AC_LIBTOOL_DLOPEN
AC_PROG_LIBTOOL
AC_HEADER_TIOCGWINSZ
+
+AC_CHECK_SIZEOF([ptrdiff_t])
+binary_width=`expr 8 '*' $ac_cv_sizeof_ptrdiff_t`
+AC_SUBST([binary_width])
+
+
PKG_PROG_PKG_CONFIG
m4_pattern_forbid([PKG_CHECK_MODULES])
PSPP_CHECK_CLICKSEQUENCE