asterisk/build_tools/strip_nonapi

#!/bin/sh -e

# This script is designed to remove all non-API global symbols from an object
# file. The only global symbols that should be retained are those that belong
# to the official namespace. Unfortunately doing this is platform-specific, as
# the object file manipulation tools are not consistent across platforms.
#
# On platforms where this script does not know what to do, the object file
# will retain non-API global symbols, and this may have unpleasant side effects.
#
# Prefixes that belong to the official namespace are:
#	ast_
#	_ast_
#	__ast_
#	astman_
#	pbx_
#	resample_

FILTER="${GREP} -v -e ^ast_ -e ^_ast_ -e ^__ast_ -e ^astman_ -e ^pbx_ -e ^resample_"

case "${PROC}" in
	powerpc64)
		TEXTSYM=" D "
		;;
	*)
		TEXTSYM=" T "
		;;
esac

case "${OSARCH}" in
    linux-gnu|FreeBSD)
	nm ${1} | ${GREP} -e "$TEXTSYM" | cut -d" " -f3 | ${FILTER} > striplist
	sed -e "s/^/-N /" striplist | xargs -n 40 ${STRIP} ${1}
	rm -f striplist
	;;
    *)
	;;
esac