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#! /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 || {
		echo 'skipped: GNU nm not found'
		exit 0
	}
	NM='nm --extern-only --defined-only --print-file-name $f'
	;;
esac

# 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.
f=../build_posix/.libs/libwiredtiger.a
test -f $f || {
	echo "skipped: libwiredtiger.a not found"
	exit 0
}

(sed -e '/^#/d' s_symbols.list &&
eval $NM |
sed 's/.* //' |
egrep -v '^__wt') |
sort |
uniq -u > $t

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

exit 0