#! /bin/sh

# Check for illegal external symbols.
#
t=__a.c
trap 'rm -f $t; exit 0' 0 1 2 3 13 15

case `uname` in
Darwin)
	NM='nm -gUo $f | egrep " T | D " | sed "s/ _/ /"'
	;;
*)
	# We require GNU nm, which may not be installed.
	type nm > /dev/null 2>&1 &&
	    (nm --version | grep 'GNU nm') > /dev/null 2>&1 || exit 0
	NM='nm --extern-only --defined-only --print-file-name $f'
	;;
esac


check()
{
	(sed -e '/^#/d' s_export.list &&
	eval $NM |
	sed 's/.* //' |
	egrep -v '^__wt') |
	sort |
	uniq -u |
	egrep -v \
	    'zlib_extension_init|lz4_extension_init|snappy_extension_init' > $t

	test -s $t && {
		echo "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="
		echo 'unexpected external symbols in the WiredTiger library'
		echo "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="
		cat $t
		exit 1
	}

	exit 0
}

# This check would normally be done after the library is built, but this way
# we don't forget about a symbol during development.   Check the previously
# built library, if it exists.
for d in .libs build_posix/.libs; do
	f="$d/libwiredtiger.a"
	test -f $f && check $f

	f="../$d/libwiredtiger.a"
	test -f $f && check $f
done

echo "skipped: libwiredtiger.a not found"
exit 0