bzip2: port bzip2 1.0.4 to busybox. note: bzip2 code resides

in separate directory (archival/bz/*)
and is covered by BSD-style license.
code size: 13k

include/applets.h

@@ -88,6 +88,7 @@ USE_BBCONFIG(APPLET(bbconfig, _BB_DIR_BIN, _BB_SUID_NEVER))
 //USE_BBSH(APPLET(bbsh, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_BUNZIP2(APPLET(bunzip2, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, _BB_DIR_USR_BIN, _BB_SUID_NEVER, bzcat))
+USE_BZIP2(APPLET(bzip2, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_CAL(APPLET(cal, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_CAT(APPLET_NOFORK(cat, cat, _BB_DIR_BIN, _BB_SUID_NEVER, cat))
 USE_CATV(APPLET(catv, _BB_DIR_BIN, _BB_SUID_NEVER))

include/libbb.h

@@ -709,6 +709,9 @@ int chown_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 #if ENABLE_GUNZIP
 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 #endif
+#if ENABLE_BUNZIP2
+int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+#endif
 int bbunpack(char **argv,
 	char* (*make_new_name)(char *filename),
 	USE_DESKTOP(long long) int (*unpacker)(void)

include/platform.h

@@ -54,7 +54,8 @@
 # define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m)))
 # if __GNUC_PREREQ (3,0)
 #  define ALWAYS_INLINE __attribute__ ((always_inline)) inline
-#  define NOINLINE      __attribute__((noinline))
+/* I've seen a toolchain where I needed __noinline__ instead of noinline */
+#  define NOINLINE      __attribute__((__noinline__))
 #  if !ENABLE_WERROR
 #   define ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
 #   define ATTRIBUTE_UNUSED_RESULT __attribute__ ((warn_unused_result))
@@ -63,7 +64,8 @@
 #   define ATTRIBUTE_UNUSED_RESULT /* n/a */
 #  endif
 # else
-#  define ALWAYS_INLINE inline
+#  define ALWAYS_INLINE inline /* n/a */
+#  define NOINLINE /* n/a */
 #  define ATTRIBUTE_DEPRECATED /* n/a */
 #  define ATTRIBUTE_UNUSED_RESULT /* n/a */
 # endif

include/usage.h

@@ -127,6 +127,16 @@
        "	-c	Write output to standard output\n" \
        "	-f	Force"
 
+#define bzip2_trivial_usage \
+       "[OPTION]... [FILE]..."
+#define bzip2_full_usage \
+       "Compress FILE(s) with bzip2 algorithm.\n" \
+       "When FILE is '-' or unspecified, reads standard input. Implies -c." \
+       "\n\nOptions:\n" \
+       "	-c	Write output to standard output instead of FILE.bz\n" \
+       "	-d	Decompress\n" \
+       "	-f	Force"
+
 #define busybox_notes_usage \
        "Hello world!\n"
 
@@ -1201,7 +1211,7 @@
        "Uncompress FILE (or standard input if FILE is '-')" \
        "\n\nOptions:\n" \
        "	-c	Write output to standard output\n" \
-       "	-f	Force read when source is a terminal\n" \
+       "	-f	Force\n" \
        "	-t	Test compressed file integrity"
 #define gunzip_example_usage \
        "$ ls -la /tmp/BusyBox*\n" \
@@ -1218,7 +1228,7 @@
        "\n\nOptions:\n" \
        "	-c	Write output to standard output instead of FILE.gz\n" \
        "	-d	Decompress\n" \
-       "	-f	Force write when destination is a terminal"
+       "	-f	Force"
 #define gzip_example_usage \
        "$ ls -la /tmp/busybox*\n" \
        "-rw-rw-r--    1 andersen andersen  1761280 Apr 14 17:47 /tmp/busybox.tar\n" \