Cmake Error: The following variables are used in the project, but they are set to NOTFOUND trying to compile Rigs of Rods in archlinux

I’ve been trying to compile Rigs of Rods under archlinux with 4.2.6 Kernel. I’ve followed the official compiling instructions presented in http://www.rigsofrods.com/wiki/pages/Compiling_Sources_under_Linux I have succesfully compiled ogredeps and CMake gave me no error, I even enabled multithreading for it (while using make, after running CMake .), but when I try to compile Ogre (Mentioned under the “Ogre Itself” section in compiling instructions) CMake gives me this:

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
OIS_INCLUDE_DIR (ADVANCED)
   used as include directory in directory /root/ror-deps/ogre/Samples
   used as include directory in directory /root/ror-deps/ogre/Samples
   used as include directory in directory /root/ror-deps/ogre/Samples
   used as include directory in directory /root/ror-deps/ogre/Samples
   used as include directory in directory /root/ror-deps/ogre/Samples
   used as include directory in directory /root/ror-deps/ogre/Samples
   used as include directory in directory /root/ror-deps/ogre/Samples
   used as include directory in directory /root/ror-deps/ogre/Samples

Also here is the output of /root/ror-deps/ogre/CMakeFiles/CMakeError.log:

Determining if the system is big endian passed with the following output:
Change Dir: /root/ror-deps/ogre/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_4b356/fast"
/usr/bin/make -f CMakeFiles/cmTC_4b356.dir/build.make CMakeFiles/cmTC_4b356.dir/build
make[1]: se entra en el directorio '/root/ror-deps/ogre/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_4b356.dir/TestEndianess.c.o
/usr/bin/cc     -o CMakeFiles/cmTC_4b356.dir/TestEndianess.c.o   -c /root/ror-deps/ogre/CMakeFiles/CMakeTmp/TestEndianess.c
Linking C executable cmTC_4b356
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_4b356.dir/link.txt  --verbose=1
/usr/bin/cc       CMakeFiles/cmTC_4b356.dir/TestEndianess.c.o  -o cmTC_4b356 -rdynamic 
 make[1]: se sale del directorio '/root/ror-deps/ogre/CMakeFiles/CMakeTmp'

TestEndianess.c:
/* A 16 bit integer is required. */
typedef unsigned short cmakeint16;

/* On a little endian machine, these 16bit ints will give "THIS IS LITTLE ENDIAN."
   On a big endian machine the characters will be exchanged pairwise. */
 const cmakeint16 info_little[] =  {0x4854, 0x5349, 0x4920, 0x2053, 0x494c, 0x5454, 0x454c, 0x4520, 0x444e, 0x4149, 0x2e4e, 0x0000};

/* on a big endian machine, these 16bit ints will give "THIS IS BIG ENDIAN."
   On a little endian machine the characters will be exchanged pairwise. */
const cmakeint16 info_big[] =     {0x5448, 0x4953, 0x2049, 0x5320, 0x4249, 0x4720, 0x454e, 0x4449, 0x414e, 0x2e2e, 0x0000};

#ifdef __CLASSIC_C__
int main(argc, argv) int argc; char *argv[];
#else
int main(int argc, char *argv[])
#endif
{
  int require = 0;
  require += info_little[argc];
  require += info_big[argc];
  (void)argv;
  return require;
}

I’ve researched, I’ve taken a look at these questions:

–CMake Error: The following variables are used in this project, but they are set to NOTFOUND –CMake Error: The following variables are used in this project, but they are set to NOTFOUND –CMake Error: The following variables are used in this project, but they are set to NOTFOUND ? in ros

but either they refer to different issues or simply I can’t understand the answers well

Answer

OIS_INCLUDE_DIR means that the includes (header files) of OIS are not found. Either your distribution has a package which you have to install or you have to add the OIS install directory to the CMAKE_PREFIX_PATH.