cpio: optional support for writing cpio files in newc format.

by pascal.bellard AT ads-lu.com.

function                                             old     new   delta
cpio_main                                            247    1122    +875
cpio_pad4                                              -      58     +58
gnu_dev_major                                         66      99     +33
gnu_dev_minor                                         38      57     +19
packed_usage                                       23964   23978     +14
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/0 up/down: 999/0)             Total: 999 bytes

1 files changed, 9 insertions, 2 deletions

diff --git a/include/usage.h b/include/usage.h
index 529a228ec..0849c6831 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -509,13 +509,20 @@
      "\n        -l,-s   Create (sym)links" \
 
 #define cpio_trivial_usage \
-       "-[dimtuv][F cpiofile]"
+       "-[dim" USE_FEATURE_CPIO_O("o") "tuv][F cpiofile]" \
+       USE_FEATURE_CPIO_O( "[H newc]" ) 
 #define cpio_full_usage \
-       "Extract or list files from a cpio archive\n" \
+       "Extract or list files from a cpio archive" \
+        USE_FEATURE_CPIO_O( ", or create a cpio archive" ) \
+     "\n" \
        "Main operation mode:" \
      "\n        d       Make leading directories" \
      "\n        i       Extract" \
      "\n        m       Preserve mtime" \
+        USE_FEATURE_CPIO_O( \
+     "\n        o       Create" \
+     "\n        H newc  Define format" \
+        ) \
      "\n        t       List" \
      "\n        v       Verbose" \
      "\n        u       Unconditional overwrite" \