LLVM build failed

[nitish2112]

When I build using Cmake, I get these erorrs:

% mkdir build
% cd build
% cmake -DCMAKE_INSTALL_PREFIX=/opt/riscv -DLLVM_TARGETS_TO_BUILD="RISCV" ../

CMake Error at CMakeLists.txt:143 (message):
The target `RISCV' does not exist.
It should be one of
AArch64;ARM;CppBackend;Hexagon;Mips;MBlaze;MSP430;NVPTX;PowerPC;Sparc;SystemZ;X86;XCore
-- Configuring incomplete, errors occurred!

[sorear]

dup of #36