.../Clang No such file or directory

[omerguzelelectronicguy]

Hello,
I am using Ubuntu 20.04. I applied all the steps in this readme.riscv-linux.
At this line I am having such an error:

omerguzel@omerguzel-HP-Pro:~/Projects/pocl_example/riscv-gnu-toolchain/build/llvm/build$ $RISCV_TOOLCHAIN_PATH/clang hello.c
bash: /home/omerguzel/Projects/pocl_example/riscv-gnu-toolchain/build/../drops/clang: No such file or directory

Why does this happen? did I make a mistake during the building?

When I change it to this

omerguzel@omerguzel-HP-Pro:~/Projects/pocl_example/riscv-gnu-toolchain/build/llvm/build$ clang hello.c
hello.c:1:10: fatal error: 'stdio.h' file not found
#include <stdio.h>
         ^~~~~~~~~
1 error generated.

It gives such an error. Could you help me with that, please?

Edit: I used the last version of the llvm because the version 10.x caused such an error:

0  lib/libLLVMBinaryFormat.so.10  lib/libLLVMSupport.so.10  -Wl,-rpath-link,/home/omerguzel/Projects/pocl_example/riscv-gnu-toolchain/build/llvm/build/lib && :
/usr/bin/ld: lib/Object/CMakeFiles/LLVMObject.dir/ArchiveWriter.cpp.o: in function `llvm::writeArchive(llvm::StringRef, llvm::ArrayRef<llvm::NewArchiveMember>, bool, llvm::object::Archive::Kind, bool, bool, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer> >)':
ArchiveWriter.cpp:(.text._ZN4llvm12writeArchiveENS_9StringRefENS_8ArrayRefINS_16NewArchiveMemberEEEbNS_6object7Archive4KindEbbSt10unique_ptrINS_12MemoryBufferESt14default_deleteIS8_EE+0x1ab6): undefined reference to `llvm::raw_string_ostream::current_pos() const'
/usr/bin/ld: ArchiveWriter.cpp:(.text._ZN4llvm12writeArchiveENS_9StringRefENS_8ArrayRefINS_16NewArchiveMemberEEEbNS_6object7Archive4KindEbbSt10unique_ptrINS_12MemoryBufferESt14default_deleteIS8_EE+0x1ae9): undefined reference to `llvm::raw_string_ostream::current_pos() const'
/usr/bin/ld: ArchiveWriter.cpp:(.text._ZN4llvm12writeArchiveENS_9StringRefENS_8ArrayRefINS_16NewArchiveMemberEEEbNS_6object7Archive4KindEbbSt10unique_ptrINS_12MemoryBufferESt14default_deleteIS8_EE+0x1b16): undefined reference to `llvm::raw_string_ostream::current_pos() const'
/usr/bin/ld: ArchiveWriter.cpp:(.text._ZN4llvm12writeArchiveENS_9StringRefENS_8ArrayRefINS_16NewArchiveMemberEEEbNS_6object7Archive4KindEbbSt10unique_ptrINS_12MemoryBufferESt14default_deleteIS8_EE+0x1b41): undefined reference to `llvm::raw_string_ostream::current_pos() const'
/usr/bin/ld: ArchiveWriter.cpp:(.text._ZN4llvm12writeArchiveENS_9StringRefENS_8ArrayRefINS_16NewArchiveMemberEEEbNS_6object7Archive4KindEbbSt10unique_ptrINS_12MemoryBufferESt14default_deleteIS8_EE+0x1b6e): undefined reference to `llvm::raw_string_ostream::current_pos() const'
/usr/bin/ld: lib/Object/CMakeFiles/LLVMObject.dir/ArchiveWriter.cpp.o:ArchiveWriter.cpp:(.text._ZN4llvm12writeArchiveENS_9StringRefENS_8ArrayRefINS_16NewArchiveMemberEEEbNS_6object7Archive4KindEbbSt10unique_ptrINS_12MemoryBufferESt14default_deleteIS8_EE+0x1bad): more undefined references to `llvm::raw_string_ostream::current_pos() const' follow
collect2: error: ld returned 1 exit status
[1478/2985] Building CXX object lib/Passes/CMakeFiles/LLVMPasses.dir/PassBuilder.cpp.o
ninja: build stopped: subcommand failed.