Try to fix GUI-related issues in Linux

bin/vybe_raylib.c

@@ -6,4 +6,70 @@
   #define RAYGUI_IMPLEMENTATION TRUE
 #endif
 
+// To prevent undefined symbol on Linux when loading raygui functions, we
+// provide the text-related functions shown at
+// https://github.com/raysan5/raygui/blob/54bff64d7dbaefea877b0b2e32323761fc5692f2/examples/standalone/raygui_custom_backend.h#L139
+#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
+
+#elif __APPLE__
+
+#else
+//-------------------------------------------------------------------------------
+// Text required functions
+//-------------------------------------------------------------------------------
+// USED IN: GuiLoadStyleDefault()
+static Font GetFontDefault(void)
+{
+    Font font = { 0 };
+
+    // TODO: Return default rendering Font for the UI
+
+    return font;
+}
+
+// USED IN: GetTextWidth()
+static Vector2 MeasureTextEx(Font font, const char *text, float fontSize, float spacing)
+{
+    Vector2 size = { 0 };
+
+    // TODO: Return text size (width, height) on screen depending on the Font, text, fontSize and spacing
+
+    return size;
+}
+
+// USED IN: GuiDrawText()
+static void DrawTextEx(Font font, const char *text, Vector2 position, float fontSize, float spacing, Color tint)
+{
+    // TODO: Draw text on the screen
+}
+
+//-------------------------------------------------------------------------------
+// GuiLoadStyle() required functions
+//-------------------------------------------------------------------------------
+static Font LoadFontEx(const char *fileName, int fontSize, int *fontChars, int glyphCount)
+{
+    Font font = { 0 };
+
+    // TODO: Load a new font from a file
+
+    return font;
+}
+
+static char *LoadText(const char *fileName)
+{
+    // TODO: Load text file data, used by GuiLoadStyle() to load characters list required on Font generation,
+    // this is a .rgs feature, probably this function is not required in most cases
+
+    return NULL;
+}
+
+static const char *GetDirectoryPath(const char *filePath)
+{
+    // TODO: Get directory path for .rgs file, required to look for a possible .ttf/.otf font file referenced,
+    // this is a .rgs feature, probably this function is not required in most cases
+
+    return NULL;
+}
+#endif
+
 #include "../raygui/src/raygui.h"

todo.md

@@ -272,6 +272,8 @@
     - [x] macro to quickly evaluate stuff
     - [-] REPL plugin like portal does for cljs?
 - [ ] https://github.com/pfeodrippe/vybe/issues/4
+  - [ ] check if we can call
+  - [ ] no gui for linux
 - [ ] try to VybeC animation-node-player
   - [x] don't use `-field` for non components
   - [ ] make vector destructuring work