fix most sign and variable initialization warnings

Change-Id: I56e08db791152a9c95fc0d16bc75b702e403274d

56 files changed, 161 insertions, 152 deletions

diff --git a/Android.mk b/Android.mk
index bf7bd02..fcefe56 100644
--- a/Android.mk
+++ b/Android.mk
@@ -9,6 +9,7 @@ BIONIC_ICS := true
 include $(CLEAR_VARS)
 LOCAL_SRC_FILES := android/regex/regex.c
 LOCAL_C_INCLUDES := $(BB_PATH)/android/regex
+LOCAL_CFLAGS := -Wno-sign-compare
 LOCAL_MODULE := libclearsilverregex
 include $(BUILD_STATIC_LIBRARY)
 
diff --git a/android/regex/cs_config.h b/android/regex/cs_config.h
index ad9e92e..7d14e2c 100644
--- a/android/regex/cs_config.h
+++ b/android/regex/cs_config.h
@@ -50,6 +50,7 @@
 #define HAVE_REGEX 1
 
 /* Does your system have pthreads? */
+#undef HAVE_PTHREADS
 #define HAVE_PTHREADS 1
 
 /* Does your system have lockf ? */
diff --git a/android/regex/regex.c b/android/regex/regex.c
index 3d4a9bc..b348d6c 100644
--- a/android/regex/regex.c
+++ b/android/regex/regex.c
@@ -455,10 +455,10 @@ typedef enum
   wordend,	/* Succeeds if at word end.  */
 
   wordbound,	/* Succeeds if at a word boundary.  */
-  notwordbound	/* Succeeds if not at a word boundary.	*/
+  notwordbound,	/* Succeeds if not at a word boundary.	*/
 
 #ifdef emacs
-  ,before_dot,	/* Succeeds if before point.  */
+  before_dot,	/* Succeeds if before point.  */
   at_dot,	/* Succeeds if at point.  */
   after_dot,	/* Succeeds if after point.  */
 
@@ -467,7 +467,7 @@ typedef enum
   syntaxspec,
 
 	/* Matches any character whose syntax is not that specified.  */
-  notsyntaxspec
+  notsyntaxspec,
 #endif /* emacs */
 } re_opcode_t;
 
@@ -1157,7 +1157,7 @@ typedef struct
     DEBUG_PRINT2 ("	available: %d\n", REMAINING_AVAIL_SLOTS);	\
 									\
     /* Ensure we have enough space allocated for what we will push.  */	\
-    while (REMAINING_AVAIL_SLOTS < NUM_FAILURE_ITEMS)			\
+    while ((int) REMAINING_AVAIL_SLOTS < (int) NUM_FAILURE_ITEMS)	\
       {									\
 	if (!DOUBLE_FAIL_STACK (fail_stack))				\
 	  return failure_code;						\
@@ -1171,7 +1171,8 @@ typedef struct
     DEBUG_PRINT1 ("\n");						\
 									\
     if (1)								\
-      for (this_reg = lowest_active_reg; this_reg <= highest_active_reg; \
+      for (this_reg = lowest_active_reg;				\
+	   this_reg <= (int) highest_active_reg; 			\
 	   this_reg++)							\
 	{								\
 	  DEBUG_PRINT2 ("  Pushing reg: %d\n", this_reg);		\
@@ -1195,23 +1196,23 @@ typedef struct
 	  PUSH_FAILURE_ELT (reg_info[this_reg].word);			\
 	}								\
 									\
-    DEBUG_PRINT2 ("  Pushing  low active reg: %d\n", lowest_active_reg);\
+    DEBUG_PRINT2("  Pushing  low active reg: %d\n", lowest_active_reg); \
     PUSH_FAILURE_INT (lowest_active_reg);				\
 									\
-    DEBUG_PRINT2 ("  Pushing high active reg: %d\n", highest_active_reg);\
+    DEBUG_PRINT2("  Pushing high active reg: %d\n", highest_active_reg);\
     PUSH_FAILURE_INT (highest_active_reg);				\
 									\
-    DEBUG_PRINT2 ("  Pushing pattern 0x%x: ", pattern_place);		\
+    DEBUG_PRINT2("  Pushing pattern 0x%x: ", pattern_place);		\
     DEBUG_PRINT_COMPILED_PATTERN (bufp, pattern_place, pend);		\
     PUSH_FAILURE_POINTER (pattern_place);				\
 									\
-    DEBUG_PRINT2 ("  Pushing string 0x%x: `", string_place);		\
+    DEBUG_PRINT2("  Pushing string 0x%x: `", string_place);		\
     DEBUG_PRINT_DOUBLE_STRING (string_place, string1, size1, string2,	\
 				 size2);				\
-    DEBUG_PRINT1 ("'\n");						\
+    DEBUG_PRINT1("'\n");						\
     PUSH_FAILURE_POINTER (string_place);				\
 									\
-    DEBUG_PRINT2 ("  Pushing failure id: %u\n", failure_id);		\
+    DEBUG_PRINT2("  Pushing failure id: %u\n", failure_id);		\
     DEBUG_PUSH (failure_id);						\
   } while (0)
 
@@ -1268,7 +1269,7 @@ typedef struct
   DEBUG_PRINT2 ("  Before pop, next avail: %d\n", fail_stack.avail);	\
   DEBUG_PRINT2 ("		     size: %d\n", fail_stack.size);	\
 									\
-  assert (fail_stack.avail >= NUM_NONREG_ITEMS);			\
+  assert ((int) fail_stack.avail >= (int) NUM_NONREG_ITEMS);		\
 									\
   DEBUG_POP (&failure_id);						\
   DEBUG_PRINT2 ("  Popping failure id: %u\n", failure_id);		\
@@ -1296,7 +1297,7 @@ typedef struct
   DEBUG_PRINT2 ("  Popping  low active reg: %d\n", low_reg);		\
 									\
   if (1)								\
-    for (this_reg = high_reg; this_reg >= low_reg; this_reg--)		\
+    for (this_reg = high_reg; this_reg >= (int) low_reg; this_reg--)	\
       {									\
 	DEBUG_PRINT2 ("	   Popping reg: %d\n", this_reg);		\
 									\
@@ -1311,7 +1312,8 @@ typedef struct
       }									\
   else									\
     {									\
-      for (this_reg = highest_active_reg; this_reg > high_reg; this_reg--) \
+      for (this_reg = highest_active_reg; this_reg > (int) high_reg;	\
+           this_reg--)							\
 	{								\
 	  reg_info[this_reg].word.integer = 0;				\
 	  regend[this_reg] = 0;						\
@@ -1431,14 +1433,14 @@ static reg_errcode_t compile_range ();
 
 /* Make sure we have at least N more bytes of space in buffer.	*/
 #define GET_BUFFER_SPACE(n)						\
-    while (b - bufp->buffer + (n) > bufp->allocated)			\
+    while (b - bufp->buffer + (n) > (int) bufp->allocated)		\
       EXTEND_BUFFER ()
 
 /* Make sure we have one more byte of buffer space and then add C to it.  */
 #define BUF_PUSH(c)							\
   do {									\
     GET_BUFFER_SPACE (1);						\
-    *b++ = (unsigned char) (c);						\
+    *b++ = (unsigned char) (c);					        \
   } while (0)
 
 
@@ -3490,7 +3492,7 @@ static boolean alt_match_null_string_p (),
 
 /* Free everything we malloc.  */
 #ifdef MATCH_MAY_ALLOCATE
-#define FREE_VAR(var) if (var) { REGEX_FREE (var); var = NULL; } else
+#define FREE_VAR(var) if (var) { REGEX_FREE (var); var = NULL; } else {}
 #define FREE_VARIABLES()						\
   do {									\
     REGEX_FREE_STACK (fail_stack.stack);				\
@@ -3746,7 +3748,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
   /* Initialize subexpression text positions to -1 to mark ones that no
      start_memory/stop_memory has been seen for. Also initialize the
      register information struct.  */
-  for (mcnt = 1; mcnt < num_regs; mcnt++)
+  for (mcnt = 1; mcnt < (int) num_regs; mcnt++)
     {
       regstart[mcnt] = regend[mcnt]
 	= old_regstart[mcnt] = old_regend[mcnt] = REG_UNSET_VALUE;
@@ -3846,7 +3848,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 
 		      DEBUG_PRINT1 ("\nSAVING match as best so far.\n");
 
-		      for (mcnt = 1; mcnt < num_regs; mcnt++)
+		      for (mcnt = 1; mcnt < (int) num_regs; mcnt++)
 			{
 			  best_regstart[mcnt] = regstart[mcnt];
 			  best_regend[mcnt] = regend[mcnt];
@@ -3872,7 +3874,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 		  dend = ((d >= string1 && d <= end1)
 			   ? end_match_1 : end_match_2);
 
-		  for (mcnt = 1; mcnt < num_regs; mcnt++)
+		  for (mcnt = 1; mcnt < (int) num_regs; mcnt++)
 		    {
 		      regstart[mcnt] = best_regstart[mcnt];
 		      regend[mcnt] = best_regend[mcnt];
@@ -3937,7 +3939,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 
 	      /* Go through the first `min (num_regs, regs->num_regs)'
 		 registers, since that is all we initialized.  */
-	      for (mcnt = 1; mcnt < MIN (num_regs, regs->num_regs); mcnt++)
+	      for (mcnt = 1; mcnt < (int) MIN (num_regs, regs->num_regs); mcnt++)
 		{
 		  if (REG_UNSET (regstart[mcnt]) || REG_UNSET (regend[mcnt]))
 		    regs->start[mcnt] = regs->end[mcnt] = -1;
@@ -3955,7 +3957,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 		 we (re)allocated the registers, this is the case,
 		 because we always allocate enough to have at least one
 		 -1 at the end.	 */
-	      for (mcnt = num_regs; mcnt < regs->num_regs; mcnt++)
+	      for (mcnt = num_regs; mcnt < (int) regs->num_regs; mcnt++)
 		regs->start[mcnt] = regs->end[mcnt] = -1;
 	    } /* regs && !bufp->no_sub */
 
diff --git a/applets/usage_pod.c b/applets/usage_pod.c
index 0b1c4aa..a67e8b4 100644
--- a/applets/usage_pod.c
+++ b/applets/usage_pod.c
@@ -71,7 +71,7 @@ int main(void)
 		} else {
 			printf(", ");
 		}
-		printf(usage_array[i].aname);
+		printf("%s", usage_array[i].aname);
 		col += len2;
 	}
 	printf("\n\n");
diff --git a/archival/libarchive/bz/blocksort.c b/archival/libarchive/bz/blocksort.c
index e600cb7..d329f44 100644
--- a/archival/libarchive/bz/blocksort.c
+++ b/archival/libarchive/bz/blocksort.c
@@ -828,7 +828,7 @@ void mainSort(EState* state,
 		int32_t vv;
 		/* bbox: was: int32_t h = 1; */
 		/* do h = 3 * h + 1; while (h <= 256); */
-		uint32_t h = 364;
+		int32_t h = 364;
 
 		do {
 			/*h = h / 3;*/
diff --git a/archival/libarchive/data_extract_all.c b/archival/libarchive/data_extract_all.c
index 3f67b83..aaab437 100644
--- a/archival/libarchive/data_extract_all.c
+++ b/archival/libarchive/data_extract_all.c
@@ -68,7 +68,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 				bb_perror_msg_and_die("can't stat old file");
 			}
 		}
-		else if (existing_sb.st_mtime >= file_header->mtime) {
+		else if ((time_t) existing_sb.st_mtime >= (time_t) file_header->mtime) {
 			if (!(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)
 			 && !S_ISDIR(file_header->mode)
 			) {
diff --git a/archival/libarchive/decompress_bunzip2.c b/archival/libarchive/decompress_bunzip2.c
index dc252bb..53bf47a 100644
--- a/archival/libarchive/decompress_bunzip2.c
+++ b/archival/libarchive/decompress_bunzip2.c
@@ -153,7 +153,7 @@ static int get_next_block(bunzip_data *bd)
 	struct group_data *hufGroup;
 	int dbufCount, dbufSize, groupCount, *base, *limit, selector,
 		i, j, t, runPos, symCount, symTotal, nSelectors, byteCount[256];
-	int runCnt = runCnt; /* for compiler */
+	int runCnt = 0;
 	uint8_t uc, symToByte[256], mtfSymbol[256], *selectors;
 	uint32_t *dbuf;
 	unsigned origPtr;
@@ -780,7 +780,7 @@ unpack_bz2_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
 		len = bd->inbufCount - bd->inbufPos;
 		memcpy(outbuf, &bd->inbuf[bd->inbufPos], len);
 		if (len < 2) {
-			if (safe_read(src_fd, outbuf + len, 2 - len) != 2 - len)
+			if (safe_read(src_fd, outbuf + len, 2 - len) != (int)(2 - len))
 				break;
 			len = 2;
 		}
diff --git a/archival/libarchive/decompress_gunzip.c b/archival/libarchive/decompress_gunzip.c
index 2d5ab3e..94204de 100644
--- a/archival/libarchive/decompress_gunzip.c
+++ b/archival/libarchive/decompress_gunzip.c
@@ -256,7 +256,7 @@ static unsigned fill_bitbuffer(STATE_PARAM unsigned bitbuffer, unsigned *current
 	while (*current < required) {
 		if (bytebuffer_offset >= bytebuffer_size) {
 			unsigned sz = bytebuffer_max - 4;
-			if (to_read >= 0 && to_read < sz) /* unzip only */
+			if (to_read >= 0 && (unsigned) to_read < sz) /* unzip only */
 				sz = to_read;
 			/* Leave the first 4 bytes empty so we can always unwind the bitbuffer
 			 * to the front of the bytebuffer */
@@ -409,7 +409,7 @@ static int huft_build(const unsigned *b, const unsigned n,
 						f -= *xp; /* else deduct codes from patterns */
 					}
 				}
-				j = (w + j > eob_len && w < eob_len) ? eob_len - w : j;	/* make EOB code end at table */
+				j = ((unsigned) (w + j) > eob_len && w > 0 && (unsigned) w < eob_len) ? eob_len - w : j;	/* make EOB code end at table */
 				z = 1 << j;	/* table entries for j-bit table */
 				ws[htl+1] = w + j;	/* set bits decoded in stack */
 
diff --git a/archival/unzip.c b/archival/unzip.c
index 3c76cda..a4fa890 100644
--- a/archival/unzip.c
+++ b/archival/unzip.c
@@ -259,7 +259,7 @@ static void unzip_extract(zip_header_t *zip_header, int dst_fd)
 			bb_error_msg_and_die("crc error");
 		}
 		/* Validate decompression - size */
-		if (zip_header->formatted.ucmpsize != aux.bytes_out) {
+		if (zip_header->formatted.ucmpsize != (uint32_t) aux.bytes_out) {
 			/* Don't die. Who knows, maybe len calculation
 			 * was botched somewhere. After all, crc matched! */
 			bb_error_msg("bad length");
diff --git a/coreutils/cal.c b/coreutils/cal.c
index b470ad9..bd1ab2a 100644
--- a/coreutils/cal.c
+++ b/coreutils/cal.c
@@ -325,7 +325,7 @@ static char *build_row(char *p, unsigned *dp)
 	col = 0;
 	do {
 		day = *dp++;
-		if (day != SPACE) {
+		if (day != (unsigned) SPACE) {
 			if (julian) {
 				++p;
 				if (day >= 100) {
diff --git a/coreutils/expr.c b/coreutils/expr.c
index c986f93..86c5709 100644
--- a/coreutils/expr.c
+++ b/coreutils/expr.c
@@ -323,8 +323,8 @@ static VALUE *eval6(void)
 		"quote\0""length\0""match\0""index\0""substr\0";
 
 	VALUE *r, *i1, *i2;
-	VALUE *l = l; /* silence gcc */
-	VALUE *v = v; /* silence gcc */
+	VALUE *l = NULL;
+	VALUE *v = NULL;
 	int key = *G.args ? index_in_strings(keywords, *G.args) + 1 : 0;
 
 	if (key == 0) /* not a keyword */
diff --git a/coreutils/ls.c b/coreutils/ls.c
index b1ba08b..e4717e0 100644
--- a/coreutils/ls.c
+++ b/coreutils/ls.c
@@ -677,7 +677,7 @@ static void display_files(struct dnode **dn, unsigned nfiles)
 		/* find the longest file name, use that as the column width */
 		for (i = 0; dn[i]; i++) {
 			int len = calc_name_len(dn[i]->name);
-			if (column_width < len)
+			if ((int)column_width < len)
 				column_width = len;
 		}
 		column_width += 1 +
diff --git a/coreutils/seq.c b/coreutils/seq.c
index 8986192..10dabe9 100644
--- a/coreutils/seq.c
+++ b/coreutils/seq.c
@@ -28,7 +28,7 @@ int seq_main(int argc, char **argv)
 	};
 	double first, last, increment, v;
 	unsigned n;
-	unsigned width;
+	int width;
 	unsigned frac_part;
 	const char *sep, *opt_s = "\n";
 	unsigned opt;
@@ -70,7 +70,7 @@ int seq_main(int argc, char **argv)
 	while (1) {
 		char *dot = strchrnul(*argv, '.');
 		int w = (dot - *argv);
-		int f = strlen(dot);
+		unsigned f = strlen(dot);
 		if (width < w)
 			width = w;
 		argv++;
diff --git a/coreutils/tail.c b/coreutils/tail.c
index b376ec8..96fd011 100644
--- a/coreutils/tail.c
+++ b/coreutils/tail.c
@@ -114,8 +114,8 @@ int tail_main(int argc, char **argv)
 
 	char *tailbuf;
 	size_t tailbufsize;
-	unsigned header_threshhold = 1;
-	unsigned nfiles;
+	int header_threshhold = 1;
+	int nfiles;
 	int i, opt;
 
 	int *fds;
diff --git a/editors/awk.c b/editors/awk.c
index 71abca2..51fd392 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -2410,15 +2410,15 @@ static var *evaluate(node *op, var *res)
 	v1 = nvalloc(2);
 
 	while (op) {
-		struct {
+		static struct {
 			var *v;
 			const char *s;
-		} L = L; /* for compiler */
-		struct {
+		} L;
+		static struct {
 			var *v;
 			const char *s;
-		} R = R;
-		double L_d = L_d;
+		} R;
+		static double L_d;
 		uint32_t opinfo;
 		int opn;
 		node *op1;
@@ -2645,7 +2645,7 @@ static var *evaluate(node *op, var *res)
 				copyvar(v, arg);
 				v->type |= VF_CHILD;
 				v->x.parent = arg;
-				if (++v - vbeg >= op->r.f->nargs)
+				if (++v - vbeg >= (int) op->r.f->nargs)
 					break;
 			}
 
@@ -2703,7 +2703,7 @@ static var *evaluate(node *op, var *res)
 
 		/* simple builtins */
 		case XC( OC_FBLTIN ): {
-			double R_d = R_d; /* for compiler */
+			static double R_d;
 
 			switch (opn) {
 			case F_in:
@@ -2914,7 +2914,7 @@ static var *evaluate(node *op, var *res)
 		}
 
 		case XC( OC_COMPARE ): {
-			int i = i; /* for compiler */
+			static int i;
 			double Ld;
 
 			if (is_numeric(L.v) && is_numeric(R.v)) {
diff --git a/editors/diff.c b/editors/diff.c
index 2a89806..70c6f67 100644
--- a/editors/diff.c
+++ b/editors/diff.c
@@ -448,7 +448,7 @@ static NOINLINE int *create_J(FILE_and_pos_t ft[2], int nlen[2], off_t *ix[2])
 	for (i = 0; i < 2; i++) {
 		unsigned hash;
 		token_t tok;
-		size_t sz = 100;
+		int sz = 100;
 		nfile[i] = xmalloc((sz + 3) * sizeof(nfile[i][0]));
 		/* ft gets here without the correct position, cant use seek_ft */
 		ft[i].ft_pos = 0;
diff --git a/editors/vi.c b/editors/vi.c
index b4ad12e..5245aca 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -280,7 +280,7 @@ struct globals {
 	int last_file_modified;  // = -1;
 	int save_argc;           // how many file names on cmd line
 	int cmdcnt;              // repetition count
-	unsigned rows, columns;	 // the terminal screen is this size
+	int rows, columns;       // the terminal screen is this size
 #if ENABLE_FEATURE_VI_ASK_TERMINAL
 	int get_rowcol_error;
 #endif
@@ -648,7 +648,9 @@ static int init_text_buffer(char *fn)
 #if ENABLE_FEATURE_VI_WIN_RESIZE
 static int query_screen_dimensions(void)
 {
-	int err = get_terminal_width_height(STDIN_FILENO, &columns, &rows);
+	unsigned c, r;
+	int err = get_terminal_width_height(STDIN_FILENO, &c, &r);
+	columns = c; rows = r;
 	if (rows > MAX_SCR_ROWS)
 		rows = MAX_SCR_ROWS;
 	if (columns > MAX_SCR_COLS)
@@ -2084,7 +2086,7 @@ static uintptr_t text_hole_make(char *p, int size)	// at "p", make a 'size' byte
 		p           += bias;
 #if ENABLE_FEATURE_VI_YANKMARK
 		{
-			int i;
+			unsigned i;
 			for (i = 0; i < ARRAY_SIZE(mark); i++)
 				if (mark[i])
 					mark[i] += bias;
diff --git a/findutils/find.c b/findutils/find.c
index 70b193c..ce0b0ed 100644
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -376,7 +376,7 @@ IF_FEATURE_FIND_PRUNE(  ACTS(prune))
 IF_FEATURE_FIND_DELETE( ACTS(delete))
 IF_FEATURE_FIND_EXEC(   ACTS(exec,  char **exec_argv; unsigned *subst_count; int exec_argc;))
 IF_FEATURE_FIND_GROUP(  ACTS(group, gid_t gid;))
-IF_FEATURE_FIND_LINKS(  ACTS(links, char links_char; int links_count;))
+IF_FEATURE_FIND_LINKS(  ACTS(links, char links_char; unsigned links_count;))
 
 struct globals {
 	IF_FEATURE_FIND_XDEV(dev_t *xdev_dev;)
@@ -550,7 +550,7 @@ ACTF(regex)
 #if ENABLE_FEATURE_FIND_TYPE
 ACTF(type)
 {
-	return ((statbuf->st_mode & S_IFMT) == ap->type_mask);
+	return ((statbuf->st_mode & S_IFMT) == (unsigned) ap->type_mask);
 }
 #endif
 #if ENABLE_FEATURE_FIND_PERM
@@ -595,7 +595,7 @@ ACTF(mmin)
 #if ENABLE_FEATURE_FIND_NEWER
 ACTF(newer)
 {
-	return (ap->newer_mtime < statbuf->st_mtime);
+	return ((time_t) ap->newer_mtime < (time_t) statbuf->st_mtime);
 }
 #endif
 #if ENABLE_FEATURE_FIND_INUM
diff --git a/findutils/grep.c b/findutils/grep.c
index f14d6e6..78be704 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -337,7 +337,7 @@ static int grep_file(FILE *file)
 #endif
 	) {
 		llist_t *pattern_ptr = pattern_head;
-		grep_list_data_t *gl = gl; /* for gcc */
+		static grep_list_data_t *gl;
 
 		linenum++;
 		found = 0;
@@ -650,7 +650,7 @@ int grep_main(int argc UNUSED_PARAM, char **argv)
 		lines_before = 0;
 		lines_after = 0;
 	} else if (lines_before > 0) {
-		if (lines_before > INT_MAX / sizeof(long long))
+		if ((unsigned) lines_before > (unsigned) (INT_MAX / sizeof(long long)))
 			lines_before = INT_MAX / sizeof(long long);
 		/* overflow in (lines_before * sizeof(x)) is prevented (above) */
 		before_buf = xzalloc(lines_before * sizeof(before_buf[0]));
diff --git a/include-full/autoconf.h b/include-full/autoconf.h
index 27a07da..ff5919a 100644
--- a/include-full/autoconf.h
+++ b/include-full/autoconf.h
@@ -1,8 +1,8 @@
 /*
  * Automatically generated C config: don't edit
- * Busybox version: 1.20.0-ics
+ * Busybox version: 1.20.0-cm9
  */
-#define AUTOCONF_TIMESTAMP "2012-04-23 18:24 +0200"
+#define AUTOCONF_TIMESTAMP "2012-05-06 01:47 +0200"
 
 #define CONFIG_HAVE_DOT_CONFIG 1
 #define ENABLE_HAVE_DOT_CONFIG 1
diff --git a/include-minimal/autoconf.h b/include-minimal/autoconf.h
index 5cec24d..473c9e7 100644
--- a/include-minimal/autoconf.h
+++ b/include-minimal/autoconf.h
@@ -1,8 +1,8 @@
 /*
  * Automatically generated C config: don't edit
- * Busybox version: 1.20.0-ics
+ * Busybox version: 1.20.0-cm9
  */
-#define AUTOCONF_TIMESTAMP "2012-04-23 18:03 +0200"
+#define AUTOCONF_TIMESTAMP "2012-05-06 01:46 +0200"
 
 #define CONFIG_HAVE_DOT_CONFIG 1
 #define ENABLE_HAVE_DOT_CONFIG 1
diff --git a/include/android.h b/include/android.h
index 024221e..8599416 100644
--- a/include/android.h
+++ b/include/android.h
@@ -34,9 +34,10 @@ int    stime(time_t *) 25
 int    swapon(const char *, int)       87
 int    swapoff(const char *)   115
 */
-int              stime (time_t *);
-int              swapon (const char *, int);
-int              swapoff (const char *);
+int    stime(time_t *);
+int    swapon(const char *, int);
+int    swapoff(const char *);
+int    getsid(pid_t);
 
 /* local definition in libbb/xfuncs_printf.c */
 int fdprintf(int fd, const char *format, ...);
diff --git a/include/libbb.h b/include/libbb.h
index 8b09f5a..a38ecf2 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1465,9 +1465,9 @@ typedef struct line_input_t {
 	int flags;
 	const char *path_lookup;
 # if MAX_HISTORY
-	int cnt_history;
-	int cur_history;
-	int max_history; /* must never be <= 0 */
+	unsigned cnt_history;
+	unsigned cur_history;
+	unsigned max_history; /* must never be <= 0 */
 #  if ENABLE_FEATURE_EDITING_SAVEHISTORY
 	/* meaning of this field depends on FEATURE_EDITING_SAVE_ON_EXIT:
 	 * if !FEATURE_EDITING_SAVE_ON_EXIT: "how many lines are
diff --git a/libbb/fgets_str.c b/libbb/fgets_str.c
index 89210a3..de99e5d 100644
--- a/libbb/fgets_str.c
+++ b/libbb/fgets_str.c
@@ -15,8 +15,8 @@ static char *xmalloc_fgets_internal(FILE *file, const char *terminating_string,
 	char *linebuf = NULL;
 	const int term_length = strlen(terminating_string);
 	int end_string_offset;
-	int linebufsz = 0;
-	int idx = 0;
+	size_t linebufsz = 0;
+	size_t idx = 0;
 	int ch;
 	size_t maxsz = *maxsz_p;
 
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index db84167..1a43b17 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -125,7 +125,7 @@ struct lineedit_statics {
 	unsigned cmdedit_y;        /* pseudoreal y (row) terminal position */
 	unsigned cmdedit_prmt_len; /* length of prompt (without colors etc) */
 
-	unsigned cursor;
+	int cursor;
 	int command_len; /* must be signed */
 	/* signed maxsize: we want x in "if (x > S.maxsize)"
 	 * to _not_ be promoted to unsigned */
@@ -217,7 +217,7 @@ static size_t load_string(const char *src)
 		return len;
 	} else {
 		unsigned i = 0;
-		while (src[i] && i < S.maxsize - 1) {
+		while (src[i] && i < (unsigned) S.maxsize - 1) {
 			command_ps[i] = src[i];
 			i++;
 		}
@@ -441,7 +441,7 @@ static void put_prompt(void)
 /* (optimized for slow terminals) */
 static void input_backward(unsigned num)
 {
-	if (num > cursor)
+	if (num > (unsigned) cursor)
 		num = cursor;
 	if (num == 0)
 		return;
@@ -496,7 +496,7 @@ static void input_backward(unsigned num)
 		 * A simpler thing to do is to redraw everything from the start
 		 * up to new cursor position (which is already known):
 		 */
-		unsigned sv_cursor;
+		int sv_cursor;
 		/* go to 1st column; go up to first line */
 		printf("\r" ESC"[%uA", cmdedit_y);
 		cmdedit_y = 0;
@@ -1072,7 +1072,7 @@ static NOINLINE void input_tab(smallint *lastWasTab)
 	char *match_buf;
 	size_t len_found;
 	/* Length of string used for matching */
-	unsigned match_pfx_len = match_pfx_len;
+	unsigned match_pfx_len = 0;
 	int find_type;
 # if ENABLE_UNICODE_SUPPORT
 	/* cursor pos in command converted to multibyte form */
@@ -1409,7 +1409,8 @@ void save_history(line_input_t *st)
 
 	fp = fopen(st->hist_file, "a");
 	if (fp) {
-		int i, fd;
+		int fd;
+		unsigned i;
 		char *new_name;
 		line_input_t *st_temp;
 
@@ -1478,7 +1479,7 @@ static void save_history(char *str)
 		fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
 		if (fd >= 0) {
 			FILE *fp;
-			int i;
+			unsigned i;
 
 			fp = xfdopen_for_write(fd);
 			for (i = 0; i < st_temp->cnt_history; i++)
@@ -1499,7 +1500,7 @@ static void save_history(char *str)
 
 static void remember_in_history(char *str)
 {
-	int i;
+	unsigned i;
 
 	if (!(state->flags & DO_HISTORY))
 		return;
@@ -1885,7 +1886,7 @@ static void cmdedit_setwidth(unsigned w, int redraw_flg)
 	cmdedit_termw = w;
 	if (redraw_flg) {
 		/* new y for current cursor */
-		int new_y = (cursor + cmdedit_prmt_len) / w;
+		unsigned new_y = (cursor + cmdedit_prmt_len) / w;
 		/* redraw */
 		redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
 		fflush_all();
@@ -1936,7 +1937,7 @@ static int lineedit_read_key(char *read_key_buffer, int timeout)
 			S.sent_ESC_br6n = 0;
 			if (cursor == 0) { /* otherwise it may be bogus */
 				int col = ((ic >> 32) & 0x7fff) - 1;
-				if (col > cmdedit_prmt_len) {
+				if (col > (int) cmdedit_prmt_len) {
 					cmdedit_x += (col - cmdedit_prmt_len);
 					while (cmdedit_x >= cmdedit_termw) {
 						cmdedit_x -= cmdedit_termw;
diff --git a/libbb/parse_config.c b/libbb/parse_config.c
index 1590d9a..e3840dc 100644
--- a/libbb/parse_config.c
+++ b/libbb/parse_config.c
@@ -122,7 +122,7 @@ static int get_line_with_continuation(parser_t *parser)
 		if (nlen <= 0)
 			break;
 
-		if (parser->line_alloc < len + nlen + 1) {
+		if ((ssize_t)parser->line_alloc < len + nlen + 1) {
 			parser->line_alloc = len + nlen + 1;
 			line = parser->line = xrealloc(line, parser->line_alloc);
 		}
diff --git a/libbb/time.c b/libbb/time.c
index e2b9384..3778a2d 100644
--- a/libbb/time.c
+++ b/libbb/time.c
@@ -140,15 +140,15 @@ void FAST_FUNC parse_datestr(const char *date_str, struct tm *ptm)
 					&end) >= 5) {
 			/* Adjust month from 1-12 to 0-11 */
 			ptm->tm_mon -= 1;
-			if ((int)cur_year >= 50) { /* >= 1950 */
+			if (cur_year >= 50) { /* >= 1950 */
 				/* Adjust year: */
 				/* 1. Put it in the current century */
 				ptm->tm_year += (cur_year / 100) * 100;
 				/* 2. If too far in the past, +100 years */
-				if (ptm->tm_year < cur_year - 50)
+				if (ptm->tm_year < (int) cur_year - 50)
 					ptm->tm_year += 100;
 				/* 3. If too far in the future, -100 years */
-				if (ptm->tm_year > cur_year + 50)
+				if (ptm->tm_year > (int) cur_year + 50)
 					ptm->tm_year -= 100;
 			}
 		} else
diff --git a/miscutils/crond.c b/miscutils/crond.c
index a0b73c7..4036986 100644
--- a/miscutils/crond.c
+++ b/miscutils/crond.c
@@ -922,7 +922,7 @@ int crond_main(int argc UNUSED_PARAM, char **argv)
 		 */
 		if (stat(G.crontab_dir_name, &sbuf) != 0)
 			sbuf.st_mtime = 0; /* force update (once) if dir was deleted */
-		if (G.crontab_dir_mtime != sbuf.st_mtime) {
+		if ((time_t) G.crontab_dir_mtime != (time_t) sbuf.st_mtime) {
 			G.crontab_dir_mtime = sbuf.st_mtime;
 			rescan = 1;
 		}
diff --git a/miscutils/devmem.c b/miscutils/devmem.c
index 786a21b..ecd8738 100644
--- a/miscutils/devmem.c
+++ b/miscutils/devmem.c
@@ -19,7 +19,7 @@ int devmem_main(int argc UNUSED_PARAM, char **argv)
 {
 	void *map_base, *virt_addr;
 	uint64_t read_result;
-	uint64_t writeval = writeval; /* for compiler */
+	uint64_t writeval = 0;
 	off_t target;
 	unsigned page_size, mapped_size, offset_in_page;
 	int fd;
diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c
index a2d3563..a657df5 100644
--- a/miscutils/fbsplash.c
+++ b/miscutils/fbsplash.c
@@ -296,7 +296,7 @@ static void fb_drawprogressbar(unsigned percent)
 	pos_x = left_x;
 	if (percent > 0) {
 		int y;
-		unsigned i;
+		int i;
 
 		// actual progress bar
 		pos_x += (unsigned)(width * percent) / 100;
@@ -444,7 +444,7 @@ int fbsplash_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int fbsplash_main(int argc UNUSED_PARAM, char **argv)
 {
 	const char *fb_device, *cfg_filename, *fifo_filename;
-	FILE *fp = fp; // for compiler
+	FILE *fp = NULL;
 	char *num_buf;
 	unsigned num;
 	bool bCursorOff;
diff --git a/miscutils/flash_lock_unlock.c b/miscutils/flash_lock_unlock.c
index 1fefd95..f0d9595 100644
--- a/miscutils/flash_lock_unlock.c
+++ b/miscutils/flash_lock_unlock.c
@@ -62,7 +62,7 @@ int flash_lock_unlock_main(int argc UNUSED_PARAM, char **argv)
 			sectors = info.size / info.erasesize;
 		} else {
 // isn't this useless?
-			unsigned long num = info.size / info.erasesize;
+			long num = info.size / info.erasesize;
 			if (sectors > num) {
 				bb_error_msg_and_die("%ld are too many "
 						"sectors, device only has "
diff --git a/miscutils/flashcp.c b/miscutils/flashcp.c
index 790f9c0..9805395 100644
--- a/miscutils/flashcp.c
+++ b/miscutils/flashcp.c
@@ -48,7 +48,7 @@ int flashcp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int flashcp_main(int argc UNUSED_PARAM, char **argv)
 {
 	int fd_f, fd_d; /* input file and mtd device file descriptors */
-	int i;
+	unsigned i;
 	uoff_t erase_count;
 	unsigned opts;
 	struct mtd_info_user mtd;
@@ -134,7 +134,7 @@ int flashcp_main(int argc UNUSED_PARAM, char **argv)
 				int ret;
 				errno = 0;
 				ret = full_write(fd_d, buf, count);
-				if (ret != count) {
+				if (ret != (int) count) {
 					bb_perror_msg_and_die("write error at 0x%"OFF_FMT"x on %s, "
 						"write returned %d",
 						done, devicename, ret);
diff --git a/miscutils/less.c b/miscutils/less.c
index f0187bf..5f44eb4 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -335,7 +335,7 @@ static void re_wrap(void)
 				dst_idx++;
 				if (new_line_pos < w) {
 					/* if we came here thru "goto next_new" */
-					if (src_idx > max_fline)
+					if (src_idx > (int) max_fline)
 						break;
 					lineno = LINENO(s);
 				}
@@ -351,7 +351,7 @@ static void re_wrap(void)
 			new_cur_fline = dst_idx;
 		src_idx++;
 		/* no more lines? finish last new line (and exit the loop) */
-		if (src_idx > max_fline)
+		if (src_idx > (int) max_fline)
 			goto next_new;
 		s = old_flines[src_idx];
 		if (lineno != LINENO(s)) {
@@ -1412,7 +1412,7 @@ static void add_mark(void)
 static void goto_mark(void)
 {
 	int letter;
-	int i;
+	unsigned i;
 
 	print_statusline("Go to mark: ");
 	letter = less_getch(sizeof("Go to mark: ") - 1);
@@ -1420,11 +1420,11 @@ static void goto_mark(void)
 
 	if (isalpha(letter)) {
 		for (i = 0; i <= num_marks; i++)
-			if (letter == mark_lines[i][0]) {
+			if ((unsigned) letter == mark_lines[i][0]) {
 				buffer_line(mark_lines[i][1]);
 				break;
 			}
-		if (num_marks == 14 && letter != mark_lines[14][0])
+		if (num_marks == 14 && (unsigned) letter != mark_lines[14][0])
 			print_statusline("Mark not set");
 	} else
 		print_statusline("Invalid mark letter");
diff --git a/miscutils/nandwrite.c b/miscutils/nandwrite.c
index 2ba6e3f..5f8d033 100644
--- a/miscutils/nandwrite.c
+++ b/miscutils/nandwrite.c
@@ -199,7 +199,7 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
 			 */
 			break;
 		}
-		if (cnt < meminfo_writesize) {
+		if (cnt < (ssize_t) meminfo_writesize) {
 			if (IS_NANDDUMP)
 				bb_error_msg_and_die("short read");
 			if (!(opts & OPT_p))
@@ -218,7 +218,7 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
 		}
 
 		mtdoffset += meminfo_writesize;
-		if (cnt < meminfo_writesize)
+		if (cnt < (ssize_t) meminfo_writesize)
 			break;
 	}
 
diff --git a/miscutils/rx.c b/miscutils/rx.c
index af59732..304b56b 100644
--- a/miscutils/rx.c
+++ b/miscutils/rx.c
@@ -85,7 +85,7 @@ static int receive(/*int read_fd, */int file_fd)
 		int blockNo, blockNoOnesCompl;
 		int cksum_or_crc;
 		int expected;
-		int i, j;
+		unsigned i, j;
 
 		blockBegin = read_byte(timeout);
 		if (blockBegin < 0)
@@ -109,7 +109,7 @@ static int receive(/*int read_fd, */int file_fd)
 		}
 		/* Write previously received block */
 		errno = 0;
-		if (full_write(file_fd, blockBuf, blockLength) != blockLength) {
+		if ((unsigned) full_write(file_fd, blockBuf, blockLength) != blockLength) {
 			bb_perror_msg(bb_msg_write_error);
 			goto fatal;
 		}
@@ -139,7 +139,7 @@ static int receive(/*int read_fd, */int file_fd)
 		if (blockNoOnesCompl < 0)
 			goto timeout;
 
-		if (blockNo != (255 - blockNoOnesCompl)) {
+		if (blockNo != (int) (255 - blockNoOnesCompl)) {
 			bb_error_msg("bad block ones compl");
 			goto error;
 		}
@@ -162,14 +162,14 @@ static int receive(/*int read_fd, */int file_fd)
 				goto timeout;
 		}
 
-		if (blockNo == ((wantBlockNo - 1) & 0xff)) {
+		if (blockNo == (int) ((wantBlockNo - 1) & 0xff)) {
 			/* a repeat of the last block is ok, just ignore it. */
 			/* this also ignores the initial block 0 which is */
-			/* meta data. */
+			/* meta data. nt)*/
 			blockLength = 0;
 			goto next;
 		}
-		if (blockNo != (wantBlockNo & 0xff)) {
+		if (blockNo != (int) (wantBlockNo & 0xff)) {
 			bb_error_msg("unexpected block no, 0x%08x, expecting 0x%08x", blockNo, wantBlockNo);
 			goto error;
 		}
diff --git a/miscutils/strings.c b/miscutils/strings.c
index 9f50182..b040508 100644
--- a/miscutils/strings.c
+++ b/miscutils/strings.c
@@ -26,8 +26,8 @@
 int strings_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int strings_main(int argc UNUSED_PARAM, char **argv)
 {
-	int n, c, status = EXIT_SUCCESS;
-	unsigned count;
+	int c, status = EXIT_SUCCESS;
+	unsigned n, count;
 	off_t offset;
 	FILE *file;
 	char *string;
diff --git a/miscutils/taskset.c b/miscutils/taskset.c
index dcd4646..71ad825 100644
--- a/miscutils/taskset.c
+++ b/miscutils/taskset.c
@@ -90,7 +90,7 @@ int taskset_main(int argc UNUSED_PARAM, char **argv)
 	unsigned opt_p;
 	const char *current_new;
 	char *pid_str;
-	char *aff = aff; /* for compiler */
+	char *aff = NULL;
 
 	/* NB: we mimic util-linux's taskset: -p does not take
 	 * an argument, i.e., "-pN" is NOT valid, only "-p N"!
diff --git a/modutils/modinfo.c b/modutils/modinfo.c
index 9a021b3..008dfe6 100644
--- a/modutils/modinfo.c
+++ b/modutils/modinfo.c
@@ -88,7 +88,7 @@ static void modinfo(const char *path, const char *version,
 		free((char*)fullpath);
 		if (!the_module) {
 			// outputs system error msg
-			bb_perror_msg("");
+			bb_perror_msg("\n");
 			return;
 		}
 	}
diff --git a/networking/libiproute/ipaddress.c b/networking/libiproute/ipaddress.c
index b3748e8..03d8e12 100644
--- a/networking/libiproute/ipaddress.c
+++ b/networking/libiproute/ipaddress.c
@@ -239,7 +239,7 @@ static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
 	if (!rta_tb[IFA_ADDRESS])
 		rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
 
-	if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
+	if (G_filter.ifindex && G_filter.ifindex != (int) ifa->ifa_index)
 		return 0;
 	if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
 		return 0;
@@ -267,7 +267,7 @@ static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
 
 	if (G_filter.flushb) {
 		struct nlmsghdr *fn;
-		if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
+		if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > (unsigned) G_filter.flushe) {
 			if (flush_update())
 				return -1;
 		}
@@ -379,8 +379,8 @@ static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
 			continue;
 		if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
 			return -1;
-		if (ifa->ifa_index != ifindex
-		 || (G_filter.family && G_filter.family != ifa->ifa_family)
+		if ((int) ifa->ifa_index != ifindex
+		 || (G_filter.family && G_filter.family != (family_t) ifa->ifa_family)
 		) {
 			continue;
 		}
@@ -529,8 +529,8 @@ int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
 				struct nlmsghdr *n = &a->h;
 				struct ifaddrmsg *ifa = NLMSG_DATA(n);
 
-				if (ifa->ifa_index != ifi->ifi_index
-				 || (G_filter.family && G_filter.family != ifa->ifa_family)
+				if ((int) ifa->ifa_index != (int) ifi->ifi_index
+				 || (G_filter.family && G_filter.family != (family_t) ifa->ifa_family)
 				) {
 					continue;
 				}
diff --git a/networking/libiproute/iplink.c b/networking/libiproute/iplink.c
index bad2017..8e9f1bd 100644
--- a/networking/libiproute/iplink.c
+++ b/networking/libiproute/iplink.c
@@ -279,7 +279,7 @@ static int ipaddr_list_link(char **argv)
 
 #ifndef NLMSG_TAIL
 #define NLMSG_TAIL(nmsg) \
-	((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
+	((struct rtattr *) ((size_t)((void *) (nmsg)) + (size_t) NLMSG_ALIGN((nmsg)->nlmsg_len)))
 #endif
 /* Return value becomes exitcode. It's okay to not return at all */
 static int do_change(char **argv, const unsigned rtm)
@@ -339,7 +339,7 @@ static int do_change(char **argv, const unsigned rtm)
 		addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
 		addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type_str,
 				strlen(type_str));
-		linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
+		linkinfo->rta_len = (size_t) NLMSG_TAIL(&req.n) - (size_t) linkinfo;
 	}
 	if (rtm != RTM_NEWLINK) {
 		if (!dev_str)
diff --git a/networking/libiproute/iproute.c b/networking/libiproute/iproute.c
index f8a67d9..03425fa 100644
--- a/networking/libiproute/iproute.c
+++ b/networking/libiproute/iproute.c
@@ -216,7 +216,7 @@ static int FAST_FUNC print_route(const struct sockaddr_nl *who UNUSED_PARAM,
 			return 0;
 		}
 
-		if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
+		if ((int) (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len) > G_filter.flushe) {
 			if (flush_update())
 				bb_error_msg_and_die("flush");
 		}
diff --git a/networking/libiproute/utils.c b/networking/libiproute/utils.c
index d0fe306..37c8f43 100644
--- a/networking/libiproute/utils.c
+++ b/networking/libiproute/utils.c
@@ -146,7 +146,7 @@ static void get_prefix_1(inet_prefix *dst, char *arg, int family)
 
 			netmask_pfx.family = AF_UNSPEC;
 			plen = bb_strtou(slash + 1, NULL, 0);
-			if ((errno || plen > dst->bitlen)
+			if ((errno || plen > (unsigned) dst->bitlen)
 			 && get_addr_1(&netmask_pfx, slash + 1, family) != 0
 			) {
 				goto bad;
@@ -162,7 +162,7 @@ static void get_prefix_1(inet_prefix *dst, char *arg, int family)
 
 				for (plen = 0; mask; mask <<= 1)
 					++plen;
-				if (plen > dst->bitlen)
+				if (plen > (unsigned) dst->bitlen)
 					goto bad;
 				/* dst->flags |= PREFIXLEN_SPECIFIED; */
 			}
diff --git a/networking/nc.c b/networking/nc.c
index 1b32e3a..96807e9 100644
--- a/networking/nc.c
+++ b/networking/nc.c
@@ -105,7 +105,7 @@ int nc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int nc_main(int argc, char **argv)
 {
 	/* sfd sits _here_ only because of "repeat" option (-l -l). */
-	int sfd = sfd; /* for gcc */
+	int sfd = 0;
 	int cfd = 0;
 	unsigned lport = 0;
 	IF_NOT_NC_SERVER(const) unsigned do_listen = 0;
diff --git a/networking/ntpd.c b/networking/ntpd.c
index 45f325b..df3daf0 100644
--- a/networking/ntpd.c
+++ b/networking/ntpd.c
@@ -984,12 +984,12 @@ select_and_cluster(void)
 	int        size = 3 * G.peer_cnt;
 	/* for selection algorithm */
 	point_t    point[size];
-	unsigned   num_points, num_candidates;
+	int        num_points, num_candidates;
 	double     low, high;
-	unsigned   num_falsetickers;
+	int        num_falsetickers;
 	/* for cluster algorithm */
 	survivor_t survivor[size];
-	unsigned   num_survivors;
+	int        num_survivors;
 
 	/* Selection */
 
@@ -1050,12 +1050,12 @@ select_and_cluster(void)
 	num_falsetickers = 0;
 	while (1) {
 		int c;
-		unsigned num_midpoints = 0;
+		int num_midpoints = 0;
 
 		low = 1 << 9;
 		high = - (1 << 9);
 		c = 0;
-		for (i = 0; i < num_points; i++) {
+		for (i = 0; i < (int) num_points; i++) {
 			/* We want to do:
 			 * if (point[i].type == -1) c++;
 			 * if (point[i].type == 1) c--;
@@ -1138,7 +1138,7 @@ select_and_cluster(void)
 	 * jitter until a termination condition is met.
 	 */
 	while (1) {
-		unsigned max_idx = max_idx;
+		static int max_idx;
 		double max_selection_jitter = max_selection_jitter;
 		double min_jitter = min_jitter;
 
diff --git a/networking/ping.c b/networking/ping.c
index d7b6fc6..f2f24e6 100644
--- a/networking/ping.c
+++ b/networking/ping.c
@@ -546,7 +546,7 @@ static void unpack_tail(int sz, uint32_t *tp,
 		uint16_t recv_seq, int ttl)
 {
 	const char *dupmsg = " (DUP!)";
-	unsigned triptime = triptime; /* for gcc */
+	unsigned triptime = 0;
 
 	++nreceived;
 
@@ -586,7 +586,7 @@ static void unpack4(char *buf, int sz, struct sockaddr_in *from)
 	int hlen;
 
 	/* discard if too short */
-	if (sz < (datalen + ICMP_MINLEN))
+	if (sz < (int) (datalen + ICMP_MINLEN))
 		return;
 
 	/* check IP header */
@@ -601,7 +601,7 @@ static void unpack4(char *buf, int sz, struct sockaddr_in *from)
 		uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
 		uint32_t *tp = NULL;
 
-		if (sz >= ICMP_MINLEN + sizeof(uint32_t))
+		if (sz >= (int) (ICMP_MINLEN + sizeof(uint32_t)))
 			tp = (uint32_t *) icmppkt->icmp_data;
 		unpack_tail(sz, tp,
 			inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
diff --git a/networking/telnetd.c b/networking/telnetd.c
index 33020f1..06b8d4d 100644
--- a/networking/telnetd.c
+++ b/networking/telnetd.c
@@ -488,8 +488,8 @@ int telnetd_main(int argc UNUSED_PARAM, char **argv)
 	struct tsession *ts;
 #if ENABLE_FEATURE_TELNETD_STANDALONE
 #define IS_INETD (opt & OPT_INETD)
-	int master_fd = master_fd; /* for compiler */
-	int sec_linger = sec_linger;
+	int master_fd = 0;
+	int sec_linger = 0;
 	char *opt_bindaddr = NULL;
 	char *opt_portnbr;
 #else
diff --git a/networking/tftp.c b/networking/tftp.c
index ce48a1e..9cafc08 100644
--- a/networking/tftp.c
+++ b/networking/tftp.c
@@ -380,7 +380,7 @@ static int tftp_protocol(
 		/* add filename and mode */
 		/* fill in packet if the filename fits into xbuf */
 		len = strlen(remote_file) + 1;
-		if (2 + len + sizeof("octet") >= io_bufsize) {
+		if (2 + len + sizeof("octet") >= (uint32_t) io_bufsize) {
 			bb_error_msg("remote filename is too long");
 			goto ret;
 		}
@@ -799,7 +799,7 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
 
 	error_msg = "malformed packet";
 	opcode = ntohs(*(uint16_t*)block_buf);
-	if (result < 4 || result >= sizeof(block_buf)
+	if (result < 4 || result >= (int) sizeof(block_buf)
 	 || block_buf[result-1] != '\0'
 	 || (IF_FEATURE_TFTP_PUT(opcode != TFTP_RRQ) /* not download */
 	     IF_GETPUT(&&)
diff --git a/procps/kill.c b/procps/kill.c
index cd189bc..cb129ac 100644
--- a/procps/kill.c
+++ b/procps/kill.c
@@ -196,7 +196,7 @@ int kill_main(int argc, char **argv)
 					ret = 1;
 					goto resume;
 				}
-				if (p->pid == omit)
+				if ((pid_t) p->pid == (pid_t) omit)
 					goto dont_kill;
 			}
 			kill(p->pid, signo);
diff --git a/procps/lsof.c b/procps/lsof.c
index 7e0ffa4..ee39ddb 100644
--- a/procps/lsof.c
+++ b/procps/lsof.c
@@ -54,7 +54,7 @@ int lsof_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 		char *fdlink;
 		struct dirent *entry;
 
-		if (getpid() == proc->pid)
+		if ((pid_t) getpid() == (pid_t) proc->pid)
 			continue;
 
 		baseofs = sprintf(name, "/proc/%u/fd/", proc->pid);
diff --git a/procps/mpstat.c b/procps/mpstat.c
index aa5a5c7..bef3909 100644
--- a/procps/mpstat.c
+++ b/procps/mpstat.c
@@ -85,7 +85,7 @@ struct stats_irq {
 struct globals {
 	int interval;
 	int count;
-	unsigned cpu_nr;                /* Number of CPUs */
+	int cpu_nr;                     /* Number of CPUs */
 	unsigned irqcpu_nr;             /* Number of interrupts per CPU */
 	unsigned softirqcpu_nr;         /* Number of soft interrupts per CPU */
 	unsigned options;
@@ -167,7 +167,7 @@ static ALWAYS_INLINE data_t jiffies_diff(data_t old, data_t new)
 	return (diff == 0) ? 1 : diff;
 }
 
-static int is_cpu_in_bitmap(unsigned cpu)
+static int is_cpu_in_bitmap(int cpu)
 {
 	return G.cpu_bitmap[cpu >> 3] & (1 << (cpu & 7));
 }
@@ -179,7 +179,8 @@ static void write_irqcpu_stats(struct stats_irqcpu *per_cpu_stats[],
 		const char *prev_str, const char *current_str)
 {
 	int j;
-	int offset, cpu;
+	int offset;
+	int cpu;
 	struct stats_irqcpu *p0, *q0;
 
 	/* Check if number of IRQs has changed */
@@ -462,7 +463,7 @@ static void get_cpu_statistics(struct stats_cpu *cpu, data_t *up, data_t *up0)
 
 	while (fgets(buf, sizeof(buf), fp)) {
 		data_t sum;
-		unsigned cpu_number;
+		int cpu_number;
 		struct stats_cpu *cp;
 
 		if (!starts_with_cpu(buf))
@@ -549,8 +550,8 @@ static void get_irqs_from_interrupts(const char *fname,
 	struct stats_irqcpu *ic;
 	char *buf;
 	unsigned buflen;
-	unsigned cpu;
-	unsigned irq;
+	int cpu;
+	int irq;
 	int cpu_index[G.cpu_nr];
 	int iindex;
 
@@ -605,7 +606,7 @@ static void get_irqs_from_interrupts(const char *fname,
 
 		ic = &per_cpu_stats[current][irq];
 		len = cp - buf;
-		if (len >= sizeof(ic->irq_name)) {
+		if (len >= (int) sizeof(ic->irq_name)) {
 			len = sizeof(ic->irq_name) - 1;
 		}
 		safe_strncpy(ic->irq_name, buf, len + 1);
@@ -672,7 +673,7 @@ static void alarm_handler(int sig UNUSED_PARAM)
 static void main_loop(void)
 {
 	unsigned current;
-	unsigned cpus;
+	int cpus;
 
 	/* Read the stats */
 	if (G.cpu_nr > 1) {
@@ -816,7 +817,7 @@ static int get_irqcpu_nr(const char *f, int max_irqs)
 	FILE *fp;
 	char *line;
 	unsigned linelen;
-	unsigned irq;
+	int irq;
 
 	fp = fopen_for_read(f);
 	if (!fp)  /* No interrupts file */
@@ -939,7 +940,7 @@ int mpstat_main(int UNUSED_PARAM argc, char **argv)
 				memset(G.cpu_bitmap, 0xff, G.cpu_bitmap_len);
 			} else {
 				/* Get CPU number */
-				unsigned n = xatoi_positive(t);
+				int n = xatoi_positive(t);
 				if (n >= G.cpu_nr)
 					bb_error_msg_and_die("not that many processors");
 				n++;
diff --git a/procps/pgrep.c b/procps/pgrep.c
index dc7ffff..044f553 100644
--- a/procps/pgrep.c
+++ b/procps/pgrep.c
@@ -150,9 +150,9 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
 			}
 		}
 
-		if (ppid2match >= 0 && ppid2match != proc->ppid)
+		if (ppid2match >= 0 && (pid_t) ppid2match != (pid_t) proc->ppid)
 			continue;
-		if (sid2match >= 0  && sid2match != proc->sid)
+		if (sid2match >= 0  && sid2match != (int) proc->sid)
 			continue;
 
 		/* NB: OPT_INVERT is always 0 or 1 */
diff --git a/procps/ps.c b/procps/ps.c
index 4727b21..3690305 100644
--- a/procps/ps.c
+++ b/procps/ps.c
@@ -634,7 +634,7 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 		OPT_l = (1 << ENABLE_SELINUX) * (1 << ENABLE_FEATURE_SHOW_THREADS) * ENABLE_FEATURE_PS_LONG,
 	};
 #if ENABLE_FEATURE_PS_LONG
-	time_t now = now;
+	time_t now = 0;
 	struct sysinfo info;
 #endif
 	int opts = 0;
diff --git a/procps/pstree.c b/procps/pstree.c
index 8ba3079..934fb6e 100644
--- a/procps/pstree.c
+++ b/procps/pstree.c
@@ -87,7 +87,7 @@ struct globals {
  */
 static void ensure_buffer_capacity(int bufindex)
 {
-	if (bufindex >= G.capacity) {
+	if (bufindex > 0 && (unsigned) bufindex >= G.capacity) {
 		G.capacity += 0x100;
 		G.width = xrealloc(G.width, G.capacity * sizeof(G.width[0]));
 		G.more = xrealloc(G.more, G.capacity * sizeof(G.more[0]));
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 2e62850..484d446 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -89,8 +89,8 @@ __hostc_flags	= -I$(obj) $(call flags,_hostc_flags)
 __hostcxx_flags	= -I$(obj) $(call flags,_hostcxx_flags)
 endif
 
-hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
-hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
+hostc_flags    = -Wp,-Wno-unused-result,-MD,$(depfile) $(__hostc_flags)
+hostcxx_flags  = -Wp,-Wno-unused-result,-MD,$(depfile) $(__hostcxx_flags)
 
 #####
 # Compile programs on the host
diff --git a/shell/ash.c b/shell/ash.c
index 1e1a229..3a258b9 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -2225,10 +2225,10 @@ setvar(const char *name, const char *val, int flags)
 
 	INT_OFF;
 	nameeq = ckmalloc(namelen + vallen + 2);
-	p = memcpy(nameeq, name, namelen) + namelen;
+	p = (char*) ((uint32_t) memcpy(nameeq, name, namelen) + namelen);
 	if (val) {
 		*p++ = '=';
-		p = memcpy(p, val, vallen) + vallen;
+		p = (char*) ((uint32_t) memcpy(p, val, vallen) + vallen);
 	}
 	*p = '\0';
 	setvareq(nameeq, flags | VNOSAVE);
@@ -6363,7 +6363,7 @@ subevalvar(char *p, char *varname, int strloc, int subtype,
 
 #if ENABLE_ASH_BASH_COMPAT
 	case VSSUBSTR:
-		loc = str = stackblock() + strloc;
+		loc = str = (char*) ((uint32_t) stackblock() + strloc);
 		/* Read POS in ${var:POS:LEN} */
 		pos = atoi(loc); /* number(loc) errors out on "1:4" */
 		len = str - startp - 1;
diff --git a/util-linux/mount.c b/util-linux/mount.c
index ca04de7..34543bb 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -898,7 +898,7 @@ static char *nfs_strerror(int status)
 {
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(nfs_err_stat); i++) {
+	for (i = 0; i < (int) ARRAY_SIZE(nfs_err_stat); i++) {
 		if (nfs_err_stat[i] == status)
 			return strerror(nfs_err_errnum[i]);
 	}