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= Installation =
<<TableOfContents(2)>>

== System requirements ==
In principle, BDF support all Unix-like platforms. However, we strongly propose you to use BDF at Linux platform together Intel Fortran and C compiler because BDF package is developed and thoroughly tested on such platforms. System requirements of BDF is summarized as following lines:

 * OS: Linux, Mac, FreeBSD, Unix
 * Compiler: Fortran 90 compiler such as Intel, gfortran, g95
 * Support softwares: Python, make
 * Parallel environments: MPI

== Configure and compile BDF package ==
Several steps are needed to install BDF package.

 1. Set fortran and C compiler.
  
  . $export FC=ifort
  . $export CC=gcc

  . Tips: If you ignored this step, the configure script will pick up the gfortran and gcc compiler as default.

 2. Set blas and lapack library.
  . For flaxibality reason, we ask users to set blas and lapack libraries.
  . $export MATHLIB="-LMathLibDir -llapackname -lblasname"

 3. Configure BDF package.
  
  After setting compiler and mathematic library. You can configure BDF by command configure in BDF root directory.
    . $configure

  Configure support several parameters.
   . --enable-debug=yes[no]   Compile BDF in debug mode.
   . --enable-i8=yes[no]      Compile BDF with 64 bit integrals.
   . --enable-openmp=yes[no]  Compile BDF with OpenMP supporting.

 4. Make
  . $make 

 5. Some typical installation

  * A 64bit machine with intel compiler and MKL library.
   . $export FC=ifort
   . $export CC=gcc
   . $export MATHILIB="-L/opt/intel -lmkl -lguide"
   . $./configure --enabale-i8=yes --enable-openmp=yes
   . $make
  

  * A Mac laptop with gfortran, gcc and user compiled lapack and blas library 
   . $export FC=gfortran 
   . $export CC=gcc $export MATHILIB="-L/Users/mike/mathlib -lblas -llapack" 
   . $./configure --enabale-i8=yes --enable-openmp=yes 
   . $make

== Set system variables of BDF package ==