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#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

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## Take all the options with the exception of --enable-install-req
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AC_PREREQ(2.59)
AC_INIT(FULL-PACKAGE-NAME, VERSION, BUG-REPORT-ADDRESS)
AC_CANONICAL_SYSTEM
AC_CONFIG_SRCDIR([src/main.cpp])
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AM_INIT_AUTOMAKE
AC_CONFIG_HEADER([src/config/config.h])
m4_ifdef([ACX_PTHREAD],,[m4_include([m4/acx_pthread.m4])])
m4_ifdef([ACX_MPI],,[m4_include([m4/acx_mpi.m4])])
m4_ifdef([AX_OPENMP],,[m4_include([m4/ax_openmp.m4])])
m4_ifdef([AX_CUDA],,[m4_include([m4/ax_cuda.m4])])
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m4_ifdef([IMMDX_LIB_METIS],,[m4_include([m4/immdx_lib_metis.m4])])
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m4_ifdef([AX_BOOST_BASE],,[m4_include([m4/ax_boost_base.m4])])
m4_ifdef([AX_BOOST_IOSTREAMS],,[m4_include([m4/ax_boost_iostreams.m4])])
m4_ifdef([AX_BOOST_PROGRAM_OPTIONS],,[m4_include([m4/ax_boost_program_options.m4])])
m4_ifdef([AX_BOOST_UNIT_TEST_FRAMEWORK],,[m4_include([m4/ax_boost_unit_test_framework.m4])])
m4_ifdef([AX_BLAS],,[m4_include([m4/ax_blas.m4])])
m4_ifdef([AX_LAPACK],,[m4_include([m4/ax_lapack.m4])])
m4_ifdef([AX_SUITESPARSE],,[m4_include([m4/ax_suitesparse.m4])])
m4_ifdef([AX_EIGEN],,[m4_include([m4/ax_eigen.m4])])

CXXFLAGS+=" --std=c++11 "
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NVCCFLAGS=" "
INCLUDES_PATH=" "

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# set default prefix
if test "$prefix" = "NONE"; then
   prefix="/usr/local"
fi

# Add openfpm_numerics to prefix forlder (if prefix end if openfpm_pdata remove that path)
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if [ echo "$prefix" | grep -qE "/openfpm_pdata$" ]; then
  prefix=$(echo "$prefix" | sed 's/\(.*\)\/openfpm_pdata$/\1/g')
fi

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prefix="$prefix/openfpm_numerics"
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echo "Installation dir is: $prefix"

# Checks for programs.
AC_PROG_CXX

# Checks g++ flags

AC_CANONICAL_HOST

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# Check that the compiler support mpi
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AC_LANG_PUSH([C++])
AC_CHECK_HEADER(mpi.h,[],[echo "mpi.h not found"
                          exit 200])
AC_LANG_POP([C++])
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# Check target architetture
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#AX_GCC_ARCHFLAG([], [CXXFLAGS="$CXXFLAGS $ax_cv_gcc_archflag"], [])
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###### Check for debug compilation

AC_MSG_CHECKING(whether to build with debug information)
debuger=no
AC_ARG_ENABLE(debug,
	AC_HELP_STRING(
	    [--enable-debug],
	    [enable debug data generation (def=no)]
	),
  	debuger="$enableval"
)



AC_MSG_RESULT($debuger)
if test x"$debuger" = x"yes"; then
	AC_DEFINE([DEBUG_MODE],[],[Debug])
	AC_DEFINE([DEBUG],[],[Debug])
	CXXFLAGS="$CXXFLAGS -g3  -Wall -O0 "
	NVCCFLAGS+="$NVCCFLAGS -g -O0 "
else
	CXXFLAGS="$CXXFLAGS -Wall -O3 -g3 -funroll-loops "
	NVCCFLAGS+="$NVCCFLAGS -O3 "
fi

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#########

## Check for Metis
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####### include openfpm_devices include path
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IMMDX_LIB_METIS([],[echo "Cannot detect metis, use the --with-metis option if it is not installed in the default location"
                    exit 201])

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####### include OpenFPM_numerics include path"
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INCLUDES_PATH+=" -I/usr/local/include -I. -Iconfig -I../../openfpm_devices/src -I../../openfpm_data/src -I../../openfpm_io/src -I../../openfpm_vcluster/src -I../../src"
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###### Check for se-class1
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AC_MSG_CHECKING(whether to build with security enhancement class1)
se_class1=no
AC_ARG_ENABLE(se-class1,
        AC_HELP_STRING(
            [--enable-se-class1],
            [enable security enhancement class1]
        ),
        se_class1="$enableval"
)



AC_MSG_RESULT($se_class1)
if test x"$se_class1" = x"yes"; then
        AC_DEFINE([SE_CLASS1],[],[Security enhancement class 1])
fi


###### Check for se-class 2

AC_MSG_CHECKING(whether to build with security enhancement class 2)
se_class2=no
AC_ARG_ENABLE(se-class2,
        AC_HELP_STRING(
            [--enable-se-class2],
            [enable security enhancement class 2]
        ),
        se_class2="$enableval"
)


AC_MSG_RESULT($se_class2)
if test x"$se_class2" = x"yes"; then
        AC_DEFINE([SE_CLASS2],[],[Security enhancement class 2])
fi

###### Check for se-class 3

AC_MSG_CHECKING(whether to build with security enhancement class 3)
se_class3=no
AC_ARG_ENABLE(se-class3,
        AC_HELP_STRING(
            [--enable-se-class3],
            [enable security enhancement class 3]
        ),
        se_class3="$enableval"
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)


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AC_MSG_RESULT($se_class3)
if test x"$se_class3" = x"yes"; then
        AC_DEFINE([SE_CLASS3],[],[Security enhancement class 3])
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fi

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###### Check for action on error
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action_on_e=continue
AC_ARG_WITH([action-on-error],
             AS_HELP_STRING([--with-action-on-error=stop,throw,continue],
             [specify the action to do in case of error]),
             [action_on_e="$withval"],
             [action_on_e=continue])

if test x"$action_on_e" = x"stop"; then
           AC_DEFINE([STOP_ON_ERROR],[],[If an error occur stop the program])
fi
if test x"$action_on_e" = x"throw"; then
           AC_DEFINE([THROW_ON_ERROR],[],[when an error accur continue but avoid unsafe operation])
fi
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##### CHECK FOR BOOST ##############

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AX_BOOST_BASE([1.52],[],[echo "boost not found"
                    exit 202])
AX_BOOST_UNIT_TEST_FRAMEWORK
AX_BOOST_PROGRAM_OPTIONS
AX_BOOST_IOSTREAMS

if test x"$ax_cv_boost_unit_test_framework" = x"no"; then
  echo "Notify boost not usable"
  exit 202
fi

if test x"$ax_cv_boost_iostreams" = x"no"; then
  echo "Notify boost not usable"
  exit 202
fi

if test x"$ax_cv_boost_programs_options" = x"no"; then
  echo "Notify boost not usable"
  exit 202
fi

### Unfortunately a lot of linux distros install a pretty old MPI in the system wide folder,
### override such MPI with the installed one is extremely difficult and tricky, because we want
### to include "some" system library but exclude mpi. One possibility is to give specifically
### the wanted libmpi.so directly to the linker. But this is not possible because this lib is
### given by mpic++ in the form -L/path/to/mpi -lmpi, the other is completely eliminate every
### -L with a system default library
###

# eliminate any /usr/lib and and /usr/include from $BOOST_LIB and $BOOST_INCLUDE

BOOST_LDFLAGS=$(echo "$BOOST_LDFLAGS" | sed -e 's/ -L\/usr\/lib64[ \b]//g' | sed -e 's/ -L\/usr\/lib[ \b]//g')
BOOST_CPPFLAGS=$(echo "$BOOST_CPPFLAGS" | sed -e 's/-I\/usr\/include[ \b]//g')

AC_SUBST(BOOST_LDFLAGS)
AC_SUBST(BOOST_CPPFLAGS)

###### Checking for OpenBLAS

AX_BLAS([],[echo "blas not found"
                    exit 204])

AX_LAPACK([],[echo "lapack not found"
                    exit 204])

###### Checking for SUITESPARSE

AX_SUITESPARSE([],[echo "suitesparse not found"
                    exit 205])

###### Checking for EIGEN

AX_EIGEN([],[echo "eigen not found"
                    exit 206])
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####### Checking for GPU support

AX_CUDA

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## detect for NVCC

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if test x"$NVCC_EXIST" = x"yes"; then
  AC_MSG_CHECKING(whether to build with GPU support)
  gpu_support=yes
  AC_ARG_ENABLE(gpu,
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	AC_HELP_STRING(
	    [--enable-gpu],
	    [enable gpu support]
	),
  	gpu_support="$enableval"
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  )

  AC_MSG_RESULT($gpu_support)
  if test x"$gpu_support" = x"yes"; then
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	AC_DEFINE([GPU],[],[GPU support])
  else
	CUDA_LIBS=""
	CUDA_CFLAGS=""
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  fi
else
  gpu_support=no
fi

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if test x$gpu_support = x"no"; then
     CUDA_LIBS=""
     CUDA_CFLAGS=""
fi
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# Set this conditional if cuda is wanted

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AM_CONDITIONAL(BUILDCUDA, test ! x$NVCC = x"no")

###########################
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# Define that there is MPI
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AC_DEFINE([HAVE_MPI],[],[MPI Enabled])
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AC_SUBST(NVCCFLAGS)
AC_SUBST(INCLUDES_PATH)

# Checks for typedefs, structures, and compiler characteristics.

# Checks for library functions.

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AC_CONFIG_FILES([Makefile src/Makefile ])
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AC_OUTPUT
echo ""
echo   "***********************************"
echo   "*                                 *"
if [ test x"$profiler" = x"yes" ]; then
  echo "*    profiler: yes                *"
else
  echo "*    profiler: no                 *"
fi
if [ test x"$memcheck" = x"yes" ]; then
  echo "*    memcheck: yes                *"
else
  echo "*    memcheck: no                 *"
fi
if [ test x"$debuger" = x"yes" ]; then
  echo "*    debug: yes                   *"
else
  echo "*    debug: no                    *"
fi
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if [ test x"$se_class1" = x"yes" ]; then
  echo "*    se-class1: yes               *"
else
  echo "*    se-class1: no                *"
fi
if [ test x"$se_class2" = x"yes" ]; then
  echo "*    se-class2: yes               *"
else
  echo "*    se-class2: no                *"
fi
if [ test x"$se_class3" = x"yes" ]; then
  echo "*    se-class3: yes               *"
else
  echo "*    se-class3: no                *"
fi
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if [ test x"$gpu_support" = x"no" ]; then
  echo "*    gpu: no                      *"
else
  echo "*    gpu: yes                     *"
fi
echo   "*                                 *"
echo   "***********************************"