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AC_PREREQ([2.69])
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AC_INIT([elpa],[2015.11.001], [elpa-library@mpcdf.mpg.de])
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AC_SUBST([PACKAGE_VERSION])
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AC_CONFIG_SRCDIR([src/elpa1.F90])

AM_INIT_AUTOMAKE([foreign -Wall subdir-objects])
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# 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# This only makes trouble for end users with out-of-date autoconf versions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])

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

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rm -rf config.h config-f90.h

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# 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)
#
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AC_SUBST([ELPA_SO_VERSION], [5:0:1])
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#

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

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

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###

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m4_include([m4/ax_elpa_openmp.m4])

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

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AC_MSG_CHECKING(whether --enable-shared-memory-only is specified)
AC_ARG_ENABLE([shared-memory-only],
		AS_HELP_STRING([--enable-shared-memory-only],
			       [do not use MPI; ELPA will be build for one node shared-memory runs only]),
	      [],
	      [enable_shared_memory_only=no])
AC_MSG_RESULT([${enable_shared_memory_only}])
AM_CONDITIONAL([WITH_MPI],[test x"$enable_shared_memory_only" = x"no"])
if test x"${enable_shared_memory_only}" = x"no"; then
	AC_DEFINE([WITH_MPI], [1], [use MPI])
fi

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

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# C
AC_LANG([C])
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AX_PROG_CC_MPI([test x"$enable_shared_memory_only" = xno],[use_mpi=yes],[use_mpi=no])

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if test x"${enable_openmp}" = x"yes"; then
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  AX_ELPA_OPENMP
  if test "$ac_cv_prog_cc_openmp" = unsupported; then
    AC_MSG_ERROR([Could not compile a C program with OpenMP, adjust CFLAGS])
  fi
  CFLAGS="$OPENMP_CFLAGS $CFLAGS"
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fi
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AC_PROG_INSTALL
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AM_PROG_AR
AM_PROG_AS
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# Fortran
AC_LANG([Fortran])
m4_include([m4/ax_prog_fc_mpi.m4])
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AX_PROG_FC_MPI([test x"$enable_shared_memory_only" = xno],[use_mpi=yes],[use_mpi=no])
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if test x"${enable_openmp}" = x"yes"; then
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  AX_ELPA_OPENMP
  if test "$ac_cv_prog_fc_openmp" = unsupported; then
    AC_MSG_ERROR([Could not compile a Fortran program with OpenMP, adjust FCFLAGS])
  fi
  FCFLAGS="$OPENMP_FCFLAGS $FCFLAGS"
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fi

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# C++
AC_LANG([C++])
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AC_PROG_CXX
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if test x"${enable_openmp}" = x"yes"; then
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  AX_ELPA_OPENMP
  if test "$ac_cv_prog_cxx_openmp" = unsupported; then
    AC_MSG_ERROR([Could not compile a C++ program with OpenMP, adjust CXXFLAGS])
  fi
  CXXFLAGS="$OPENMP_CXXFLAGS $CXXFLAGS"
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fi
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dnl variables needed for the tests

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dnl do NOT remove any variables here, until
dnl 1. you know 100% what you are doing
dnl 2. you tested ALL configure functionality afterwards
dnl Otherwise, you most likely break some functionality

dnl as default always define the generic kernels to be build
dnl this is only unset if gpu_support_only is defined, or
dnl other specific real/complex kernels are wanted
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install_real_generic=yes
install_real_generic_simple=yes

install_complex_generic=yes
install_complex_generic_simple=yes
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AC_LANG([C])

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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}])

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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"])
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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"])

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AC_MSG_CHECKING(whether SSE assembler kernel can be compiled)

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$CC -c $srcdir/src/elpa2_kernels/elpa2_kernels_asm_x86_64.s -o test.o 2>/dev/null
if test "$?" == 0; then
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  can_compile_sse=yes
  install_real_sse=yes
  install_complex_sse=yes
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else
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  can_compile_sse=no
  install_real_sse=no
  install_complex_sse=no
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fi
rm -f ./test.o
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AC_MSG_RESULT([${can_compile_sse}])
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dnl check whether one can compile with avx - gcc intrinsics
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dnl first pass: try with specified CFLAGS and CXXFLAGS
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AC_MSG_CHECKING([whether we can compile AVX intrinsics in C])
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([
 #include <x86intrin.h>
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 int main(int argc, char **argv){
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 double* q;
 __m256d a1_1 = _mm256_load_pd(q);
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 return 0;
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 }
 ])],
 [can_compile_avx=yes],
 [can_compile_avx=no]
)
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AC_MSG_RESULT([${can_compile_avx}])
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if test "${can_compile_avx}" = "yes" ; then
  AC_MSG_CHECKING([whether we can compile AVX intrinsics in C++])
  AC_LANG_PUSH([C++])
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  AC_COMPILE_IFELSE([AC_LANG_SOURCE([
   #include <x86intrin.h>
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   int main(int argc, char **argv){
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   double* q;
   __m256d a1_1 = _mm256_load_pd(q);
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   return 0;
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   }
   ])],
   [can_compile_avx=yes],
   [can_compile_avx=no]
  )
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  AC_LANG_POP([C++])
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  AC_MSG_RESULT([${can_compile_avx}])
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  if test "${can_compile_avx}" = "no" ; then
    AC_MSG_WARN([Cannot compile C++ with AVX: disabling AVX alltogether])
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  fi
fi

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AC_MSG_CHECKING([whether we can compile AVX2 intrinsics in C])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
 #include <x86intrin.h>
 int main(int argc, char **argv){
 double* q;
 __m256d q1 = _mm256_load_pd(q);
 __m256d y1 = _mm256_fmadd_pd(q1, q1, q1);
 return 0;
 }
 ])],
 [can_compile_avx2=yes],
 [can_compile_avx2=no]
)
AC_MSG_RESULT([${can_compile_avx2}])
if test "${can_compile_avx2}" = "yes" ; then
  AC_MSG_CHECKING([whether we can compile AVX2 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 q1 = _mm256_load_pd(q);
   __m256d y1 = _mm256_fmadd_pd(q1, q1, q1);
   return 0;
   }
   ])],
   [can_compile_avx2=yes],
   [can_compile_avx2=no]
  )
  AC_LANG_POP([C++])
  AC_MSG_RESULT([${can_compile_avx2}])
  if test "${can_compile_avx2}" = "no" ; then
    AC_MSG_WARN([Cannot compile C++ with AVX2!])
  fi
fi


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if test "${can_compile_avx}" = "yes" ; then
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  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
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  want_avx=yes
else
  install_real_avx_block2=no
  install_real_avx_block4=no
  install_real_avx_block6=no

  install_complex_avx_block1=no
  install_complex_avx_block2=no

  want_avx=yes
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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])
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AC_MSG_RESULT([${with_avx_optimization}])
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if test x"${with_avx_optimization}" = x"yes"; then
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 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
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AC_LANG([Fortran])
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AC_FC_FREEFORM
AC_FC_MODULE_FLAG
AC_FC_MODULE_OUTPUT_FLAG
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AC_FC_LIBRARY_LDFLAGS
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save_FCFLAGS=$FCFLAGS
save_LDFLAGS=$LDFLAGS

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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])

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FCFLAGS="$FCFLAGS $SCALAPACK_FCFLAGS"
LDFLAGS="$LDFLAGS $SCALAPACK_LDFLAGS"
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dnl check whether fortran error_unit is defined
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AC_MSG_CHECKING([whether Fortran module iso_fortran_env is available])
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([
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  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]
)
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AC_MSG_RESULT([${can_use_iso_fortran_env}])
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dnl check whether one can link with specified MKL (desired method)
AC_MSG_CHECKING([whether we can compile a Fortran program using MKL])


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

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

  dnl first check blas
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  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([${have_blas}])
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  if test x"${have_blas}" = x"no" ; then
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    AC_MSG_ERROR([could not link with blas: specify path])
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  fi
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  dnl now lapack
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  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([${have_lapack}])
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  if test x"${have_lapack}" = x"no" ; then
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    AC_MSG_ERROR([could not link with lapack: specify path])
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  fi
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  if test x"${enable_shared_memory_only}" = x"no"; then
    dnl test whether scalapack already contains blacs
    scalapack_libs="mpiscalapack scalapack"
    old_LIBS="$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
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    if test x"${blacs_in_scalapack}" = x"no"; then
      LIBS="${old_LIBS}"
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      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])
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      if test x"${have_blacs}" = x"no"; then
        AC_MSG_ERROR([No usable BLACS found. If installed in a non-standard place, please specify suitable LDFLAGS and FCFLAGS as arguments to configure])
      fi
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    fi
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    AC_SEARCH_LIBS([pdtran],[$scalapack_libs],[have_scalapack=yes],[have_scalapack=no])
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    if test x"${have_scalapack}" = x"no" ; then
      AC_MSG_ERROR([could not link with scalapack: specify path])
    fi
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  fi

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

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      integer , parameter:: M = 4, N = 3, K = 2
      real :: A(M,K), B(K,N), C(M,N)
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      call dgemm('N','N',M,N,K,1.0,A,M,B,K,0.0,C,M)
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     end program dgemm_test
     ])],
     [can_link_with_blacs_scalapack=yes],
     [can_link_with_blacs_scalapack=no]
   )
   AC_MSG_RESULT([${can_link_with_blacs_scalapack}])

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

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

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


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AC_COMPILE_IFELSE([AC_LANG_SOURCE([
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  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])


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AC_LINK_IFELSE([AC_LANG_SOURCE([
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  program test_bgp
    complex*16 :: y3,q3,h2
    y3 = fxcpmadd(y3,q3,h2)
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  end program
])],
  [can_compile_bgp=yes],
  [can_compile_bgp=no]
)
AC_MSG_RESULT([${can_compile_bgp}])

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if test x"${can_compile_bgp}" = x"yes" ; then
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  install_real_bgp=yes
  install_complex_bgp=yes
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else
  install_real_bgp=no
  install_complex_bgp=no
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fi

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

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AC_LINK_IFELSE([AC_LANG_SOURCE([
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  program test_bgq
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    VECTOR(REAL(8))::QPX_h2
    real*8         :: hh(10,2)
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    QPX_h2 = VEC_SPLATS(hh(2,2))
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  end program
])],
  [can_compile_bgq=yes],
  [can_compile_bgq=no]
)
AC_MSG_RESULT([${can_compile_bgq}])

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if test x"${can_compile_bgq}" = x"yes" ; then
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  install_real_bgq=yes
  install_complex_bgq=yes
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else
  install_real_bgq=no
  install_complex_bgq=no
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fi


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

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dnl last check whether user wants to compile only a specific kernel
dnl
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m4_include([m4/ax_elpa_specific_kernels.m4])
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dnl real kernels
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  dnl do not remove this variable it is needed in the macros
  use_specific_real_kernel=no
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  dnl generic kernel
  DEFINE_OPTION_SPECIFIC_REAL_KERNEL([real-generic-kernel-only],[generic-kernel],[install_real_generic])
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  dnl generic-simple kernel
  DEFINE_OPTION_SPECIFIC_REAL_KERNEL([real-generic-simple-kernel-only],[generic-simple-kernel],[install_real_generic_simple])
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  dnl sse kernel
  DEFINE_OPTION_SPECIFIC_REAL_KERNEL([real-sse-kernel-only],[sse-kernel],[install_real_sse])
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  dnl bgp kernel
  DEFINE_OPTION_SPECIFIC_REAL_KERNEL([real-bgp-kernel-only],[bgp-kernel],[install_real_bgp])
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  dnl bgq kernel
  DEFINE_OPTION_SPECIFIC_REAL_KERNEL([real-bgq-kernel-only],[bgq-kernel],[install_real_bgq])
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  dnl real-avx-block2 kernel
  DEFINE_OPTION_SPECIFIC_REAL_KERNEL([real-avx-block2-kernel-only],[real-avx-block2-kernel],[install_real_avx_block2])
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  dnl real-avx-block4 kernel
  DEFINE_OPTION_SPECIFIC_REAL_KERNEL([real-avx-block4-kernel]-only,[real-avx-block4-kernel],[install_real_avx_block4])
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  dnl real-avx-block6 kernel
  DEFINE_OPTION_SPECIFIC_REAL_KERNEL([real-avx-block6-kernel-only],[real-avx-block6-kernel],[install_real_avx_block6])
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dnl complex kernels

  dnl do not remove this variable it is needed in the macros
  use_specific_complex_kernel=no

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  dnl generic kernel
  DEFINE_OPTION_SPECIFIC_COMPLEX_KERNEL([complex-generic-kernel-only],[generic-kernel],[install_complex_generic])
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  dnl generic-simple kernel
  DEFINE_OPTION_SPECIFIC_COMPLEX_KERNEL([complex-generic-simple-kernel-only],[generic-simple-kernel],[install_complex_generic_simple])
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  dnl sse kernel
  DEFINE_OPTION_SPECIFIC_COMPLEX_KERNEL([complex-sse-kernel-only],[sse-kernel],[install_complex_sse])
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  dnl complex-bqp kernel
  DEFINE_OPTION_SPECIFIC_COMPLEX_KERNEL([complex-bgp-kernel-only],[bgp-kernel],[install_complex_bgp])
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  dnl complex-bqq kernel
  DEFINE_OPTION_SPECIFIC_COMPLEX_KERNEL([complex-bgq-kernel-only],[bgq-kernel],[install_complex_bgq])
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  dnl complex-avx-block1 kernel
  DEFINE_OPTION_SPECIFIC_COMPLEX_KERNEL([complex-avx-block1-kernel-only],[complex-avx-block1-kernel],[install_complex_avx_block1])
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  dnl complex-avx-block2 kernel
  DEFINE_OPTION_SPECIFIC_COMPLEX_KERNEL([complex-avx-block2-kernel-only],[complex-avx-block2-kernel],[install_complex_avx_block2])
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dnl set the conditionals according to the previous tests
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if test x"${can_use_iso_fortran_env}" = x"yes" ; then
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 AC_DEFINE([HAVE_ISO_FORTRAN_ENV],[1],[can use module iso_fortran_env])
fi

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

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

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

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

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

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

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

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

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

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

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

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

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

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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)])
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fi

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

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LT_INIT

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DX_PDF_FEATURE(OFF)
DX_PS_FEATURE(OFF)
DX_MAN_FEATURE(ON)
DX_HTML_FEATURE(ON)
DX_INIT_DOXYGEN([ELPA], [Doxyfile], [docs])

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DESPERATELY_WANT_ASSUMED_SIZE=0
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if test x"${DESPERATELY_WANT_ASSUMED_SIZE}" = x"yes" ; then
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  AC_DEFINE([DESPERATELY_WANT_ASSUMED_SIZE],[1],[use assumed size arrays, even if not debuggable])
fi

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AC_SUBST([WITH_MKL])
AC_SUBST([WITH_BLACS])
AC_SUBST([with_amd_bulldozer_kernel])
AC_SUBST([FC_MODINC])
AC_SUBST([FC_MODOUT])
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AC_SUBST([OPENMP_CFLAGS])
AC_SUBST([OPENMP_FCFLAGS])
AC_SUBST([OPENMP_LDFLAGS])
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#AC_SUBST(OPT_FCFLAGS)
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AC_SUBST([DOXYGEN_OUTPUT_DIR], [docs])
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rm -rf modules/ .fortran_dependencies/
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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])

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# 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 $postdeps_FC | sed 's/-l //g')
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if test x"${enable_openmp}" = x"yes"; then
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	SUFFIX="_openmp"
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else
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	SUFFIX=""
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fi
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AC_SUBST([SUFFIX])
AC_SUBST([PKG_CONFIG_FILE],[elpa${SUFFIX}-${PACKAGE_VERSION}.pc])
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AC_CONFIG_FILES([
  Makefile
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  Doxyfile
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  ${PKG_CONFIG_FILE}:elpa.pc.in
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])
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AC_OUTPUT
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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!"
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  exit 1
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fi
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echo "Generating elpa/elpa_generated.h..."
mkdir -p elpa
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grep -h "^ *!c>" $srcdir/src/elpa_c_interface.F90 | sed 's/^ *!c>//;' > elpa/elpa_generated.h || exit 1

echo "Generating test/shared_sources/generated.h..."
mkdir -p test/shared_sources
grep -h "^ *!c>" $srcdir/test/shared_sources/*.F90 | sed 's/^ *!c>//;' > test/shared_sources/generated.h || exit 1
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if test "${can_compile_avx}" = "no" ; then
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  if test x"${want_avx}" = x"yes" ; then
    AC_MSG_WARN([Could not compile AVX instructions])
  fi
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fi
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if test "${can_compile_avx2}" = "no" ; then
  if test x"${want_avx}" = x"yes" ; then
    AC_MSG_WARN([Could not compile AVX2 instructions])
  fi
fi
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