starpu-max/configure.ac

# StarPU --- Runtime system for heterogeneous multicore architectures.
#
# Copyright (C) 2009-2012  Université de Bordeaux 1
# Copyright (C) 2010, 2011, 2012  Centre National de la Recherche Scientifique
# Copyright (C) 2011  Télécom-SudParis
# Copyright (C) 2011, 2012  Institut National de Recherche en Informatique et Automatique
#
# StarPU is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or (at
# your option) any later version.
#
# StarPU is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# See the GNU Lesser General Public License in COPYING.LGPL for more details.

AC_INIT([StarPU],1.1.0, [starpu-devel@lists.gforge.inria.fr], starpu)
AC_CONFIG_SRCDIR(include/starpu.h)
AC_CONFIG_AUX_DIR([build-aux])

dnl Versioning.

AC_SUBST([STARPU_EFFECTIVE_VERSION])

. "$srcdir/STARPU-VERSION"
AC_SUBST([LIBSTARPU_INTERFACE_CURRENT])
AC_SUBST([LIBSTARPU_INTERFACE_REVISION])
AC_SUBST([LIBSTARPU_INTERFACE_AGE])
AC_SUBST([LIBSTARPUMPI_INTERFACE_CURRENT])
AC_SUBST([LIBSTARPUMPI_INTERFACE_REVISION])
AC_SUBST([LIBSTARPUMPI_INTERFACE_AGE])
AC_SUBST([LIBSTARPUFFT_INTERFACE_CURRENT])
AC_SUBST([LIBSTARPUFFT_INTERFACE_REVISION])
AC_SUBST([LIBSTARPUFFT_INTERFACE_AGE])
AC_SUBST([LIBSOCL_INTERFACE_CURRENT])
AC_SUBST([LIBSOCL_INTERFACE_REVISION])
AC_SUBST([LIBSOCL_INTERFACE_AGE])

AC_CANONICAL_SYSTEM

dnl Automake 1.11 introduced `silent-rules' and `color-tests'.  Use them
dnl when they're available.
m4_ifdef([AM_SILENT_RULES],
  [AM_INIT_AUTOMAKE([1.11 -Wall -Werror foreign silent-rules color-tests parallel-tests])],
  [AM_INIT_AUTOMAKE([1.10 -Wall -Werror foreign])])

m4_ifdef([AM_SILENT_RULES],
  [AM_SILENT_RULES(yes)])

AC_PREREQ(2.60)

m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_CXX
AC_PROG_CPP
AC_PROG_SED
AC_PROG_LN_S
AC_PROG_F77

LT_PREREQ([2.2])
LT_INIT([win32-dll])

AC_PROG_INSTALL
AC_PROG_MKDIR_P
AC_PROG_LN_S

AC_HEADER_STDC

AC_C_RESTRICT

AC_PATH_PROGS([STARPU_MS_LIB], [lib])
AC_ARG_VAR([STARPU_MS_LIB], [Path to Microsoft's Visual Studio `lib' tool])
AM_CONDITIONAL([STARPU_HAVE_MS_LIB], [test "x$STARPU_MS_LIB" != "x"])
case "$target" in
*-*-mingw*|*-*-cygwin*)
  starpu_windows=yes
  libext=a
  AC_DEFINE(STARPU_HAVE_WINDOWS, [], [Define this on windows.])
  ;;
esac
AM_CONDITIONAL([STARPU_HAVE_WINDOWS], [test "x$starpu_windows" = "xyes"])

# on Darwin, GCC targets i386 by default, so we don't have atomic ops
AC_CHECK_SIZEOF([void *])
SIZEOF_VOID_P=$ac_cv_sizeof_void_p
case $SIZEOF_VOID_P in
	4)
		case "$target" in
		i386-*darwin*) CFLAGS+=" -march=i686 " ;;
		esac
		STARPU_MS_LIB_ARCH=X86
		;;
	8)
		STARPU_MS_LIB_ARCH=X64
		;;
esac
AC_SUBST(STARPU_MS_LIB_ARCH)

# This will be useful for program which use CUDA (and .cubin files) which need
# some path to the CUDA code at runtime.
AC_DEFINE_UNQUOTED(STARPU_BUILD_DIR, "$PWD", [location of StarPU build directory])
AC_SUBST(STARPU_BUILD_DIR, $PWD)
case "${srcdir}" in
/*)  AC_DEFINE_UNQUOTED(STARPU_SRC_DIR, "$(eval echo ${srcdir})", [location of StarPU sources])
     AC_SUBST(STARPU_SRC_DIR, "$(eval echo ${srcdir})") ;;
*)   AC_DEFINE_UNQUOTED(STARPU_SRC_DIR, "$(eval echo $PWD/${srcdir})", [location of StarPU sources])
     AC_SUBST(STARPU_SRC_DIR, "$(eval echo $PWD/${srcdir})") ;;
esac


case "$target" in
*-*-mingw*|*-*-cygwin*)
    AC_ARG_ENABLE(native-winthreads, [AS_HELP_STRING([--enable-native-winthreads],
    				   [Use native windows threads instead of pthread])],
    				   enable_native_winthreads=$enableval, enable_native_winthreads=no)
    ;;
esac
if test x"$enable_native_winthreads" = xyes
then
    CPPFLAGS+=" -I$STARPU_SRC_DIR/include/pthread_win32 "
else
    AC_CHECK_LIB([pthread], [pthread_create])
fi

AC_COMPILE_IFELSE(
  [AC_LANG_PROGRAM([[
    #include <pthread.h>
  ]], [[ pthread_t t; pthread_create(&t, NULL, NULL, NULL); ]])],,
  AC_MSG_ERROR([pthread_create unavailable]))
AC_SEARCH_LIBS([sqrt],[m],,AC_MSG_ERROR([math library unavailable]))
AC_HAVE_LIBRARY([ws2_32])
AC_CHECK_FUNCS([sysconf])

AC_CHECK_FUNC([pthread_spin_lock], have_pthread_spin_lock=yes, have_pthread_spin_lock=no)
if test x$have_pthread_spin_lock = xyes; then
	AC_DEFINE(HAVE_PTHREAD_SPIN_LOCK,[],[pthread_spin_lock is available])
fi

# yes, that's non portable, but it's still better than sched_setaffinity
AC_CHECK_FUNCS(pthread_setaffinity_np)

# There is no posix_memalign on Mac OS X, only memalign
AC_CHECK_FUNCS([posix_memalign], [AC_DEFINE([STARPU_HAVE_POSIX_MEMALIGN], [1], [Define to 1 if you have the `posix_memalign' function.])])
AC_CHECK_FUNCS([memalign], [AC_DEFINE([STARPU_HAVE_MEMALIGN], [1], [Define to 1 if you have the `memalign' function.])])

# Some systems don't have drand48
AC_CHECK_FUNC([drand48], have_drand48=yes, have_drand48=no)
AC_CHECK_FUNC([erand48_r], have_erand48_r=yes, have_erand48_r=no)
# Maybe the user still does not want to use the provided drand48
AC_ARG_ENABLE(default-drand48, [AS_HELP_STRING([--disable-default-drand48],
				   [Do not use the default version of drand48])],
				   enable_default_drand48=$enableval, enable_default_drand48=yes)
if test x$have_drand48 = xyes -a x$enable_default_drand48 = xyes ; then
   AC_DEFINE([STARPU_USE_DRAND48], [1], [Define to 1 if drandr48 is available and should be used])
fi
if test x$have_erand48_r = xyes ; then
   AC_DEFINE([STARPU_USE_ERAND48_R], [1], [Define to 1 if erandr48_r is available])
fi

# Some systems do not define strerror_r
AC_CHECK_FUNC([strerror_r], [AC_DEFINE([STARPU_HAVE_STRERROR_R], [1], [Define to 1 if the function strerro_r is available.])])

# Some systems may not define setenv
AC_CHECK_FUNC([setenv], [AC_DEFINE([STARPU_HAVE_SETENV], [1], [Define to 1 if the function setenv is available.])])

# Some systems do not define unsetenv
AC_CHECK_FUNC([unsetenv], [AC_DEFINE([STARPU_HAVE_UNSETENV], [1], [Define to 1 if the function unsetenv is available.])])

# Some systems do not define nearbyintf...
AC_CHECK_FUNC([nearbyintf], [AC_DEFINE([STARPU_HAVE_NEARBYINTF], [1], [Define to 1 if the function nearbyintf is available.])])

# ... but they may define rintf.
AC_CHECK_FUNC([rintf], [AC_DEFINE([STARPU_HAVE_RINTF], [1], [Define to 1 if the function rintf is available.])])

# Define slow machine
AC_ARG_ENABLE(slow-machine, [AS_HELP_STRING([--enable-slow-machine],
				   [Lower default values for the testcases run by make check])],
				   enable_slow_machine=$enableval, enable_slow_machine=false)
if  test x$enable_slow_machine = xyes; then
	AC_DEFINE(STARPU_SLOW_MACHINE, [1], [enable slow machine])
fi

AC_CHECK_HEADERS([malloc.h], [AC_DEFINE([STARPU_HAVE_MALLOC_H], [1], [Define to 1 if you have the <malloc.h> header file.])])

AC_CHECK_HEADERS([valgrind/valgrind.h], [AC_DEFINE([STARPU_HAVE_VALGRIND_H], [1], [Define to 1 if you have the <valgrind/valgrind.h> header file.])])

# This defines HAVE_SYNC_VAL_COMPARE_AND_SWAP
STARPU_CHECK_SYNC_VAL_COMPARE_AND_SWAP

# This defines HAVE_SYNC_BOOL_COMPARE_AND_SWAP
STARPU_CHECK_SYNC_BOOL_COMPARE_AND_SWAP

# This defines HAVE_SYNC_FETCH_AND_ADD
STARPU_CHECK_SYNC_FETCH_AND_ADD

# This defines HAVE_SYNC_FETCH_AND_OR
STARPU_CHECK_SYNC_FETCH_AND_OR

# This defines HAVE_SYNC_LOCK_TEST_AND_SET
STARPU_CHECK_SYNC_LOCK_TEST_AND_SET

# This defines HAVE_SYNC_SYNCHRONIZE
STARPU_CHECK_SYNC_SYNCHRONIZE

CPPFLAGS="${CPPFLAGS} -D_GNU_SOURCE "

STARPU_SEARCH_LIBS([LIBNUMA],[set_mempolicy],[numa],[enable_libnuma=yes],[enable_libnuma=no])
AC_MSG_CHECKING(whether libnuma is available)
AC_MSG_RESULT($enable_libnuma)
if test x$enable_libnuma = xyes; then
	AC_DEFINE(STARPU_HAVE_LIBNUMA,[],[libnuma is available])
fi

###############################################################################
#                                                                             #
#                                 CPUs settings                               #
#                                                                             #
###############################################################################

AC_MSG_CHECKING(maximum number of CPUs)
AC_ARG_ENABLE(maxcpus, [AS_HELP_STRING([--enable-maxcpus=<number>],
			[maximum number of CPUs])],
			maxcpus=$enableval, maxcpus=64)
AC_MSG_RESULT($maxcpus)
AC_DEFINE_UNQUOTED(STARPU_MAXCPUS, [$maxcpus], [Maximum number of CPUs supported])

AC_MSG_CHECKING(whether CPUs should be used)
AC_ARG_ENABLE(cpu, [AS_HELP_STRING([--disable-cpu],
			[do not use the CPU(s)])],
			enable_cpu=$enableval, enable_cpu=yes)
AC_MSG_RESULT($enable_cpu)
AC_SUBST(STARPU_USE_CPU, $enable_cpu)
AM_CONDITIONAL(STARPU_USE_CPU, test x$enable_cpu = xyes)

if test x$enable_cpu = xyes; then
	AC_DEFINE(STARPU_USE_CPU, [1], [CPU driver is activated])
fi

# How many parallel worker can we support ?
nmaxcombinedworkers=`expr 2 \* $maxcpus`
AC_DEFINE_UNQUOTED(STARPU_NMAX_COMBINEDWORKERS,
	[$nmaxcombinedworkers], [Maximum number of worker combinations])

###############################################################################
#                                                                             #
#                                 CUDA settings                               #
#                                                                             #
###############################################################################

AC_MSG_CHECKING(maximum number of CUDA devices)
AC_ARG_ENABLE(maxcudadev, [AS_HELP_STRING([--enable-maxcudadev=<number>],
			[maximum number of CUDA devices])],
			nmaxcudadev=$enableval, nmaxcudadev=4)
AC_MSG_RESULT($nmaxcudadev)
AC_DEFINE_UNQUOTED(STARPU_MAXCUDADEVS, [$nmaxcudadev],
		[maximum number of CUDA devices])

AC_ARG_ENABLE(cuda, [AS_HELP_STRING([--disable-cuda],
		[do not use CUDA device(s)])],, [enable_cuda=maybe])

#AC_MSG_CHECKING(whether CUDA is available)
AC_ARG_WITH(cuda-dir,
	[AS_HELP_STRING([--with-cuda-dir=<path>],
	[specify CUDA installation directory])],
	[
		cuda_dir="$withval"
		# in case this was not explicit yet
		enable_cuda=yes
	], cuda_dir=no)

AC_ARG_WITH(cuda-include-dir,
	[AS_HELP_STRING([--with-cuda-include-dir=<path>],
	[specify where CUDA headers are installed])],
	[
		cuda_include_dir="$withval"
		# in case this was not explicit yet
		enable_cuda=yes
	], [cuda_include_dir=no])

AC_ARG_WITH(cuda-lib-dir,
	[AS_HELP_STRING([--with-cuda-lib-dir=<path>],
	[specify where CUDA libraries are installed])],
	[
		cuda_lib_dir="$withval"
		# in case this was not explicit yet
		enable_cuda=yes
	], [cuda_lib_dir=no])

AC_DEFUN([STARPU_CHECK_CUDA_L],
[
    __cuda_L=$1
    SAVED_LDFLAGS="${LDFLAGS}"
    STARPU_CUDA_LDFLAGS="${__cuda_L}"
    AC_MSG_CHECKING(whether CUDA is available with: $__cuda_L)
    AC_MSG_RESULT()
    LDFLAGS="${SAVED_LDFLAGS} ${__cuda_L}"
    AC_HAVE_LIBRARY([cuda],[have_valid_cuda=yes],[have_valid_cuda=no])
    unset ac_cv_lib_cuda_main
    if test "$have_valid_cuda" = "yes" ; then
	AC_HAVE_LIBRARY([cudart],[have_valid_cuda=yes],[have_valid_cuda=no])
	unset ac_cv_lib_cudart_main
	if test "$have_valid_cuda" = yes ; then
	    STARPU_CUDA_LDFLAGS="$STARPU_CUDA_LDFLAGS -lcudart"
	    LDFLAGS="${SAVED_LDFLAGS} ${STARPU_CUDA_LDFLAGS}"
	    # we also check that CUBLAS is available
	    AC_HAVE_LIBRARY([cublas],[have_valid_cuda=yes],[have_valid_cuda=no])
	    unset ac_cv_lib_cublas_main
	    if test "$have_valid_cuda" = "yes" ; then
		STARPU_CUDA_LDFLAGS="$STARPU_CUDA_LDFLAGS -lcublas"
	    fi
	fi
    fi
    LDFLAGS="${SAVED_LDFLAGS}"
])
AC_DEFUN([STARPU_CHECK_CUDA],
[
    __cuda_dir=$1
    __cuda_include_dir=$2
    __cuda_lib_dir=$3

    if test -z "$__cuda_lib_dir" ; then
	__cuda_lib_dir=no
    fi
    if test -z "$__cuda_include_dir" ; then
	__cuda_include_dir=no
    fi
    if test -z "$__cuda_dir" ; then
	__cuda_dir=no
    fi

    if test "$__cuda_dir" != "no" ; then
	AC_MSG_CHECKING(whether CUDA is available in $__cuda_dir, $__cuda_include_dir and $__cuda_lib_dir)
    else
	AC_MSG_CHECKING(whether CUDA is available)
    fi
    AC_MSG_RESULT()

    if test "$__cuda_include_dir" = "no" -a "$__cuda_dir" != "no" ; then
        __cuda_include_dir="$__cuda_dir/include"
    fi

    SAVED_CPPFLAGS="$CPPFLAGS"
    have_valid_cuda=no

    if test "$__cuda_include_dir" != "no" ; then
        CPPFLAGS="${CPPFLAGS} -I$__cuda_include_dir"
    fi

    AC_CHECK_HEADER([cuda.h],[have_valid_cuda=yes],[have_valid_cuda=no])
    unset ac_cv_header_cuda_h

    if test "$have_valid_cuda" = "yes" ; then
	if test "$__cuda_lib_dir" != "no" ; then
	    STARPU_CHECK_CUDA_L("-L${__cuda_lib_dir}")
	else
	    if test "$__cuda_dir" != "no" ; then
		for __cuda_libdir in lib64 lib lib/x64 lib/Win32 ; do
		    STARPU_CHECK_CUDA_L("-L${__cuda_dir}/${__cuda_libdir}")
		    if test "$have_valid_cuda" = yes ; then
			break
		    fi
		done
	    else
		STARPU_CHECK_CUDA_L("")
	    fi
	fi
    fi

    if test "$have_valid_cuda" = "no" ; then
	CPPFLAGS="${SAVED_CPPFLAGS}"
	unset STARPU_CUDA_LDFLAGS
    else
	if test "$__cuda_include_dir" != "no"; then
	    STARPU_CUDA_CPPFLAGS="-I$__cuda_include_dir"
	    NVCCFLAGS="${NVCCFLAGS} -I$__cuda_include_dir"
	fi
    fi
])

if test x$enable_cuda = xyes -o x$enable_cuda = xmaybe; then
    STARPU_CHECK_CUDA("$cuda_dir", "$cuda_include_dir", "$cuda_lib_dir")
    if test "$have_valid_cuda" = "no" ; then
	STARPU_CHECK_CUDA("$CUDA_ROOT", "$CUDA_PATH", "$CUDA_INC_PATH", "$CUDA_LIB_PATH")
    fi
    if test "$have_valid_cuda" = "no" ; then
	for f in "/usr/local/cuda" "/c/cuda" "/cygdrive/c/cuda" "/opt/cuda" "$CUDA_ROOT" "$CUDA_PATH" "$CUDA_INC_PATH/.." "$CUDA_INSTALL_PATH" "$CUDA_TOOLKIT"; do
	    if test -n "$f" ; then
		STARPU_CHECK_CUDA("$f", "no", "no")
		if test "$have_valid_cuda" = "yes" ; then
		    break
		fi
	    fi
	done
    fi

    # Check cuda is compatible with the C compiler
    AC_MSG_CHECKING(whether CUDA is working)
    if test "$have_valid_cuda" = "yes" ; then
        SAVED_CPPFLAGS="${CPPFLAGS}"
        CPPFLAGS="${CPPFLAGS} ${STARPU_CUDA_CPPFLAGS}"
	SAVED_LDFLAGS="${LDFLAGS}"
	LDFLAGS="${LDFLAGS} ${STARPU_CUDA_LDFLAGS} -lcuda"
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
		[[#include <cuda.h>]],
		[[]]
		)],
	    [
	      AC_RUN_IFELSE([AC_LANG_PROGRAM(
	        [[#include <cuda.h>]],
		[[]]
		)],
		[have_valid_cuda="yes"],
		[
	          AC_MSG_RESULT([CUDA found and can be compiled, but compiled application can not be run, is the CUDA path missing in LD_LIBRARY_PATH?])
	          have_valid_cuda="no"
		])
	    ],
	    [
	    AC_MSG_ERROR([CUDA found, but cuda.h could not be compiled])
	    have_valid_cuda="no"
	    ]
	)
        CPPFLAGS="${SAVED_CPPFLAGS}"
	LDFLAGS="${SAVED_LDFLAGS}"
    fi
    AC_MSG_RESULT($have_valid_cuda)

    # in case CUDA was explicitely required, but is not available, this is an error
    if test x$enable_cuda = xyes -a x$have_valid_cuda = xno; then
	AC_MSG_ERROR([cannot find CUDA])
    fi
    # now we enable CUDA if and only if a proper setup is available
    enable_cuda=$have_valid_cuda
fi

if test x$enable_cuda = xyes; then
        AC_PATH_PROG([NVCC], [nvcc], [not-found],
	  [$cuda_dir/bin:$PATH:/usr/local/cuda/bin:/usr/bin:/bin])
	if test "x$NVCC" = "xnot-found"; then
	   AC_MSG_WARN(['nvcc' not found, disabling CUDA])
	   enable_cuda=no
	fi
fi

AC_MSG_CHECKING(whether CUDA should be used)
AC_MSG_RESULT($enable_cuda)
AC_SUBST(STARPU_USE_CUDA, $enable_cuda)
AM_CONDITIONAL(STARPU_USE_CUDA, test x$enable_cuda = xyes)
if test x$enable_cuda = xyes; then
	AC_DEFINE(STARPU_USE_CUDA, [1], [CUDA support is activated])

	# On Darwin, the libstdc++ dependency is not automatically added by nvcc
#	case "$target" in
#		*-*darwin*) AC_HAVE_LIBRARY([stdc++], []) ;;
#		#*-*darwin*) AC_HAVE_LIBRARY([stdc++], [STARPU_CUDA_LDFLAGS="$STARPU_CUDA_LDFLAGS -lstdc++"]) ;;
#	esac
	STARPU_CUDA_LDFLAGS="$STARPU_CUDA_LDFLAGS -lcuda"
	STARPU_CUFFT_LDFLAGS="-lcufft"

        if test "$F77" = "gfortran" ; then
            STARPU_CUDA_FORTRAN_LDFLAGS="-lgfortran"
            AC_SUBST(STARPU_CUDA_FORTRAN_LDFLAGS)
        fi

	#in case this is a 64bit setup, we tell nvcc to use a -m64 flag
	if test x$SIZEOF_VOID_P = x8; then
		NVCCFLAGS="${NVCCFLAGS} -m64"
		AC_SUBST(NVCCFLAGS)
	fi

	AC_CHECK_HEADERS([cuda_gl_interop.h])
fi

have_magma=no
if test x$enable_cuda = xyes; then
	PKG_CHECK_MODULES([MAGMA],  [magma], [
	AC_DEFINE([STARPU_HAVE_MAGMA], [1], [Define to 1 if you have the MAGMA library.])
	AC_SUBST([STARPU_HAVE_MAGMA], [1])
	have_magma=yes
], [:])
fi
AM_CONDITIONAL(STARPU_HAVE_MAGMA, [test x$have_magma = xyes])
AC_MSG_CHECKING(whether MAGMA should be used)
AC_MSG_RESULT($have_magma)

# cufftDoubleComplex may not be available on an old CUDA setup
AC_CHECK_TYPE(cufftDoubleComplex,
	[have_cufftdoublecomplex=yes],
	[have_cufftdoublecomplex=no], [#include <cufft.h>])
AM_CONDITIONAL(STARPU_HAVE_CUFFTDOUBLECOMPLEX, test x$have_cufftdoublecomplex = xyes)
if test x$have_cufftdoublecomplex = xyes; then
	AC_DEFINE(STARPU_HAVE_CUFFTDOUBLECOMPLEX, [1], [cufftDoubleComplex is available])
fi

# The CURAND library is only available since CUDA 3.2
have_curand=$enable_cuda
if test x$enable_cuda = xyes; then
        SAVED_LDFLAGS="${LDFLAGS}"
        LDFLAGS="${LDFLAGS} ${STARPU_CUDA_LDFLAGS}"
	AC_HAVE_LIBRARY([curand],[have_curand=yes],[have_curand=no])
        LDFLAGS="${SAVED_LDFLAGS}"
fi
AC_MSG_CHECKING(whether CURAND is available)
AC_MSG_RESULT($have_curand)
if test x$have_curand = xyes; then
    AC_DEFINE(STARPU_HAVE_CURAND,[1], [CURAND is available])
    STARPU_CURAND_LDFLAGS="$STARPU_CURAND_LDFLAGS -lcurand"
    AC_SUBST(STARPU_CURAND_LDFLAGS)
fi

# Peer transfers are only supported since CUDA 4.0
# Disable them if user explicity wants to disable them
AC_ARG_ENABLE(cuda_memcpy_peer, [AS_HELP_STRING([--disable-cuda-memcpy-peer], [do not allow peer transfers when using CUDA 4.0])],, [enable_cuda_memcpy_peer=yes])
have_cuda_memcpy_peer=no
if test x$enable_cuda_memcpy_peer = xyes -a x$enable_cuda = xyes ; then
    SAVED_LDFLAGS="${LDFLAGS}"
    LDFLAGS="${LDFLAGS} ${STARPU_CUDA_LDFLAGS}"
    AC_CHECK_FUNC([cudaMemcpyPeer], have_cuda_memcpy_peer=yes, have_cuda_memcpy_peer=no)
    LDFLAGS="${SAVED_LDFLAGS}"
fi
if test x$have_cuda_memcpy_peer = xyes; then
    AC_DEFINE(HAVE_CUDA_MEMCPY_PEER,[],[Peer transfers are supported in CUDA])
fi

if test x$enable_cuda = xyes; then
    if test x$starpu_windows != xyes ; then
	STARPU_CUDA_LDFLAGS="$STARPU_CUDA_LDFLAGS -lstdc++"
    fi
    AC_SUBST(STARPU_CUDA_LDFLAGS)
    AC_SUBST(STARPU_CUFFT_LDFLAGS)
    AC_SUBST(STARPU_CUDA_CPPFLAGS)
fi

AC_ARG_VAR([NVCCFLAGS], [CUDA compiler flags])

###############################################################################
#                                                                             #
#                                 OpenCL settings                             #
#                                                                             #
###############################################################################

AC_MSG_CHECKING(maximum number of OpenCL devices)
AC_ARG_ENABLE(maxopencldev, [AS_HELP_STRING([--enable-maxopencldev=<number>],
			[maximum number of OPENCL devices])],
			nmaxopencldev=$enableval, nmaxopencldev=8)
AC_MSG_RESULT($nmaxopencldev)
AC_DEFINE_UNQUOTED(STARPU_MAXOPENCLDEVS, [$nmaxopencldev],
		[maximum number of OPENCL devices])
AC_ARG_ENABLE(opencl, [AS_HELP_STRING([--disable-opencl],
		[do not use OpenCL device(s)])],, [enable_opencl=maybe])

AC_DEFUN([STARPU_CHECK_OPENCL],
[
    __opencl_dir=$1
    __opencl_include_dir=$2
    __opencl_lib_dir=$3

    if test "$__opencl_dir" != "no" ; then
	AC_MSG_CHECKING(whether OpenCL is available in $__opencl_dir $__opencl_include_dir and $__opencl_lib_dir)
    else
	AC_MSG_CHECKING(whether OpenCL is available)
    fi
    AC_MSG_RESULT()

    if test "$__opencl_include_dir" = "no" -a "$__opencl_dir" != "no" ; then
        __opencl_include_dir="$__opencl_dir/include"
    fi

    SAVED_CPPFLAGS="$CPPFLAGS"
    SAVED_LDFLAGS="${LDFLAGS}"

    if test "$__opencl_include_dir" != "no" ; then
        CPPFLAGS="${CPPFLAGS} -I$__opencl_include_dir"
    fi
    AC_CHECK_HEADER([CL/cl.h],[have_valid_opencl=yes],[have_valid_opencl=no])
    unset ac_cv_header_CL_cl_h

    if test "$have_valid_opencl" = "yes" ; then
	if test "$__opencl_lib_dir" != "no"; then
	    LDFLAGS="${SAVED_LDFLAGS} -L$__opencl_lib_dir"
	    AC_HAVE_LIBRARY([OpenCL],[have_valid_opencl=yes],[have_valid_opencl=no])
	    unset ac_cv_lib_OpenCL_main
	else
	    AC_MSG_CHECKING(whether OpenCL is available in $__opencl_dir)
	    AC_MSG_RESULT()
	    AC_HAVE_LIBRARY([OpenCL],[have_valid_opencl=yes],[have_valid_opencl=no])
	    unset ac_cv_lib_OpenCL_main
	    if test "$have_valid_opencl" = "no" -a "$__opencl_dir" != "no" ; then
		for __cuda_libdir in lib64 lib lib/x86 lib/Win32 ; do
		    __opencl_lib_dir="$__opencl_dir/$__cuda_libdir"
		    AC_MSG_CHECKING(whether OpenCL is available in $__opencl_dir and $__opencl_lib_dir)
		    AC_MSG_RESULT()
		    LDFLAGS="${SAVED_LDFLAGS} -L$__opencl_lib_dir"
		    AC_HAVE_LIBRARY([OpenCL],[have_valid_opencl=yes],[have_valid_opencl=no])
		    unset ac_cv_lib_OpenCL_main
		    if test "$have_valid_opencl" = yes ; then
			break
		    fi
		done
	    else
		LDFLAGS="${SAVED_LDFLAGS}"
		AC_HAVE_LIBRARY([OpenCL],[have_valid_opencl=yes],[have_valid_opencl=no])
		unset ac_cv_lib_OpenCL_main
	    fi
        fi
    fi

    if test "$have_valid_opencl" = "yes" -a "$__opencl_include_dir" != "no"; then
        STARPU_OPENCL_CPPFLAGS="-I$__opencl_include_dir"
	AC_CHECK_HEADERS([CL/cl_ext.h])
    fi

    CPPFLAGS="${SAVED_CPPFLAGS}"
    LDFLAGS="${SAVED_LDFLAGS}"

    if test "$have_valid_opencl" = "yes" ; then
        if test "$__opencl_lib_dir" != "no"; then
            STARPU_OPENCL_LDFLAGS="-L$__opencl_lib_dir"
        fi
        STARPU_OPENCL_LDFLAGS="${STARPU_OPENCL_LDFLAGS} -lOpenCL"
    fi

])

#AC_MSG_CHECKING(whether OpenCL is available)
AC_ARG_WITH(opencl-dir,
	[AS_HELP_STRING([--with-opencl-dir=<path>],
	[specify OpenCL installation directory])],
	[
		opencl_dir="$withval"
		# in case this was not explicit yet
		enable_opencl=yes
	], opencl_dir=no)

AC_ARG_WITH(opencl-include-dir,
	[AS_HELP_STRING([--with-opencl-include-dir=<path>],
	[specify where OpenCL headers are installed])],
	[
		opencl_include_dir="$withval"
		# in case this was not explicit yet
		enable_opencl=yes
	], [opencl_include_dir=no])

AC_ARG_WITH(opencl-lib-dir,
	[AS_HELP_STRING([--with-opencl-lib-dir=<path>],
	[specify where OpenCL libraries are installed])],
	[
		opencl_lib_dir="$withval"
		# in case this was not explicit yet
		enable_opencl=yes
	], [opencl_lib_dir=no])

AC_DEFUN([STARPU_LOOK_FOR_OPENCL],
[
    	if test "x$has_opencl_being_checked" != "xyes" ; then
    	    STARPU_CHECK_OPENCL("$opencl_dir", "$opencl_include_dir", "$opencl_lib_dir")
	    if test "$have_valid_opencl" = "no" ; then
            	for f in "/usr/local/cuda" "/c/cuda" "/cygdrive/c/cuda" "/opt/cuda" "$CUDA_ROOT" "$CUDA_PATH" "$CUDA_INC_PATH/.." "$CUDA_INSTALL_PATH" "$CUDA_TOOLKIT"; do
		    if test -n "$f" ; then
    			STARPU_CHECK_OPENCL("$f", "no", "no")
			if test "$have_valid_opencl" = "yes" ; then
			    break
			fi
		    fi
		done
	    fi
	    has_opencl_being_checked=yes
	fi
])

if test x$enable_opencl = xyes -o x$enable_opencl = xmaybe; then
	STARPU_LOOK_FOR_OPENCL()
	# in case OpenCL was explicitely required, but is not available, this is an error
	if test x$enable_opencl = xyes -a x$have_valid_opencl = xno; then
	    AC_MSG_ERROR([cannot find OpenCL])
	fi

	# now we enable OpenCL if and only if a proper setup is available
	enable_opencl=$have_valid_opencl
fi

AC_MSG_CHECKING(whether OpenCL should be used)
AC_MSG_RESULT($enable_opencl)
AC_SUBST(STARPU_USE_OPENCL, $enable_opencl)
AM_CONDITIONAL(STARPU_USE_OPENCL, test x$enable_opencl = xyes)
if test x$enable_opencl = xyes ; then
	AC_DEFINE(STARPU_USE_OPENCL, [1], [OpenCL support is activated])
	STARPU_OPENCL_CPPFLAGS="${STARPU_OPENCL_CPPFLAGS} -DSTARPU_OPENCL_DATADIR=${datarootdir}/starpu/opencl"
        AC_SUBST(STARPU_OPENCL_DATAdir, "$(eval echo ${datarootdir}/starpu/opencl/examples)")
        AC_SUBST(STARPU_OPENCL_CPPFLAGS)
        AC_SUBST(STARPU_OPENCL_LDFLAGS)
fi

###############################################################################
#                                                                             #
# General GPU settings                                                        #
#                                                                             #
###############################################################################
AC_MSG_CHECKING(whether asynchronous copy should be disabled)
AC_ARG_ENABLE(asynchronous-copy, [AS_HELP_STRING([--disable-asynchronous-copy],
			[disable asynchronous copy between CPU and GPU])],
			enable_asynchronous_copy=$enableval, enable_asynchronous_copy=yes)
disable_asynchronous_copy=no
if test x$enable_asynchronous_copy = xno ; then
   disable_asynchronous_copy=yes
fi
AC_MSG_RESULT($disable_asynchronous_copy)
if test x$disable_asynchronous_copy = xyes ; then
   AC_DEFINE([STARPU_DISABLE_ASYNCHRONOUS_COPY], [1], [Define to 1 to disable asynchronous copy between CPU and GPU devices])
fi

AC_MSG_CHECKING(whether asynchronous CUDA copy should be disabled)
AC_ARG_ENABLE(asynchronous-cudacopy, [AS_HELP_STRING([--disable-asynchronous-cuda-copy],
			[disable asynchronous copy between CPU and CUDA devices])],
			enable_asynchronous_cuda_copy=$enableval, enable_asynchronous_cuda_copy=yes)
disable_asynchronous_cuda_copy=no
if test x$enable_asynchronous_cuda_copy = xno ; then
   disable_asynchronous_cuda_copy=yes
fi
AC_MSG_RESULT($disable_asynchronous_cuda_copy)
if test x$disable_asynchronous_cuda_copy = xyes ; then
   AC_DEFINE([STARPU_DISABLE_ASYNCHRONOUS_CUDA_COPY], [1], [Define to 1 to disable asynchronous copy between CPU and CUDA devices])
fi

AC_MSG_CHECKING(whether asynchronous OpenCL copy should be disabled)
AC_ARG_ENABLE(asynchronous-openclcopy, [AS_HELP_STRING([--disable-asynchronous-opencl-copy],
			[disable asynchronous copy between CPU and OPENCL devices])],
			enable_asynchronous_opencl_copy=$enableval, enable_asynchronous_opencl_copy=yes)
disable_asynchronous_opencl_copy=no
if test x$enable_asynchronous_opencl_copy = xno ; then
   disable_asynchronous_opencl_copy=yes
fi
AC_MSG_RESULT($disable_asynchronous_opencl_copy)
if test x$disable_asynchronous_opencl_copy = xyes ; then
   AC_DEFINE([STARPU_DISABLE_ASYNCHRONOUS_OPENCL_COPY], [1], [Define to 1 to disable asynchronous copy between CPU and OpenCL devices])
fi


###############################################################################
#                                                                             #
#                                 Cell settings                               #
#                                                                             #
###############################################################################

#TODO fix the default dir
AC_ARG_ENABLE(gordon, [AS_HELP_STRING([--enable-gordon],
			[use Cell SPUs])],, enable_gordon=maybe)

if test x$enable_gordon = xyes -o x$enable_gordon = xmaybe; then

	AC_ARG_WITH(gordon-dir, [AS_HELP_STRING([--with-gordon-dir=<path>],
			[specify Gordon installation directory (default is /usr/local/)])],
			[
				gordon_dir="$withval"
				enable_gordon=yes
			], gordon_dir=/usr/local/)

	# do we have a valid Gordon setup ?
	have_valid_gordon=yes

	# can we use dynamic code loading facilities ?
	AC_CHECK_LIB(elf, elf_memory,, [have_valid_gordon=no])

	AC_CHECK_LIB(spe2, spe_context_create,,[have_valid_gordon=no])
	AC_CHECK_FUNC(spe_in_mbox_write, [], [have_valid_gordon=no])

	PKG_PROG_PKG_CONFIG
	if test -d "$gordon_dir"; then
		PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:$gordon_dir"
	fi
	AC_SUBST(PKG_CONFIG_PATH)
	PKG_CHECK_MODULES([GORDON], [libgordon], [], have_valid_gordon=no)

	CPPFLAGS="${CPPFLAGS} ${GORDON_CFLAGS}"
	LIBS="${LIBS} ${GORDON_LIBS}"

	# AC_CHECK_FUNC(gordon_init, [gordon], [have_valid_gordon=no])

	# in case Gordon was explicitely required, but is not available, this is an error
	if test x$enable_gordon = xyes -a x$have_valid_gordon = xno; then
		AC_MSG_ERROR([cannot find Gordon])
	fi


	# now we enable Gordon if and only if a proper setup is available
	enable_gordon=$have_valid_gordon
	AC_DEFINE(STARPU_MAXGORDONDEVS, [1], [maximum number of GORDON devices])
fi

AC_MSG_CHECKING(whether GORDON should be used)
AC_MSG_RESULT($enable_gordon)
AC_SUBST(STARPU_USE_GORDON, $enable_gordon)
AM_CONDITIONAL(STARPU_USE_GORDON, test x$enable_gordon = xyes)

if test x$enable_gordon = xyes; then
	AC_DEFINE(STARPU_USE_GORDON, [1], [Cell support is enabled])
	GORDON_REQUIRES=gordon
fi
AC_SUBST(GORDON_REQUIRES)

AC_MSG_CHECKING(whether blocking drivers should be disabled)
AC_ARG_ENABLE(blocking-drivers, [AS_HELP_STRING([--disable-blocking-drivers], [disable blocking drivers])],
				enable_blocking=$enableval, enable_blocking=$enable_gordon)
AC_MSG_RESULT($enable_blocking)

if test x$enable_blocking = xno; then
	AC_DEFINE(STARPU_NON_BLOCKING_DRIVERS, [1], [drivers must progress])
fi


###############################################################################
#                                                                             #
#                   Debug and Performance analysis tools                      #
#                                                                             #
###############################################################################

AC_MSG_CHECKING(whether debug mode should be enabled)
AC_ARG_ENABLE(debug, [AS_HELP_STRING([--enable-debug], [enable debug mode])],
			enable_debug=$enableval, enable_debug=no)
AC_MSG_RESULT($enable_debug)

if test x$enable_debug = xyes; then
	CFLAGS="$CFLAGS -O0"
	AC_DEFINE(STARPU_SPINLOCK_CHECK, [1], [check spinlock use])
else
	CFLAGS="-O3 $CFLAGS"
fi
CFLAGS+=" -gdwarf-2 -g3 "

AC_MSG_CHECKING(whether extra checks should be performed)
AC_ARG_ENABLE(fast, [AS_HELP_STRING([--enable-fast],
			[do not enforce assertions])],
			enable_fast=$enableval, enable_fast=no)
AC_MSG_RESULT($enable_fast)
if test x$enable_fast = xyes; then
	AC_DEFINE(STARPU_NO_ASSERT, [1], [disable assertions])
fi

AC_MSG_CHECKING(whether memory status should be displayed)
AC_ARG_ENABLE(memory-status, [AS_HELP_STRING([--enable-memory-status],
			     [display memory status at the end of execution])],
			     enable_memory_status=$enableval, enable_memory_status=no)
AC_MSG_RESULT($enable_memory_status)
if test x$enable_memory_status = xyes; then
        AC_DEFINE(STARPU_MEMORY_STATUS, [1], [display memory status])
fi


AC_MSG_CHECKING(whether debug messages should be displayed)
AC_ARG_ENABLE(verbose, [AS_HELP_STRING([--enable-verbose],
			[display verbose debug messages])],
			enable_verbose=$enableval, enable_verbose=no)
AC_MSG_RESULT($enable_verbose)
if test x$enable_verbose = xyes; then
	AC_DEFINE(STARPU_VERBOSE, [1], [display verbose debug messages])
fi


AC_MSG_CHECKING(whether coverage testing should be enabled)
AC_ARG_ENABLE(coverage, [AS_HELP_STRING([--enable-coverage],
			[enable coverage checking])],
			enable_coverage=$enableval, enable_coverage=no)
AC_MSG_RESULT($enable_coverage)
AC_SUBST(COVERAGE, $enable_coverage)
AM_CONDITIONAL(STARPU_COVERAGE_ENABLED, [test "x$enable_coverage" = "xyes"])
if test x$enable_coverage = xyes; then
	CFLAGS="${CFLAGS} --coverage"
	LDFLAGS="${LDFLAGS} --coverage"
fi


# shall we use FxT to generate trace of the execution ?
AC_MSG_CHECKING(whether FxT traces should be generated)
AC_ARG_WITH(fxt, [AS_HELP_STRING([--with-fxt[=<dir>]], [generate fxt traces])],
	[
		if test x$withval != xno; then
			use_fxt=yes
			if test x$withval = xyes; then
				AC_MSG_RESULT(yes)
				use_fxt_from_system=yes
			else
				# use specified path
				# TODO check if the dir is actually containing FxT
				use_fxt_from_system=no
				fxtdir=$withval
				AC_MSG_RESULT(yes using $fxtdir)
				AC_SUBST(FXTDIR, $fxtdir)
			fi
		else
			use_fxt=no
			AC_MSG_RESULT(no)
		fi
	],
	[
		use_fxt=no
		AC_MSG_RESULT(no)
	])
AC_SUBST(STARPU_USE_FXT, $use_fxt)
AM_CONDITIONAL(STARPU_USE_FXT, test x$use_fxt = xyes)

if test x$use_fxt = xyes; then
	AC_DEFINE(STARPU_USE_FXT, [1], [enable FxT traces])
	AC_DEFINE(CONFIG_FUT, [1], [enable FUT traces])

	if test x$use_fxt_from_system = xno; then
		FXT_CFLAGS="-I$fxtdir/include/ "
		FXT_LDFLAGS="-L$fxtdir/lib/"
		AC_ARG_VAR(FXT_LDFLAGS)
		FXT_LIBS="-lfxt"
	else
	    PKG_CHECK_MODULES([FXT],  [fxt])
	fi
	save_LIBS="$LIBS"
	LIBS="$LIBS $FXT_LIBS"
	save_LDFLAGS="$LDFLAGS"
	LDFLAGS="$LDFLAGS $FXT_LDFLAGS"
   	AC_CHECK_FUNCS([enable_fut_flush])
   	AC_CHECK_FUNCS([fut_set_filename])
	LDFLAGS="$save_LDFLAGS"
	LIBS="$save_LIBS"
	save_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS $FXT_CFLAGS"
	AC_CHECK_DECLS([enable_fut_flush])
	AC_CHECK_DECLS([fut_set_filename])
	CFLAGS="$save_CFLAGS"
fi

AC_MSG_CHECKING(whether performance debugging should be enabled)
AC_ARG_ENABLE(perf-debug, [AS_HELP_STRING([--enable-perf-debug],
			[enable performance debugging through gprof])],
			enable_perf_debug=$enableval, enable_perf_debug=no)
AC_MSG_RESULT($enable_perf_debug)
AC_SUBST(STARPU_PERF_DEBUG, $enable_perf_debug)
if test x$enable_perf_debug = xyes; then
	AC_DEFINE(STARPU_PERF_DEBUG, [1], [enable performance debug])
	CPPFLAGS="${CPPFLAGS} -pg -fprofile-arcs "
	LDFLAGS="${LDFLAGS} -pg -fprofile-arcs "
fi

AC_MSG_CHECKING(whether performance model debugging should be enabled)
AC_ARG_ENABLE(model-debug, [AS_HELP_STRING([--enable-model-debug],
			[enable performance model debugging])],
			enable_model_debug=$enableval, enable_model_debug=no)
AC_MSG_RESULT($enable_model_debug)
if  test x$enable_model_debug = xyes; then
	AC_DEFINE(STARPU_MODEL_DEBUG, [1], [enable performance model debug])
fi

AC_MSG_CHECKING(whether statistics should be generated)
AC_ARG_ENABLE(stats, [AS_HELP_STRING([--enable-stats],
			[enable statistics])],
			enable_stats=$enableval, enable_stats=no)
AC_MSG_RESULT($enable_stats)
AC_SUBST(STATS, $enable_stats)
AC_SUBST(STARPU_DATA_STATS, $enable_stats)

if test x$enable_stats = xyes; then
        AC_DEFINE(STARPU_DATA_STATS, [1], [enable statistics])
fi

AC_CHECK_HEADERS([glpk.h])
STARPU_HAVE_LIBRARY(GLPK, [glpk])

###############################################################################
#                                                                             #
#                  Miscellaneous options for StarPU                           #
#                                                                             #
###############################################################################

AC_MSG_CHECKING(how many buffers can be manipulated per task)
AC_ARG_ENABLE(maxbuffers, [AS_HELP_STRING([--enable-maxbuffers=<nbuffers>],
			[maximum number of buffers per task])],
			nmaxbuffers=$enableval, nmaxbuffers=8)
AC_MSG_RESULT($nmaxbuffers)
AC_DEFINE_UNQUOTED(STARPU_NMAXBUFS, [$nmaxbuffers],
		[how many buffers can be manipulated per task])

# We have one memory node shared by all CPU workers, one node per GPU, and
# currently the Cell driver is using the same memory node as the CPU.
maxnodes=1
if test x$enable_cuda = xyes ; then
	# we could have used nmaxcudadev + 1, but this would certainly give an
	# odd number.
	maxnodes=`expr $maxnodes + $nmaxcudadev`
fi
if test x$enable_opencl = xyes ; then
	# we could have used nmaxcudadev + 1, but this would certainly give an
	# odd number.
	maxnodes=`expr $maxnodes + $nmaxopencldev`
fi
# todo: set maxnodes to the next power of 2 greater than maxnodes

AC_MSG_CHECKING(maximum number of memory nodes)
AC_MSG_RESULT($maxnodes)
AC_DEFINE_UNQUOTED(STARPU_MAXNODES, [$maxnodes],
		[maximum number of memory nodes])


AC_MSG_CHECKING(whether allocation cache should be used)
AC_ARG_ENABLE(allocation-cache, [AS_HELP_STRING([--enable-allocation-cache],
			[enable data allocation cache])],
			enable_allocation_cache=$enableval, enable_allocation_cache=no)
AC_MSG_RESULT($enable_allocation_cache)
if test x$enable_allocation_cache = xyes; then
	AC_DEFINE(STARPU_USE_ALLOCATION_CACHE, [1], [enable data allocation cache])
fi

AC_ARG_WITH(perf-model-dir, [AS_HELP_STRING([--with-perf-model-dir=<dir>], [specify where performance models shoulds be stored])],
	[
		if test x$withval = xno; then
			AC_MSG_ERROR(--without-perf-model-dir is not a valid option)
		fi

		perf_model_dir="$withval"
		have_explicit_perf_model_dir=yes
		AC_DEFINE_UNQUOTED(STARPU_PERF_MODEL_DIR, ["$perf_model_dir"], [performance models location])
	], [
		# by default, we put the performance models in
		# $HOME/.starpu/sampling/
		have_explicit_perf_model_dir=no
		perf_model_dir="\$HOME/.starpu/sampling/"
	]
	)
AC_MSG_CHECKING(using explicit performance model location)
AC_MSG_RESULT($have_explicit_perf_model_dir)

AC_MSG_CHECKING(performance models location)
AC_MSG_RESULT($perf_model_dir)

# On many multicore CPUs, clock cycles are not synchronized
AC_CHECK_LIB([rt], [clock_gettime])
AC_CHECK_FUNCS([clock_gettime])

# Compute the maximum number of workers (we round it to 16 for alignment
# purposes).
nmaxworkers=`expr 16 \* \( \( $maxcpus + $nmaxcudadev + $nmaxopencldev + 15 \) / 16 \) `
AC_MSG_CHECKING(Maximum number of workers)
AC_MSG_RESULT($nmaxworkers)
AC_DEFINE_UNQUOTED(STARPU_NMAXWORKERS, [$nmaxworkers], [Maximum number of workers])

# Computes the maximum number of implementations per arch
AC_MSG_CHECKING(maximum number of implementations)
AC_ARG_ENABLE(maximplementations, [AS_HELP_STRING([--enable-maximplementations=<number>],
		[maximum number of implementations])],
		maximplementations=$enableval, maximplementations=8)
AC_MSG_RESULT($maximplementations)
AC_DEFINE_UNQUOTED(STARPU_MAXIMPLEMENTATIONS, [$maximplementations],
		[maximum number of implementations])

###############################################################################
#                                                                             #
#                                    MPI                                      #
#                                                                             #
###############################################################################

AC_ARG_WITH(mpicc, [AS_HELP_STRING([--with-mpicc[=<path to mpicc>]],
			[Path of the mpicc compiler])],
	[
		if test x$withval = xyes; then
			AC_MSG_ERROR(--with-mpicc must be given a pathname)
		else
			mpicc_path=$withval
		fi
	],
	[
		# nothing was specified: default value is used
		AC_PATH_PROG(mpicc_path, mpicc, [no], [])
	])

# We test if the MPICC compiler exists
if test ! -x $mpicc_path; then
	#MPICC does not exists or is not executable
	AC_MSG_RESULT(The mpicc compiler is not valid)
	use_mpi=no
else
	use_mpi=yes
fi

AC_MSG_CHECKING(mpicc path)
AC_MSG_RESULT($mpicc_path)
AC_SUBST(MPICC, $mpicc_path)
if test x$use_mpi = xyes; then
	cc_or_mpicc=$mpicc_path
        # For some reason, libtool uses gcc instead of mpicc when linking
        # libstarpumpi.
        # On Darwin (and maybe other systems ?) the linker will fail (undefined
        # references to MPI_*). We manually add the required flags to fix this
        # issue.
        AC_SUBST(MPICC_LDFLAGS, `$mpicc_path --showme:link`)
else
	cc_or_mpicc=$CC
fi
AC_SUBST(CC_OR_MPICC, $cc_or_mpicc)

# Check if user wants to disable mpi cache
AC_ARG_ENABLE(mpi-cache, AC_HELP_STRING([--enable-mpi-cache],
			 [Enable MPI communication cache]),
			 enable_mpi_cache=$enableval, enable_mpi_cache=true)
if  test x$enable_mpi_cache = xtrue; then
    	AC_DEFINE(STARPU_MPI_CACHE, [1], [enable MPI communication cache])
fi

# If the user specifically asks for it, or if we are in a developer checkout, we enable mpi check
AC_ARG_ENABLE(mpi-check, AC_HELP_STRING([--enable-mpi-check], [Enable execution of MPI testcases]))
running_mpi_check=no
if test -d "$srcdir/.svn" ; then
    running_mpi_check=yes
fi
if test x$enable_mpi_check = xyes ; then
    running_mpi_check=yes
fi
if test x$enable_mpi_check = xno ; then
    running_mpi_check=no
fi

# Check if mpiexec is available
AC_ARG_WITH(mpiexec, [AS_HELP_STRING([--with-mpiexec[=<path to mpiexec>]],
			[Path of mpiexec])],
	[
		if test x$withval = xyes; then
			AC_MSG_ERROR(--with-mpiexec must be given a pathname)
		else
			mpiexec_path=$withval
		fi
	],
	[
		# nothing was specified: look in the path
		AC_PATH_PROG(mpiexec_path, mpiexec, [no], [$(dirname $mpicc_path):$PATH])
	])

AC_MSG_CHECKING(whether mpiexec is available)
AC_MSG_RESULT($mpiexec_path)

# We test if MPIEXEC exists
if test ! -x $mpiexec_path; then
	#MPIEXEC does not exists or is not executable
	AC_MSG_RESULT(The mpiexec script is not valid)
        running_mpi_check=no
        mpiexec_path=""
fi

AM_CONDITIONAL(STARPU_MPI_CHECK, test x$running_mpi_check = xyes)
if test x$use_mpi = xyes; then
        AC_MSG_CHECKING(whether MPI tests should be run)
        AC_MSG_RESULT($running_mpi_check)
	AC_SUBST(MPIEXEC,$mpiexec_path)
fi

AC_MSG_CHECKING(whether the StarPU MPI library should be generated)
AC_MSG_RESULT($use_mpi)
AC_SUBST(USE_MPI, $use_mpi)
AM_CONDITIONAL(USE_MPI, test x$use_mpi = xyes)
if test x$use_mpi = xyes; then
	AC_DEFINE(STARPU_USE_MPI,[],[whether the StarPU MPI library is available])
fi

AC_MSG_CHECKING(whether communication statistics should be generated)
AC_ARG_ENABLE(comm-stats, [AS_HELP_STRING([--enable-comm-stats],
			[enable communication statistics (only valid with the StarPU MPI library])],
			enable_comm_stats=$enableval, enable_comm_stats=no)
AC_MSG_RESULT($enable_comm_stats)
AC_SUBST(STATS, $enable_comm_stats)
AC_SUBST(STARPU_COMM_STATS, $enable_comm_stats)

if test x$enable_comm_stats = xyes; then
        AC_DEFINE(STARPU_COMM_STATS, [1], [enable communication statistics])
fi

###############################################################################
#                                                                             #
#                               StarPU-Top                                    #
#                                                                             #
###############################################################################

AC_ARG_ENABLE([starpu-top],
  [AS_HELP_STRING([--disable-starpu-top],
    [build StarPU-Top])],
  [enable_starpu_top="$enableval"],
  [enable_starpu_top="maybe"])

# Check whether StarPU-Top can be built
AC_MSG_CHECKING(for StarPU-Top)

if test "x$enable_starpu_top" != "xno" ; then
	can_build_starpu_top=no
	AC_PATH_PROGS([QMAKE], [qmake-qt4 qmake], [not-found])
	if test x$QMAKE != xnot-found; then
		QMAKE_VERSION=`$QMAKE --version 2>&1 | head -n 1 | cut -d '.' -f 1 | cut -d ' ' -f 3`
		if test $QMAKE_VERSION -ge 2 ; then
			PKG_CHECK_EXISTS([QtGui QtNetwork QtOpenGL QtSql], [
				QT_MAJVERSION=`$PKG_CONFIG --modversion QtGui | cut -d '.' -f 1`
				QT_MINVERSION=`$PKG_CONFIG --modversion QtGui | cut -d '.' -f 2`
				if test $QT_MAJVERSION -gt 4 -o \( $QT_MAJVERSION -eq 4 -a $QT_MINVERSION -ge 7 \) ; then
					can_build_starpu_top=yes
				fi
				QWT_PRI=embed
				AC_ARG_WITH(qwt-include-dir,
					[AS_HELP_STRING([--with-qwt-include-dir=<path>],
					[specify installed libqwt include path])],
					[
						STARPU_QWT_INCLUDE="$withval"
						AC_SUBST(STARPU_QWT_INCLUDE)
						QWT_PRI=system
					])
				AC_ARG_WITH(qwt-lib-dir,
					[AS_HELP_STRING([--with-qwt-lib-dir=<path>],
					[specify installed libqwt library path])],
					[
						STARPU_QWT_LDFLAGS="-L$withval"
						QWT_PRI=system
					])
				AC_ARG_WITH(qwt-lib,
					[AS_HELP_STRING([--with-qwt-lib=<name>],
					[specify installed libqwt library name])],
					[
						STARPU_QWT_LDFLAGS="${STARPU_QWT_LDFLAGS} -l$withval"
						QWT_PRI=system
					])
				AC_SUBST(STARPU_QWT_LDFLAGS)
				AC_SUBST(QWT_PRI)
			])
		fi
	fi
fi

if test "x$enable_starpu_top" != "xno" ; then
  build_starpu_top=$can_build_starpu_top
else
  build_starpu_top=no
fi

AM_CONDITIONAL(BUILD_STARPU_TOP, test x$build_starpu_top = xyes)

###############################################################################
#                                                                             #
#                           Flags for C Compiler                              #
#                                                                             #
###############################################################################

# IS_SUPPORTED_CFLAG(flag)
# ------------------------
# Check if the CFLAGS `flag' is supported by the compiler
AC_DEFUN([IS_SUPPORTED_CFLAG],
[
	AC_REQUIRE([AC_PROG_CC])

	AC_MSG_CHECKING([whether compiler support $1])

	SAVED_CFLAGS="$CFLAGS"
	CFLAGS="$1" # -we10006"

	AC_COMPILE_IFELSE(
		AC_LANG_PROGRAM(
			[[]],
			[[
				AC_LANG_SOURCE([
					const char *hello = "Hello World";
				])
			]]
		),
		[
			GLOBAL_AM_CFLAGS="$GLOBAL_AM_CFLAGS $1"
			AC_MSG_RESULT(yes)
		],
			AC_MSG_RESULT(no)
	)
	CFLAGS="$SAVED_CFLAGS"
])

IS_SUPPORTED_CFLAG(-W)
IS_SUPPORTED_CFLAG(-Wall)
IS_SUPPORTED_CFLAG(-Wextra)
AC_SUBST(GLOBAL_AM_CFLAGS)

if test "x$STARPU_DEVEL" != x; then
	AC_DEFINE(STARPU_DEVEL, [1], [enable developer warnings])
fi

# Same value as Automake's, for use in other places.
pkglibdir="\${libdir}/$PACKAGE"
AC_SUBST([pkglibdir])


###############################################################################
#                                                                             #
#                               GCC extensions                                #
#                                                                             #
###############################################################################

AC_ARG_ENABLE([gcc-extensions],
  [AS_HELP_STRING([--enable-gcc-extensions],
    [build the GCC plug-in that provides C language extensions (experimental)])],
  [enable_gcc_plugin="$enableval"],
  [enable_gcc_plugin="maybe"])

if test "x$enable_gcc_plugin" = "xyes" -o "x$enable_gcc_plugin" = "xmaybe" ; then
    STARPU_GCC_PLUGIN_SUPPORT

    if test "x$ac_cv_have_gcc_plugins" = "xno" ; then
        if test "x$enable_gcc_plugin" = "xyes" ; then
    	    # Since this was explicitly asked for, error out.
            AC_MSG_ERROR([This compiler lacks GCC plug-in support.])
	else
	    AC_MSG_WARN([GCC plug-ins not supported; StarPU's GCC plug-in will not be built])
        fi
    else
        # What GCC version are we using?
        STARPU_GCC_VERSION

        # The `.so' itself cannot be called `starpu-gcc.so' (because
	# `-fplugin-arg-' option names and such must match the `.so'
	# name), so use a meaningful directory name.
	gccplugindir="\${pkglibdir}/${STARPU_EFFECTIVE_VERSION}/gcc/${STARPU_GCC_VERSION_MAJOR}.${STARPU_GCC_VERSION_MINOR}"
	AC_SUBST([gccplugindir])

	# Lines to be inserted in the `.pc' file.
	GCC_PLUGIN_DIR_PKGCONFIG="gccplugindir=$gccplugindir"
	GCC_PLUGIN_PKGCONFIG="gccplugin=\${gccplugindir}/starpu.so"
	AC_SUBST([GCC_PLUGIN_DIR_PKGCONFIG])
	AC_SUBST([GCC_PLUGIN_PKGCONFIG])
    fi
fi
AM_CONDITIONAL([HAVE_PTR_DEREFS_MAY_ALIAS_P],
               [test "x$ac_cv_have_decl_ptr_derefs_may_alias_p" = "xyes"])


if test "x$ac_cv_have_gcc_plugins" = "xyes" ; then
    build_gcc_plugin="yes"

    # GNU Guile 1.8/2.0 is used to run the test suite.
    AC_PATH_PROG([GUILE], [guile])
    if test "x$GUILE" != "x"; then
        if test "x$enable_cpu" = "xyes"; then
	   run_gcc_plugin_test_suite="yes"
	else
	   AC_MSG_WARN([CPU back-end disabled; GCC plug-in test suite will not be run])
	   run_gcc_plugin_test_suite="no"
	fi
    else
	run_gcc_plugin_test_suite="no"
    fi
else
    build_gcc_plugin="no"
    run_gcc_plugin_test_suite="no"
fi

# Bison is used to generate the C expression parser.  The generated
# parser is part of the distribution, though.
AM_MISSING_PROG([YACC], [bison])

AM_CONDITIONAL([BUILD_GCC_PLUGIN], [test "x$build_gcc_plugin" = "xyes"])
AM_CONDITIONAL([RUN_GCC_PLUGIN_TESTS],
  [test "x$run_gcc_plugin_test_suite" = "xyes"])

###############################################################################
#                                                                             #
#                               SOCL interface                                #
#                                                                             #
###############################################################################

AC_ARG_ENABLE([socl],
  [AS_HELP_STRING([--enable-socl],
    [build the OpenCL interface (experimental)])],
  [enable_socl="$enableval"],
  [enable_socl="maybe"])

AC_MSG_CHECKING(for SOCL)

if test "x$enable_socl" = "xyes" -o "x$enable_socl" = "xmaybe" ; then
    if test "$have_valid_opencl" = "no" ; then
	STARPU_LOOK_FOR_OPENCL()
    fi
fi

# in case SOCL was explicitely required, but is not available, this is an error
if test "x$enable_socl" = "xyes" -a "$have_valid_opencl" = "no" ; then
    AC_MSG_ERROR([SOCL cannot be enabled without OpenCL])
fi

# now we enable SOCL if and only if a proper setup is available
if test "x$enable_socl" = "xyes" -o "x$enable_socl" = "xmaybe" ; then
   build_socl=$have_valid_opencl
else
   build_socl=no
fi

AC_MSG_RESULT($build_socl)
AM_CONDITIONAL([BUILD_SOCL], [test "x$build_socl" = "xyes"])
AM_CONDITIONAL([STARPU_USE_SOCL], [test "x$build_socl" = "xyes"])

if test "$build_socl" = "yes" ; then
   AC_CHECK_FUNCS([clGetExtensionFunctionAddressForPlatform])
   if test -z "$SOCL_OCL_LIB_OPENCL" ; then
      run_socl_check=no
   else
       run_socl_check=yes
       AC_SUBST(SOCL_OCL_LIB_OPENCL)
   fi
fi
###############################################################################
#                                                                             #
#                                 Debugging                                   #
#                                                                             #
###############################################################################

AC_PATH_PROG([GDB], [gdb], [not-found])
if test "x$GDB" != "xnot-found"; then
   AC_DEFINE_UNQUOTED([STARPU_GDB_PATH], ["$GDB"],
     [Path to the GNU debugger.])
fi

###############################################################################
#                                                                             #
#                                  Examples                                   #
#                                                                             #
###############################################################################

AC_ARG_ENABLE(build-examples, [AS_HELP_STRING([--disable-build-examples],
			[disable building of examples])],
			enable_build_examples=$enableval, enable_build_examples=yes)
# check stuff for examples (todo)
AM_CONDITIONAL(BUILD_EXAMPLES, [test x$enable_build_examples != xno])
AC_ARG_ENABLE(opengl-render, [AS_HELP_STRING([--enable-opengl-render],
			[enable OpenGL rendering of some examples])],
			enable_opengl_render=$enableval, enable_opengl_render=no)

if test x$enable_opengl_render = xyes; then
	STARPU_CHECK_LIB(OPENGL_RENDER, glut, glutInit,,AC_MSG_ERROR([cannot find glut]))
	STARPU_CHECK_LIB(OPENGL_RENDER, GL, glXCreateContext,,AC_MSG_ERROR([cannot find GL]))
	STARPU_CHECK_LIB(OPENGL_RENDER, GLU, gluLookAt,,AC_MSG_ERROR([cannot find GLU]))

	AC_DEFINE(STARPU_OPENGL_RENDER, [1], [enable OpenGL rendering of some examples])
fi

AC_MSG_CHECKING(whether OpenGL rendering is enabled)
AC_SUBST(STARPU_OPENGL_RENDER, $enable_opengl_render)
AC_MSG_RESULT($enable_opengl_render)
AM_CONDITIONAL([HAVE_OPENGL], [test "x$enable_opengl_render" = xyes])

AC_PATH_XTRA
if test "x$no_x" != "xyes"; then
	AC_DEFINE(STARPU_HAVE_X11, [1], [enable X11])
fi
AM_CONDITIONAL([HAVE_X11], [test "x$no_x" != "xyes"])

# In case there are BLAS kernels that are used by the example applications
# we may specify which library to use. Note that this is not used for StarPU
# itself.

blas_lib=maybe
AC_ARG_ENABLE(blas-lib,
 [  --enable-blas-lib[=blaslibname]:
                      none [default]: no BLAS lib is used
                      atlas: use ATLAS library
                      goto: use GotoBLAS library],
 [
     if   test "x$enableval" = "xatlas" ; then
        blas_lib=atlas
     elif test "x$enableval" = "xgoto" ; then
        blas_lib=goto
     elif test "x$enableval" = "xnone" ; then
        blas_lib=none
     elif test x$enableval = xno; then
	blas_lib=none
     else
        echo
        echo "Error!"
        echo "Unknown BLAS library"
        exit -1
     fi
 ])

if test x$blas_lib = xmaybe -o x$blas_lib = xgoto; then
AC_ARG_WITH(goto-dir, [AS_HELP_STRING([--with-goto-dir=<dir>], [specify GotoBLAS lib location])],
	[
		blas_lib=goto
		gotodir=$withval
		AC_SUBST(GOTODIR, $gotodir)

		CPPFLAGS="${CPPFLAGS} -I$gotodir/ "
		LDFLAGS="${LDFLAGS} -L$gotodir/ "
	]
	)

if test x$blas_lib = xgoto; then
STARPU_CHECK_LIB(BLAS, gfortran, main,,)
STARPU_CHECK_LIB(BLAS, ifcore, main,,)
# Perhaps that GotoBLAS2 is available instead (so that we have libgotoblas2.{so,a})
STARPU_CHECK_LIB(BLAS, goto2, sgemm_,, [havegoto2=no], [$STARPU_BLAS_LDFLAGS])
if test x$havegoto2 = xno; then
STARPU_CHECK_LIB(BLAS, goto, sgemm_,,AC_MSG_ERROR([cannot find goto lib]), [$STARPU_BLAS_LDFLAGS])
fi
AC_DEFINE(STARPU_GOTO, [1], [use STARPU_GOTO library])
fi

fi

if test x$blas_lib = xmaybe -o x$blas_lib = xatlas; then
AC_ARG_WITH(atlas-dir, [AS_HELP_STRING([--with-atlas-dir=<dir>], [specify ATLAS lib location])],
	[
		AC_MSG_CHECKING(STARPU_ATLAS location)
		blas_lib=atlas
		atlasdir=$withval
		AC_MSG_RESULT($atlasdir)
		AC_SUBST(ATLASDIR, $atlasdir)

		CPPFLAGS="${CPPFLAGS} -I$atlasdir/include/ "
		LDFLAGS="${LDFLAGS} -L$atlasdir/lib/ "
	]
	)

if test x$blas_lib = xatlas; then
# test whether STARPU_ATLAS is actually available
AC_CHECK_HEADER([cblas.h],,AC_MSG_ERROR([cannot find atlas headers]))
STARPU_CHECK_LIB(BLAS, atlas, ATL_sgemm,,AC_MSG_ERROR([cannot find atlas lib]),)
STARPU_CHECK_LIB(BLAS, cblas, cblas_sgemm,,AC_MSG_ERROR([cannot find atlas lib]),[-latlas])
AC_DEFINE(STARPU_ATLAS, [1], [use STARPU_ATLAS library])
fi

fi

if test x$blas_lib = xmaybe; then
	# Should we use MKL ?
	AC_ARG_WITH(mkl-cflags, [AS_HELP_STRING([--with-mkl-cflags], [specify MKL compilation flags])],
		[
			CPPFLAGS="${CPPFLAGS} $withval"
			blas_lib=mkl
		])

	AC_ARG_WITH(mkl-ldflags, [AS_HELP_STRING([--with-mkl-ldflags], [specify MKL linking flags])],
		[
			LDFLAGS="${LDFLAGS} $withval"
			blas_lib=mkl
		])
	if test x$blas_lib = xmkl; then
	        AC_DEFINE(STARPU_MKL, [1], [use MKL library])
	fi
fi

if test x$blas_lib = xmaybe; then
     #perhaps it is possible to use some BLAS lib from the system
     use_system_blas=no
     STARPU_SEARCH_LIBS(BLAS,[sgemm_],[blas],use_system_blas=yes,,)
     if test x$use_system_blas = xyes; then
        AC_DEFINE(STARPU_SYSTEM_BLAS, [1], [use refblas library])
	blas_lib=system
     elif test x"$BLAS_LIBS" != x; then
        AC_DEFINE(STARPU_SYSTEM_BLAS, [1], [use user defined library])
        STARPU_BLAS_LDFLAGS="$BLAS_LIBS"
        AC_SUBST(STARPU_BLAS_LDFLAGS)
        blas_lib=system
        AC_ARG_VAR([BLAS_LIBS], [linker flags for blas])
     else
	blas_lib=none
     fi
fi

AM_CONDITIONAL(ATLAS_BLAS_LIB, test x$blas_lib = xatlas)
AM_CONDITIONAL(GOTO_BLAS_LIB, test x$blas_lib = xgoto)
AM_CONDITIONAL(MKL_BLAS_LIB, test x$blas_lib = xmkl)
AM_CONDITIONAL(SYSTEM_BLAS_LIB, test x$blas_lib = xsystem)
AM_CONDITIONAL(NO_BLAS_LIB, test x$blas_lib = xnone)

AC_MSG_CHECKING(which BLAS lib should be used)
AC_MSG_RESULT($blas_lib)
AC_SUBST(BLAS_LIB,$blas_lib)

##########################################
# FFT                                    #
##########################################

have_fftw=no
have_fftwf=no
have_fftwl=no
fft_support=no

AC_ARG_ENABLE(starpufft, [AS_HELP_STRING([--disable-starpufft],
			[Disable build of StarPU-FFT])],
			enable_starpufft=$enableval,enable_starpufft=yes)

PKG_CHECK_MODULES([FFTW],  [fftw3],  [
  AC_DEFINE([STARPU_HAVE_FFTW], [1], [Define to 1 if you have the libfftw3 library.])
  AC_SUBST([STARPU_HAVE_FFTW], [1])
  have_fftw=yes
], [:])
AM_CONDITIONAL(STARPU_HAVE_FFTW, [test x$have_fftw = xyes])

PKG_CHECK_MODULES([FFTWF], [fftw3f], [
  AC_DEFINE([STARPU_HAVE_FFTWF], [1], [Define to 1 if you have the libfftw3f library.])
  AC_SUBST([STARPU_HAVE_FFTWF], [1])
  have_fftwf=yes
], [:])
AM_CONDITIONAL(STARPU_HAVE_FFTWF, [test x$have_fftwf = xyes])

PKG_CHECK_MODULES([FFTWL], [fftw3l], [
  AC_DEFINE([STARPU_HAVE_FFTWL], [1], [Define to 1 if you have the libfftw3l library.])
  AC_SUBST([HAVE_FFTWFL], [1])
  have_fftwl=yes
], [:])
AM_CONDITIONAL(STARPU_HAVE_FFTWL, [test x$have_fftwl = xyes])

if test x$enable_starpufft = xyes -a \( \( x$enable_cpu = xyes -a x$have_fftw = xyes -a x$have_fftwf = xyes \) -o x$have_cufftdoublecomplex = xyes \); then
   fft_support=yes
fi
AM_CONDITIONAL(BUILD_STARPUFFT, [test x$fft_support = xyes])

##########################################
# hwloc                                  #
##########################################

AC_ARG_WITH([hwloc],
	[AS_HELP_STRING([--without-hwloc], [Disable hwloc (enabled by default)])],
	[
		if test x$withval != xno; then
			if test "$withval" = "yes" ; then
				use_hwloc_from_system=yes
				use_hwloc=yes
			else
				# use specified path
				use_hwloc_from_system=no
				if test ! -d "$withval" ; then
				   AC_MSG_ERROR("Directory specified for hwloc <$withval> does not exist")
				fi
				hwloc_dir=$withval
				use_hwloc=yes
			fi
		else
			use_hwloc=no
		fi
	],
	[
	AC_MSG_NOTICE("MAYBE HWLOC")
		use_hwloc=maybe
		use_hwloc_from_system=yes
	])
SAVED_LDFLAGS="${LDFLAGS}"
SAVED_CPPFLAGS="${CPPFLAGS}"
AS_IF([test "$use_hwloc" = "no"],
  [have_valid_hwloc=no],
  [AS_IF([test "$use_hwloc_from_system" = "yes"],
  	  [PKG_CHECK_MODULES([HWLOC],[hwloc], [
	      	have_valid_hwloc=yes
		have_pkgconfig_hwloc=yes], [
		have_valid_hwloc=no
		have_pkgconfig_hwloc=no])
	  ],
	  #else
	  [have_pkgconfig_hwloc=no
	   CPPFLAGS="${SAVED_CPPFLAGS} -I$hwloc_dir/include"
	   AC_CHECK_HEADER([hwloc.h],[have_valid_hwloc=yes],[have_valid_hwloc=no])
	   LDFLAGS="${SAVED_LDFLAGS} -L$hwloc_dir/lib"
	   AC_HAVE_LIBRARY([hwloc],[have_valid_hwloc=yes],[have_valid_hwloc=no])
	  ])
  ])
# in case hwloc was explicitely required, but is not available, this is an error
AS_IF([test "$use_hwloc" = "yes" -a "$have_valid_hwloc" = "no"],
      [AC_MSG_ERROR([cannot find hwloc])]
     )
# in case hwloc is not available but was not explicitely disabled, this is an error
AS_IF([test "$have_valid_hwloc" = "no" -a "$use_hwloc" != "no"],
      [AC_MSG_ERROR([hwloc was not found on your system. If the target machine is hyperthreaded the performance may be impacted a lot.  It is strongly recommended to install hwloc. However, if you really want to use StarPU without enabling hwloc, please restart configure by specifying the option '--without-hwloc'.])]
     )

AS_IF([test "$have_valid_hwloc" = "yes"],
      [AC_DEFINE([STARPU_HAVE_HWLOC], [1], [Define to 1 if you have the hwloc library.])
       HWLOC_REQUIRES=hwloc
       AC_SUBST([STARPU_HAVE_HWLOC], [1])
       AS_IF([test "$have_pkgconfig_hwloc" = "no"],
             [HWLOC_CFLAGS="-I$hwloc_dir/include"
	      HWLOC_LIBS="-L$hwloc_dir/lib -lhwloc"]
       )
      ])
LDFLAGS="${SAVED_LDFLAGS}"
CPPFLAGS="${SAVED_CPPFLAGS}"

AC_MSG_CHECKING(whether hwloc should be used)
AC_MSG_RESULT($have_valid_hwloc)
AC_SUBST(HWLOC_REQUIRES)

# is the header file f77.h available ?
have_f77_h=yes
AC_CHECK_HEADER([f77.h],,[have_f77_h=no])
AC_MSG_CHECKING(whether header file f77.h is available)
AC_MSG_RESULT($have_f77_h)
AC_SUBST(STARPU_HAVE_F77_H, $have_f77_h)
AM_CONDITIONAL(STARPU_HAVE_F77_H, test x$have_f77_h = xyes)
if test x$have_f77_h = xyes; then
        AC_DEFINE([STARPU_HAVE_F77_H], [1], [Define to 1 if you have the <f77.h> header file.])
fi

# Check if icc is available
AC_CHECK_PROGS([ICC], [icc])

# If cuda and icc are both available, check they are compatible
if test "$enable_cuda" = "yes" -a "$ICC" != ""; then
   AC_MSG_CHECKING(whether CUDA and ICC are compatible)
   OLD_CC="$CC"
   CC="$ICC"
   OLD_CFLAGS="$CFLAGS"
   CFLAGS="-I$PWD/include -I$srcdir/include"
   AC_COMPILE_IFELSE(
       [AC_LANG_PROGRAM(
	   [[#include <cuda.h>
	   #include <starpu.h>]],
	   [[]]
	   )],
       AC_MSG_RESULT(yes),
       [ICC=""
           AC_MSG_RESULT(no)]
   )
   CC="$OLD_CC"
   CFLAGS="$OLD_CFLAGS"
fi

# Disable ICC on windows
if test "x$ICC" != "x" -a "$starpu_windows" = "yes" ; then
    ICC=""
fi
if test "x$ICC" != "x"; then
  AC_DEFINE(STARPU_HAVE_ICC, [], [Define this if icc is available])
fi
AM_CONDITIONAL([STARPU_HAVE_ICC], [test "x$ICC" != "x"])

# Do not generate manpages for the tools if we do not have help2man
AC_CHECK_PROGS([HELP2MAN], [help2man])
# Disable on windows
if test "$starpu_windows" = "yes" ; then
    HELP2MAN=""
fi
AM_CONDITIONAL([STARPU_HAVE_HELP2MAN], [test "x$HELP2MAN" != "x"])

AC_CHECK_MEMBER([struct cudaDeviceProp.pciDomainID],
  AC_DEFINE([STARPU_HAVE_DOMAINID],[1],[Define to 1 if CUDA device properties include DomainID]),
  , [[#include <cuda_runtime_api.h>]])

AC_CHECK_MEMBER([struct cudaDeviceProp.pciBusID],
  AC_DEFINE([STARPU_HAVE_BUSID],[1],[Define to 1 if CUDA device properties include BusID]),
  , [[#include <cuda_runtime_api.h>]])

dnl Set this condition when Automake 1.11 or later is being used.
dnl Automake 1.11 introduced `silent-rules', hence the check.
m4_ifdef([AM_SILENT_RULES],
  AM_CONDITIONAL([STARPU_HAVE_AM111], [true]),
  AM_CONDITIONAL([STARPU_HAVE_AM111], [false]))

###############################################################################
#                                                                             #
#                                Final settings                               #
#                                                                             #
###############################################################################

# these are the flags needed for static linking
LIBSTARPU_LDFLAGS="$STARPU_GLPK_LDFLAGS"
AC_SUBST([LIBSTARPU_LDFLAGS])

LIBSTARPU_LINK=libstarpu-$STARPU_EFFECTIVE_VERSION.la
if test x$enable_perf_debug = xyes; then
	LIBSTARPU_LINK=".libs/libstarpu-$STARPU_EFFECTIVE_VERSION.a $LIBSTARPU_LDFLAGS $HWLOC_LIBS $STARPU_CUDA_LDFLAGS $STARPU_OPENCL_LDFLAGS"
fi
AC_SUBST([LIBSTARPU_LINK])

# File configuration
AC_CONFIG_COMMANDS([executable-scripts], [
  chmod +x tests/regression/regression.sh
  chmod +x gcc-plugin/tests/run-test
  chmod +x tools/starpu_workers_activity
])

# Create links to ICD files in build/socl/vendors directory. SOCL will use this
# directory as the OCL_ICD_VENDORS directory
if test -d /etc/OpenCL/vendors; then
    for icd in /etc/OpenCL/vendors/*.icd ; do
        if test "$(basename $icd)" != "socl.icd" ; then
            new_icd=$(basename $icd)
 	    AC_CONFIG_LINKS([socl/vendors/$new_icd:$icd])
        fi
    done
fi

AC_CONFIG_FILES(tests/regression/regression.sh tests/regression/profiles tests/regression/profiles.build.only)
AC_CONFIG_HEADER(src/common/config.h include/starpu_config.h gcc-plugin/include/starpu-gcc/config.h starpu-top/config.h)

AC_OUTPUT([
	Makefile
	src/Makefile
	tools/Makefile
	tools/starpu_workers_activity
	socl/Makefile
	socl/src/Makefile
	socl/examples/Makefile
        socl/socl-1.0.pc
	socl/vendors/socl.icd
	libstarpu.pc
	starpu-1.0.pc
	mpi/libstarpumpi.pc
	mpi/starpumpi-1.0.pc
	starpufft/Makefile
	starpufft/libstarpufft.pc
	starpufft/starpufft-1.0.pc
	examples/Makefile
	examples/stencil/Makefile
	tests/Makefile
	doc/Makefile
	mpi/Makefile
	mpi/src/Makefile
	mpi/tests/Makefile
	mpi/examples/Makefile
	starpu-top/StarPU-Top.pro
	starpu-top/StarPU-Top-qwt-embed.pri
	starpu-top/StarPU-Top-qwt-system.pri
        gcc-plugin/Makefile
	gcc-plugin/src/Makefile
	gcc-plugin/tests/Makefile
	gcc-plugin/tests/run-test
	gcc-plugin/examples/Makefile
])

AC_MSG_NOTICE([

	CPUs   enabled: $enable_cpu
	CUDA   enabled: $enable_cuda
	OpenCL enabled: $enable_opencl
	Cell   enabled: $enable_gordon

	Compile-time limits
	(change these with --enable-maxcpus, --enable-maxcudadev,
	--enable-maxopencldev, --enable-maxbuffers)

	Maximum number of CPUs:           $maxcpus
	Maximum number of CUDA devices:   $nmaxcudadev
	Maximum number of OpenCL devices: $nmaxopencldev
	Maximum number of memory nodes:   $maxnodes
	Maximum number of task buffers:   $nmaxbuffers

	GPU-GPU transfers: $have_cuda_memcpy_peer
	Allocation cache:  $enable_allocation_cache

	Magma enabled: $have_magma
	BLAS library:  $blas_lib
	hwloc:         $have_valid_hwloc
	FxT trace enabled: $use_fxt
	StarPU-Top:        $build_starpu_top

	StarPU Extensions:
	       MPI enabled:   $use_mpi
	       MPI test suite: $running_mpi_check
	       FFT Support: $fft_support
	       GCC plug-in: $build_gcc_plugin
	       GCC plug-in test suite (requires GNU Guile): $run_gcc_plugin_test_suite
	       SOCL enabled:  $build_socl
               SOCL test suite: $run_socl_check
])

if test "$build_socl" = "yes" -a "$run_socl_check" = "no" ; then
	AC_MSG_NOTICE([
WARNING: SOCL test suite will not be run as the environment variable SOCL_OCL_LIB_OPENCL is not defined.
To run the tests, you need to install the OCL implementation of ICD
(https://forge.imag.fr/projects/ocl-icd/ or Debian package ocl-icd-libopencl1)
and set the variable SOCL_OCL_LIB_OPENCL to the location of the libOpenCL.so.])
fi

if test x"$have_valid_hwloc" = xno
then
  AC_MSG_NOTICE([
WARNING: hwloc was not enabled.  If the target machine is hyperthreaded the
performance may be impacted a lot.  It is strongly recommended to install
hwloc])
fi