Build fails immediately

[vanjoe]

Hi, I tried to follow the instructions in the readme, and I got the frollowing error:

joel:/nfs/scratch/joel 
 $ git clone -b RISCV https://github.com/riscv/riscv-llvm.git
Cloning into 'riscv-llvm'...
remote: Counting objects: 1057149, done.
remote: Total 1057149 (delta 0), reused 0 (delta 0), pack-reused 1057149
Receiving objects: 100% (1057149/1057149), 206.89 MiB | 1.41 MiB/s, done.
Resolving deltas: 100% (866268/866268), done.
Checking connectivity... done.
Checking out files: 100% (11855/11855), done.
joel:/nfs/scratch/joel 
 $ cd riscv-llvm/
joel:/nfs/scratch/joel/riscv-llvm (RISCV)
 $ git submodule update --init --recursive 
Submodule 'riscv-clang' (https://github.com/riscv/riscv-clang.git) registered for path 'riscv-clang'
Cloning into 'riscv-clang'...
remote: Counting objects: 543424, done.
remote: Total 543424 (delta 0), reused 0 (delta 0), pack-reused 543424
Receiving objects: 100% (543424/543424), 102.46 MiB | 1.52 MiB/s, done.
Resolving deltas: 100% (456062/456062), done.
Checking connectivity... done.
Submodule path 'riscv-clang': checked out '5ca597d912b945857b457674db7ca80370eb9a7c'
joel:/nfs/scratch/joel/riscv-llvm (RISCV)
 $ mkdir build
joel:/nfs/scratch/joel/riscv-llvm (RISCV)
 $ cd build
joel:/nfs/scratch/joel/riscv-llvm/build (RISCV)
 $ cmake -DCMAKE_INSTALL_PREFIX=/nfs/scratch/joel/riscv-llvm/install -DLLVM_TARGETS_TO_BUILD="RISCV" ../
-- The C compiler identification is GNU 4.8.4
-- The CXX compiler identification is GNU 4.8.4
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
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!
See also "/nfs/scratch/joel/riscv-llvm/build/CMakeFiles/CMakeOutput.log".

[comododragon]

I had the same problem. It appears that the commands in the README are wrong. The git clone command points to the RISCV branch, whereas the README is for the riscv-trunk branch. Use this instead:

git clone -b riscv-trunk https://github.com/riscv/riscv-llvm.git

[colinschmidt]

Yes the only supported branch is currently riscv-trunk.

[Git-Hub-2016]

riscv-trunk does not work either! There is something wrong with the content and/or location of CMakeLists.txt

[Git-Hub-2016]

Here is the result:
CMake Error at CMakeLists.txt:116 (include):
include could not find load file:

VersionFromVCS

CMake Error at /usr/share/cmake-3.5/Modules/CPack.cmake:423 (message):
CPack license resource file:
"/home/llvm/FPGA/Original/riscv-llvm/install/LICENSE.TXT" could
not be found.
Call Stack (most recent call first):
/usr/share/cmake-3.5/Modules/CPack.cmake:428 (cpack_check_file_exists)
CMakeLists.txt:156 (include)

CMake Error at CMakeLists.txt:282 (include):
include could not find load file:

AddLLVMDefinitions

CMake Error at CMakeLists.txt:466 (include):
include could not find load file:

config-ix

CMake Error at CMakeLists.txt:468 (string):
string sub-command REPLACE requires at least four arguments.

CMake Error at CMakeLists.txt:478 (include):
include could not find load file:

HandleLLVMOptions

CMake Error at CMakeLists.txt:544 (message):
Unexpected failure executing llvm-build: /usr/bin/python2.7: can't open
file
'/home/llvm/FPGA/Original/riscv-llvm/install/utils/llvm-build/llvm-build':
[Errno 2] No such file or directory
-- Constructing LLVMBuild project information
-- Configuring incomplete, errors occurred!
See also "/home/llvm/FPGA/Original/riscv-llvm/CMakeFiles/CMakeOutput.log".

[colinschmidt]

It looks like you don't have python installed

"Unexpected failure executing llvm-build: /usr/bin/python2.7: can't open
file"