+VL_LIB_READLINE
+AS_CASE([$vl_cv_lib_readline], [no], [AC_MSG_ERROR([You need readline])])
+AC_LANG_PUSH([C])
+AM_ICONV
+AS_CASE([$am_cv_func_iconv], [yes], [], [
+ for cy_iconv_prefix_arg in $CFLAGS $CXXFLAGS $OBJCXXFLAGS $LDFLAGS $LIBS; do
+ AS_CASE([$cy_iconv_prefix_arg], [-I*], [
+ AC_LIB_APPENDTOVAR([cy_iconv_prefixes], [`echo $cy_iconv_prefix_arg | sed -e 's/^-I//;s|/include$||'`])
+ ], [-L*], [
+ AC_LIB_APPENDTOVAR([cy_iconv_prefixes], [`echo $cy_iconv_prefix_arg | sed -e 's/^-L//;s|/lib$||'`])
+ ])
+ done
+ for with_libiconv_prefix in $cy_iconv_prefixes; do
+ AS_UNSET([am_cv_func_iconv])
+ AM_ICONV_LINKFLAGS_BODY
+ AM_ICONV
+ done
+])
+AS_CASE([$am_cv_func_iconv], [yes], [], [AC_MSG_ERROR([You need iconv])])
+AC_LANG_POP([C])