#!/bin/sh

FVISIBILITY_SUPPORT=no

COMPILER=$1

VERBOSE=$2

RunCompileTest() {

    cat >>fvisibility.c << EOF

__attribute__((visibility("default"))) void blah();

#if !defined(__GNUC__)

# error "Visiblility support requires GCC"

#elif __GNUC__ < 4

# error "GCC3 with backported visibility patch is known to miscompile Qt"

#endif

EOF

    if [ "$VERBOSE" = "yes" ] ; then

        "$COMPILER" -c -fvisibility=hidden fvisibility.c && FVISIBILITY_SUPPORT=yes

    else

        "$COMPILER" -c -fvisibility=hidden fvisibility.c >/dev/null 2>&1 && FVISIBILITY_SUPPORT=yes

    fi

    rm -f fvisibility.c fvisibility.o

}

case "$COMPILER" in

aCC*)

    ;;

icpc)

    ICPC_VERSION=`icpc -dumpversion`

    case "$ICPC_VERSION" in

    8.*|9.*|10.0)

        # 8.x, 9.x, and 10.0 don't support symbol visibility

        ;;

    *)

        # the compile test works for the intel compiler because it mimics gcc's behavior

        RunCompileTest

        ;;

    esac

    ;;

    *)

    RunCompileTest

    ;;

esac

# done

if [ "$FVISIBILITY_SUPPORT" != "yes" ]; then

    [ "$VERBOSE" = "yes" ] && echo "Symbol visibility control disabled."

    exit 0

else

    [ "$VERBOSE" = "yes" ] && echo "Symbol visibility control enabled."

    exit 1

fi