1 files changed, 18 insertions, 4 deletions

diff --git a/miscutils/dc.c b/miscutils/dc.c
index 4d92bc3d0..2b77cd614 100644
--- a/miscutils/dc.c
+++ b/miscutils/dc.c
@@ -2,10 +2,20 @@
 /*
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
-
-#include "libbb.h"
-#include "common_bufsiz.h"
-#include <math.h>
+//config:config DC
+//config:       bool "dc"
+//config:       default y
+//config:       help
+//config:         Dc is a reverse-polish desk calculator which supports unlimited
+//config:         precision arithmetic.
+//config:
+//config:config FEATURE_DC_LIBM
+//config:       bool "Enable power and exp functions (requires libm)"
+//config:       default y
+//config:       depends on DC
+//config:       help
+//config:         Enable power and exp functions.
+//config:         NOTE: This will require libm to be present for linking.
 
 //usage:#define dc_trivial_usage
 //usage:       "EXPRESSION..."
@@ -30,6 +40,10 @@
 //usage:       "$ echo 72 9 div 8 mul p | dc\n"
 //usage:       "64\n"
 
+#include "libbb.h"
+#include "common_bufsiz.h"
+#include <math.h>
+
 #if 0
 typedef unsigned data_t;
 #define DATA_FMT ""