On 28.12.2017 20:31, Don Hinton wrote:
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
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@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.
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