From 742bb6af1cc73d3762419d1bb5d181eaf01371bc Mon Sep 17 00:00:00 2001
From: Vladimir Stoiakin <VStoiakin@lavabit.com>
Date: Sat, 27 Sep 2025 23:23:41 +0300
Subject: [PATCH] build: do not allow to compile f0rmz and unl0kr without
 graphical backends

---
 f0rmz/config.c    |  2 +-
 shared/backends.c | 17 ++++++-----------
 shared/backends.h | 15 +++++++--------
 unl0kr/config.c   |  2 +-
 4 files changed, 15 insertions(+), 21 deletions(-)

diff --git a/f0rmz/config.c b/f0rmz/config.c
index a5a4998..a0d9d98 100644
--- a/f0rmz/config.c
+++ b/f0rmz/config.c
@@ -165,7 +165,7 @@ static int parsing_handler(void* user_data, const char* section, const char* key
  */
 
 void f0_config_init_opts(f0_config_opts *opts) {
-    opts->general.backend = bbx_backends_backends[0] == NULL ? BBX_BACKENDS_BACKEND_NONE : 0;
+    opts->general.backend = 0;
     opts->intro.title = "A Form!";
     opts->intro.body = "Please complete the following form.";
     opts->theme.default_id = BBX_THEMES_THEME_BREEZY_DARK;
diff --git a/shared/backends.c b/shared/backends.c
index 74cfd6b..b845ea5 100644
--- a/shared/backends.c
+++ b/shared/backends.c
@@ -6,28 +6,23 @@
 
 #include "backends.h"
 
-#include "../shared/log.h"
+#include "log.h"
 
 #include <string.h>
 
-
-/**
- * Public interface
- */
-
-const char *bbx_backends_backends[] = {
+static const char *backends[] = {
 #if LV_USE_LINUX_FBDEV
     "fbdev",
-#endif /* LV_USE_LINUX_FBDEV */
+#endif
 #if LV_USE_LINUX_DRM
     "drm",
-#endif /* LV_USE_LINUX_DRM */
+#endif
     NULL
 };
 
 bbx_backends_backend_id_t bbx_backends_find_backend_with_name(const char *name) {
-    for (int i = 0; bbx_backends_backends[i] != NULL; ++i) {
-        if (strcmp(bbx_backends_backends[i], name) == 0) {
+    for (int i = 0; backends[i] != NULL; ++i) {
+        if (strcmp(backends[i], name) == 0) {
             bbx_log(BBX_LOG_LEVEL_VERBOSE, "Found backend: %s\n", name);
             return i;
         }
diff --git a/shared/backends.h b/shared/backends.h
index 1bd4766..639ec14 100644
--- a/shared/backends.h
+++ b/shared/backends.h
@@ -7,7 +7,11 @@
 #ifndef BBX_BACKENDS_H
 #define BBX_BACKENDS_H
 
-#include "lvgl/lvgl.h"
+#include "lv_conf.h"
+
+#if LV_USE_LINUX_FBDEV == 0 && LV_USE_LINUX_DRM == 0
+#error Neither of graphical backends is enabled
+#endif
 
 /**
  * Backend identifiers
@@ -18,17 +22,12 @@ typedef enum {
     BBX_BACKENDS_BACKEND_NONE = -1,
 #if LV_USE_LINUX_FBDEV
     BBX_BACKENDS_BACKEND_FBDEV,
-#endif /* LV_USE_LINUX_FBDEV */
+#endif
 #if LV_USE_LINUX_DRM
     BBX_BACKENDS_BACKEND_DRM,
-#endif /* LV_USE_LINUX_DRM */
+#endif
 } bbx_backends_backend_id_t;
 
-/**
- * Actual backends
- */
-extern const char *bbx_backends_backends[];
-
 /**
  * Find the first backend with a given name.
  *
diff --git a/unl0kr/config.c b/unl0kr/config.c
index 12a9390..a17c91d 100644
--- a/unl0kr/config.c
+++ b/unl0kr/config.c
@@ -139,7 +139,7 @@ static int parsing_handler(void* user_data, const char* section, const char* key
 
 void ul_config_init_opts(ul_config_opts *opts) {
     opts->general.animations = false;
-    opts->general.backend = bbx_backends_backends[0] == NULL ? BBX_BACKENDS_BACKEND_NONE : 0;
+    opts->general.backend = 0;
     opts->general.timeout = 0;
     opts->keyboard.autohide = true;
     opts->keyboard.layout_id = SQ2LV_LAYOUT_US;