Fix oled-ssd1306 tag + esp32 build

Author: julianneswinoga

platformio.ini

@@ -13,7 +13,7 @@ lib_deps =
 	arduino-libraries/LiquidCrystal @ ^1.0.7
 	lincomatic/LiquidTWI2@^1.2.7
 	olikraus/U8g2@^2.28.8
-	https://github.com/ClutchplateDude/esp8266-oled-ssd1306#4.6.0
+	https://github.com/ClutchplateDude/esp8266-oled-ssd1306#4.6.2
 
 [env]
 extra_scripts =

src/SSD1306_128x64_Display.hpp

@@ -6,6 +6,17 @@
 #include "Mount.hpp"
 #include "InfoDisplayRender.hpp"
 
+#if defined(ESP32)
+    /*
+     * ESP32 PROGMEM is fake, and its pgm_read_byte macro makes a useless cast
+     * which errors out with Werror=useless-cast, which can't be suppressed by
+     * our PUSH/POP_NO_WARNINGS because the macro expands in OUR code, not their
+     * header :/
+     */
+    #undef pgm_read_byte
+    #define pgm_read_byte(addr) (*(addr))
+#endif
+
 const float sineSize              = 18.0;
 const uint8_t sineTable[] PROGMEM = {0, 22, 44, 66, 87, 108, 128, 146, 164, 180, 195, 209, 221, 231, 240, 246, 251, 254, 255, 255};