[llvm-dev] libunwind build errors on aarch64 during LLVM/Clang installation

[via llvm-dev]

I try to build LLVM/Clang 3.8.1 on Tegra X1 (aarch64) and libunwind is needed. Compilation failed when try to build libunwind with the following compilation errors: 

[ 51%] Building C object 
projects/libunwind/src/CMakeFiles/unwind.dir/UnwindRegistersRestore.S.o 
/mnt/SD/hipacc/tar_llvm/llvm-3.8.1.src/projects/libunwind/src/UnwindRegistersRestore.S:270:74: 
warning: invoking macro GLUE2 argument 1: empty macro arguments are 
undefined in ISO C90 and ISO C++98 [enabled by default] 
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv) 
^ 
/mnt/SD/hipacc/tar_llvm/llvm-3.8.1.src/projects/libunwind/src/UnwindRegistersRestore.S:270:74: 
warning: invoking macro GLUE2 argument 1: empty macro arguments are 
undefined in ISO C90 and ISO C++98 [enabled by default] 
/mnt/SD/hipacc/tar_llvm/llvm-3.8.1.src/projects/libunwind/src/UnwindRegistersRestore.S:270:74: 
warning: invoking macro GLUE2 argument 1: empty macro arguments are 
undefined in ISO C90 and ISO C++98 [enabled by default] 
/mnt/SD/hipacc/tar_llvm/llvm-3.8.1.src/projects/libunwind/src/UnwindRegistersRestore.S:270:74: 
warning: invoking macro GLUE2 argument 1: empty macro arguments are 
undefined in ISO C90 and ISO C++98 [enabled by default] 
/mnt/SD/hipacc/tar_llvm/llvm-3.8.1.src/projects/libunwind/src/UnwindRegistersRestore.S: 
Assembler messages: 
/mnt/SD/hipacc/tar_llvm/llvm-3.8.1.src/projects/libunwind/src/UnwindRegistersRestore.S:285: 
Error: operand 2 should be an integer register -- `ldp x28,fp,[x0,#0x0E0]' 
/mnt/SD/hipacc/tar_llvm/llvm-3.8.1.src/projects/libunwind/src/UnwindRegistersRestore.S:286: 
Error: operand 1 should be an integer register -- `ldr lr,[x0,#0x100]' 
/mnt/SD/hipacc/tar_llvm/llvm-3.8.1.src/projects/libunwind/src/UnwindRegistersRestore.S:309: 
Error: operand 1 should be an integer register -- `ret lr' 
projects/libunwind/src/CMakeFiles/unwind.dir/build.make:182: recipe for 
target 
'projects/libunwind/src/CMakeFiles/unwind.dir/UnwindRegistersRestore.S.o' 
failed 
make[2]: *** 
[projects/libunwind/src/CMakeFiles/unwind.dir/UnwindRegistersRestore.S.o] 
Error 1 
CMakeFiles/Makefile2:12542: recipe for target 
'projects/libunwind/src/CMakeFiles/unwind.dir/all' failed 
make[1]: *** [projects/libunwind/src/CMakeFiles/unwind.dir/all] Error 2 
Makefile:149: recipe for target 'all' failed 
make: *** [all] Error 2 

Os: Ubuntu 16.04, gcc/g++ : 4.8 


I already installed this same clang version on two PC x86, Ubuntu OS, gcc / g ++ 4.8 without any problems. I can't find any information on internet. I hope you can help me with this 
problem. 
Thanks. 
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