features: include compile-time enable/disable state of features when printing version

client.c

@@ -16,6 +16,7 @@
 #define LOG_ENABLE_DBG 0
 #include "log.h"
 #include "client-protocol.h"
+#include "foot-features.h"
 #include "version.h"
 #include "xmalloc.h"
 
@@ -27,6 +28,15 @@ sig_handler(int signo)
     aborted = 1;
 }
 
+static const char *
+version_and_features(void)
+{
+    static char buf[256];
+    snprintf(buf, sizeof(buf), "version: %s %cime",
+             FOOT_VERSION, feature_ime() ? '+' : '-');
+    return buf;
+}
+
 static void
 print_usage(const char *prog_name)
 {
@@ -155,7 +165,7 @@ main(int argc, char *const *argv)
             break;
 
         case 'v':
-            printf("footclient version %s\n", FOOT_VERSION);
+            printf("footclient %s\n", version_and_features());
             return EXIT_SUCCESS;
 
         case 'h':

foot-features.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <stdbool.h>
+
+static inline bool feature_ime(void)
+{
+#if defined(FOOT_IME_ENABLED) && FOOT_IME_ENABLED
+    return true;
+#else
+    return false;
+#endif
+}

main.c

@@ -21,6 +21,7 @@
 #include "log.h"
 
 #include "config.h"
+#include "foot-features.h"
 #include "fdm.h"
 #include "reaper.h"
 #include "render.h"
@@ -39,6 +40,15 @@ sig_handler(int signo)
     aborted = 1;
 }
 
+static const char *
+version_and_features(void)
+{
+    static char buf[256];
+    snprintf(buf, sizeof(buf), "version: %s %cime",
+             FOOT_VERSION, feature_ime() ? '+' : '-');
+    return buf;
+}
+
 static void
 print_usage(const char *prog_name)
 {
@@ -325,7 +335,7 @@ main(int argc, char *const *argv)
             break;
 
         case 'v':
-            printf("foot version %s\n", FOOT_VERSION);
+            printf("foot %s\n", version_and_features());
             return EXIT_SUCCESS;
 
         case 'h':
@@ -343,7 +353,7 @@ main(int argc, char *const *argv)
     argc -= optind;
     argv += optind;
 
-    LOG_INFO("version: %s", FOOT_VERSION);
+    LOG_INFO("%s", version_and_features());
 
     {
         struct utsname name;

meson.build

@@ -151,6 +151,7 @@ executable(
   'commands.c', 'commands.h',
   'extract.c', 'extract.h',
   'fdm.c', 'fdm.h',
+  'foot-features.h',
   'ime.c', 'ime.h',
   'input.c', 'input.h',
   'main.c',
@@ -174,6 +175,7 @@ executable(
 executable(
   'footclient',
   'client.c', 'client-protocol.h',
+  'foot-features.h',
   'log.c', 'log.h',
   'macros.h',
   'xmalloc.c', 'xmalloc.h',