[AC_ARG_WITH([$1],
[AS_HELP_STRING([--with-$1=VALUE], $3)],
if test -n "$withval"; then
- if test "$withval" = "yes" -o "$withval" = "no"; then
+ if test "$withval" = "yes" || test "$withval" = "no"; then
AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
[a value for $1 ($2). Maybe you do...?])
fi