[gmx-users] Set the environment variables of "FFTW3_INCLUDE_DIR" and "FFTW3_LIBRARIES"

[Hassan Aaryapour]

Dear Gmx-user;
I want to install double precision gromacs 4.5.3 and FFTW 3.3.2 in my
home directory.
first, according to the FFTW installation instructions I installed and
introduced it to bash shell it as the following order:

$tar -xzvf fftw-3.3.2.tar.gz
$./configure --enable-threads --prefix=/home/WeNMR/ProgramFiles/fftw
$make
$make install

export CPPFLAGS=-I/home/WeNMR/ProgramFiles/fftw/include
export LDFLAGS=-L/home/WeNMR/ProgramFiles/fftw/lib

but it isn't found automatically by cmake when I want to install gromacs.
and this error was appeared:

 CMake Error at
/usr/local/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:108
(message):
   Could not find FFTW3.  Provide the fftw3 install directory in the
   FFTW3_ROOT_DIR environment variable.  (missing: FFTW3_LIBRARIES
   FFTW3_INCLUDE_DIR)
 Call Stack (most recent call first):
   /usr/local/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:315
(_FPHSA_FAILURE_MESSAGE)
   cmake/FindFFTW3.cmake:31 (find_package_handle_standard_args)
   CMakeLists.txt:636 (find_package)


How can I set the environment variables for "FFTW3_INCLUDE_DIR" and
"FFTW3_LIBRARIES"?
can I add my FFTW installed path to "CMakeLists.txt" file in the
related section in below? how?

if(${GMX_FFT_LIBRARY} STREQUAL "FFTW3")
#    MESSAGE(STATUS "Using external FFT library - fftw3")
    if(GMX_DOUBLE)
        find_package(FFTW3 REQUIRED)
		include_directories(${FFTW3_INCLUDE_DIR})
        set(FFT_LIBRARIES ${FFTW3_LIBRARIES})
        set(PKG_FFT "fftw3")
    else(GMX_DOUBLE)
        find_package(FFTW3F REQUIRED)
        include_directories(${FFTW3F_INCLUDE_DIR})
        set(FFT_LIBRARIES ${FFTW3F_LIBRARIES})
        set(PKG_FFT "fftw3f")
    endif(GMX_DOUBLE)


Thank you in advance
Hassan