#!/bin/sh

FVISIBILITY_SUPPORT=no
COMPILER=$1
VERBOSE=$2

case "$COMPILER" in
    aCC*)
    ;;
    *)
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

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