1 files changed, 29 insertions, 0 deletions

diff --git a/coreutils/tr.c b/coreutils/tr.c
index 6d4cb4a14..f3db3793f 100644
--- a/coreutils/tr.c
+++ b/coreutils/tr.c
@@ -18,6 +18,35 @@
 /* http://www.opengroup.org/onlinepubs/009695399/utilities/tr.html
  * TODO: graph, print
  */
+
+//kbuild:lib-$(CONFIG_TR) += tr.o
+
+//config:config TR
+//config:       bool "tr"
+//config:       default y
+//config:       help
+//config:         tr is used to squeeze, and/or delete characters from standard
+//config:         input, writing to standard output.
+//config:
+//config:config FEATURE_TR_CLASSES
+//config:       bool "Enable character classes (such as [:upper:])"
+//config:       default y
+//config:       depends on TR
+//config:       help
+//config:         Enable character classes, enabling commands such as:
+//config:         tr [:upper:] [:lower:] to convert input into lowercase.
+//config:
+//config:config FEATURE_TR_EQUIV
+//config:       bool "Enable equivalence classes"
+//config:       default y
+//config:       depends on TR
+//config:       help
+//config:         Enable equivalence classes, which essentially add the enclosed
+//config:         character to the current set. For instance, tr [=a=] xyz would
+//config:         replace all instances of 'a' with 'xyz'. This option is mainly
+//config:         useful for cases when no other way of expressing a character
+//config:         is possible.
+
 #include "libbb.h"
 
 enum {