Trying to build minetest

  # apt-get install build-essential libirrlicht-dev cmake libbz2-dev libpng12-dev libjpeg8-dev libxxf86vm-dev libgl1-mesa-dev libsqlite3-dev libogg-dev libvorbis-dev libopenal-dev libcurl4-gnutls-dev libfreetype6-dev

  # apk add cmake irrlicht-dev libbz2 libpng-dev libjpeg-turbo-dev libxxf86vm-dev mesa-gl mesa-dev sqlite-dev libogg-dev libvorbis-dev openal-soft-dev gnutls-dev freetype-dev

$ cmake . -DRUN_IN_PLACE=1
CMake Error: CMake was unable to find a build program corresponding to "Unix Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_C_COMPILER_ENV_VAR
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_C_COMPILER
CMake Error: Could not find cmake module file: /home/martin/building/minetest/CMakeFiles/3.1.0/CMakeCCompiler.cmake
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_CXX_COMPILER_ENV_VAR
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_CXX_COMPILER
CMake Error: Could not find cmake module file: /home/martin/building/minetest/CMakeFiles/3.1.0/CMakeCXXCompiler.cmake
CMake Error at CMakeLists.txt:8 (project):
  No CMAKE_C_COMPILER could be found.
 
  Tell CMake where to find the compiler by setting the CMake cache entry
  CMAKE_C_COMPILER to the full path to the compiler, or to the compiler name
  if it is in the PATH.
 
CMake Error at CMakeLists.txt:8 (project):
  No CMAKE_CXX_COMPILER could be found.
 
  Tell CMake where to find the compiler by setting the CMake cache entry
  CMAKE_CXX_COMPILER to the full path to the compiler, or to the compiler
  name if it is in the PATH.
 
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!