configure

#!/bin/sh
#############################################################################
##
## Copyright (C) 2016 The Qt Company Ltd.
## Copyright (C) 2016 Intel Corporation.
## Contact: https://www.qt.io/licensing/
##
## This file is the build configuration utility of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:GPL-EXCEPT$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3 as published by the Free Software
## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
## included in the packaging of this file. Please review the following
## information to ensure the GNU General Public License requirements will
## be met: https://www.gnu.org/licenses/gpl-3.0.html.
##
## $QT_END_LICENSE$
##
#############################################################################

#-------------------------------------------------------------------------------
# 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`

WHICH="which"

PERL=
findPerl()
{
PERL=`$WHICH perl 2>/dev/null`
}

# find out which awk we want to use, prefer gawk, then nawk, then regular awk
AWK=
findAwk()
{
for e in gawk nawk awk; do
    if "$WHICH" $e >/dev/null 2>&1 && ( $e -f /dev/null /dev/null ) >/dev/null 2>&1; then
        AWK=$e
        break
    fi
done
}

# find a make command
findMake()
{
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
}

# make sure qmake is not confused by these. recursion via Makefiles would
# be still affected, so just unsetting them here is not an option.
checkQMakeEnv()
{
if [ -n "$QMAKESPEC" ] || [ -n "$XQMAKESPEC" ] || \
        [ -n "$QMAKEPATH" ] || [ -n "$QMAKEFEATURES" ]; then
    echo >&2 "Please make sure to unset the QMAKESPEC, XQMAKESPEC, QMAKEPATH,"
    echo >&2 "and QMAKEFEATURES environment variables prior to building Qt."
    exit 1
fi
}

# do this early so we don't store it in config.status
CFG_TOPLEVEL=
outpathPrefix=

checkTopLevelBuild()
{
    relpathMangled=$relpath
    if [ x"$1" = x"-top-level" ]; then
        CFG_TOPLEVEL=yes
        relpathMangled=`dirname "$relpath"`
        outpathPrefix=../
    else
        if [ -f ../.qmake.super ]; then
            echo >&2 "ERROR: You cannot configure qtbase separately within a top-level build."
            exit 1
        fi
    fi
}

CMAKE_CMDLINE=
getCMakeCmdLine()
{
PASSTHRU=
set -f  # suppress globbing in for loop
SAVED_IFS=$IFS
IFS='
'

if [ "$CFG_DEV" = "yes" ]; then
    CMAKE_CMDLINE="$CMAKE_CMDLINE
-DFEATURE_developer_build=ON"
    CMAKE_CMDLINE="$CMAKE_CMDLINE
-DBUILD_TESTING=ON"
    CMAKE_CMDLINE="$CMAKE_CMDLINE
-DBUILD_EXAMPLES=ON"
fi

if [ "$CMAKE_MAKEFILES" = "no" ]; then
       CMAKE_CMDLINE="$CMAKE_CMDLINE
-G Ninja"
fi

for i in "$@"; do
    if [ "$PASSTHRU" = "yes" ]; then
        CMAKE_CMDLINE="$CMAKE_CMDLINE
$i"
    else
        case $i in
            -feature-*)
                VAR=`echo $i | sed 's,^-feature-\(.*\),\1,'`
                CMAKE_CMDLINE="$CMAKE_CMDLINE
-DQT_FEATURE_${VAR}=ON"
                ;;
            -no-feature-*)
                VAR=`echo $i | sed 's,^-no-feature-\(.*\),\1,'`
                CMAKE_CMDLINE="$CMAKE_CMDLINE
-DQT_FEATURE_${VAR}=OFF"
                ;;
            --no-*)
                VAR=`echo $i | sed 's,^--no-\(.*\),\1,'`
                CMAKE_CMDLINE="$CMAKE_CMDLINE
-DFEATURE_${VAR}=OFF"
                ;;
            -no-*)
                VAR=`echo $i | sed 's,^-no-\(.*\),\1,'`
                CMAKE_CMDLINE="$CMAKE_CMDLINE
-DFEATURE_${VAR}=OFF"
                ;;
            --)
                PASSTHRU=yes
                ;;
            *)
                ;;
        esac
    fi
done
set +f
IFS=$SAVED_IFS
}

OPT_CMDLINE=  # expanded version for the script
QMAKE_CMDLINE=  # verbatim version for qmake call
getOptAndQMakeCmdLines()
{
set -f  # suppress globbing in for loop
SAVED_IFS=$IFS
IFS='
'
for i in "$@"; do
    if [ x"$i" = x"-top-level" ]; then
        continue
    fi
    case $i in
        -redo|--redo)
            optfile=${outpathPrefix}config.opt
            if test -n "$CFG_TOPLEVEL" && ! test -f $optfile; then
                optfile=config.opt
            fi
            if ! test -f $optfile; then
                echo >&2 "No config.opt present - cannot redo configuration."
                exit 1
            fi
            for a in `cat $optfile`; do
                OPT_CMDLINE="$OPT_CMDLINE
$a"
            done
            ;;
        *)
            OPT_CMDLINE="$OPT_CMDLINE
$i"
            ;;
    esac
    QMAKE_CMDLINE="$QMAKE_CMDLINE
$i"
done
set --
for i in $OPT_CMDLINE; do
    set -- "$@" "$i"
done
set +f
IFS=$SAVED_IFS
}

#-------------------------------------------------------------------------------
# utility functions
#-------------------------------------------------------------------------------

# Helper function for getQMakeConf. It parses include statements in
# qmake.conf and prints out the expanded file
expandQMakeConf()
{
    while read line; do case "$line" in
        include*)
            inc_file=`echo "$line" | sed -n -e '/^include.*(.*)/s/include.*(\(.*\)).*$/\1/p'`
	    current_dir=`dirname "$1"`
	    conf_file="$current_dir/$inc_file"
	    if [ ! -f  "$conf_file" ]; then
                echo "WARNING: Unable to find file $conf_file" >&2
                continue
            fi
            expandQMakeConf "$conf_file"
        ;;
        *)
            echo "$line"
        ;;
    esac; done < "$1"
}

extractQMakeVariables()
{
    LC_ALL=C $AWK '
BEGIN {
    values["LITERAL_WHITESPACE"] = " "
    values["LITERAL_DOLLAR"] = "$"
}
/^[_A-Z0-9.]+[ \t]*\+?=/ {
    valStart = index($0, "=") + 1

    append = 0
    if (substr($0, valStart - 2, 1) == "+") {
        append = 1
    }

    variable = substr($0, 0, valStart - 2 - append)
    value = substr($0, valStart)
    gsub("[ \t]+", "", variable)
    gsub("^[ \t]+", "", value)
    gsub("[ \t]+$", "", value)

    ovalue = ""
    while (match(value, /\$\$(\{[_A-Z0-9.]+\}|[_A-Z0-9.]+)/)) {
        ovalue = ovalue substr(value, 1, RSTART - 1)
        var = substr(value, RSTART + 2, RLENGTH - 2)
        value = substr(value, RSTART + RLENGTH)
        if (var ~ /^\{/) {
            var = substr(var, 2, length(var) - 2)
        }
        ovalue = ovalue values[var]
    }
    value = ovalue value

    ovalue = ""
    while (match(value, /\$\$system\(("[^"]*"|[^)]*)\)/)) {
        ovalue = ovalue substr(value, 1, RSTART - 1)
        cmd = substr(value, RSTART + 9, RLENGTH - 10)
        gsub(/^"|"$/, "", cmd)
        value = substr(value, RSTART + RLENGTH)
        while ((cmd | getline line) > 0) {
            ovalue = ovalue line
        }
        close(cmd)
    }
    value = ovalue value

    combinedValue = values[variable]
    if (append == 1 && length(combinedValue) > 0) {
        combinedValue = combinedValue " " value
    } else {
        combinedValue = value
    }
    values[variable] = combinedValue
}
END {
    for (var in values) {
        print var "=" values[var]
    }
}
'
}

getSingleQMakeVariable()
{
    echo "$2" | $AWK "/^($1)=/ { print substr(\$0, index(\$0, \"=\") + 1) }"
}

macSDKify()
{
    # Normally we take care of sysrootifying in sdk.prf, but configure extracts some
    # values before qmake is even built, so we have to duplicate the logic here.

    sdk=$(getSingleQMakeVariable "QMAKE_MAC_SDK" "$1")
    if [ -z "$sdk" ]; then echo "QMAKE_MAC_SDK must be set when building on Mac" >&2; exit 1; fi
    sysroot=$(/usr/bin/xcrun --sdk $sdk --show-sdk-path 2>/dev/null)
    if [ -z "$sysroot" ]; then echo "Failed to resolve SDK path for '$sdk'" >&2; exit 1; fi

    case "$sdk" in
        macosx*)
            version_min_flag="-mmacosx-version-min=$(getSingleQMakeVariable QMAKE_MACOSX_DEPLOYMENT_TARGET "$1")"
        ;;
        iphoneos*)
            version_min_flag="-miphoneos-version-min=$(getSingleQMakeVariable QMAKE_IOS_DEPLOYMENT_TARGET "$1")"
        ;;
        iphonesimulator*)
            version_min_flag="-mios-simulator-version-min=$(getSingleQMakeVariable QMAKE_IOS_DEPLOYMENT_TARGET "$1")"
        ;;
        appletvos*)
            version_min_flag="-mappletvos-version-min=$(getSingleQMakeVariable QMAKE_TVOS_DEPLOYMENT_TARGET "$1")"
        ;;
        appletvsimulator*)
            version_min_flag="-mtvos-simulator-version-min=$(getSingleQMakeVariable QMAKE_TVOS_DEPLOYMENT_TARGET "$1")"
        ;;
        watchos*)
            version_min_flag="-mwatchos-version-min=$(getSingleQMakeVariable QMAKE_WATCHOS_DEPLOYMENT_TARGET "$1")"
        ;;
        watchsimulator*)
            version_min_flag="-mwatchos-simulator-version-min=$(getSingleQMakeVariable QMAKE_WATCHOS_DEPLOYMENT_TARGET "$1")"
        ;;
        *)
        ;;
    esac

    echo "$1" | while read line; do
        case "$line" in
            QMAKE_CC=*|QMAKE_CXX=*|QMAKE_FIX_RPATH=*|QMAKE_AR=*|QMAKE_RANLIB=*|QMAKE_LINK=*|QMAKE_LINK_SHLIB=*)
                # Prefix tool with toolchain path
                var=$(echo "$line" | cut -d '=' -f 1)
                val=$(echo "$line" | cut -d '=' -f 2-)
                sdk_val=$(/usr/bin/xcrun -sdk $sdk -find $(echo $val | cut -d ' ' -f 1))
                val=$(echo $sdk_val $(echo $val | cut -s -d ' ' -f 2-))
                echo "$var=$val"
            ;;
            QMAKE_CFLAGS=*|QMAKE_CXXFLAGS=*)
                echo "$line -isysroot $sysroot $version_min_flag"
            ;;
            QMAKE_LFLAGS=*)
                echo "$line -Wl,-syslibroot,$sysroot $version_min_flag"
            ;;
            *)
                echo "$line"
            ;;
        esac
    done
}

# relies on $QMAKESPEC being set correctly. parses include statements in
# qmake.conf and prints out the expanded file
getQMakeConf()
{
    if [ -z "$specvals" ]; then
        specvals=`expandQMakeConf "$QMAKESPEC/qmake.conf" | extractQMakeVariables`
        if [ "$BUILD_ON_MAC" = "yes" ]; then specvals=$(macSDKify "$specvals"); fi
    fi
    getSingleQMakeVariable "$1" "$specvals"
}

#-------------------------------------------------------------------------------
# operating system detection
#-------------------------------------------------------------------------------
detectOperatingSystem()
{
# 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

BUILD_ON_MAC=no
if [ -d /System/Library/Frameworks/Cocoa.framework ]; then
    BUILD_ON_MAC=yes
fi
if [ "$OSTYPE" = "msys" ]; then
    relpath=`(cd "$relpath"; pwd -W)`
    outpath=`pwd -W`
fi
}
#-------------------------------------------------------------------------------
# Verify Xcode installation on Mac OS
#-------------------------------------------------------------------------------
maybeVerifyXcode()
{
if [ "$BUILD_ON_MAC" = "yes" ]; then
    if ! /usr/bin/xcode-select --print-path >/dev/null 2>&1; then
        echo >&2
        echo "   No Xcode selected. Please install Xcode via the App Store, " >&2
        echo "   or the command line developer tools via xcode-select --install, " >&2
        echo "   and use xcode-select --switch to choose the right installation. " >&2
        echo "   See the xcode-select man page for more information." >&2
        echo >&2
        exit 2
    fi

    # In the else case we are probably using a Command Line Tools installation
    if /usr/bin/xcrun -find xcodebuild >/dev/null 2>&1; then
        if ! /usr/bin/xcrun xcodebuild -license check 2>/dev/null; then
            echo >&2
            echo "   Xcode setup not complete. You need to confirm the license" >&2
            echo "   agreement by running 'sudo xcrun xcodebuild -license accept'." >&2
            echo >&2
            exit 2
        fi
    fi
fi
}
#-----------------------------------------------------------------------------
# Qt version detection
#-----------------------------------------------------------------------------
QT_VERSION=
QT_MAJOR_VERSION=
QT_MINOR_VERSION=0
QT_PATCH_VERSION=0
detectQtVersion()
{
eval `sed -n -e 's/^MODULE_VERSION = \(\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*\)$/QT_VERSION=\1\
    QT_MAJOR_VERSION=\2\
    QT_MINOR_VERSION=\3\
    QT_PATCH_VERSION=\4/p' < "$relpath"/.qmake.conf`
if [ -z "$QT_MAJOR_VERSION" ]; then
   echo "Cannot process version from .qmake.conf"
   echo "Cannot proceed."
   exit 1
fi
}
#-------------------------------------------------------------------------------
# initialize variables
#-------------------------------------------------------------------------------

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

# initalize internal variables
CFG_RELEASE_TOOLS=no
PLATFORM=
OPT_SHADOW=maybe
OPT_VERBOSE=no
OPT_HELP=
CFG_SILENT=no
CFG_DEV=no
BUILD_WITH_CMAKE=no
CMAKE_MAKEFILES=no

#-------------------------------------------------------------------------------
# parse command line arguments
#-------------------------------------------------------------------------------
parseCommandline()
{
# parse the arguments, setting things to "yes" or "no"
while [ "$#" -gt 0 ]; do
    CURRENT_OPT="$1"
    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 plugin options
    -no-*-*|-plugin-*-*|-qt-*-*)
        VAR=`echo $1 | sed 's,^-[^-]*-\(.*\),\1,'`
        VAL=`echo $1 | sed 's,^-\([^-]*\).*,\1,'`
        ;;
    #Qt style no options
    -no-*)
        VAR=`echo $1 | sed 's,^-no-\(.*\),\1,'`
        VAL=no
        ;;
    #Qt style options that pass an argument
    -prefix| \
    -docdir| \
    -headerdir| \
    -plugindir| \
    -qmldir| \
    -archdatadir| \
    -datadir| \
    -libdir| \
    -bindir| \
    -libexecdir| \
    -translationdir| \
    -sysconfdir| \
    -examplesdir| \
    -testsdir| \
    -hostdatadir| \
    -hostbindir| \
    -hostlibdir| \
    -extprefix| \
    -sysroot| \
    -external-hostbindir| \
    -make| \
    -nomake| \
    -skip| \
    -platform| \
    -xplatform| \
    -device| \
    -device-option| \
    -sdk| \
    -android-sdk| \
    -android-ndk| \
    -android-ndk-platform| \
    -android-ndk-host| \
    -android-arch)
        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,'`
        ;;
    #Qt Builtin/System style options
    -no-*|-system-*|-qt-*)
        VAR=`echo $1 | sed 's,^-[^-]*-\(.*\),\1,'`
        VAL=`echo $1 | sed 's,^-\([^-]*\)-.*,\1,'`
        ;;
    #Options that cannot be generalized
    -hostprefix)
        VAR=`echo $1 | sed 's,^-\(.*\),\1,'`
        # this option may or may not be followed by an argument
        if [ -z "$2" ] || echo "$2" | grep '^-' >/dev/null 2>&1; then
            VAL=$outpath
        else
            shift;
            VAL=$1
        fi
	;;
    #General options, including Qt style yes options
    -*)
        VAR=`echo $1 | sed 's,^-\(.*\),\1,'`
        VAL="yes"
        ;;
    # most options don't need processing in the configure script, skip them. qmake will do the real validation
    *)
        shift
        continue
        ;;
    esac

    shift

    UNKNOWN_OPT=no
    case "$VAR" in
    external-hostbindir)
        CFG_HOST_QT_TOOLS_PATH="$VAL"
        ;;
    platform)
        PLATFORM="$VAL"
        ;;
    optimized-qmake|optimized-tools)
        if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
            CFG_RELEASE_TOOLS="$VAL"
        fi
        ;;
    developer-build)
        CFG_DEV="yes"
        ;;
    h|help)
        if [ "$VAL" = "yes" ]; then
            OPT_HELP="$VAL"
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    v|verbose)
        if [ "$VAL" = "yes" ]; then
            OPT_VERBOSE=yes
        elif [ "$VAL" = "no" ]; then
            OPT_VERBOSE=no
        else
            UNKNOWN_OPT=yes
        fi
        ;;
    silent)
        # need to keep this here, to ensure qmake is built silently
        CFG_SILENT="$VAL"
        ;;
    cmake)
        BUILD_WITH_CMAKE=yes
        ;;
    cmake-makefiles)
        BUILD_WITH_CMAKE=yes
        CMAKE_MAKEFILES=yes
        ;;
    *)
        ;;
    esac
    if [ "$UNKNOWN_OPT" = "yes" ]; then
        echo "${CURRENT_OPT}: invalid command-line switch"
        ERROR=yes
    fi
done
[ "x$ERROR" = "xyes" ] && exit 1
}
#-------------------------------------------------------------------------------
# help - interactive parts of the script _after_ this section please
#-------------------------------------------------------------------------------
handleHelp()
{
if [ "$OPT_HELP" = "yes" ]; then
    cat $relpath/config_help.txt
    if [ -n "$CFG_TOPLEVEL" ]; then
        IFS='
'
        for i in $relpathMangled/qt*/config_help.txt; do
            if [ x"$i" != x"$relpath/config_help.txt" ]; then
                echo
                cat "$i"
            fi
        done
    fi
    exit 0
fi
}
#-------------------------------------------------------------------------------
# platform detection
#-------------------------------------------------------------------------------
PLATFORM_NOTES=
detectPlatform()
{
if [ -z "$PLATFORM" ]; then
    case "$UNAME_SYSTEM:$UNAME_RELEASE" in
     Darwin:*)
        PLATFORM=macx-clang
        ;;
     AIX:*)
        #PLATFORM=aix-g++
        PLATFORM=aix-g++-64
        PLATFORM_NOTES="AIX: aix-g++ aix-g++-64"
        ;;
     GNU:*)
        PLATFORM=hurd-g++
        ;;
     FreeBSD:*)
        if [ "$(uname -r | cut -d. -f1)" -ge 10 ]; then
            PLATFORM=freebsd-clang
            PLATFORM_NOTES="FreeBSD: freebsd-g++"
        else
            PLATFORM=freebsd-g++
            PLATFORM_NOTES="FreeBSD: freebsd-clang"
        fi
        ;;
     OpenBSD:*)
        PLATFORM=openbsd-g++
        ;;
     NetBSD:*)
        PLATFORM=netbsd-g++
        ;;
     HP-UX:*)
        case "$UNAME_MACHINE" in
            ia64)
                PLATFORM=hpuxi-g++-64
            ;;
        esac
        ;;
     Linux:*)
        PLATFORM=linux-g++
        PLATFORM_NOTES="Linux: linux-clang linux-icc"
        ;;
     SunOS:5*)
        #PLATFORM=solaris-g++-64
        PLATFORM=solaris-cc
        #PLATFORM=solaris-cc64
        PLATFORM_NOTES="Solaris: solaris-g++-64 solaris-cc-64"
        ;;
     CYGWIN*:*)
        PLATFORM=cygwin-g++
        ;;
     LynxOS*:*)
        PLATFORM=lynxos-g++
        ;;
     QNX:*)
        PLATFORM=unsupported/qnx-g++
        ;;
     *)
            echo >&2
            echo "   The build script does not currently recognize all" >&2
            echo "   platforms supported by Qt." >&2
            echo "   Rerun this script with a -platform option listed to" >&2
            echo "   set the system/compiler combination you use." >&2
            echo >&2
            exit 2
    esac
fi
echo "$PLATFORM_NOTES" > "${outpathPrefix}.config.notes"
}

#-------------------------------------------------------------------------------
# command line and environment validation
#-------------------------------------------------------------------------------
validateEnv()
{
if [ -d "$PLATFORM" ]; then
  QMAKESPEC="$PLATFORM"
else
  QMAKESPEC="$relpath/mkspecs/${PLATFORM}"
fi

if [ "$BUILD_ON_MAC" = "yes" ]; then
   if [ `basename $QMAKESPEC` = "macx-xcode" ]; then
      echo >&2
      echo "   Platform 'macx-xcode' should not be used when building Qt/Mac." >&2
      echo "   Please build Qt/Mac with 'macx-clang' or 'macx-g++', then use" >&2
      echo "   the 'macx-xcode' spec for your application, and it will link to" >&2
      echo "   the Qt/Mac build using the settings of the original mkspec." >&2
      echo >&2
      exit 2
    fi
fi

# check specified platforms are supported
if [ '!' -d "$QMAKESPEC" ]; then
    echo
    echo "   The specified system/compiler is not supported:"
    echo
    echo "      $QMAKESPEC"
    echo
    echo "   Please see the README file for a complete list."
    echo
    exit 2
fi
}
#-------------------------------------------------------------------------------
# build tree initialization
#-------------------------------------------------------------------------------
initBuildTree()
{
# is this a shadow build?
if [ "$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
if [ "$OPT_SHADOW" = "yes" ]; then
    if [ -f "$relpath/.qmake.cache" -o -f "$relpath/src/corelib/global/qconfig.h" -o -f "$relpath/src/corelib/global/qconfig.cpp" ]; then
        echo >&2 "You cannot make a shadow build from a source tree containing a previous build."
        echo >&2 "Cannot proceed."
        exit 1
    fi
    [ "$OPT_VERBOSE" = "yes" ] && echo "Performing shadow build..."
fi

if [ "$OPT_SHADOW" = "yes" ]; then
    echo "Preparing build tree..."

    [ -d "$outpath/bin" ] || mkdir -p "$outpath/bin"

    mkdir -p "$outpath/mkspecs"
fi
}

# $1: input variable name (awk regexp)
# $2: optional output variable name
# $3: optional value transformation (sed command)
# relies on $QMAKESPEC, $COMPILER_CONF and $mkfile being set correctly, as the latter
# is where the resulting variable is written to
setBootstrapVariable()
{
    getQMakeConf "$1" | echo ${2-$1} = `if [ -n "$3" ]; then sed "$3"; else cat; fi` >> "$mkfile"
}

# -----------------------------------------------------------------------------
# build qmake
# -----------------------------------------------------------------------------

buildQMake()
{
# symlink includes
if [ -e "$relpath/.git" ]; then
    if [ -z "$PERL" ]; then
        echo
        echo "You need perl in your PATH to make a build from GIT."
        echo "Cannot proceed."
        exit 1
    fi

    "$relpath/bin/syncqt.pl" -version $QT_VERSION -minimal -module QtCore "$relpath" || exit 1
fi
# build qmake
    echo "Creating qmake..."
    mkdir -p "$outpath/qmake" || exit

        in_mkfile=$relpath/qmake/Makefile.unix
        mkfile=$outpath/qmake/Makefile
        if [ -f "$mkfile" ]; then
            [ "$CFG_DEV" = "yes" ] && "$WHICH" chflags >/dev/null 2>&1 && chflags nouchg "$mkfile"
            rm -f "$mkfile"
        fi

        echo "########################################################################" > "$mkfile"
        echo "## This file was autogenerated by configure, all changes will be lost ##" >> "$mkfile"
        echo "########################################################################" >> "$mkfile"
        EXTRA_CXXFLAGS="\$(QMAKE_CXXFLAGS) \$(QMAKE_CXXFLAGS_CXX1Z) \$(QMAKE_CXXFLAGS_SPLIT_SECTIONS)"
        EXTRA_LFLAGS="\$(QMAKE_LFLAGS) \$(QMAKE_LFLAGS_GCSECTIONS)"

        [ "$CFG_SILENT" = "yes" ] && CC_TRANSFORM='s,^,\@,' || CC_TRANSFORM=
        setBootstrapVariable QMAKE_CC CC "$CC_TRANSFORM"
        setBootstrapVariable QMAKE_CXX CXX "$CC_TRANSFORM"
        setBootstrapVariable QMAKE_CXXFLAGS
        setBootstrapVariable QMAKE_CXXFLAGS_CXX1Z
        setBootstrapVariable QMAKE_CXXFLAGS_SPLIT_SECTIONS
        setBootstrapVariable QMAKE_LFLAGS
        setBootstrapVariable QMAKE_LFLAGS_GCSECTIONS

        if [ "$CFG_DEBUG" = "no" ] || [ "$CFG_RELEASE_TOOLS" = "yes" ]; then
            setBootstrapVariable QMAKE_CXXFLAGS_RELEASE
            EXTRA_CXXFLAGS="$EXTRA_CXXFLAGS \$(QMAKE_CXXFLAGS_RELEASE)"
        else
            setBootstrapVariable QMAKE_CXXFLAGS_DEBUG
            EXTRA_CXXFLAGS="$EXTRA_CXXFLAGS \$(QMAKE_CXXFLAGS_DEBUG)"
        fi

	adjrelpath=`echo "$relpath" | sed 's/ /\\\\\\\\ /g'`
	adjoutpath=`echo "$outpath" | sed 's/ /\\\\\\\\ /g'`
	adjqmakespec=`echo "$QMAKESPEC" | sed 's/ /\\\\\\\\ /g'`

        echo "BUILD_PATH = .." >> "$mkfile"
        echo "SOURCE_PATH = $adjrelpath" >> "$mkfile"
        if [ -e "$relpath/.git" ]; then
            echo 'INC_PATH = $(BUILD_PATH)/include' >> "$mkfile"
        else
            echo 'INC_PATH = $(SOURCE_PATH)/include' >> "$mkfile"
        fi
        echo "QMAKESPEC = $adjqmakespec" >> "$mkfile"
        echo "QT_VERSION = $QT_VERSION" >> "$mkfile"
        echo "QT_MAJOR_VERSION = $QT_MAJOR_VERSION" >> "$mkfile"
        echo "QT_MINOR_VERSION = $QT_MINOR_VERSION" >> "$mkfile"
        echo "QT_PATCH_VERSION = $QT_PATCH_VERSION" >> "$mkfile"
        echo "CONFIG_CXXFLAGS = $EXTRA_CXXFLAGS" >> "$mkfile"
        echo "CONFIG_LFLAGS = $EXTRA_LFLAGS" >> "$mkfile"
        echo "RM_F = rm -f" >> "$mkfile"
        echo "RM_RF = rm -rf" >> "$mkfile"

        case `basename "$PLATFORM"` in
        win32-*g++*)
            cat "$in_mkfile.win32" >> "$mkfile"
            ;;
        *)
            cat "$in_mkfile.unix" >> "$mkfile"
            if [ "$BUILD_ON_MAC" = "yes" ]; then
                cat "$in_mkfile.macos" >> "$mkfile"
            fi
            ;;
        esac
        echo >>"$mkfile"

        if [ "$BUILD_ON_MAC" = "yes" ]; then
            echo "EXTRA_CXXFLAGS += -MMD" >> "$mkfile"
            cat "$in_mkfile" >> "$mkfile"
            echo "-include \$(notdir \$(DEPEND_SRC:%.cpp=%.d))" >> "$mkfile"
        else
            cat "$in_mkfile" >> "$mkfile"
            if "$WHICH" makedepend >/dev/null 2>&1 && grep 'depend:' "$mkfile" >/dev/null 2>&1; then
                (cd "$outpath/qmake" && "$MAKE" -f "$mkfile" depend) >/dev/null 2>&1
                sed 's,^.*/\([^/]*.o\):,\1:,g' "$mkfile" >"$mkfile.tmp"
                sed "s,$outpath,$adjoutpath,g" "$mkfile.tmp" >"$mkfile"
                rm "$mkfile.tmp"
            fi
        fi

    if [ "$OPT_VERBOSE" = yes ]; then
        # Show the output of make
        (cd "$outpath/qmake"; "$MAKE") || exit 2
    else
        # Hide the output of make
        # Use bash to print dots, if we have it, and stdout is a tty.
        if test -t 1 && $WHICH bash > /dev/null 2>/dev/null; then
            bash -c 'set -o pipefail
                cd "$0/qmake"; "$1" | while read line; do
                    builtin echo -n .
                done' "$outpath" "$MAKE" || exit 2
        else
            (cd "$outpath/qmake"; "$MAKE" -s) || exit 2
        fi
        echo "Done."
    fi
}

#-------------------------------------------------------------------------------
# create a qt.conf for the Qt build tree itself
#-------------------------------------------------------------------------------

createQtConf()
{
# Note that this file is just sufficient to boot configure, by which it is
# replaced in-place with a version which is suitable for building all of Qt.
QTCONFFILE="$outpath/bin/qt.conf"
cat > "$QTCONFFILE" <<EOF
[EffectivePaths]
Prefix=..
[Paths]
TargetSpec=dummy
HostSpec=$PLATFORM
EOF
if [ x"$relpath" != x"$outpath" ]; then
    cat >> "$QTCONFFILE" <<EOF
[EffectiveSourcePaths]
Prefix=$relpath
EOF
fi
}

#-------------------------------------------------------------------------------
# configure and build top-level makefile
#-------------------------------------------------------------------------------
createToplevelMakefile()
{
# recreate command line for qmake
set -f
SAVED_IFS=$IFS
IFS='
'
for i in $QMAKE_CMDLINE; do
    set -- "$@" "$i"
done
set +f
IFS=$SAVED_IFS

if [ -n "$CFG_TOPLEVEL" ]; then
    cd ..
fi

if [ -n "$CFG_HOST_QT_TOOLS_PATH" ]; then
    "$CFG_HOST_QT_TOOLS_PATH/qmake" -qtconf "$QTCONFFILE" "$relpathMangled" -- "$@"
else
    "$outpath/bin/qmake" "$relpathMangled" -- "$@"
fi
}

runCMake()
{
# recreate command line for cmake
set -f
SAVED_IFS=$IFS
IFS='
'
for i in $CMAKE_CMDLINE; do
    set -- $* "$i"
done
set +f
IFS=$SAVED_IFS
cmake $* "$relpath"
}

parseCommandline "$@"
handleHelp
if [ "$BUILD_WITH_CMAKE" = "yes" ]; then
    getCMakeCmdLine $@
    runCMake
else
    findPerl
    findAwk
    findMake
    checkQMakeEnv
    checkTopLevelBuild "$@"
    getOptAndQMakeCmdLines "$@"
    detectOperatingSystem
    maybeVerifyXcode
    detectQtVersion
    detectPlatform
    validateEnv
    initBuildTree
    buildQMake
    createQtConf
    createToplevelMakefile
fi