitly add based on the > target. I can think of a couple of ways to proceed: > 1.) use -nostdinc and add in the directories you need manually > 2.) use a cross gcc toolchain in a different directory such as one > from (https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads) > and use --gcc-toolchain and --sysroot. > > I must admit I've only ever done 2.) myself as I've wanted to make > sure I've not inadvertently depended on something on my machine. > > Apologies for the confusion. > > Peter > > On Mon, 10 Dec 2018 at 16:05, Christian Richter > <christian.richter at hsu-hh.de> wrote: > > Hello again! > > Tried out the small Hello World Setup, worked as intended: > > root at christian-forschung-virtual-machine:/home/progs# clang -v --target=arm-linux-gnueabihf hello.c -o hello -fuse-ld=lld > clang version 8.0.0 (https://git.llvm.org/git/clang.git/ a152c7a4b7ba8f4cb9532ead9a38a7121db43d50) (https://git.llvm.org/git/llvm.git/ 1959ce6f3e01241919968ac1911fd45660239d23) > Target: arm-unknown-linux-gnueabihf > Thread model: posix > InstalledDir: /usr/local/myclang/bin > Found candidate GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7 > Found candidate GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 > Selected GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 > Candidate multilib: .;@m32 > Selected multilib: .;@m32 > "/usr/local/myclang/bin/clang-8" -cc1 -triple armv6kz-unknown-linux-gnueabihf -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name hello.c -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -fuse-init-array -target-cpu arm1176jzf-s -target-feature +strict-align -target-abi aapcs-linux -mfloat-abi hard -fallow-half-arguments-and-returns -dwarf-column-info -debugger-tuning=gdb -v -resource-dir /usr/local/myclang/lib/clang/8.0.0 -internal-isystem /usr/local/include -internal-isystem /usr/local/myclang/lib/clang/8.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir /home/progs -ferror-limit 19 -fmessage-length 202 -fno-signed-char -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/hello-98a3a7.o -x c hello.c -faddrsig > clang -cc1 version 8.0.0 based upon LLVM 8.0.0svn default target x8664-unknown-linux-gnu > ignoring nonexistent directory "/include" > #include "..." search starts here: > #include <...> search starts here: > /usr/local/include > /usr/local/myclang/lib/clang/8.0.0/include > /usr/include > End of search list. > "/usr/local/myclang/bin/ld.lld" -EL -z relro -X --hash-style=gnu --eh-frame-hdr -m armelflinuxeabi -dynamic-linker /lib/ld-linux-armhf.so.3 -o hello /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crt1.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crti.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/crtbegin.o -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../lib -L/usr/local/myclang/bin/../lib -L/lib/../lib -L/usr/lib/../lib -L/usr/lib/arm-linux-gnueabihf/../../lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../.. -L/usr/local/myclang/bin/../lib -L/lib -L/usr/lib /tmp/hello-98a3a7.o -lgcc --as-needed -lgccs --no-as-needed -lc -lgcc --as-needed -lgccs --no-as-needed /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/crtend.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crtn.o > > root at christian-forschung-virtual-machine:/home/progs# qemu-arm -L /usr/arm-linux-gnueabihf hello > > Hello, World! > > So far, so good. The Paths written more readable seem to be > > /usr/local/myclang/lib, /lib, /usr/lib, /usr/arm-linux-gnueabihf/lib, so no surprised there. > > Then I added the suggested -DCMAKEASMFLAGS to the cmake for the standalone compiler-rt build while leaving out the --sysroot and --gcc-toolchain: > > cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILERRTBUILDBUILTINS=ON -DCOMPILERRTBUILDSANITIZERS=OFF -DCOMPILERRTBUILDXRAY=OFF -DCOMPILERRTBUILDLIBFUZZER=OFF -DCOMPILERRTBUILDPROFILE=OFF -DCMAKECCOMPILER=/usr/local/myclang/bin/clang -DCMAKEAR=/usr/local/myclang/bin/llvm-ar -DCMAKENM=/usr/local/myclang/bin/llvm-nm -DCMAKERANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKETRYCOMPILETARGETTYPE=STATICLIBRARY -DCMAKECCOMPILERTARGET="arm-linux-gnueabihf" -DCOMPILERRTDEFAULTTARGETONLY=ON -DLLVMCONFIGPATH=/usr/local/myclang/bin/llvm-config -DCMAKEASMFLAGS="--target=arm-linux-gnueabihf -march=armv7a" -DCMAKECFLAGS="--target=arm-linux-gnueabihf -march=armv7a" > > now "ninja builtins" at least starts working, but fails after a while (see below). The error seems similar to http://lists.llvm.org/pipermail/llvm-dev/2011-September/043289.html to me, so it might still be some variant of the problem from before: Using a x86-header where an ARM one would be needed. > > The ninja builtins output: > > root at christian-forschung-virtual-machine:/home/llvmall/buildrtonly# ninja builtins > [147/207] Building C object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/emutls.c.o > FAILED: lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/emutls.c.o > /usr/local/myclang/bin/clang --target=arm-linux-gnueabihf -DVISIBILITYHIDDEN --target=arm-linux-gnueabihf -march=armv7a -Wall -Wno-unused-parameter -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILERRTARMHFTARGET -MD -MT lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/emutls.c.o -MF lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/emutls.c.o.d -o lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/emutls.c.o -c /home/llvmall/llvm/projects/compiler-rt/lib/builtins/emutls.c > In file included from /home/llvmall/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: > /usr/include/pthread.h:682:6: error: 'regparm' is not valid on this platform _> cleanupfctattribute; > ^~~~~~~~~~~~~~~~~~~~~~~ _> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro 'cleanupfctattribute' _> # define cleanupfctattribute attribute ((regparm (1))) > ^ ~ > In file included from /home/llvmall/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: > /usr/include/pthread.h:694:3: error: 'regparm' is not valid on this platform _> cleanupfctattribute; > ^~~~~~~~~~~~~~~~~~~~~~~ _> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro 'cleanupfctattribute' _> # define cleanupfctattribute attribute ((regparm (1))) > ^ ~ > In file included from /home/llvmall/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: > /usr/include/pthread.h:735:6: error: 'regparm' is not valid on this platform _> cleanupfctattribute attribute ((noreturn)) > ^~~~~~~~~~~~~~~~~~~~~~~ _> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro 'cleanupfctattribute' _> # define cleanupfctattribute attribute ((regparm (1))) > ^ ~ > 3 errors generated. > [148/207] Building C object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/gccpersonalityv0.c.o > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:148:47: warning: declaration of 'struct UnwindException' will not be visible outside of this function [-Wvisibility] _> UnwindReasonCode gnuunwindframe(struct UnwindException *, > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:153:23: warning: declaration of 'struct UnwindException' will not be visible outside of this function [-Wvisibility] > continueUnwind(struct UnwindException *exceptionObject, > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:160:28: warning: incompatible pointer types passing 'struct UnwindException *' to parameter of type 'struct UnwindException *' [-Wincompatible-pointer-types] _> if (gnuunwindframe(exceptionObject, context) != URCOK) > ^~~~~~~~~~~~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:148:66: note: passing argument to parameter here _> UnwindReasonCode gnuunwindframe(struct UnwindException *, > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:184:38: warning: declaration of 'struct UnwindException' will not be visible outside of this function [-Wvisibility] > UnwindState state, struct UnwindException *exceptionObject, > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:202:31: warning: incompatible pointer types passing 'struct UnwindException *' to parameter of type 'struct UnwindException *' [-Wincompatible-pointer-types] > return continueUnwind(exceptionObject, context); > ^~~~~~~~~~~~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:153:42: note: passing argument to parameter 'exceptionObject' here > continueUnwind(struct UnwindException *exceptionObject, > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:207:31: warning: incompatible pointer types passing 'struct UnwindException *' to parameter of type 'struct UnwindException *' [-Wincompatible-pointer-types] > return continueUnwind(exceptionObject, context); > ^~~~~~~~~~~~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:153:42: note: passing argument to parameter 'exceptionObject' here > continueUnwind(struct UnwindException *exceptionObject, > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:250:27: warning: incompatible pointer types passing 'struct UnwindException *' to parameter of type 'struct UnwindException *' [-Wincompatible-pointer-types] > return continueUnwind(exceptionObject, context); > ^~~~~~~~~~~~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/gccpersonalityv0.c:153:42: note: passing argument to parameter 'exceptionObject' here > continueUnwind(struct UnwindException *exceptionObject, > ^ > 7 warnings generated. > [152/207] Building ASM object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/aeabicdcmp.S.o > ninja: build stopped: subcommand failed. > > Almost there! Thanks in advance! > > Christian > > > > On 07.12.2018 17:40, Peter Smith wrote: > > Hello Christian, > > I've put some comments inline > > On Fri, 7 Dec 2018 at 15:48, Christian Richter via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > > Hello, > > on the problems cross-building compiler-rt: Tried to follow https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html which lead to this cmake: > > cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILERRTBUILDBUILTINS=ON -DCOMPILERRTBUILDSANITIZERS=OFF -DCOMPILERRTBUILDXRAY=OFF -DCOMPILERRTBUILDLIBFUZZER=OFF -DCOMPILERRTBUILDPROFILE=OFF -DCMAKECCOMPILER=/usr/local/myclang/bin/clang -DCMAKEAR=/usr/local/myclang/bin/llvm-ar -DCMAKENM=/usr/local/myclang/bin/llvm-nm -DCMAKERANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKETRYCOMPILETARGETTYPE=STATICLIBRARY -DCMAKECCOMPILERTARGET="arm-linux-gnueabihf" -DCOMPILERRTDEFAULTTARGETONLY=ON -DLLVMCONFIGPATH=/usr/local/myclang/bin/llvm-config -DCMAKECFLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib" > > Some small notes: > > - Used -DCMAKETRYCOMPILETARGETTYPE=STATICLIBRARY instead of -DCMAKEEXELINKERFLAGS="-fuse-ld=lld" as Peter Smith suggested because it actually is a library and therefore does not need to be linked. If I do not change that, the cmake does not work (see below). > > - used -G "Ninja" although not explicitly stated in the tutorial as they use "ninja builtins" next. > > - had to change --march=armv7a to -march=armv7a as clang did not accept the first one. > > the cmake was successful, but the ninja builtins was not (see both outputs below). Am I doing the --gcc-toolchain / --sysroot part right? These are just the places where the result of "apt install arm-linux-gnueabihf" lives. > > cmake output with -DCMAKEEXELINKERFLAGS="-fuse-ld=lld": > > Thanks for the comments. I will try and revisit that document next > week and will post an update. > > root at christian-forschung-virtual-machine:/home/llvmall/buildrtonly# cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILERRTBUILDBUILTINS=ON -DCOMPILERRTBUILDSANITIZERS=OFF -DCOMPILERRTBUILDXRAY=OFF -DCOMPILERRTBUILDLIBFUZZER=OFF -DCOMPILERRTBUILDPROFILE=OFF -DCMAKECCOMPILER=/usr/local/myclang/bin/clang -DCMAKEAR=/usr/local/myclang/bin/llvm-ar -DCMAKENM=/usr/local/myclang/bin/llvm-nm -DCMAKERANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKEEXELINKERFLAGS="-fuse-ld=lld" -DCMAKECCOMPILERTARGET="arm-linux-gnueabihf" -DCOMPILERRTDEFAULTTARGETONLY=ON -DLLVMCONFIGPATH=/usr/local/myclang/bin/llvm-config -DCMAKECFLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib" > -- The C compiler identification is Clang 8.0.0 > -- The CXX compiler identification is Clang 8.0.0 > -- The ASM compiler identification is unknown > -- Found assembler: /usr/local/myclang/bin/clang > -- Check for working C compiler: /usr/local/myclang/bin/clang > -- Check for working C compiler: /usr/local/myclang/bin/clang -- broken > CMake Error at /usr/share/cmake-3.10/Modules/CMakeTestCCompiler.cmake:52 (message): > The C compiler > > "/usr/local/myclang/bin/clang" > > is not able to compile a simple test program. > > It fails with the following output: > > Change Dir: /home/llvmall/buildrtonly/CMakeFiles/CMakeTmp > > Run Build Command:"/usr/bin/ninja" "cmTC22d97" > [1/2] Building C object CMakeFiles/cmTC22d97.dir/testCCompiler.c.o > [2/2] Linking C executable cmTC22d97 > FAILED: cmTC22d97 > : && /usr/local/myclang/bin/clang --target=arm-linux-gnueabihf --target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib -fuse-ld=lld CMakeFiles/cmTC22d97.dir/testCCompiler.c.o -o cmTC22d97 && : > ld.lld: error: cannot open crt1.o: No such file or directory > ld.lld: error: cannot open crti.o: No such file or directory > ld.lld: error: cannot open crtbegin.o: No such file or directory > ld.lld: error: unable to find library -lgcc > ld.lld: error: unable to find library -lgccs > ld.lld: error: unable to find library -lc > ld.lld: error: unable to find library -lgcc > ld.lld: error: unable to find library -lgccs > ld.lld: error: cannot open crtend.o: No such file or directory > ld.lld: error: cannot open crtn.o: No such file or directory > clang-8: error: linker command failed with exit code 1 (use -v to see invocation) > ninja: build stopped: subcommand failed. > > CMake will not be able to correctly generate this project. > Call Stack (most recent call first): > CMakeLists.txt:10 (project) > -- Configuring incomplete, errors occurred! > See also "/home/llvmall/buildrtonly/CMakeFiles/CMakeOutput.log". > See also "/home/llvmall/buildrtonly/CMakeFiles/CMakeError.log". > > > Note: Googling this error suggested installing gcc-multilib or linking "sudo ln -s /usr/lib/x8664-linux-gnu /usr/lib64" (which both did not fix it). But the crt1.o that lld does not seem to find is probably the one from arm-linux-gnueabihf, right? "Locate" says it's right in /usr/arm-linux-gnueabihf/lib. > > The instructions to use --gcc-toolchain and --sysroot work well for a > separate toolchain install directory. They don't seem to work as well > for a debian multiarch style installation. I think it will be worth > trying to compile helloworld outside of cmake. If you can get that to > work then this might help guide us to what flags to use. > > On my ubuntu 16.04 machine I've got /usr/arm-linux-gnueabihf and > /usr/include/arm-linux-gnueabihf and /usr/lib/arm-linux-gnueabihf > With this configuration the clang linux driver is able to find the > libraries without the sysroot and gcc-toolchain as it is effectively > root. Can you try with a simple helloworld program: > clang --target=arm-linux-gnueabihf hello.c -o hello -fuse-ld=lld > qemu-arm -L /usr/arm-linux-gnueabihf hello > If all is well you should see qemu-arm print Hello World. You may need > to install the package qemu-user if you've not already done so. > > With the -v option clang will tell you where it is searching for > headers and libraries, I've often found that useful in trying to find > out what is going. > > Assuming that this has worked for you can you try removing > "--gcc-toolchain=/usr/arm-linux-gnueabihf > --sysroot=/usr/arm-linux-gnueabihf/lib" from your flags in the cmake > build. > > For the errors below it looks like clang is using the default target > for assembler, note that --target=arm-linux-gnueabihf is missing. I > have seen that before, and the solution I found was to pass > -DCMAKEASMFLAGS="same as C flags including > --target=arm-linux-gnueabihf and -march=armv7a" > > Thanks for reporting the problems. If I get time next week I'll have a > go at improving the documentation. > > Peter > > Thanks so far! > > Christian > > > cmake output with STATICLIBRARY: > > -- The C compiler identification is Clang 8.0.0 > -- The CXX compiler identification is Clang 8.0.0 > -- The ASM compiler identification is Clang > -- Found assembler: /usr/local/myclang/bin/clang > -- Check for working C compiler: /usr/local/myclang/bin/clang > -- Check for working C compiler: /usr/local/myclang/bin/clang -- works > -- Detecting C compiler ABI info > -- Detecting C compiler ABI info - done > -- Detecting C compile features > -- Detecting C compile features - done > -- Check for working CXX compiler: /usr/local/myclang/bin/clang++ > -- Check for working CXX compiler: /usr/local/myclang/bin/clang++ -- works > -- Detecting CXX compiler ABI info > -- Detecting CXX compiler ABI info - done > -- Detecting CXX compile features > -- Detecting CXX compile features - done > -- Looking for unwind.h > -- Looking for unwind.h - found > -- Found PythonInterp: /usr/bin/python2.7 (found version "2.7.15") > -- Looking for fopen in c > -- Looking for fopen in c - found _> -- Looking for gccpersonalityv0 in gccs _> -- Looking for gccpersonalityv0 in gccs - found > -- Performing Test COMPILERRTHASNODEFAULTLIBSFLAG > -- Performing Test COMPILERRTHASNODEFAULTLIBSFLAG - Success > -- Performing Test COMPILERRTHASFFREESTANDINGFLAG > -- Performing Test COMPILERRTHASFFREESTANDINGFLAG - Success > -- Performing Test COMPILERRTHASFPICFLAG > -- Performing Test COMPILERRTHASFPICFLAG - Success > -- Performing Test COMPILERRTHASFPIEFLAG > -- Performing Test COMPILERRTHASFPIEFLAG - Success > -- Performing Test COMPILERRTHASFNOBUILTINFLAG > -- Performing Test COMPILERRTHASFNOBUILTINFLAG - Success > -- Performing Test COMPILERRTHASFNOEXCEPTIONSFLAG > -- Performing Test COMPILERRTHASFNOEXCEPTIONSFLAG - Success > -- Performing Test COMPILERRTHASFOMITFRAMEPOINTERFLAG > -- Performing Test COMPILERRTHASFOMITFRAMEPOINTERFLAG - Success > -- Performing Test COMPILERRTHASFUNWINDTABLESFLAG > -- Performing Test COMPILERRTHASFUNWINDTABLESFLAG - Success > -- Performing Test COMPILERRTHASFNOSTACKPROTECTORFLAG > -- Performing Test COMPILERRTHASFNOSTACKPROTECTORFLAG - Success > -- Performing Test COMPILERRTHASFNOSANITIZESAFESTACKFLAG > -- Performing Test COMPILERRTHASFNOSANITIZESAFESTACKFLAG - Success > -- Performing Test COMPILERRTHASFVISIBILITYHIDDENFLAG > -- Performing Test COMPILERRTHASFVISIBILITYHIDDENFLAG - Success > -- Performing Test COMPILERRTHASFRTTIFLAG > -- Performing Test COMPILERRTHASFRTTIFLAG - Success > -- Performing Test COMPILERRTHASFNORTTIFLAG > -- Performing Test COMPILERRTHASFNORTTIFLAG - Success > -- Performing Test COMPILERRTHASFNOFUNCTIONSECTIONSFLAG > -- Performing Test COMPILERRTHASFNOFUNCTIONSECTIONSFLAG - Success > -- Performing Test COMPILERRTHASSTDCXX11FLAG > -- Performing Test COMPILERRTHASSTDCXX11FLAG - Success > -- Performing Test COMPILERRTHASFTLSMODELINITIALEXEC > -- Performing Test COMPILERRTHASFTLSMODELINITIALEXEC - Success > -- Performing Test COMPILERRTHASFNOLTOFLAG > -- Performing Test COMPILERRTHASFNOLTOFLAG - Success > -- Performing Test COMPILERRTHASMSSE3FLAG > -- Performing Test COMPILERRTHASMSSE3FLAG - Success > -- Performing Test COMPILERRTHASMSSE42FLAG > -- Performing Test COMPILERRTHASMSSE42FLAG - Success > -- Performing Test COMPILERRTHASSYSROOTFLAG > -- Performing Test COMPILERRTHASSYSROOTFLAG - Success > -- Performing Test COMPILERRTHASMCRCFLAG > -- Performing Test COMPILERRTHASMCRCFLAG - Failed > -- Performing Test COMPILERRTHASFVISIBILITYINLINESHIDDENFLAG > -- Performing Test COMPILERRTHASFVISIBILITYINLINESHIDDENFLAG - Success > -- Performing Test COMPILERRTHASGRFLAG > -- Performing Test COMPILERRTHASGRFLAG - Failed > -- Performing Test COMPILERRTHASGSFLAG > -- Performing Test COMPILERRTHASGSFLAG - Failed > -- Performing Test COMPILERRTHASMTFLAG > -- Performing Test COMPILERRTHASMTFLAG - Failed > -- Performing Test COMPILERRTHASOyFLAG > -- Performing Test COMPILERRTHASOyFLAG - Failed > -- Performing Test COMPILERRTHASGLINETABLESONLYFLAG > -- Performing Test COMPILERRTHASGLINETABLESONLYFLAG - Success > -- Performing Test COMPILERRTHASGFLAG > -- Performing Test COMPILERRTHASGFLAG - Success > -- Performing Test COMPILERRTHASZiFLAG > -- Performing Test COMPILERRTHASZiFLAG - Failed > -- Performing Test COMPILERRTHASWALLFLAG > -- Performing Test COMPILERRTHASWALLFLAG - Success > -- Performing Test COMPILERRTHASWERRORFLAG > -- Performing Test COMPILERRTHASWERRORFLAG - Success > -- Performing Test COMPILERRTHASWFRAMELARGERTHANFLAG > -- Performing Test COMPILERRTHASWFRAMELARGERTHANFLAG - Success > -- Performing Test COMPILERRTHASWGLOBALCONSTRUCTORSFLAG > -- Performing Test COMPILERRTHASWGLOBALCONSTRUCTORSFLAG - Success > -- Performing Test COMPILERRTHASWC99EXTENSIONSFLAG > -- Performing Test COMPILERRTHASWC99EXTENSIONSFLAG - Success > -- Performing Test COMPILERRTHASWGNUFLAG > -- Performing Test COMPILERRTHASWGNUFLAG - Success > -- Performing Test COMPILERRTHASWNONVIRTUALDTORFLAG > -- Performing Test COMPILERRTHASWNONVIRTUALDTORFLAG - Success > -- Performing Test COMPILERRTHASWVARIADICMACROSFLAG > -- Performing Test COMPILERRTHASWVARIADICMACROSFLAG - Success > -- Performing Test COMPILERRTHASWUNUSEDPARAMETERFLAG > -- Performing Test COMPILERRTHASWUNUSEDPARAMETERFLAG - Success > -- Performing Test COMPILERRTHASWCOVEREDSWITCHDEFAULTFLAG > -- Performing Test COMPILERRTHASWCOVEREDSWITCHDEFAULTFLAG - Success > -- Performing Test COMPILERRTHASW4FLAG > -- Performing Test COMPILERRTHASW4FLAG - Failed > -- Performing Test COMPILERRTHASWXFLAG > -- Performing Test COMPILERRTHASWXFLAG - Failed > -- Performing Test COMPILERRTHASWD4146FLAG > -- Performing Test COMPILERRTHASWD4146FLAG - Failed > -- Performing Test COMPILERRTHASWD4291FLAG > -- Performing Test COMPILERRTHASWD4291FLAG - Failed > -- Performing Test COMPILERRTHASWD4221FLAG > -- Performing Test COMPILERRTHASWD4221FLAG - Failed > -- Performing Test COMPILERRTHASWD4391FLAG > -- Performing Test COMPILERRTHASWD4391FLAG - Failed > -- Performing Test COMPILERRTHASWD4722FLAG > -- Performing Test COMPILERRTHASWD4722FLAG - Failed > -- Performing Test COMPILERRTHASWD4800FLAG > -- Performing Test COMPILERRTHASWD4800FLAG - Failed > -- Looking for func > -- Looking for func - found > -- Looking for dlopen in dl > -- Looking for dlopen in dl - found > -- Looking for shmopen in rt > -- Looking for shmopen in rt - found > -- Looking for pow in m > -- Looking for pow in m - found > -- Looking for pthreadcreate in pthread > -- Looking for pthreadcreate in pthread - found > -- Looking for setupterm in terminfo > -- Looking for setupterm in terminfo - found _> -- Looking for cxathrow in c++ _> -- Looking for cxathrow in c++ - found _> -- Looking for cxathrow in stdc++ _> -- Looking for cxathrow in stdc++ - found > -- Compiler-RT supported architectures: armhf > -- Performing Test COMPILERRTHASSTDC11FLAG > -- Performing Test COMPILERRTHASSTDC11FLAG - Success > -- Performing Test COMPILERRTHASVISIBILITYHIDDENFLAG > -- Performing Test COMPILERRTHASVISIBILITYHIDDENFLAG - Success > -- Performing Test COMPILERRTHASOMITFRAMEPOINTERFLAG > -- Performing Test COMPILERRTHASOMITFRAMEPOINTERFLAG - Success > -- Performing Test COMPILERRTHASFREESTANDINGFLAG > -- Performing Test COMPILERRTHASFREESTANDINGFLAG - Success > -- Performing Test COMPILERRTHASXRAYCOMPILERFLAG > -- Performing Test COMPILERRTHASXRAYCOMPILERFLAG - Success > -- Performing Test COMPILERRTHASATOMICKEYWORD > -- Performing Test COMPILERRTHASATOMICKEYWORD - Success > -- Builtin supported architectures: armhf > -- Looking for VFPFP > -- Looking for VFPFP - found > -- Configuring done > -- Generating done > -- Build files have been written to: /home/llvmall/buildrtonly > > -------------------------------------- > > ninja output: > > > root at christian-forschung-virtual-machine:/home/llvmall/buildrtonly# ninja builtins > > [1/207] Building ASM object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapsi2.S.o > FAILED: lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapsi2.S.o > /usr/local/myclang/bin/clang -DVISIBILITYHIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILERRTARMHFTARGET -MD -MT lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapsi2.S.o -MF lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapsi2.S.o.d -o lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapsi2.S.o -c /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:12:2: error: unknown directive > .syntax unified > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:25:3: error: invalid instruction mnemonic 'eor' > eor r1, r0, r0, ror #16 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:26:15: error: unknown token in expression > bic r1, r1, #0xff0000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:27:3: error: unknown use of instruction mnemonic without a size suffix > mov r1, r1, lsr #8 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:28:3: error: invalid instruction mnemonic 'eor' > eor r0, r1, r0, ror #8 > ^~~ > [2/207] Building ASM object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapdi2.S.o > FAILED: lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapdi2.S.o > /usr/local/myclang/bin/clang -DVISIBILITYHIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILERRTARMHFTARGET -MD -MT lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapdi2.S.o -MF lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapdi2.S.o.d -o lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/bswapdi2.S.o -c /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:12:2: error: unknown directive > .syntax unified > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:26:5: error: invalid instruction mnemonic 'eor' > eor r2, r0, r0, ror #16 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:27:17: error: unknown token in expression > bic r2, r2, #0xff0000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:28:5: error: unknown use of instruction mnemonic without a size suffix > mov r2, r2, lsr #8 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:29:5: error: invalid instruction mnemonic 'eor' > eor r2, r2, r0, ror #8 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:31:5: error: invalid instruction mnemonic 'eor' > eor r0, r1, r1, ror #16 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:32:17: error: unknown token in expression > bic r0, r0, #0xff0000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:33:5: error: unknown use of instruction mnemonic without a size suffix > mov r0, r0, lsr #8 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:34:5: error: invalid instruction mnemonic 'eor' > eor r0, r0, r1, ror #8 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:39:5: error: unknown use of instruction mnemonic without a size suffix > mov r1, r2 > ^ > [3/207] Building ASM object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/comparesf2.S.o > FAILED: lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/comparesf2.S.o > /usr/local/myclang/bin/clang -DVISIBILITYHIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILERRTARMHFTARGET -MD -MT lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/comparesf2.S.o -MF lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/comparesf2.S.o.d -o lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/comparesf2.S.o -c /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:41:2: error: unknown directive > .syntax unified > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:45:1: error: unexpected token at start of statement _> @ int eqsf2(float a, float b) > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:50:5: error: invalid operand for instruction > vmov r0, s0 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:51:5: error: invalid operand for instruction > vmov r1, s1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:53:5: error: unknown use of instruction mnemonic without a size suffix > mov r2, r0, lsl #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:54:5: error: unknown use of instruction mnemonic without a size suffix > mov r3, r1, lsl #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:56:5: error: invalid instruction mnemonic 'orrs' > orrs r12, r2, r3, lsr #1 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:58:5: error: invalid instruction mnemonic 'it' > it ne > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:59:5: error: invalid instruction mnemonic 'eorsne' > eorsne r12, r0, r1 > ^~~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:61:5: error: invalid instruction mnemonic 'it' > it pl > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:62:5: error: invalid instruction mnemonic 'subspl' > subspl r0, r2, r3 > ^~~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:64:5: error: invalid instruction mnemonic 'it' > it lo > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:65:5: error: invalid instruction mnemonic 'mvnlo' > mvnlo r0, r1, asr #31 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:67:5: error: invalid instruction mnemonic 'it' > it hi > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:68:5: error: invalid instruction mnemonic 'movhi' > movhi r0, r1, asr #31 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:70:5: error: invalid instruction mnemonic 'it' > it ne > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:71:19: error: unknown token in expression > orrne r0, r0, #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:167:13: error: unknown token in expression > cmp r2, #0xff000000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:168:5: error: invalid instruction mnemonic 'ite' > ite ls > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:169:15: error: unknown token in expression > cmpls r3, #0xff000000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:170:15: error: unknown token in expression > movhi r0, #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:179:1: error: unexpected token at start of statement _> @ int gtsf2(float a, float b) > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:188:5: error: invalid operand for instruction > vmov r0, s0 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:189:5: error: invalid operand for instruction > vmov r1, s1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:191:5: error: unknown use of instruction mnemonic without a size suffix > mov r2, r0, lsl #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:192:5: error: unknown use of instruction mnemonic without a size suffix > mov r3, r1, lsl #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:193:5: error: invalid instruction mnemonic 'orrs' > orrs r12, r2, r3, lsr #1 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:194:5: error: invalid instruction mnemonic 'it' > it ne > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:195:5: error: invalid instruction mnemonic 'eorsne' > eorsne r12, r0, r1 > ^~~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:196:5: error: invalid instruction mnemonic 'it' > it pl > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:197:5: error: invalid instruction mnemonic 'subspl' > subspl r0, r2, r3 > ^~~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:198:5: error: invalid instruction mnemonic 'it' > it lo > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:199:5: error: invalid instruction mnemonic 'mvnlo' > mvnlo r0, r1, asr #31 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:200:5: error: invalid instruction mnemonic 'it' > it hi > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:201:5: error: invalid instruction mnemonic 'movhi' > movhi r0, r1, asr #31 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:202:5: error: invalid instruction mnemonic 'it' > it ne > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:203:19: error: unknown token in expression > orrne r0, r0, #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:204:13: error: unknown token in expression > cmp r2, #0xff000000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:205:5: error: invalid instruction mnemonic 'ite' > ite ls > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:206:15: error: unknown token in expression > cmpls r3, #0xff000000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:207:15: error: unknown token in expression > movhi r0, #-1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:214:1: error: unexpected token at start of statement _> @ int unordsf2(float a, float b) > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:220:5: error: invalid operand for instruction > vmov r0, s0 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:221:5: error: invalid operand for instruction > vmov r1, s1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:224:18: error: unknown token in expression > lsls r2, r0, #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:225:18: error: unknown token in expression > lsls r3, r1, #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:226:14: error: unknown token in expression > movs r0, #0 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:277:13: error: unknown token in expression > cmp r2, #0xff000000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:278:5: error: invalid instruction mnemonic 'ite' > ite ls > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:279:15: error: unknown token in expression > cmpls r3, #0xff000000 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:280:15: error: unknown token in expression > movhi r0, #1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:287:2: error: invalid operand for instruction > vmov s0, r0 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:288:2: error: invalid operand for instruction > vmov s1, r1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:289:2: error: invalid instruction mnemonic 'b' _> b unordsf2 > ^ > [4/207] Building ASM object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzsi2.S.o > FAILED: lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzsi2.S.o > /usr/local/myclang/bin/clang -DVISIBILITYHIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILERRTARMHFTARGET -MD -MT lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzsi2.S.o -MF lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzsi2.S.o.d -o lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzsi2.S.o -c /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:16:2: error: unknown directive > .syntax unified > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix > mov r1, 1 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:33: error: invalid instruction mnemonic 'addeq' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:18: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:32: error: invalid instruction mnemonic 'addeq' > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:18: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:32: error: invalid instruction mnemonic 'addeq' > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:18: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:32: error: invalid instruction mnemonic 'addeq' > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:40:2: error: unknown use of instruction mnemonic without a size suffix > sub r0, r1, r0, lsr #1 > ^ > [5/207] Building ASM object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzdi2.S.o > FAILED: lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzdi2.S.o > /usr/local/myclang/bin/clang -DVISIBILITYHIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILERRTARMHFTARGET -MD -MT lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzdi2.S.o -MF lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzdi2.S.o.d -o lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/clzdi2.S.o -c /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:16:2: error: unknown directive > .syntax unified > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:50:2: error: unknown use of instruction mnemonic without a size suffix > cmp r1, 0 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:51:2: error: invalid instruction mnemonic 'movne' > movne r0, r1 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:53:2: error: invalid instruction mnemonic 'movne' > movne r1, 1 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:54:2: error: invalid instruction mnemonic 'moveq' > moveq r1, 33 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:19: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:33: error: invalid instruction mnemonic 'addeq' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:18: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:32: error: invalid instruction mnemonic 'addeq' > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:18: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:32: error: invalid instruction mnemonic 'addeq' > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > ^~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:18: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:32: error: invalid instruction mnemonic 'addeq' > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > ^~~~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:61:2: error: unknown use of instruction mnemonic without a size suffix > sub r0, r1, r0, lsr #1 > ^ > [6/207] Building ASM object lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/divmodsi4.S.o > FAILED: lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/divmodsi4.S.o > /usr/local/myclang/bin/clang -DVISIBILITYHIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILERRTARMHFTARGET -MD -MT lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/divmodsi4.S.o -MF lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/divmodsi4.S.o.d -o lib/builtins/CMakeFiles/clangrt.builtins-armhf.dir/arm/divmodsi4.S.o -c /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:24:2: error: unknown directive > .syntax unified > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:28:1: error: unexpected token at start of statement _> @ int divmodsi4(int divident, int divisor, int *remainder) > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:29:1: error: unexpected token at start of statement > @ Calculate the quotient and remainder of the (signed) division. The return > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:30:1: error: unexpected token at start of statement > @ value is the quotient, the remainder is placed in the variable. > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:46:11: error: Invalid rounding mode. > push {r4-r7, lr} ; add r7, sp, #12 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:46:36: error: unknown token in expression > push {r4-r7, lr} ; add r7, sp, #12 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:49:5: error: invalid instruction mnemonic 'eor' > eor r4, r0, r1 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:50:5: error: unknown use of instruction mnemonic without a size suffix > mov r5, r0 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:51:5: error: unknown use of instruction mnemonic without a size suffix > mov r6, r2 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:53:5: error: invalid instruction mnemonic 'eor' > eor ip, r0, r0, asr #31 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:54:5: error: invalid instruction mnemonic 'eor' > eor lr, r1, r1, asr #31 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:55:5: error: unknown use of instruction mnemonic without a size suffix > sub r0, ip, r0, asr #31 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:56:5: error: unknown use of instruction mnemonic without a size suffix > sub r1, lr, r1, asr #31 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:58:5: error: invalid instruction mnemonic 'bl' _> bl udivmodsi4 > ^~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:60:5: error: invalid instruction mnemonic 'ldr' > ldr r1, [r6] > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:61:5: error: invalid instruction mnemonic 'eor' > eor r0, r0, r4, asr #31 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:62:5: error: invalid instruction mnemonic 'eor' > eor r1, r1, r5, asr #31 > ^~~ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:63:5: error: unknown use of instruction mnemonic without a size suffix > sub r0, r0, r4, asr #31 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:64:5: error: unknown use of instruction mnemonic without a size suffix > sub r1, r1, r5, asr #31 > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:65:5: error: unknown use of instruction mnemonic without a size suffix > str r1, [r6] > ^ > /home/llvmall/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:66:10: error: Invalid rounding mode. > pop {r4-r7, pc} > > > > > > > > > > > > On 04.12.2018 15:54, Peter Smith via llvm-dev wrote: > > Hello, > > Just a few quick observations. > - It looks like you may have downloaded the linux arm toolchain. For bare metal you probably wanted the Arm embedded toolchain, https://developer.arm.com/open-source/gnu-toolchain/gnu-rm > -- That toolchain will have newlib rather than glibc, I don't know whether it will have one pre-compiled for v4 though. If not you may have to find an older toolchain or build newlib youtself. > - The bare-metal driver in clang (arm-none-eabi) is not multilib aware and won't put the paths to the libraries on the link line, the -L flag > -- I have found that following the samples in the gnu embedded toolchain with gcc using the -v flag to get the paths it is using, then use these with lld. > > If you can let us know what problems you are seeing building compiler-rt then we may be able to help. I'm not sure there is anyone building it for arm v4 so you may be hitting new problems. I'm away at a conference today and tomorrow but I can try later in the week. > > Peter > > On Tue, 4 Dec 2018 at 12:21, cscheuer via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > I am currently trying to compile a pretty simple program to work on an > experimental board. It contains an (FPGA-version of) an ARMv4 processor. > So basically, I try this (on my Ubuntu 18.04.1 LTS): > clang -v --target=arm-none-eabi -c barehello.c -o barehelloCLANG.o > clang -v --target=arm-none-eabi -c io.c -o io.o > clang -v --target=arm-none-eabi barehelloCLANG.o io.o -o > helloCLANGstatic -static -fuse-ld=lld > > Which results in > > clang version 8.0.0 (https://git.llvm.org/git/clang.git/ > a152c7a4b7ba8f4cb9532ead9a38a7121db43d50) > (https://git.llvm.org/git/llvm.git/ > 1959ce6f3e01241919968ac1911fd45660239d23) > Target: arm-none-unknown-eabi > Thread model: posix > InstalledDir: /usr/local/myclang/bin > "/usr/local/myclang/bin/ld.lld" barehelloCLANG.o io.o -Bstatic > -L/usr/local/myclang/lib/clang/8.0.0/lib/baremetal -lc -lm > -lclangrt.builtins-arm.a -o helloCLANGstatic > ld.lld: error: unable to find library -lc > ld.lld: error: unable to find library -lm > ld.lld: error: unable to find library -lclangrt.builtins-arm.a > clang-8: error: ld.lld command failed with exit code 1 (use -v to see > invocation) > > on the linking part. I downloaded a sysroot from > https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads/8-2-2018-08 > and tried to include it via --sysroot=/my/path/to/it, but clang acted > unimpressed with the same errors. So I'm missing clangrt.builtins-arm.a > I guess, but that does not exist on my system. > So next, I tried basically every version of "how to cross-compile > llvm/clang/compiler-rt" That google came up with, but was not able to > get a single one to actually work. Any ideas how to get this running? > Thanks in advance! _> ________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev > > _> ________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev > > _> ________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev > > >

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