#!/bin/sh
#############################################################################
##
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
## Contact: Nokia Corporation (qt-info@nokia.com)
##
## This file is the build configuration utility of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:LGPL$
## No Commercial Usage
## This file contains pre-release code and may not be distributed.
## You may use this file in accordance with the terms and conditions
## contained in the Technology Preview License Agreement accompanying
## this package.
##
## GNU Lesser General Public License Usage
## Alternatively, this file may be used under the terms of the GNU Lesser
## General Public License version 2.1 as published by the Free Software
## Foundation and appearing in the file LICENSE.LGPL included in the
## packaging of this file.  Please review the following information to
## ensure the GNU Lesser General Public License version 2.1 requirements
## will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
##
## In addition, as a special exception, Nokia gives you certain additional
## rights.  These rights are described in the Nokia Qt LGPL Exception
## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
##
## If you have questions regarding the use of this file, please contact
## Nokia at qt-info@nokia.com.
##
##
##
##
##
##
##
##
## $QT_END_LICENSE$
##
#############################################################################

#-------------------------------------------------------------------------------
# script initialization
#-------------------------------------------------------------------------------

# the name of this script
relconf=`basename $0`
# the directory of this script is the "source tree"
relpath=`dirname $0`
relpath=`(cd "$relpath"; /bin/pwd)`
# the current directory is the "build tree" or "object tree"
outpath=`/bin/pwd`

#-------------------------------------------------------------------------------
# operating system detection
#-------------------------------------------------------------------------------

# need that throughout the script
UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown

# detect the "echo without newline" style. usage: echo $ECHO_N "<string>$ECHO_C"
if echo '\c' | grep '\c' >/dev/null; then
    ECHO_N=-n
else
    ECHO_C='\c'
fi

PLATFORM_MAC=no
if [ -d /System/Library/Frameworks/Carbon.framework ]; then
    PLATFORM_MAC=yes
fi

#-------------------------------------------------------------------------------
# print some introductory text
#-------------------------------------------------------------------------------

cat <<EOF

This is the QtOpenCL configuration utility.

EOF

if [ ! -f "$relpath/opencl.pro" ] ; then
    echo "Could not find opencl.pro ... aborting"
    exit 1
fi

#-------------------------------------------------------------------------------
# initalize variables
#-------------------------------------------------------------------------------

# Use CC/CXX to run config.tests
mkdir -p "$outpath/config.tests"

# QTDIR may be set and point to an old or system-wide Qt installation
unset QTDIR

# initalize internal variables
CFG_OPENCL=yes
CFG_OPENCL_1_1=auto
CFG_OPENCLGL=auto
CFG_GCOV=no

OPT_SHADOW=maybe
OPT_QMAKE=
OPT_VERBOSE=no
OPT_HELP=
D_FLAGS=
I_FLAGS=
INCLUDEPATH=
L_FLAGS=
RPATH_FLAGS=
l_FLAGS=

#-------------------------------------------------------------------------------
# parse command line arguments
#-------------------------------------------------------------------------------

# parse the arguments, setting things to "yes" or "no"
while [ "$#" -gt 0 ]; do
    CURRENT_OPT="$1"
    UNKNOWN_ARG=no
    case "$1" in
    #Autoconf style options
    --enable-*)
        VAR=`echo $1 | sed "s,^--enable-\(.*\),\1,"`
        VAL=yes
        ;;
    --disable-*)
        VAR=`echo $1 | sed "s,^--disable-\(.*\),\1,"`
        VAL=no
        ;;
    --*=*)
        VAR=`echo $1 | sed "s,^--\(.*\)=.*,\1,"`
        VAL=`echo $1 | sed "s,^--.*=\(.*\),\1,"`
        ;;
    --no-*)
        VAR=`echo $1 | sed "s,^--no-\(.*\),\1,"`
        VAL=no
        ;;
    --*)
        VAR=`echo $1 | sed "s,^--\(.*\),\1,"`
        VAL=yes
        ;;
    #Qt style no options
    -no-*)
        VAR=`echo $1 | sed "s,^-no-\(.*\),\1,"`
        VAL=no
        ;;
    #Qt style yes options
    -opencl|-verbose|-v|-help|-h|-gcov)
        VAR=`echo $1 | sed "s,^-\(.*\),\1,"`
        VAL=yes
        ;;
    -openclgl)
        VAR=`echo $1 | sed "s,^-\(.*\),\1,"`
        VAL=yes
        ;;
    #Qt style options that pass an argument
    -qmake)
        VAR=`echo $1 | sed "s,^-\(.*\),\1,"`
        shift
        VAL="$1"
        ;;
    #Qt style complex options in one command
    -enable-*|-disable-*)
        VAR=`echo $1 | sed "s,^-\([^-]*\)-.*,\1,"`
        VAL=`echo $1 | sed "s,^-[^-]*-\(.*\),\1,"`
        ;;
    -D?*|-D)
        VAR="add_define"
        if [ "$1" = "-D" ]; then
            shift
            VAL="$1"
        else
            VAL=`echo $1 | sed 's,-D,,'`
        fi
        ;;
    -I?*|-I)
        VAR="add_ipath"
        if [ "$1" = "-I" ]; then
            shift
            VAL="$1"
        else
            VAL=`echo $1 | sed 's,-I,,'`
        fi
        ;;
    -L?*|-L)
        VAR="add_lpath"
        if [ "$1" = "-L" ]; then
            shift
            VAL="$1"
        else
            VAL=`echo $1 | sed 's,-L,,'`
        fi
        ;;
    -R?*|-R)
        VAR="add_rpath"
        if [ "$1" = "-R" ]; then
            shift
            VAL="$1"
        else
            VAL=`echo $1 | sed 's,-R,,'`
        fi
        ;;
    -l?*)
        VAR="add_link"
        VAL=`echo $1 | sed 's,-l,,'`
        ;;
    -F?*|-F)
        VAR="add_fpath"
        if [ "$1" = "-F" ]; then
            shift
            VAL="$1"
        else
            VAL=`echo $1 | sed 's,-F,,'`
        fi
        ;;
    -fw?*|-fw)
        VAR="add_framework"
        if [ "$1" = "-fw" ]; then
            shift
            VAL="$1"
        else
            VAL=`echo $1 | sed 's,-fw,,'`
        fi
        ;;
    -*)
        VAR=`echo $1 | sed "s,^-\(.*\),\1,"`
        VAL="unknown"
        ;;
    *)
        UNKNOWN_ARG=yes
        ;;
    esac
    if [ "$UNKNOWN_ARG" = "yes" ]; then
        echo "$1: unknown argument"
        OPT_HELP=yes
        ERROR=yes
        shift
        continue
     fi
    shift

    UNKNOWN_OPT=no
    case "$VAR" in
    opencl)
        if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
            CFG_OPENCL="$VAL"
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    openclgl)
        if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
            CFG_OPENCLGL="$VAL"
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    gcov)
        if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
            CFG_GCOV="$VAL"
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    qmake)
        OPT_QMAKE="$VAL"
	;;
    h|help)
        if [ "$VAL" = "yes" ]; then
            OPT_HELP="$VAL"
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    v|verbose)
        if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
            OPT_VERBOSE="$VAL"
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    add_define)
        D_FLAGS="$D_FLAGS -D\"$VAL\""
        ;;
    add_ipath)
        I_FLAGS="$I_FLAGS -I\"${VAL}\""
        INCLUDEPATH="$INCLUDEPATH \"${VAL}\""
        ;;
    add_lpath)
        L_FLAGS="$L_FLAGS -L\"${VAL}\""
        ;;
    add_rpath)
        RPATH_FLAGS="$RPATH_FLAGS \"${VAL}\""
        ;;
    add_link)
        l_FLAGS="$l_FLAGS -l\"${VAL}\""
        ;;
    add_fpath)
        if [ "$PLATFORM_MAC" = "yes" ]; then
            L_FLAGS="$L_FLAGS -F\"${VAL}\""
            I_FLAGS="$I_FLAGS -F\"${VAL}\""
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    add_framework)
        if [ "$PLATFORM_MAC" = "yes" ]; then
            l_FLAGS="$l_FLAGS -framework \"${VAL}\""
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    *)
        UNKNOWN_OPT=yes
        ;;
    esac
    if [ "$UNKNOWN_OPT" = "yes" ]; then
        echo "${CURRENT_OPT}: invalid command-line switch"
        OPT_HELP=yes
        ERROR=yes
    fi
done

#-------------------------------------------------------------------------------
# build tree initialization
#-------------------------------------------------------------------------------

# where to find which..
unixtests="$relpath/config.tests/unix"
mactests="$relpath/config.tests/mac"
symbiantests="$relpath/config.tests/symbian"
WHICH="$unixtests/which.test"

### skip this if the user just needs help...
if [ "$OPT_HELP" != "yes" ]; then

# is this a shadow build?
if [ "$OPT_SHADOW" = "maybe" ]; then
    OPT_SHADOW=no
    if [ "$relpath" != "$outpath" ] && [ '!' -f "$outpath/configure" ]; then
        if [ -h "$outpath" ]; then
            [ "$relpath" -ef "$outpath" ] || OPT_SHADOW=yes
        else
            OPT_SHADOW=yes
        fi
    fi
fi

# find a make command
if [ -z "$MAKE" ]; then
    MAKE=
    for mk in gmake make; do
        if "$WHICH" $mk >/dev/null 2>&1; then
            MAKE=`"$WHICH" $mk`
            break
        fi
    done
    if [ -z "$MAKE" ]; then
        echo >&2 "You don't seem to have 'make' or 'gmake' in your PATH."
        echo >&2 "Cannot proceed."
        exit 1
    fi
    # export MAKE, we need it later in the config.tests
    export MAKE
fi

fi ### help

#-------------------------------------------------------------------------------
# find qmake and check that it is at least 4.6.0
#-------------------------------------------------------------------------------

if [ -z "$OPT_QMAKE" ]; then
    OPT_QMAKE=`$WHICH qmake 2>/dev/null`
    if [ -z "$OPT_QMAKE" ]; then
        echo "$0: could not find qmake; specify the -qmake option"
        exit 1
    fi
fi
QMAKE_VERSION=`$OPT_QMAKE -v 2>/dev/null | grep 'Using Qt version' | \
               sed 's/^Using Qt version //' | \
               sed 's/ in .*$//'`
case "$QMAKE_VERSION" in
    4.0.*|4.1.*|4.2.*|4.3.*|4.4.*|4.5.*) QMAKE_VERSION="" ;;
    4.*) ;;
    *) QMAKE_VERSION="" ;;
esac
if [ -z "$QMAKE_VERSION" ]; then
    echo "$0: $OPT_QMAKE must be at least version 4.6.0"
    echo "Specify the correct qmake binary with the -qmake option"
    exit 1
fi

#-------------------------------------------------------------------------------
# help - interactive parts of the script _after_ this section please
#-------------------------------------------------------------------------------

# next, emit a usage message if something failed.
if [ "$OPT_HELP" = "yes" ]; then
    [ "x$ERROR" = "xyes" ] && echo
    cat <<EOF
Usage:  $relconf [-h] [-qmake <path>] [-no-openclgl] [-verbose]

Configure options:

    -qmake <path> ...... Path to the qmake binary to use.
                         (default is "qmake" on the PATH)

    -no-openclgl ....... Do not use OpenCL/OpenGL interoperability.
 *  -openclgl .......... Use OpenCL/OpenGL interoperability.

    -gcov .............. Use gcov for coverage testing (g++ only).

    -I <string> ........ Add an explicit include path for OpenCL.
    -L <string> ........ Add an explicit library path for OpenCL.
    -l <string> ........ Change the library name for OpenCL.
    -fw <string> ....... Specify the Mac framework for OpenCL
                         (default is "OpenCL").

    -help, -h .......... Display this information.
    -verbose, -v ....... Print verbose information about each
                         step of the configure process.
EOF

   exit 0
fi # Help

#-------------------------------------------------------------------------------
# tests that need qmake
#-------------------------------------------------------------------------------

XQMAKESPEC=""
QMAKE_CONFIG=""

# if we don't have any -l flags, then assume -lOpenCL.
if [ -z "$l_FLAGS" ] ; then
    if [ "$UNAME_SYSTEM" = "Linux" ] ; then
        l_FLAGS=" -lOpenCL"
    fi
    if [ "$PLATFORM_MAC" = "yes" ] ; then
        l_FLAGS=" -framework OpenCL"
    fi
fi

# detect OpenCL
if "$unixtests/compile.test" "$OPT_QMAKE" "$QMAKE_CONFIG" $OPT_VERBOSE "$relpath" "$outpath" config.tests/unix/opencl "opencl" $L_FLAGS $I_FLAGS $l_FLAGS $D_FLAGS; then
    CFG_OPENCL=yes
else
    CFG_OPENCL=no
fi

# detect OpenCL/OpenGL interoperation
if [ "${CFG_OPENCLGL}" = "auto" ]; then
    if "$unixtests/compile.test" "$OPT_QMAKE" "$QMAKE_CONFIG" $OPT_VERBOSE "$relpath" "$outpath" config.tests/unix/openclgl "openclgl" $L_FLAGS $I_FLAGS $l_FLAGS $D_FLAGS; then
	CFG_OPENCLGL=yes
    else
	CFG_OPENCLGL=no
    fi
fi

# detect OpenCL 1.1
if [ "${CFG_OPENCL_1_1}" = "auto" ]; then
    if "$unixtests/compile.test" "$OPT_QMAKE" "$QMAKE_CONFIG" $OPT_VERBOSE "$relpath" "$outpath" config.tests/unix/opencl11 "opencl11" $L_FLAGS $I_FLAGS $l_FLAGS $D_FLAGS; then
	CFG_OPENCL_1_1=yes
    else
	CFG_OPENCL_1_1=no
    fi
fi

#-------------------------------------------------------------------------------
# give feedback on configuration
#-------------------------------------------------------------------------------

echo "Qt version ............. $QMAKE_VERSION"
echo "qmake .................. $OPT_QMAKE"
echo "OpenCL 1.0 ............. $CFG_OPENCL"
echo "OpenCL 1.1 ............. $CFG_OPENCL_1_1"
echo "OpenCL/OpenGL interop .. $CFG_OPENCLGL"
echo "Extra QMAKE_CXXFLAGS ...$D_FLAGS" | sed 's/"//g'
echo "Extra INCLUDEPATH ......$INCLUDEPATH" | sed 's/"//g'
echo "Extra LIBS .............$L_FLAGS$l_FLAGS" | sed 's/"//g'
echo ""

if [ "x$CFG_OPENCL" != "xyes" ] ; then
    echo "Could not detect an OpenCL implementation ... aborting"
    if [ "x$OPT_VERBOSE" = "xno" ] ; then
        echo "Use the -verbose option for more information"
    fi
    exit 1
fi

#-------------------------------------------------------------------------------
# build makefiles based on the configuration
#-------------------------------------------------------------------------------

QMAKE_OPTIONS=""
if [ "x$CFG_OPENCLGL" != "xyes" ] ; then
    QMAKE_OPTIONS="$QMAKE_OPTIONS CONFIG+=no_cl_gl"
fi
if [ "x$CFG_OPENCL_1_1" = "xyes" ] ; then
    QMAKE_OPTIONS="$QMAKE_OPTIONS CONFIG+=opencl_1_1"
fi
if [ "x$CFG_GCOV" = "xyes" ] ; then
    QMAKE_OPTIONS="$QMAKE_OPTIONS LIBS*=-fprofile-arcs"
    QMAKE_OPTIONS="$QMAKE_OPTIONS LIBS*=-ftest-coverage"
    QMAKE_OPTIONS="$QMAKE_OPTIONS QMAKE_CXXFLAGS*=-fprofile-arcs"
    QMAKE_OPTIONS="$QMAKE_OPTIONS QMAKE_CXXFLAGS*=-ftest-coverage"
    QMAKE_OPTIONS="$QMAKE_OPTIONS CONFIG+=gcov"
fi
QMAKE_OPTIONS="$QMAKE_OPTIONS CONFIG+=opencl_configure"

if $OPT_QMAKE $QMAKE_OPTIONS \
        "LIBS*=$L_FLAGS" \
        "LIBS*=$l_FLAGS" \
        "INCLUDEPATH*=$INCLUDEPATH" \
        "QMAKE_CXXFLAGS*=$D_FLAGS" "$relpath/opencl.pro" ; then
    echo "QtOpenCL has been configured.  Run '$MAKE' to build."
    echo ""
    exit 0
else
    exit 1
fi