cmake: Selecting a generator within CMakeLists.txt

Question

I would like to force CMake to use the \"Unix Makefiles\" generator from within CMakeLists.txt.

This is the command I use n

Answer 1

This is not what I get, when I run the same command, cmake will look for a gcc compiler / make utility. If the PATH is not set up correctly it will fail with something like:

D:\Development\build>cmake -G "Unix Makefiles" ..\source
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:D:/Development/build/CMakeFiles/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:D:/Development/build/CMakeFiles/CMakeCXXCompiler.cmake
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!

when gcc / mingw is in the path then everything works fine. So could you provide more information as to your PATH variable or CMAKE version?