tree-wide: add SD_ID128_MAKE_STR, remove LOG_MESSAGE_ID

Embedding sd_id128_t's in constant strings was rather cumbersome. We had
SD_ID128_CONST_STR which returned a const char[], but it had two problems:
- it wasn't possible to statically concatanate this array with a normal string
- gcc wasn't really able to optimize this, and generated code to perform the
  "conversion" at runtime.
Because of this, even our own code in coredumpctl wasn't using
SD_ID128_CONST_STR.

Add a new macro to generate a constant string: SD_ID128_MAKE_STR.
It is not as elegant as SD_ID128_CONST_STR, because it requires a repetition
of the numbers, but in practice it is more convenient to use, and allows gcc
to generate smarter code:

$ size .libs/systemd{,-logind,-journald}{.old,}
   text	   data	    bss	    dec	    hex	filename
1265204	 149564	   4808	1419576	 15a938	.libs/systemd.old
1260268	 149564	   4808	1414640	 1595f0	.libs/systemd
 246805	  13852	    209	 260866	  3fb02	.libs/systemd-logind.old
 240973	  13852	    209	 255034	  3e43a	.libs/systemd-logind
 146839	   4984	     34	 151857	  25131	.libs/systemd-journald.old
 146391	   4984	     34	 151409	  24f71	.libs/systemd-journald

It is also much easier to check if a certain binary uses a certain MESSAGE_ID:

$ strings .libs/systemd.old|grep MESSAGE_ID
MESSAGE_ID=%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x
MESSAGE_ID=%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x
MESSAGE_ID=%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x
MESSAGE_ID=%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x

$ strings .libs/systemd|grep MESSAGE_ID
MESSAGE_ID=c7a787079b354eaaa9e77b371893cd27
MESSAGE_ID=b07a249cd024414a82dd00cd181378ff
MESSAGE_ID=641257651c1b4ec9a8624d7a40a9e1e7
MESSAGE_ID=de5b426a63be47a7b6ac3eaac82e2f6f
MESSAGE_ID=d34d037fff1847e6ae669a370e694725
MESSAGE_ID=7d4958e842da4a758f6c1cdc7b36dcc5
MESSAGE_ID=1dee0369c7fc4736b7099b38ecb46ee7
MESSAGE_ID=39f53479d3a045ac8e11786248231fbf
MESSAGE_ID=be02cf6855d2428ba40df7e9d022f03d
MESSAGE_ID=7b05ebc668384222baa8881179cfda54
MESSAGE_ID=9d1aaa27d60140bd96365438aad20286

4 files changed, 12 insertions, 12 deletions

diff --git a/src/login/logind-button.c b/src/login/logind-button.c
index 90fb93bbaf..d739af8ea2 100644
--- a/src/login/logind-button.c
+++ b/src/login/logind-button.c
@@ -155,7 +155,7 @@ static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *u
                 case KEY_POWER2:
                         log_struct(LOG_INFO,
                                    LOG_MESSAGE("Power key pressed."),
-                                   LOG_MESSAGE_ID(SD_MESSAGE_POWER_KEY),
+                                   "MESSAGE_ID=" SD_MESSAGE_POWER_KEY_STR,
                                    NULL);
 
                         manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
@@ -170,7 +170,7 @@ static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *u
                 case KEY_SLEEP:
                         log_struct(LOG_INFO,
                                    LOG_MESSAGE("Suspend key pressed."),
-                                   LOG_MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY),
+                                   "MESSAGE_ID=" SD_MESSAGE_SUSPEND_KEY_STR,
                                    NULL);
 
                         manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
@@ -179,7 +179,7 @@ static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *u
                 case KEY_SUSPEND:
                         log_struct(LOG_INFO,
                                    LOG_MESSAGE("Hibernate key pressed."),
-                                   LOG_MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY),
+                                   "MESSAGE_ID=" SD_MESSAGE_HIBERNATE_KEY_STR,
                                    NULL);
 
                         manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
@@ -191,7 +191,7 @@ static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *u
                 if (ev.code == SW_LID) {
                         log_struct(LOG_INFO,
                                    LOG_MESSAGE("Lid closed."),
-                                   LOG_MESSAGE_ID(SD_MESSAGE_LID_CLOSED),
+                                   "MESSAGE_ID=" SD_MESSAGE_LID_CLOSED_STR,
                                    NULL);
 
                         b->lid_closed = true;
@@ -201,7 +201,7 @@ static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *u
                 } else if (ev.code == SW_DOCK) {
                         log_struct(LOG_INFO,
                                    LOG_MESSAGE("System docked."),
-                                   LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED),
+                                   "MESSAGE_ID=" SD_MESSAGE_SYSTEM_DOCKED_STR,
                                    NULL);
 
                         b->docked = true;
@@ -212,7 +212,7 @@ static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *u
                 if (ev.code == SW_LID) {
                         log_struct(LOG_INFO,
                                    LOG_MESSAGE("Lid opened."),
-                                   LOG_MESSAGE_ID(SD_MESSAGE_LID_OPENED),
+                                   "MESSAGE_ID=" SD_MESSAGE_LID_OPENED_STR,
                                    NULL);
 
                         b->lid_closed = false;
@@ -221,7 +221,7 @@ static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *u
                 } else if (ev.code == SW_DOCK) {
                         log_struct(LOG_INFO,
                                    LOG_MESSAGE("System undocked."),
-                                   LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED),
+                                   "MESSAGE_ID=" SD_MESSAGE_SYSTEM_UNDOCKED_STR,
                                    NULL);
 
                         b->docked = false;
diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index ad44ca290e..c6be596af3 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -1430,7 +1430,7 @@ static int bus_manager_log_shutdown(
                 p = strjoina(p, " (", m->wall_message, ").");
 
         return log_struct(LOG_NOTICE,
-                          LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
+                          "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
                           p,
                           q,
                           NULL);
diff --git a/src/login/logind-seat.c b/src/login/logind-seat.c
index bfbd07309d..e4836fcaab 100644
--- a/src/login/logind-seat.c
+++ b/src/login/logind-seat.c
@@ -416,7 +416,7 @@ int seat_start(Seat *s) {
                 return 0;
 
         log_struct(LOG_INFO,
-                   LOG_MESSAGE_ID(SD_MESSAGE_SEAT_START),
+                   "MESSAGE_ID=" SD_MESSAGE_SEAT_START_STR,
                    "SEAT_ID=%s", s->id,
                    LOG_MESSAGE("New seat %s.", s->id),
                    NULL);
@@ -444,7 +444,7 @@ int seat_stop(Seat *s, bool force) {
 
         if (s->started)
                 log_struct(LOG_INFO,
-                           LOG_MESSAGE_ID(SD_MESSAGE_SEAT_STOP),
+                           "MESSAGE_ID=" SD_MESSAGE_SEAT_STOP_STR,
                            "SEAT_ID=%s", s->id,
                            LOG_MESSAGE("Removed seat %s.", s->id),
                            NULL);
diff --git a/src/login/logind-session.c b/src/login/logind-session.c
index fd7fcf7f2c..4a168906d6 100644
--- a/src/login/logind-session.c
+++ b/src/login/logind-session.c
@@ -561,7 +561,7 @@ int session_start(Session *s) {
                 return r;
 
         log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO,
-                   LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START),
+                   "MESSAGE_ID=" SD_MESSAGE_SESSION_START_STR,
                    "SESSION_ID=%s", s->id,
                    "USER_ID=%s", s->user->name,
                    "LEADER="PID_FMT, s->leader,
@@ -666,7 +666,7 @@ int session_finalize(Session *s) {
 
         if (s->started)
                 log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO,
-                           LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP),
+                           "MESSAGE_ID=" SD_MESSAGE_SESSION_STOP_STR,
                            "SESSION_ID=%s", s->id,
                            "USER_ID=%s", s->user->name,
                            "LEADER="PID_FMT, s->leader,