AC_DEFUN([RUBY_WERROR_FLAG], [dnl save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $rb_cv_warnflags" AS_IF([test "${ac_c_werror_flag+set}"], [ rb_c_werror_flag="$ac_c_werror_flag" ], [ unset rb_c_werror_flag ]) ac_c_werror_flag=yes $1 CFLAGS="$save_CFLAGS" save_CFLAGS= AS_IF([test "${rb_c_werror_flag+set}"], [ ac_c_werror_flag="$rb_c_werror_flag" ], [ unset ac_c_werror_flag ])])dnl