AC_HEADER_FIND([asterisk.h], $with_asterisk)
-AC_HEADER_FIND([iconv.h], /usr/include /usr/local/include /opt/local/include)
-+AC_HEADER_FIND([iconv.h], "${TOOLCHAIN_DIR}/include")
++AC_HEADER_FIND([iconv.h], ${CHAN_DONGLE_ICONV_INC})
AC_DEFINE([ICONV_CONST],[], [Define to const if you has iconv() const declaration of input buffer])
AC_MSG_CHECKING([for iconv use const inbuf])