if [ "$SAGE_LOCAL" = "" ]; then
    echo "SAGE_LOCAL undefined ... exiting";
    echo "Maybe run 'sage -sh'?"
    exit 1
fi

cd src || exit

INCLUDES="-I$SAGE_LOCAL/include/"

if [ "$UNAME" = "CYGWIN" ]; then
    CXXFLAGS="$CXXFLAGS -std=gnu++11"
fi
CXXFLAGS="$CXXFLAGS -fPIC $INCLUDES -L$SAGE_LOCAL/lib"
CPPFLAGS="$INCLUDES"
CONFIGUREFLAGS="--prefix=$SAGE_LOCAL --libdir=$SAGE_LOCAL/lib"

# Allow the user to specify a compiler flag for 64-bit builds.
# This will be -m64 with both Sun Studio and gcc, but other compilers
# such as those from IBM on AIX and HP on HP-UX use different flags.

if [ -z "$CXXFLAG64" ] ; then
    CXXFLAG64=-m64
fi

if [ "x$SAGE64" = xyes ]; then
    echo "Building a 64-bit version of libfplll"
    CXXFLAGS="$CXXFLAGS $CXXFLAG64"
    CPPFLAGS="$CPPFLAGS $CXXFLAG64"
    CXX="$CXX $CXXFLAG64"
fi

if [ "$UNAME" = "CYGWIN" ]; then
    echo "Disable parallel building on Cygwin"
    MAKE="$MAKE -j1"
    export MAKE
    CONFIGUREFLAGS="$CONFIGUREFLAGS --disable-recursive-enum"
fi

if [ "x$SAGE_DEBUG" = "xyes" ]; then
   CXXFLAGS="$CXXFLAGS -O0"
   CONFIGUREFLAGS="$CONFIGUREFLAGS --enable-debug"
else
   CXXFLAGS="$CXXFLAGS -O3"
fi

export CXXFLAGS="$CXXFLAGS"
export CPPFLAGS="$CPPFLAGS"
export CXX="$CXX"

echo "Now configuring fplll..."
./configure $CONFIGUREFLAGS
if [ $? -ne 0 ]; then
    echo "Error configuring fplll"
    exit 1
fi

echo "Now building fplll..."
$MAKE
if [ $? -ne 0 ]; then
    echo "Error building fplll"
    exit 1
fi

echo "Now installing fplll..."
$MAKE install
if [ $? -ne 0 ]; then
    echo "Error installing fplll"
    exit 1
fi


# Pretend that the "libfplll" package is not installed. This is needed to
# support renaming libfplll -> fplll done on Trac #24042
rm -f "$SAGE_SPKG_INST/"libfplll-*
