--- autoconf-2.57/lib/autoconf/general.m4.vns3 2002-11-12 13:54:46 +0300 +++ autoconf-2.57/lib/autoconf/general.m4 2003-09-01 00:12:04 +0400 @@ -2361,6 +2361,7 @@ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT([$4])], [#ifndef $1 char *p = (char *) $1; + (void)p; /* this removes 'unused var' warning */ #endif ])], [AS_VAR_SET(ac_Symbol, yes)],