[cfe-users] Problem compiling simple main.c with llvm-5.0
Georg-Johann Lay via cfe-users
cfe-users at lists.llvm.org
Mon Jan 8 08:13:18 PST 2018
On 28.12.2017 20:31, Don Hinton wrote:
> Looks like AVR is experimental, so you'll need to pass it via
> 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.
Ok, thanks for your information.
As it didn't appear to work, I just returned to GCC for now.
Thanks for your help.
> On Wed, Dec 13, 2017 at 2:15 AM, via cfe-users <cfe-users at lists.llvm.org>
>> 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").
>>> 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"
>> -- Constructing LLVMBuild project information
>> CMake Error at CMakeLists.txt:688 (message):
>> The target `AVR' does not exist.
>> It should be one of
>> -- 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
>> so I'd expect this target is supported?
>> Thanks for any help.
>> cfe-users mailing list
>> cfe-users at lists.llvm.org
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