Document -X option in strace -h output

* strace.c (usage): Mention -X option.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Complements: v4.23~308 "Add user interface for configuring xlat output style"

diff --git a/strace.c b/strace.c
index c99cf63f895f3c45dc318859781aeaf507a5ac52..30dac0e93465780a8336dac063dde125d99b9c91 100644 (file)
--- a/strace.c
+++ b/strace.c
@@ -273,6 +273,7 @@ Output format:\n\
   -T             print time spent in each syscall\n\
   -x             print non-ascii strings in hex\n\
   -xx            print all strings in hex\n\
+  -X format      set the format for printing of named constants and flags\n\
   -y             print paths associated with file descriptor arguments\n\
   -yy            print protocol specific information associated with socket file descriptors\n\
 \n\