diff --git a/src/basic/fileio.c b/src/basic/fileio.c
index 9ee7a4af38..0ae330541d 100644
--- a/src/basic/fileio.c
+++ b/src/basic/fileio.c
@@ -1556,7 +1556,7 @@ int read_line(FILE *f, size_t limit, char **ret) {
         }
 
         {
-                _cleanup_(funlockfilep) FILE *flocked = f;
+                _unused_ _cleanup_(funlockfilep) FILE *flocked = f;
                 flockfile(f);
 
                 for (;;) {
diff --git a/src/basic/terminal-util.c b/src/basic/terminal-util.c
index 28c8c35fe0..fdf2b098f6 100644
--- a/src/basic/terminal-util.c
+++ b/src/basic/terminal-util.c
@@ -245,7 +245,6 @@ int ask_string(char **ret, const char *text, ...) {
 
 int reset_terminal_fd(int fd, bool switch_to_text) {
         struct termios termios;
-        _cleanup_free_ char *utf8 = NULL;
         int r = 0;
 
         /* Set terminal to some sane defaults */
diff --git a/src/core/dbus-execute.c b/src/core/dbus-execute.c
index 26c6e039b8..4dbd6b0f6f 100644
--- a/src/core/dbus-execute.c
+++ b/src/core/dbus-execute.c
@@ -1177,8 +1177,6 @@ int bus_exec_context_set_transient_property(
                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid personality");
 
                 if (mode != UNIT_CHECK) {
-                        _cleanup_free_ char *str = NULL;
-
                         c->personality = p;
                         unit_write_drop_in_private_format(u, mode, name, "%s=%s", name, s);
                 }
diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c
index ae0a8da63a..f9a0a14d9e 100644
--- a/src/gpt-auto-generator/gpt-auto-generator.c
+++ b/src/gpt-auto-generator/gpt-auto-generator.c
@@ -56,7 +56,7 @@ static bool arg_root_enabled = true;
 static bool arg_root_rw = false;
 
 static int add_cryptsetup(const char *id, const char *what, bool rw, bool require, char **device) {
-        _cleanup_free_ char *e = NULL, *n = NULL, *p = NULL, *d = NULL, *to = NULL;
+        _cleanup_free_ char *e = NULL, *n = NULL, *p = NULL, *d = NULL;
         _cleanup_fclose_ FILE *f = NULL;
         char *ret;
         int r;
diff --git a/src/import/importd.c b/src/import/importd.c
index 22ac5fcc84..e23d6d0c80 100644
--- a/src/import/importd.c
+++ b/src/import/importd.c
@@ -251,7 +251,7 @@ static void transfer_send_logs(Transfer *t, bool flush) {
                 n = strndup(t->log_message, e - t->log_message);
 
                 /* Skip over NUL and newlines */
-                while ((e < t->log_message + t->log_message_size) && IN_SET(*e, 0, '\n'))
+                while (e < t->log_message + t->log_message_size && (*e == 0 || *e == '\n'))
                         e++;
 
                 memmove(t->log_message, e, t->log_message + sizeof(t->log_message) - e);
diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index 3027801ab1..5d70421b76 100644
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -90,6 +90,10 @@
 /* The mmap context to use for the header we pick as one above the last defined typed */
 #define CONTEXT_HEADER _OBJECT_TYPE_MAX
 
+#ifdef __clang__
+#  pragma GCC diagnostic ignored "-Waddress-of-packed-member"
+#endif
+
 /* This may be called from a separate thread to prevent blocking the caller for the duration of fsync().
  * As a result we use atomic operations on f->offline_state for inter-thread communications with
  * journal_file_set_offline() and journal_file_set_online(). */
diff --git a/src/journal/journald-native.c b/src/journal/journald-native.c
index d45c9c2270..1ff4e29849 100644
--- a/src/journal/journald-native.c
+++ b/src/journal/journald-native.c
@@ -332,7 +332,7 @@ void server_process_native_message(
                 const char *label, size_t label_len) {
 
         size_t remaining = buffer_size;
-        ClientContext *context;
+        ClientContext *context = NULL;
         int r;
 
         assert(s);
diff --git a/src/libsystemd/sd-bus/test-bus-benchmark.c b/src/libsystemd/sd-bus/test-bus-benchmark.c
index 6f0ca47df6..2bb435b976 100644
--- a/src/libsystemd/sd-bus/test-bus-benchmark.c
+++ b/src/libsystemd/sd-bus/test-bus-benchmark.c
@@ -228,7 +228,7 @@ int main(int argc, char *argv[]) {
         } mode = MODE_BISECT;
         Type type = TYPE_LEGACY;
         int i, pair[2] = { -1, -1 };
-        _cleanup_free_ char *name = NULL, *bus_name = NULL, *address = NULL, *server_name = NULL;
+        _cleanup_free_ char *address = NULL, *server_name = NULL;
         _cleanup_close_ int bus_ref = -1;
         const char *unique;
         cpu_set_t cpuset;
diff --git a/src/login/logind-session.c b/src/login/logind-session.c
index 730acd2978..db4dc45e05 100644
--- a/src/login/logind-session.c
+++ b/src/login/logind-session.c
@@ -1136,7 +1136,6 @@ void session_restore_vt(Session *s) {
                 .mode = VT_AUTO,
         };
 
-        _cleanup_free_ char *utf8 = NULL;
         int vt, old_fd;
 
         /* We need to get a fresh handle to the virtual terminal,
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 70039940bc..fd063e43d2 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -3573,7 +3573,8 @@ int link_save(Link *link) {
                         if (r < 0)
                                 goto fail;
 
-                        fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%hhu/"USEC_FMT, space ? " " : "", route_str,
+                        fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
+                                space ? " " : "", route_str,
                                 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
                         space = true;
                 }
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 200d0f622d..574bd0f5cb 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -1142,8 +1142,12 @@ static int manager_save(Manager *m) {
                                 goto fail;
                 }
 
-                fprintf(f, "from=%s%s/%hhu to=%s%s/%hhu tos=%hhu fwmark=%"PRIu32"/%"PRIu32" table=%hhu", space ? " " : "", from_str,
-                        rule->from_prefixlen, space ? " " : "", to_str, rule->to_prefixlen, rule->tos, rule->fwmark, rule->fwmask, rule->table);
+                fprintf(f, "from=%s%s/%hhu to=%s%s/%hhu tos=%hhu fwmark=%"PRIu32"/%"PRIu32" table=%"PRIu32,
+                        space ? " " : "", from_str, rule->from_prefixlen,
+                        space ? " " : "", to_str, rule->to_prefixlen,
+                        rule->tos,
+                        rule->fwmark, rule->fwmask,
+                        rule->table);
 
                 fputc('\n', f);
         }
diff --git a/src/network/networkd-routing-policy-rule.c b/src/network/networkd-routing-policy-rule.c
index 6850135fc1..d37f31a4cf 100644
--- a/src/network/networkd-routing-policy-rule.c
+++ b/src/network/networkd-routing-policy-rule.c
@@ -672,7 +672,6 @@ int config_parse_routing_policy_rule_fwmark_mask(
                 void *userdata) {
 
         _cleanup_routing_policy_rule_free_ RoutingPolicyRule *n = NULL;
-        _cleanup_free_ char *fwmark = NULL;
         Network *network = userdata;
         int r;
 
@@ -751,7 +750,7 @@ int config_parse_routing_policy_rule_prefix(
 }
 
 static int routing_policy_rule_read_full_file(char *state_file, char **ret) {
-        _cleanup_free_ char *s = NULL, *p = NULL;
+        _cleanup_free_ char *s = NULL;
         size_t size;
         int r;
 
diff --git a/src/shared/path-lookup.c b/src/shared/path-lookup.c
index 802e4b9c8d..26dbb482ef 100644
--- a/src/shared/path-lookup.c
+++ b/src/shared/path-lookup.c
@@ -245,7 +245,6 @@ static int acquire_generator_dirs(
                 char **generator_early,
                 char **generator_late) {
 
-        _cleanup_(rmdir_and_freep) char *t = NULL;
         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL;
         const char *prefix;
 
diff --git a/src/test/test-fileio.c b/src/test/test-fileio.c
index 27495fa5be..c78eb51b42 100644
--- a/src/test/test-fileio.c
+++ b/src/test/test-fileio.c
@@ -704,7 +704,6 @@ static void test_read_line_one_file(FILE *f) {
 
 static void test_read_line(void) {
         _cleanup_fclose_ FILE *f = NULL;
-        _cleanup_free_ char *line = NULL;
 
         f = fmemopen((void*) buffer, sizeof(buffer), "re");
         assert_se(f);
diff --git a/src/test/test-util.c b/src/test/test-util.c
index f8bf0cb875..0a0cb7b55e 100644
--- a/src/test/test-util.c
+++ b/src/test/test-util.c
@@ -104,6 +104,11 @@ static void test_max(void) {
         assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
 }
 
+#pragma GCC diagnostic push
+#ifdef __clang__
+#  pragma GCC diagnostic ignored "-Waddress-of-packed-member"
+#endif
+
 static void test_container_of(void) {
         struct mytype {
                 uint8_t pad1[3];
@@ -122,6 +127,8 @@ static void test_container_of(void) {
                                v1) == &myval);
 }
 
+#pragma GCC diagnostic pop
+
 static void test_div_round_up(void) {
         int div;