Enable seamless compression for WIN32

In the archival code we pretend that WIN32 is a no-MMU platform and
use the new mingw_popen_fd routine to pipe data to/from commands
to compress/decompress.

The pretence is maintained by redefining MMU macros in bb_archive.h.
This is mostly used in the archival code but there are a handful
of places where it's used to access public interfaces.  The symbol
BB_ARCHIVE_PUBLIC is defined in these places.

With these changes:

   tar supports seamless compression/decompression
   rpm2cpio and dpkg-deb can be enabled

1 files changed, 1 insertions, 0 deletions

diff --git a/libbb/appletlib.c b/libbb/appletlib.c
index 683d10b20..841494a70 100644
--- a/libbb/appletlib.c
+++ b/libbb/appletlib.c
@@ -62,6 +62,7 @@ static const char usage_messages[] ALIGN1 = UNPACKED_USAGE;
 #if ENABLE_FEATURE_COMPRESS_USAGE
 
 static const char packed_usage[] ALIGN1 = { PACKED_USAGE };
+#define BB_ARCHIVE_PUBLIC
 # include "bb_archive.h"
 static const char *unpack_usage_messages(void)
 {