diff --git a/applypatch/applypatch.c b/applypatch/applypatch.c
index cb9bc23..9e631dd 100644
--- a/applypatch/applypatch.c
+++ b/applypatch/applypatch.c
@@ -247,7 +247,7 @@
                     break;
             }
             if (next != read) {
-                printf("short read (%d bytes of %d) for partition \"%s\"\n",
+                printf("short read (%zu bytes of %zu) for partition \"%s\"\n",
                        read, next, partition);
                 free(file->data);
                 file->data = NULL;
@@ -274,7 +274,7 @@
         if (memcmp(sha_so_far, parsed_sha, SHA_DIGEST_SIZE) == 0) {
             // we have a match.  stop reading the partition; we'll return
             // the data we've read so far.
-            printf("partition read matched size %d sha %s\n",
+            printf("partition read matched size %zu sha %s\n",
                    size[index[i]], sha1sum[index[i]]);
             break;
         }
@@ -402,7 +402,7 @@
 
             size_t written = mtd_write_data(ctx, (char*)data, len);
             if (written != len) {
-                printf("only wrote %d of %d bytes to MTD %s\n",
+                printf("only wrote %zu of %zu bytes to MTD %s\n",
                        written, len, partition);
                 mtd_write_close(ctx);
                 return -1;
@@ -476,20 +476,20 @@
                             if (errno == EINTR) {
                                 read_count = 0;
                             } else {
-                                printf("verify read error %s at %d: %s\n",
+                                printf("verify read error %s at %zu: %s\n",
                                        partition, p, strerror(errno));
                                 return -1;
                             }
                         }
                         if ((size_t)read_count < to_read) {
-                            printf("short verify read %s at %d: %d %d %s\n",
+                            printf("short verify read %s at %zu: %zd %zu %s\n",
                                    partition, p, read_count, to_read, strerror(errno));
                         }
                         so_far += read_count;
                     }
 
                     if (memcmp(buffer, data+p, to_read)) {
-                        printf("verification failed starting at %d\n", p);
+                        printf("verification failed starting at %zu\n", p);
                         start = p;
                         break;
                     }
diff --git a/applypatch/imgpatch.c b/applypatch/imgpatch.c
index 3a1df38..af4d072 100644
--- a/applypatch/imgpatch.c
+++ b/applypatch/imgpatch.c
@@ -18,6 +18,7 @@
 // format.
 
 #include <stdio.h>
+#include <sys/cdefs.h>
 #include <sys/stat.h>
 #include <errno.h>
 #include <unistd.h>
@@ -35,7 +36,7 @@
  * file, and update the SHA context with the output data as well.
  * Return 0 on success.
  */
-int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
+int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size __unused,
                     const Value* patch,
                     SinkFn sink, void* token, SHA_CTX* ctx,
                     const Value* bonus_data) {
@@ -132,7 +133,7 @@
 
             unsigned char* expanded_source = malloc(expanded_len);
             if (expanded_source == NULL) {
-                printf("failed to allocate %d bytes for expanded_source\n",
+                printf("failed to allocate %zu bytes for expanded_source\n",
                        expanded_len);
                 return -1;
             }
@@ -163,7 +164,7 @@
             // We should have filled the output buffer exactly, except
             // for the bonus_size.
             if (strm.avail_out != bonus_size) {
-                printf("source inflation short by %d bytes\n", strm.avail_out-bonus_size);
+                printf("source inflation short by %zu bytes\n", strm.avail_out-bonus_size);
                 return -1;
             }
             inflateEnd(&strm);
diff --git a/minadbd/sockets.c b/minadbd/sockets.c
index 2dd6461..817410d 100644
--- a/minadbd/sockets.c
+++ b/minadbd/sockets.c
@@ -319,7 +319,8 @@
 
         while(avail > 0) {
             r = adb_read(fd, x, avail);
-            D("LS(%d): post adb_read(fd=%d,...) r=%d (errno=%d) avail=%d\n", s->id, s->fd, r, r<0?errno:0, avail);
+            D("LS(%d): post adb_read(fd=%d,...) r=%d (errno=%d) avail=%zu\n",
+              s->id, s->fd, r, r<0?errno:0, avail);
             if(r > 0) {
                 avail -= r;
                 x += r;
diff --git a/minadbd/transport.c b/minadbd/transport.c
index 4c0c97f..92679f5 100644
--- a/minadbd/transport.c
+++ b/minadbd/transport.c
@@ -713,7 +713,7 @@
     char *p = ptr;
     int r;
 #if ADB_TRACE
-    int  len0 = len;
+    size_t len0 = len;
 #endif
     D("readx: fd=%d wanted=%d\n", fd, (int)len);
     while(len > 0) {
@@ -734,7 +734,7 @@
     }
 
 #if ADB_TRACE
-    D("readx: fd=%d wanted=%d got=%d\n", fd, len0, len0 - len);
+    D("readx: fd=%d wanted=%zu got=%zu\n", fd, len0, len0 - len);
     dump_hex( ptr, len0 );
 #endif
     return 0;
diff --git a/minadbd/usb_linux_client.c b/minadbd/usb_linux_client.c
index c135d63..29bab15 100644
--- a/minadbd/usb_linux_client.c
+++ b/minadbd/usb_linux_client.c
@@ -388,7 +388,7 @@
         ret = adb_read(bulk_out, buf + count, length - count);
         if (ret < 0) {
             if (errno != EINTR) {
-                D("[ bulk_read failed fd=%d length=%d count=%d ]\n",
+                D("[ bulk_read failed fd=%d length=%zu count=%zu ]\n",
                                            bulk_out, length, count);
                 return ret;
             }
diff --git a/minui/graphics_fbdev.c b/minui/graphics_fbdev.c
index 6a6330b..bb91975 100644
--- a/minui/graphics_fbdev.c
+++ b/minui/graphics_fbdev.c
@@ -21,6 +21,7 @@
 #include <fcntl.h>
 #include <stdio.h>
 
+#include <sys/cdefs.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <sys/types.h>
@@ -55,7 +56,7 @@
     return &my_backend;
 }
 
-static void fbdev_blank(minui_backend* backend, bool blank)
+static void fbdev_blank(minui_backend* backend __unused, bool blank)
 {
     int ret;
 
@@ -174,7 +175,7 @@
     return gr_draw;
 }
 
-static gr_surface fbdev_flip(minui_backend* backend) {
+static gr_surface fbdev_flip(minui_backend* backend __unused) {
     if (double_buffered) {
         // Change gr_draw to point to the buffer currently displayed,
         // then flip the driver so we're displaying the other buffer
@@ -189,7 +190,7 @@
     return gr_draw;
 }
 
-static void fbdev_exit(minui_backend* backend) {
+static void fbdev_exit(minui_backend* backend __unused) {
     close(fb_fd);
     fb_fd = -1;
 
diff --git a/minui/resources.c b/minui/resources.c
index df813cb..a6528b3 100644
--- a/minui/resources.c
+++ b/minui/resources.c
@@ -95,7 +95,7 @@
     png_read_info(png_ptr, info_ptr);
 
     int color_type, bit_depth;
-    size_t width, height;
+    png_uint_32 width, height;
     png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth,
             &color_type, NULL, NULL, NULL);
 
diff --git a/recovery.cpp b/recovery.cpp
index 43cd9da..57e19c0 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -177,11 +177,11 @@
     stage = strndup(boot.stage, sizeof(boot.stage));
 
     if (boot.command[0] != 0 && boot.command[0] != 255) {
-        LOGI("Boot command: %.*s\n", sizeof(boot.command), boot.command);
+        LOGI("Boot command: %.*s\n", (int)sizeof(boot.command), boot.command);
     }
 
     if (boot.status[0] != 0 && boot.status[0] != 255) {
-        LOGI("Boot status: %.*s\n", sizeof(boot.status), boot.status);
+        LOGI("Boot status: %.*s\n", (int)sizeof(boot.status), boot.status);
     }
 
     // --- if arguments weren't supplied, look in the bootloader control block
diff --git a/tools/ota/add-property-tag.c b/tools/ota/add-property-tag.c
index 5277edd..aab30b2 100644
--- a/tools/ota/add-property-tag.c
+++ b/tools/ota/add-property-tag.c
@@ -57,9 +57,9 @@
     const char *end = line + strlen(line);
     while (end > line && isspace(end[-1])) --end;
     if (number > 0) {
-        fprintf(out, "%.*s%s%d%s", end - line, line, tag, number, end);
+        fprintf(out, "%.*s%s%d%s", (int)(end - line), line, tag, number, end);
     } else {
-        fprintf(out, "%.*s%s%s", end - line, line, tag, end);
+        fprintf(out, "%.*s%s%s", (int)(end - line), line, tag, end);
     }
 }
 
diff --git a/updater/install.c b/updater/install.c
index aebd4f3..872cbf8 100644
--- a/updater/install.c
+++ b/updater/install.c
@@ -866,7 +866,7 @@
 
     buffer = malloc(st.st_size+1);
     if (buffer == NULL) {
-        ErrorAbort(state, "%s: failed to alloc %lld bytes", name, st.st_size+1);
+        ErrorAbort(state, "%s: failed to alloc %lld bytes", name, (long long)st.st_size+1);
         goto done;
     }
 
@@ -879,7 +879,7 @@
 
     if (fread(buffer, 1, st.st_size, f) != st.st_size) {
         ErrorAbort(state, "%s: failed to read %lld bytes from %s",
-                   name, st.st_size+1, filename);
+                   name, (long long)st.st_size+1, filename);
         fclose(f);
         goto done;
     }
diff --git a/verifier.cpp b/verifier.cpp
index 0930fbd..019552b 100644
--- a/verifier.cpp
+++ b/verifier.cpp
@@ -152,7 +152,7 @@
 
     size_t comment_size = footer[4] + (footer[5] << 8);
     size_t signature_start = footer[0] + (footer[1] << 8);
-    LOGI("comment is %d bytes; signature %d bytes from end\n",
+    LOGI("comment is %zu bytes; signature %zu bytes from end\n",
          comment_size, signature_start);
 
     if (signature_start <= FOOTER_SIZE) {
@@ -292,24 +292,24 @@
         if (pKeys[i].key_type == Certificate::RSA) {
             if (sig_der_length < RSANUMBYTES) {
                 // "signature" block isn't big enough to contain an RSA block.
-                LOGI("signature is too short for RSA key %d\n", i);
+                LOGI("signature is too short for RSA key %zu\n", i);
                 continue;
             }
 
             if (!RSA_verify(pKeys[i].rsa, sig_der, RSANUMBYTES,
                             hash, pKeys[i].hash_len)) {
-                LOGI("failed to verify against RSA key %d\n", i);
+                LOGI("failed to verify against RSA key %zu\n", i);
                 continue;
             }
 
-            LOGI("whole-file signature verified against RSA key %d\n", i);
+            LOGI("whole-file signature verified against RSA key %zu\n", i);
             free(sig_der);
             return VERIFY_SUCCESS;
         } else if (pKeys[i].key_type == Certificate::EC
                 && pKeys[i].hash_len == SHA256_DIGEST_SIZE) {
             p256_int r, s;
             if (!dsa_sig_unpack(sig_der, sig_der_length, &r, &s)) {
-                LOGI("Not a DSA signature block for EC key %d\n", i);
+                LOGI("Not a DSA signature block for EC key %zu\n", i);
                 continue;
             }
 
@@ -317,11 +317,11 @@
             p256_from_bin(hash, &p256_hash);
             if (!p256_ecdsa_verify(&(pKeys[i].ec->x), &(pKeys[i].ec->y),
                                    &p256_hash, &r, &s)) {
-                LOGI("failed to verify against EC key %d\n", i);
+                LOGI("failed to verify against EC key %zu\n", i);
                 continue;
             }
 
-            LOGI("whole-file signature verified against EC key %d\n", i);
+            LOGI("whole-file signature verified against EC key %zu\n", i);
             free(sig_der);
             return VERIFY_SUCCESS;
         } else {