abinfo "Create compatibility/transitional symlinks..."
ln -sv libisl.so.23 \
    "$PKGDIR"/usr/lib/libisl.so.15
ln -sv libisl.so.23 \
    "$PKGDIR"/usr/lib/libisl.so.19
ln -sv libisl.so.23 \
    "$PKGDIR"/usr/lib/libisl.so.21
ln -sv libisl.so.23 \
    "$PKGDIR"/usr/lib/libisl.so.22
