basic question about building ldc/calypso from source

[Laeeth Isharc via digitalmars-d-ldc]

Hi.

I am struggling with using cmake to build LDC.  I have 
successfully built LLVM and clang following standard 
instructions, but I am not so familiar with cmake and do not know 
which directory LLVM_ROOT_DIR should point to.

Ultimately I would like to build calypso, but I have the same 
problem with stock LDC.

Running arch linux on a 64 bit machine.  I have tried various 
iterations of pointing to build directory as well as llvm parent.

[laeeth at console build]$ cmake .. -DLLVM_ROOT_DIR='../../llvm' 
-DCMAKE_BUILD_TYPE=Release

[laeeth at console build]$ ls ../../llvm/
autoconf	 configure    LLVMBuild.txt	  README.txt
bin		 CREDITS.TXT  llvm.spec.in	  test
bindings	 docs	      Makefile		  tools
build		 examples     Makefile.common	  unittests
cmake		 include      Makefile.config.in  utils
CMakeLists.txt	 lib	      Makefile.rules
CODE_OWNERS.TXT  LICENSE.TXT  projects
[laeeth at console build]$


This is the error I receive:

[laeeth at console build]$ cmake .. -DLLVM_ROOT_DIR='../../llvm' 
-DCMAKE_BUILD_TYPE=Release
CMake Error at cmake/Modules/FindLLVM.cmake:140 (string):
   string sub-command REGEX, mode MATCHALL needs at least 5 
arguments total to
   command.
Call Stack (most recent call first):
   cmake/Modules/FindLLVM.cmake:174 (llvm_set_libs)
   CMakeLists.txt:18 (find_package)


CMake Error at 
/usr/share/cmake-3.1/Modules/FindPackageHandleStandardArgs.cmake:138 
(message):
   Could NOT find LLVM: Found unsuitable version "", but required 
is at least
   "3.1" (found )
Call Stack (most recent call first):
   
/usr/share/cmake-3.1/Modules/FindPackageHandleStandardArgs.cmake:372 
(_FPHSA_FAILURE_MESSAGE)
   cmake/Modules/FindLLVM.cmake:196 
(find_package_handle_standard_args)
   CMakeLists.txt:18 (find_package)


-- Configuring incomplete, errors occurred!
See also 
"/btrfs0/dlang/calypso/calypso/build/CMakeFiles/CMakeOutput.log".