configure.ac

AC_PREREQ([2.69])

AC_INIT([elpa],[2015.02.002], [elpa-library@rzg.mpg.de])
AC_SUBST([PACKAGE_VERSION])

AC_CONFIG_SRCDIR([src/elpa1.F90])

AM_INIT_AUTOMAKE([foreign -Wall subdir-objects])

# Without this, automake tries to be smart and rebuilt
# the autoconf generated files such as configure, aclocal.m4, etc.,
# in case the timestamps of files such as configure.ac are newer
#
# This only makes trouble for end users with out-of-date autoconf versions
# that cannot produce these files
AM_MAINTAINER_MODE([disable])

AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_HEADERS([config.h])
AM_SILENT_RULES([yes])

rm -rf config.h config-f90.h

# Set the libtool library version, see LIBRARY_INTERFACE
#
# See http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
#
# [c:r:a]
#
# c: The currently implement interface
# r: The revision number of the current interface, that is the number
#    of released source-code changes for the current interface
# a: The "age" is the number of interfaces prior to c that are also supported
#    by the current interface, as they are ABI compatible (e.g. only new symbols
#    were added by the new interface)
#
AC_SUBST([ELPA_SO_VERSION], [3:0:0])
#


AX_CHECK_GNU_MAKE()
if test x$_cv_gnu_make_command = x ; then
        AC_MSG_ERROR([Need GNU Make])
fi

AC_CHECK_PROG(CPP_FOUND,cpp,yes,no)
if test x"${CPP_FOUND}" = xno; then
  AC_MSG_ERROR([no cpp found])
fi

# gnu-make fortran module dependencies
m4_include([fdep/fortran_dependencies.m4])
FDEP_F90_GNU_MAKE_DEPS

dnl check whether mpi compilers are available;
dnl if not abort since it is mandatory

# C
AC_LANG([C])
m4_include([m4/ax_prog_cc_mpi.m4])
AX_PROG_CC_MPI([true],[],[AC_MSG_ERROR([no MPI C wrapper found])])
AC_PROG_INSTALL

: ${CFLAGS=""}
: ${CXXFLAGS=""}
#: ${FCLAGS="-O2"}

AM_PROG_AR
AM_PROG_AS


# Fortran
AC_LANG([Fortran])
m4_include([m4/ax_prog_fc_mpi.m4])
AX_PROG_FC_MPI([],[],[AC_MSG_ERROR([no MPI Fortran wrapper found])])


# C++
AC_LANG([C++])
AC_PROG_CXX




dnl variables needed for the tests

dnl these test will cause an abort of configure if not
dnl successful. However, if MKL is found then the blas, blacs,
dnl lapack, and scalapack test can fail and vice versa
have_blas=no
have_blacs=no
have_mkl=no
have_lapack=no
have_scalapack=no

dnl these tests will decide which kernels can be build
dnl the usual case is all except the BlueGene (bg) kernels

can_compile_sse=no
can_compile_bgp=no
can_compile_bqq=no

fortran_can_check_environment=no
use_specific_real_kernel=no
use_specific_complex_kernel=no

install_real_generic=yes
install_real_generic_simple=yes
install_real_sse=no
install_real_bgp=no
install_real_bgq=no
install_real_avx_block2=no
install_real_avx_block4=no
install_real_avx_block6=no

install_complex_generic=yes
install_complex_generic_simple=yes
install_complex_sse=no
install_complex_bgp=no
install_complex_bgq=no
install_complex_avx_block1=no
install_complex_avx_block2=no

AC_LANG([C])

dnl build with ftimings support
AC_MSG_CHECKING(whether ELPA should be build with ftimings support)
AC_ARG_WITH([ftimings],
		AS_HELP_STRING([--with-ftimings],
			       [detailed timings, default no.]),
	      [with_ftimings=yes],
	      [with_ftimings=no])
AC_MSG_RESULT([${with_ftimings}])

dnl build with the possibilty to redirect stdout and stderr
dnl per MPI task in a file
AC_MSG_CHECKING(whether stdout/stderr file redirect should be enabled)
AC_ARG_WITH([redirect],
		AS_HELP_STRING([--with-redirect],
			       [for test programs, allow redirection of stdout/stderr per MPI taks in a file (useful for ftimings), default no.]),
	      [with_redirect=yes],
	      [with_redirect=no])
AC_MSG_RESULT([${with_redirect}])

if test x"${with_redirect}" = x"yes"; then
  AC_DEFINE([HAVE_REDIRECT], [1], [Redirect stdout and stderr of test programs per MPI tasks to a file])
fi
AM_CONDITIONAL([HAVE_REDIRECT],[test x"$with_redirect" = x"yes"])

if test x"${with_ftimings}" = x"yes"; then
  AC_DEFINE([HAVE_DETAILED_TIMINGS], [1], [Enable more timings])
  AC_ARG_ENABLE([papi],
	[AS_HELP_STRING([--disable-papi],[Do not use PAPI to also measure flop count, autodetected by default])],
	[want_papi=$enableval],[want_papi="auto"])
  papi_found=unknown
  if test x"$want_papi" != x"no" ; then
    AC_CHECK_LIB([papi],[PAPI_library_init],[papi_found="yes"],[papi_found="no"])
    if test x"$want_papi" = x"yes" ; then
      if test x"$papi_found" = x"no" ; then
        AC_MSG_ERROR(["Could not find usable PAPI installation, please adjust CFLAGS, LDFLAGS"])
      fi
    fi
  fi
  if test x"$papi_found" = x"yes"; then
    AC_DEFINE([HAVE_LIBPAPI], [1], [Use the PAPI library])
    LIBS="-lpapi $LIBS"
  fi
fi
AM_CONDITIONAL([HAVE_DETAILED_TIMINGS],[test x"$with_ftimings" = x"yes"])

AC_MSG_CHECKING(whether SSE assembler kernel can be compiled)

$CC -c $srcdir/src/elpa2_kernels/elpa2_kernels_asm_x86_64.s -o test.o 2>/dev/null
if test "$?" == 0; then
  can_compile_sse=yes
  install_real_sse=yes
  install_complex_sse=yes
else
  can_compile_sse=no
  install_real_sse=no
  install_complex_sse=no
fi
rm -f ./test.o
AC_MSG_RESULT([${can_compile_sse}])

dnl check whether one can compile with avx - gcc intrinsics

dnl first pass: try with specified CFLAGS and CXXFLAGS
AC_MSG_CHECKING([whether we can compile AVX intrinsics in C])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
 #include <x86intrin.h>
 int main(int argc, char **argv){
 double* q;
 __m256d a1_1 = _mm256_load_pd(q);
 return 0;
 }
 ])],
 [can_compile_avx=yes],
 [can_compile_avx=no]
)
AC_MSG_RESULT([${can_compile_avx}])
if test "${can_compile_avx}" = "yes" ; then
  AC_MSG_CHECKING([whether we can compile AVX intrinsics in C++])
  AC_LANG_PUSH([C++])
  AC_COMPILE_IFELSE([AC_LANG_SOURCE([
   #include <x86intrin.h>
   int main(int argc, char **argv){
   double* q;
   __m256d a1_1 = _mm256_load_pd(q);
   return 0;
   }
   ])],
   [can_compile_avx=yes],
   [can_compile_avx=no]
  )
  AC_LANG_POP([C++])
  AC_MSG_RESULT([${can_compile_avx}])
  if test "${can_compile_avx}" = "no" ; then
    AC_MSG_WARN([Cannot compile C++ with AVX: disabling AVX alltogether])
  fi
fi

if test "${can_compile_avx}" = "yes" ; then
  install_real_avx_block2=yes
  install_real_avx_block4=yes
  install_real_avx_block6=yes

  install_complex_avx_block1=yes
  install_complex_avx_block2=yes
fi

dnl set the AVX optimization flags if this option is specified
AC_MSG_CHECKING(whether AVX optimization flags should be set automatically)
AC_ARG_WITH([avx-optimization],
		AS_HELP_STRING([--with-avx-optimization],
			       [use AVX optimization, default no.]),
	      [with_avx_optimization=yes],
	      [with_avx_optimization=no])
AC_MSG_RESULT([${with_avx_optimization}])
if test x"${with_avx_optimization}" = x"yes"; then
 CFLAGS="$CFLAGS -funsafe-loop-optimizations -funsafe-math-optimizations -ftree-vect-loop-version -ftree-vectorize"
 CXXFLAGS="$CXXFLAGS -funsafe-loop-optimizations -funsafe-math-optimizations -ftree-vect-loop-version -ftree-vectorize"
fi

AC_LANG([Fortran])
AC_FC_FREEFORM
AC_FC_MODULE_FLAG
AC_FC_MODULE_OUTPUT_FLAG
AC_FC_LIBRARY_LDFLAGS

AC_MSG_CHECKING(whether OpenMP usage is specified)
AC_ARG_WITH([openmp],
		AS_HELP_STRING([--with-openmp],
			       [use OpenMP threading, default no.]),
	      [with_openmp=yes],
	      [with_openmp=no])
  AC_MSG_RESULT([${with_openmp}])
  if test x"${enable_openmp}" = x"yes"; then
     with_openmp=yes
     AC_MSG_CHECKING(whether --enable-openmp is specified)
     AC_MSG_RESULT([${enable_openmp}])
  fi
  AM_CONDITIONAL([WITH_OPENMP],[test x"$with_openmp" = x"yes"])
  if test x"${with_openmp}" = x"yes"; then
	AC_DEFINE([WITH_OPENMP], [1], [use OpenMP threading])

        AX_ELPA_OPENMP
        if test "$ac_cv_prog_fc_openmp" = unsupported; then
          AC_MSG_ERROR([Could not compile a program with OpenMP, adjust FCFLAGS])
        fi

        # Append to flags as this influences which
        # kind of MPI library has to be used (thread-safe or not)
        FCFLAGS="$OPENMP_FCFLAGS $FCFLAGS"
	LDFLAGS="$OPENMP_FCFLAGS $LDFLAGS"
  fi

save_FCFLAGS=$FCFLAGS
save_LDFLAGS=$LDFLAGS

AC_ARG_VAR([SCALAPACK_LDFLAGS],[Extra LDFLAGS necessary to link a program with Scalapack])
AC_ARG_VAR([SCALAPACK_FCFLAGS],[Extra FCFLAGS necessary to compile a Fortran program with Scalapack])

FCFLAGS="$FCFLAGS $SCALAPACK_FCFLAGS"
LDFLAGS="$LDFLAGS $SCALAPACK_LDFLAGS"

dnl check whether fortran error_unit is defined
AC_MSG_CHECKING([whether Fortran module iso_fortran_env is available])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  program test_error_unit
    use ISO_FORTRAN_ENV, only : error_unit
    implicit none

    write(error_unit,*) "error_unit is defined"
  end program
])],
  [can_use_iso_fortran_env=yes],
  [can_use_iso_fortran_env=no]
)
AC_MSG_RESULT([${can_use_iso_fortran_env}])

dnl check whether one can link with specified MKL (desired method)
AC_MSG_CHECKING([whether we can compile a Fortran program using MKL])


AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  program test_mkl
    use mkl_service
    character*198 :: string
    call mkl_get_version_string(string)
    write(*,'(a)') string
  end program
])],
  [can_compile_with_mkl=yes],
  [can_compile_with_mkl=no]
)
AC_MSG_RESULT([${can_compile_with_mkl}])

if test x"$can_compile_with_mkl" = x"yes" ; then
  AC_MSG_CHECKING([whether we can link a Fortran program with MKL])
  AC_LINK_IFELSE([AC_LANG_SOURCE([
    program test_mkl
      use mkl_service
      character*198 :: string
      call mkl_get_version_string(string)
      write(*,'(a)') string
    end program
  ])],
    [have_mkl=yes],
    [have_mkl=no]
  )
  AC_MSG_RESULT([${have_mkl}])
fi

dnl if not mkl, check all the necessary individually
if test x"${have_mkl}" = x"yes" ; then
  WITH_MKL=1
else

  dnl first check blas
  AC_SEARCH_LIBS([dgemm],[blas],[have_blas=yes],[have_blas=no])
  AC_MSG_CHECKING([whether we can link a program with a blas lib])
  AC_MSG_RESULT([${have_blas}])

  if test x"${have_blas}" = x"no" ; then
    AC_MSG_ERROR([could not link with blas: specify path]) 
  fi
  dnl now lapack
  AC_SEARCH_LIBS([dlarrv],[lapack],[have_lapack=yes],[have_lapack=no])
  AC_MSG_CHECKING([whether we can link a program with a lapack lib])
  AC_MSG_RESULT([${have_lapack}])

  if test x"${have_lapack}" = x"no" ; then
    AC_MSG_ERROR([could not link with lapack: specify path])
  fi

  dnl test whether scalapack already contains blacs
  scalapack_libs="mpiscalapack scalapack"
  old_LIBS="$LIBS"
  for lib in ${scalapack_libs}; do
    LIBS="-l${lib} ${old_LIBS}"
    AC_MSG_CHECKING([whether -l${lib} already contains a BLACS implementation])
    AC_LINK_IFELSE([AC_LANG_FUNC_LINK_TRY([blacs_gridinit])],[blacs_in_scalapack=yes],[blacs_in_scalapack=no])
    AC_MSG_RESULT([${blacs_in_scalapack}])
    if test x"${blacs_in_scalapack}" = x"yes"; then
      break
    fi
  done

  if test x"${blacs_in_scalapack}" = x"no"; then
    LIBS="${old_LIBS}"

    dnl Test for stand-alone blacs
    AC_SEARCH_LIBS([bi_f77_init],[mpiblacsF77init],[],[],[-lmpiblacs])
    AC_SEARCH_LIBS([blacs_gridinit],[mpiblacs blacs],[have_blacs=yes],[have_blacs=no])

    if test x"${have_blacs}" = x"no"; then
      AC_MSG_ERROR([No usable BLACS found. If installed in a non-standard place, please specify suitable LDFLAGS and FCFLAGS as arguments to configure])
    fi
  fi

  AC_SEARCH_LIBS([pdtran],[$scalapack_libs],[have_scalapack=yes],[have_scalapack=no])

  if test x"${have_scalapack}" = x"no" ; then
    AC_MSG_ERROR([could not link with scalapack: specify path])
  fi

  dnl check whether we can link alltogehter
  AC_MSG_CHECKING([whether we can link a Fortran program with all blacs/scalapack])
  AC_LINK_IFELSE([AC_LANG_SOURCE([
    program dgemm_test

      integer , parameter:: M = 4, N = 3, K = 2
      real :: A(M,K), B(K,N), C(M,N)

      call dgemm('N','N',M,N,K,1.0,A,M,B,K,0.0,C,M)

     end program dgemm_test
     ])],
     [can_link_with_blacs_scalapack=yes],
     [can_link_with_blacs_scalapack=no]
   )
   AC_MSG_RESULT([${can_link_with_blacs_scalapack}])

   if test x"${can_link_with_blacs_scalapack}" = x"yes" ; then
     WITH_BLACS=1
   else
   AC_MSG_ERROR([We can neither link with MKL or another Scalpack. Please specify SCALAPACK_LDFLAGS and SCALAPACK_FCFLAGS!])
   fi
fi

dnl important: reset them again!
FCFLAGS=$save_FCFLAGS
LDFLAGS=$save_LDFLAGS

dnl check for intrinsic fortran function of 2003 standard
AC_MSG_CHECKING([whether we can use the intrinsic Fortran function "get_environment_variable"])


AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  program test_get_environment

    character(len=256) :: homedir
    call get_environment_variable("HOME",homedir)
  end program
])],
  [fortran_can_check_environment=yes],
  [fortran_can_check_environment=no]
)
AC_MSG_RESULT([${fortran_can_check_environment}])


dnl now check which kernels can be compiled

dnl the checks for SSE were already done before
dnl the checks for AVX were already done before

dnl check BGP kernel
AC_MSG_CHECKING([whether we can compile with BGP intrinsics])


AC_LINK_IFELSE([AC_LANG_SOURCE([
  program test_bgp
    complex*16 :: y3,q3,h2
    y3 = fxcpmadd(y3,q3,h2)

  end program
])],
  [can_compile_bgp=yes],
  [can_compile_bgp=no]
)
AC_MSG_RESULT([${can_compile_bgp}])

if test x"${can_compile_bgp}" = x"yes" ; then
  install_real_bgp=yes
  install_complex_bgp=yes
fi

dnl check BGQ kernel
AC_MSG_CHECKING([whether we can compile with BGQ intrinsics])

AC_LINK_IFELSE([AC_LANG_SOURCE([
  program test_bgq
    VECTOR(REAL(8))::QPX_x2
    real*8 :: hh(10,2))
    QPX_h2 = VEC_SPLATS(hh(2,2))

  end program
])],
  [can_compile_bgq=yes],
  [can_compile_bgq=no]
)
AC_MSG_RESULT([${can_compile_bgq}])

if test x"${can_compile_bgq}" = x"yes" ; then
  install_real_bgq=yes
  install_complex_bgq=yes
fi


dnl environment variable setting of kernel
if test x"${fortran_can_check_environment}" = x"yes" ; then
 AC_DEFINE([HAVE_ENVIRONMENT_CHECKING],[1],[Fortran can querry environment variables])
fi


dnl macro for testing whether the user wanted to compile only with one
dnl specific real kernel

dnl usage: DEFINE_OPTION([only-real-generic-kernel],[generic-kernel],[with_real_generic_kernel],[install_real_generic])

AC_DEFUN([DEFINE_OPTION_REAL_KERNEL],[
  AC_ARG_WITH([$1],
               AS_HELP_STRING([--with-$1],
                              [only compile $2 for real case]),
              [],[with_option=no])
   
   if test x"${with_option}" = x"yes" ; then
    if test x"${use_specific_real_kernel}" = x"no" ; then

    dnl make sure that all the other kernels are unset
    install_real_generic=no
    install_real_generic_simple=no
    install_real_sse=no
    install_real_bgp=no
    install_real_bgq=no
    install_real_avx_block2=no
    install_real_avx_block4=no
    install_real_avx_block6=no
    use_specific_real_kernel=yes
    dnl now set the specific kernel
    $3=yes

    dnl in case of SSE or AVX make sure that we can compile the choosen kernel
    if test x"${install_real_sse}" = x"yes" ; then
     if test x"${can_compile_sse}" = x"no" ; then
       AC_MSG_ERROR([$2 kernel was set, but cannot be compiled!])
     fi		   
    fi

    if test x"${install_real_avx_block2}" = x"yes" ; then
     if test x"${can_compile_avx}" = x"no" ; then
       AC_MSG_ERROR([$2 kernel was set, but cannot be compiled!])
     fi		   
    fi

    if test x"${install_real_avx_block4}" = x"yes" ; then
     if test x"${can_compile_avx}" = x"no" ; then
       AC_MSG_ERROR([$2 kernel was set, but cannot be compiled!])
     fi		   
    fi

    if test x"${install_real_avx_block6}" = x"yes" ; then
     if test x"${can_compile_avx}" = x"no" ; then
       AC_MSG_ERROR([$2 kernel was set, but cannot be compiled!])
     fi		   
    fi


    AC_MSG_NOTICE([$1 will be the only compiled kernel for real case])
   else
    AC_MSG_FAILURE([$1 failed; A specific kernel for real case has already been defined before!])
   fi
  fi
])


dnl last check whether user wants to compile only a specific kernel
dnl
dnl real kernels
dnl
dnl generic kernel
DEFINE_OPTION_REAL_KERNEL([only-real-generic-kernel],[generic-kernel],[install_real_generic])

dnl generic-simple kernel
DEFINE_OPTION_REAL_KERNEL([only-real-generic-simple-kernel],[generic-simple-kernel],[install_real_generic_simple])

dnl sse kernel
DEFINE_OPTION_REAL_KERNEL([only-real-sse-kernel],[sse-kernel],[install_real_sse])

dnl bgp kernel
DEFINE_OPTION_REAL_KERNEL([only-real-bgp-kernel],[bgp-kernel],[install_real_bgp])

dnl bgq kernel
DEFINE_OPTION_REAL_KERNEL([only-real-bgq-kernel],[bgq-kernel],[install_real_bgq])

dnl real-avx-block2 kernel
DEFINE_OPTION_REAL_KERNEL([only-real-avx-block2-kernel],[real-avx-block2-kernel],[install_real_avx_block2])

dnl real-avx-block4 kernel
DEFINE_OPTION_REAL_KERNEL([only-real-avx-block4-kernel],[real-avx-block4-kernel],[install_real_avx_block4])

dnl real-avx-block6 kernel
DEFINE_OPTION_REAL_KERNEL([only-real-avx-block6-kernel],[real-avx-block6-kernel],[install_real_avx_block6])

dnl last check whether user wants to compile ony a specific kernel
dnl
dnl complex kernels
dnl

AC_DEFUN([DEFINE_OPTION_COMPLEX_KERNEL],[
  AC_ARG_WITH([$1],
                 AS_HELP_STRING([--with-$1],
                                [only compile $2 for complex case]),
              [],[with_option=no])
   
   if test x"${with_option}" = x"yes" ; then
    if test x"${use_specific_complex_kernel}" = x"no" ; then

    dnl make sure that all the other kernels are unset
    install_complex_generic=yes
    install_complex_generic_simple=no
    install_complex_sse=no
    install_complex_bgp=no
    install_complex_bgq=no
    install_complex_avx_block1=no
    install_complex_avx_block2=no

    use_specific_complex_kernel=yes
    dnl now set the specific kernel
    $3=yes

    dnl in case of SSE or AVX make sure that we can compile the choosen kernel
    if test x"${install_complex_sse}" = x"yes" ; then
     if test x"${can_compile_sse}" = x"no" ; then
       AC_MSG_ERROR([$2 kernel was set, but cannot be compiled!])
     fi		   
    fi

    if test x"${install_complex_avx_block1}" = x"yes" ; then
     if test x"${can_compile_avx}" = x"no" ; then
       AC_MSG_ERROR([$2 kernel was set, but cannot be compiled!])
     fi		   
    fi

    if test x"${install_complex_avx_block2}" = x"yes" ; then
     if test x"${can_compile_avx}" = x"no" ; then
       AC_MSG_ERROR([$2 kernel was set, but cannot be compiled!])
     fi		   
    fi

    AC_MSG_NOTICE([$1 will be the only compiled kernel for real case])
   else
    AC_MSG_FAILURE([$1 failed; A specific kernel for real case has already been defined before!])
   fi
  fi
])


dnl generic kernel
DEFINE_OPTION_COMPLEX_KERNEL([only-complex-generic-kernel],[generic-kernel],[install_complex_generic])


dnl generic-simple kernel
DEFINE_OPTION_COMPLEX_KERNEL([only-complex-generic-simple-kernel],[generic-simple-kernel],[install_complex_generic_simple])

dnl sse kernel
DEFINE_OPTION_COMPLEX_KERNEL([only-complex-sse-kernel],[sse-kernel],[install_complex_sse])


dnl complex-bqp kernel
DEFINE_OPTION_COMPLEX_KERNEL([only-complex-bgp-kernel],[bgp-kernel],[install_complex_bgp])

dnl complex-bqq kernel
DEFINE_OPTION_COMPLEX_KERNEL([only-complex-bgq-kernel],[bgq-kernel],[install_complex_bgq])

dnl complex-avx-block1 kernel
DEFINE_OPTION_COMPLEX_KERNEL([only-complex-avx-block1-kernel],[complex-avx-block1-kernel],[install_complex_avx_block1])

dnl complex-avx-block2 kernel
DEFINE_OPTION_COMPLEX_KERNEL([only-complex-avx-block2-kernel],[complex-avx-block2-kernel],[install_complex_avx_block2])


dnl set the conditionals according to the previous tests
if test x"${can_use_iso_fortran_env}" = x"yes" ; then
 AC_DEFINE([HAVE_ISO_FORTRAN_ENV],[1],[can use module iso_fortran_env])
fi


AM_CONDITIONAL([WITH_REAL_GENERIC_KERNEL],[test x"$install_real_generic" = x"yes"])
if test x"${install_real_generic}" = x"yes" ; then
 AC_DEFINE([WITH_REAL_GENERIC_KERNEL],[1],[can use real generic kernel])
fi

AM_CONDITIONAL([WITH_COMPLEX_GENERIC_KERNEL],[test x"$install_complex_generic" = x"yes"])
if test x"${install_complex_generic}" = x"yes" ; then
 AC_DEFINE([WITH_COMPLEX_GENERIC_KERNEL],[1],[can use complex generic kernel])
fi

AM_CONDITIONAL([WITH_REAL_GENERIC_SIMPLE_KERNEL],[test x"$install_real_generic_simple" = x"yes"])
if test x"${install_real_generic_simple}" = x"yes" ; then
 AC_DEFINE([WITH_REAL_GENERIC_SIMPLE_KERNEL],[1],[can use real generic-simple kernel])
fi

AM_CONDITIONAL([WITH_COMPLEX_GENERIC_SIMPLE_KERNEL],[test x"$install_complex_generic_simple" = x"yes"])
if test x"${install_complex_generic_simple}" = x"yes" ; then
 AC_DEFINE([WITH_COMPLEX_GENERIC_SIMPLE_KERNEL],[1],[can use complex generic-simple kernel])
fi

AM_CONDITIONAL([WITH_REAL_SSE_KERNEL],[test x"$install_real_sse" = x"yes"])
if test x"${install_real_sse}" = x"yes" ; then
 AC_DEFINE([WITH_REAL_SSE_KERNEL],[1],[can use real SSE kernel])
fi

AM_CONDITIONAL([WITH_COMPLEX_SSE_KERNEL],[test x"$install_complex_sse" = x"yes"])
if test x"${install_complex_sse}" = x"yes" ; then
 AC_DEFINE([WITH_COMPLEX_SSE_KERNEL],[1],[can use complex SSE kernel])
fi

AM_CONDITIONAL([WITH_REAL_AVX_BLOCK2_KERNEL],[test x"$install_real_avx_block2" = x"yes"])
if test x"${install_real_avx_block2}" = x"yes" ; then
 AC_DEFINE([WITH_REAL_AVX_BLOCK2_KERNEL],[1],[can use real_avx_block2 kernel])
fi

AM_CONDITIONAL([WITH_REAL_AVX_BLOCK4_KERNEL],[test x"$install_real_avx_block4" = x"yes"])
if test x"${install_real_avx_block4}" = x"yes" ; then
 AC_DEFINE([WITH_REAL_AVX_BLOCK4_KERNEL],[1],[can use real_avx_block4 kernel])
fi

AM_CONDITIONAL([WITH_REAL_AVX_BLOCK6_KERNEL],[test x"$install_real_avx_block6" = x"yes"])
if test x"${install_real_avx_block6}" = x"yes" ; then
 AC_DEFINE([WITH_REAL_AVX_BLOCK6_KERNEL],[1],[can use real_avx_block6 kernel])
fi

AM_CONDITIONAL([WITH_COMPLEX_AVX_BLOCK1_KERNEL],[test x"$install_complex_avx_block1" = x"yes"])
if test x"${install_complex_avx_block1}" = x"yes" ; then
 AC_DEFINE([WITH_COMPLEX_AVX_BLOCK1_KERNEL],[1],[can use complex_avx_block1 kernel])
fi

AM_CONDITIONAL([WITH_COMPLEX_AVX_BLOCK2_KERNEL],[test x"$install_complex_avx_block2" = x"yes"])
if test x"${install_complex_avx_block2}" = x"yes" ; then
 AC_DEFINE([WITH_COMPLEX_AVX_BLOCK2_KERNEL],[1],[can use complex_avx_block2 kernel])
fi

AM_CONDITIONAL([WITH_REAL_BGP_KERNEL],[test x"$install_real_bgp" = x"yes"])
if test x"${install_real_bgp}" = x"yes" ; then
 AC_DEFINE([WITH_REAL_BGP_KERNEL],[1],[can use real BGP kernel])
fi

AM_CONDITIONAL([WITH_REAL_BGQ_KERNEL],[test x"$install_real_bgq" = x"yes"])
if test x"${install_real_bgq}" = x"yes" ; then
 AC_DEFINE([WITH_REAL_BGQ_KERNEL],[1],[can use real BGQ kernel])
fi

if test x"${use_specific_complex_kernel}" = x"no" ; then
 AC_DEFINE([WITH_NO_SPECIFIC_COMPLEX_KERNEL],[1],[do not use only one specific complex kernel (set at compile time)])
fi

if test x"${use_specific_real_kernel}" = x"no" ; then
 AC_DEFINE([WITH_NO_SPECIFIC_REAL_KERNEL],[1],[do not use only one specific real kernel (set at compile time)])
fi

LT_INIT

AC_SUBST([WITH_MKL])
AC_SUBST([WITH_BLACS])
AC_SUBST([with_amd_bulldozer_kernel])
AC_SUBST([FC_MODINC])
AC_SUBST([FC_MODOUT])
AC_SUBST([OPENMP_CFLAGS])
AC_SUBST([OPENMP_FCFLAGS])
AC_SUBST([OPENMP_LDFLAGS])
#AC_SUBST(OPT_FCFLAGS)

rm -rf modules/ .fortran_dependencies/
mkdir modules

#gl_VISIBILITY
#AH_BOTTOM([#if HAVE_VISIBILITY
#define EXPORTED __attribute__((__visibility__("default")))
#define HIDDEN   __attribute__((__visibility__("hidden")))
#else
#define EXPORTED
#define HIDDEN
#endif])


# Some part of libtool is too smart and tries to parse the output of
#   gfortran -v
# and catches anything that resembles a -l library link specification.
# Unfortunately, recent versions of gfortran emit
#   -l gfortran
# with a space between -l and gfortran. The empty -l is then included
# into "postdeps_FC" and causes linking errors later on.
postdeps_FC=$(echo $postdeps_FC | sed 's/-l //g')

if test x"${with_openmp}" = x"yes"; then
	SUFFIX="_openmp"
else
	SUFFIX=""
fi
AC_SUBST([SUFFIX])
AC_SUBST([PKG_CONFIG_FILE],[elpa${SUFFIX}-${PACKAGE_VERSION}.pc])

AC_CONFIG_FILES([
  Makefile
  ${PKG_CONFIG_FILE}:elpa.pc.in
])

AC_OUTPUT


if test -e config.h ; then
  grep "^#define" config.h > config-f90.h
else
  echo "Warning! No config.h was generated, check for errors and re-run configure!"
  exit 1
fi

echo "Generating elpa/elpa_generated.h..."
mkdir -p elpa
grep "^ *!c>" $srcdir/src/elpa_c_interface.F90 | sed 's/^ *!c>//;' > elpa/elpa_generated.h || exit 1

if test "${can_compile_avx}" = "no" ; then
  AC_MSG_WARN([Could not compile AVX instructions])
fi