I hope I am posting this question in the right place.
Knowing that rvv intrinsics support is pushed to LVV upstream. I am eager to try it out.
But it seems I could not get libc set up correctly.
If I configured LLVM compilation with:
cmake -G “Unix Makefiles” -DLLVM_ENABLE_PROJECTS=“clang;libcxx;libcxxabi” -DCMAKE_BUILD_TYPE=“Release” -DLLVM_BUILD_TESTS=False -DLLVM_TARGETS_TO_BUILD=“RISCV” -DCMAKE_INSTALL_PREFIX=$RISCV …/llvm && make -j16
I got compilation errors as attached at the end of this email.
The compilation would succeed if I omit libcxx libcxxabi from LLVM_ENABLE_PROJECTS. But it seems clang would not find assert.h:
clang -static --target=riscv32 -menable-experimental-extensions -march=rv32imv0p10 -mabi=ilp32 -g -O2 -Wall -fPIC -I…/…/include -std=c11 -c -o …/…/sep/test.o …/…/sep/test.c
…/…/sep/test.c:4:10: fatal error: ‘stdio.h’ file not found
#include <stdio.h>
^~~~~~~~~
Attached compilation error for libcxx:
In file included from $HOME/riscv/llvm-project/build/include/c++/v1/exception:84:0,
from $HOME/riscv/llvm-project/libcxxabi/src/cxa_default_handlers.cpp:11:
$HOME/riscv/llvm-project/build/include/c++/v1/type_traits: In substitution of ‘template<class … _Args> using _SecondType = typename std::__1::_MetaBase<(sizeof… (_Args) >= 2)>::_SecondImpl<_Args …> [with _Args = {_Tp …, _Dep}]’:
$HOME/riscv/llvm-project/build/include/c++/v1/tuple:1000:51: required from here
$HOME/riscv/llvm-project/build/include/c++/v1/type_traits:501:117: error: pack expansion argument for non-pack parameter ‘’ of alias template ‘template<class, class _Second, class …> using _SecondImpl = _Second’
using _SecondType _LIBCPP_NODEBUG_TYPE = typename _MetaBase<(sizeof…(_Args) >= 2)>::template _SecondImpl<_Args…>;
^
In file included from $HOME/riscv/llvm-project/build/include/c++/v1/exception:84:0,
from $HOME/riscv/llvm-project/libcxxabi/src/cxa_default_handlers.cpp:11:
$HOME/riscv/llvm-project/build/include/c++/v1/type_traits:473:13: note: declared here
template <class, class _Second, class…>
^
In file included from $HOME/riscv/llvm-project/build/include/c++/v1/memory:678:0,
from $HOME/riscv/llvm-project/libcxxabi/src/include/atomic_support.h:17,
from $HOME/riscv/llvm-project/libcxxabi/src/cxa_default_handlers.cpp:18:
$HOME/riscv/llvm-project/build/include/c++/v1/tuple:1000:66: error: template argument 1 is invalid
is_assignable<_SecondType<_Tp…, _Dep>&, _Up2 const&>
^
$HOME/riscv/llvm-project/build/include/c++/v1/tuple:1001:9: error: template argument 4 is invalid
::value
^
$HOME/riscv/llvm-project/build/include/c++/v1/tuple:1002:9: error: template argument 1 is invalid
,int> = 0>
^
$HOME/riscv/llvm-project/build/include/c++/v1/tuple:1019:59: error: template argument 1 is invalid
is_assignable<_SecondType<_Tp…, _Dep>&, _Up2>
^
$HOME/riscv/llvm-project/build/include/c++/v1/tuple:1020:9: error: template argument 4 is invalid
::value
^
$HOME/riscv/llvm-project/build/include/c++/v1/tuple:1021:9: error: template argument 1 is invalid
,int> = 0>
^
projects/libcxxabi/src/CMakeFiles/cxxabi_shared.dir/build.make:95: recipe for target ‘projects/libcxxabi/src/CMakeFiles/cxxabi_shared.dir/cxa_default_handlers.cpp.o’ failed
make[2]: *** [projects/libcxxabi/src/CMakeFiles/cxxabi_shared.dir/cxa_default_handlers.cpp.o] Error 1
CMakeFiles/Makefile2:19706: recipe for target ‘projects/libcxxabi/src/CMakeFiles/cxxabi_shared.dir/all’ failed
make[1]: *** [projects/libcxxabi/src/CMakeFiles/cxxabi_shared.dir/all] Error 2