#!/bin/sh

QMKSPEC=$1
VERBOSE=$2
SRCDIR=$3
OUTDIR=$4

# debuggery
[ "$VERBOSE" = "yes" ] && echo "Determining machine byte-order... ($*)"

# build and run a test program
test -d "$OUTDIR/config.tests/unix/endian" || mkdir -p "$OUTDIR/config.tests/unix/endian"
"$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "QT_BUILD_TREE=$OUTDIR" "$SRCDIR/config.tests/unix/endian/endiantest.pro" -o "$OUTDIR/config.tests/unix/endian/Makefile" >/dev/null 2>&1
cd "$OUTDIR/config.tests/unix/endian"


ENDIAN="UNKNOWN"
[ "$VERBOSE" = "yes" ] && $MAKE || $MAKE >/dev/null 2>&1

if [ -f ./endiantest.exe ]; then
    binary=./endiantest.exe
else
    binary=./endiantest
fi


if [ -f $binary ]; then
    : # nop
else
    [ "$VERBOSE" = "yes" ] && echo "Unknown byte order!"
    exit 2
fi

if strings $binary | grep LeastSignificantByteFirst >/dev/null 2>&1; then
    [ "$VERBOSE" = "yes" ] && echo "    Found 'LeastSignificantByteFirst' in binary"
    ENDIAN="LITTLE"
elif strings $binary | grep MostSignificantByteFirst >/dev/null 2>&1; then
    [ "$VERBOSE" = "yes" ] && echo "    Found 'MostSignificantByteFirst' in binary"
    ENDIAN="BIG"
fi

# make clean as this tests is compiled for both the host and the target
$MAKE distclean

# done
if [ "$ENDIAN" = "LITTLE" ]; then
    [ "$VERBOSE" = "yes" ] && echo "Using little endian."
    exit 0
elif [ "$ENDIAN" = "BIG" ]; then
    [ "$VERBOSE" = "yes" ] && echo "Using big endian."
    exit 1
else
    [ "$VERBOSE" = "yes" ] && echo "Unknown byte order!"
    exit 2
fi
