Looks like AVR is experimental, so you'll need to pass it via -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="AVR"
As for the correct --target, you can take a look at the logic in llvm/cmake/config.guess to get an idea on how to construct one. hth... don On Wed, Dec 13, 2017 at 2:15 AM, via cfe-users <cfe-users@lists.llvm.org> wrote: > Hi, I am new to llvm, so my first question is if this is the right > mailing list to address respective problems using that software. > > I downloaded the llvm 5.0.0 binary bundle, and I can compile simple > main.c for x64_64 host. However, when > > .../bin/clang main.c --target=avr > error: unable to create target: 'No available targets are compatible with > this triple.' > 1 error generated. > > As --help is not much help, I tried guessing around using targets > elf32-avr, avr-unknown-none, all giving the same, unspecific diagnostic > (so much for "extremely useful error and warning messages"). > > https://clang.llvm.org/docs/CrossCompilation.html > > claims: > > > On the other hand, Clang/LLVM is natively a cross-compiler, meaning > > that one set of programs can compile to all targets by setting the > > -target option. > > I checked the v5.0 sources, there are plenty of modules dealing with > AVR, so that target should be supported. No? > > So I downloaded the llvm 5.0.0 source bundle and configured for AVR: > > $ cmake -G "Unix Makefiles" -DLLVM_TARGETS_TO_BUILD="AVR" > ../../source/llvm-5.0.0.src/ > > But: > > -- Constructing LLVMBuild project information > CMake Error at CMakeLists.txt:688 (message): > The target `AVR' does not exist. > > It should be one of > > > AArch64;AMDGPU;ARM;BPF;Hexagon;Lanai;Mips;MSP430;NVPTX; > PowerPC;Sparc;SystemZ;X86;XCore > > -- Configuring incomplete, errors occurred! > See also ".../build/llvm-5-avr/CMakeFiles/CMakeOutput.log". > See also ".../build/llvm-5-avr/CMakeFiles/CMakeError.log". > > The 5.0.0 release notes have some mention of AVR > > http://releases.llvm.org/5.0.0/docs/ReleaseNotes.html#change > s-to-the-avr-target > > so I'd expect this target is supported? > > Thanks for any help. > > _______________________________________________ > cfe-users mailing list > cfe-users@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users >
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