Hi guys,

While trying to install Eigen 3.2.8 on Win 8.1 x64 I followed the instructions in the doc and wrote
at a win cmd prompt the following lines"

cd build_dir
cmake source_dir
make install

but I got some weird "Could not find..." errors like in here:
"
TurboX@ann123 MINGW64 /c/build_dir
$ cmake source_dir
-- Building for: Visual Studio 12 2013
-- The C compiler identification is MSVC 18.0.40629.0
-- The CXX compiler identification is MSVC 18.0.40629.0
-- Check for working C compiler using: Visual Studio 12 2013
-- Check for working C compiler using: Visual Studio 12 2013 -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler using: Visual Studio 12 2013
-- Check for working CXX compiler using: Visual Studio 12 2013 -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test standard_math_library_linked_to_automatically
-- Performing Test standard_math_library_linked_to_automatically - Success
-- Standard libraries to link to explicitly: none
-- Performing Test COMPILER_SUPPORT_OPENMP
-- Performing Test COMPILER_SUPPORT_OPENMP - Success
-- Looking for Q_WS_X11
-- Looking for Q_WS_X11 - not found
-- Looking for Q_WS_WIN
-- Looking for Q_WS_WIN - found
-- Looking for Q_WS_QWS
-- Looking for Q_WS_QWS - not found
-- Looking for Q_WS_MAC
-- Looking for Q_WS_MAC - not found
-- Found Qt4: C:/Users/TurboX/Anaconda3/Library/bin/qmake.exe (found version "4. 8.7")
-- C:/build_dir/test
-- Could NOT find CHOLMOD (missing: CHOLMOD_INCLUDES CHOLMOD_LIBRARIES)
-- Could NOT find UMFPACK (missing: UMFPACK_INCLUDES UMFPACK_LIBRARIES)
-- Could NOT find SUPERLU (missing: SUPERLU_INCLUDES SUPERLU_LIBRARIES)
-- Could NOT find PASTIX (missing: PASTIX_INCLUDES PASTIX_LIBRARIES)
-- Could NOT find SCOTCH (missing: SCOTCH_INCLUDES SCOTCH_LIBRARIES)
-- Could NOT find METIS (missing: METIS_INCLUDES METIS_LIBRARIES)
-- Could NOT find SPQR (missing: SPQR_INCLUDES SPQR_LIBRARIES)
-- The Fortran compiler identification is unknown
CMake Warning at blas/CMakeLists.txt:32 (message):
No fortran compiler has been detected, the blas build will be incomplete.


-- Could NOT find GOOGLEHASH (missing: GOOGLEHASH_INCLUDES GOOGLEHASH_COMPILE)
-- Could NOT find ADOLC (missing: ADOLC_INCLUDES ADOLC_LIBRARIES)
-- Could NOT find MPFR (missing: MPFR_INCLUDES MPFR_LIBRARIES MPFR_VERSION_OK) (Required is at least version "2.3.0")
-- Could NOT find GMP (missing: GMP_INCLUDES GMP_LIBRARIES)
-- Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
-- Could NOT find FFTW (missing: FFTW_INCLUDES FFTW_LIBRARIES)
-- Found OpenGL: opengl32
-- Could NOT find GLUT (missing: GLUT_glut_LIBRARY GLUT_INCLUDE_DIR)
-- Found Qt4: C:/Users/TurboX/Anaconda3/Library/bin/qmake.exe (found version "4. 8.7")
-- ************************************************************
-- *** Eigen's unit tests configuration summary ***
-- ************************************************************
--
-- Build type: Release
-- Build site: ann123
-- Build string: unknownwin-na-32bit
-- Enabled backends: Qt4 support,
-- Disabled backends: Cholmod, UmfPack, SuperLU, PaStiX, METIS, GoogleHash, Adolc, MPFR C++, fftw, OpenGL,
-- Default order: Column-major
-- Maximal matrix/vector size: 320
-- SSE2: Using architecture defaults
-- SSE3: Using architecture defaults
-- SSSE3: Using architecture defaults
-- SSE4.1: Using architecture defaults
-- SSE4.2: Using architecture defaults
-- Altivec: Using architecture defaults
-- ARM NEON: Using architecture defaults
--
CXX: C:/Program Files (x86)/Microsoft Visual Studio 12.0/VC/bin/cl .exe
CXX_FLAGS: /DWIN32 /D_WINDOWS /W4 /GR /EHsc /EHsc /wd4127 /wd4505 /wd4 714 /D_CRT_SECURE_NO_WARNINGS /D_SCL_SECURE_NO_WARNINGS
Sparse lib flags:

-- ************************************************************
--
-- Configured Eigen 3.2.8
--
-- To build/run the unit tests, read this page:
-- http://eigen.tuxfamily.org/index.php?title=Tests
--
-- Configuring done
-- Generating done
-- Build files have been written to: C:/build_dir

TurboX@ann123 MINGW64 /c/build_dir
$ make install
bash: make: command not found

TurboX@ann123 MINGW64 /c/build_dir
$
"

Apparently this installation is suspect to say the least so I need a helping hand in order
to make a proper installation ?

Thank you.
MD

Eigen is header only, so if all you want is using Eigen, then simply copy Eigen/ wherever you want.

The CMake stuff is mostly to compile/run/generate unit tests and docs. Since you configured cmake for visual, you need to use visual's tools to build/install through the generated build directory, not GNU make: https://cognitivewaves.wordpress.com/cm ... al-studio/