Precompiling lvgl drastically reduces library compile time.

.github/workflows/compile-examples.yml

@@ -50,7 +50,6 @@ jobs:
           libraries: |
             # Install the library from the local path.
             - source-path: ./
-            - name: lvgl
             # Additional library dependencies can be listed here.
             # See: https://github.com/arduino/compile-sketches#libraries
           sketch-paths: |

.gitignore

@@ -0,0 +1 @@
+extras/build

README.md

@@ -15,6 +15,16 @@ This library allows you to control and interact with the 6 DOF Braccio++ robot a
 * [Help Center](https://support.arduino.cc/)
 * [Forum](https://forum.arduino.cc)
 
+### How-to-update precompiled `liblvgl`
+```bash
+git clone https://github.com/lvgl/lvgl
+git clone https://github.com/arduino-libraries/Arduino_Braccio_plusplus
+cd Arduino_Braccio_plusplus/extras
+mkdir build && cd build
+cmake -DCMAKE_BUILD_TYPE=Release ..
+make -j8
+```
+
 ## :bug: Bugs & Issues
 
 If you want to report an issue with this library, you can submit it to the [issue tracker](https://github.com/arduino-libraries/Arduino_Braccio_plusplus/issues) of this repository. Remember to include as much detail as you can about your hardware set-up, code and steps for reproducing the issue. Make sure you're using an original Arduino board.

extras/CMakeLists.txt

@@ -0,0 +1,27 @@
+##########################################################################
+cmake_minimum_required(VERSION 3.16)
+##########################################################################
+project(lvgl)
+##########################################################################
+set(CMAKE_C_COMPILER arm-none-eabi-gcc)
+set(CMAKE_CXX_COMPILER arm-none-eabi-g++)
+##########################################################################
+add_library(${PROJECT_NAME} STATIC "")
+##########################################################################
+set(LVGL_ROOT_DIR ${CMAKE_SOURCE_DIR}/../../lvgl)
+set(LV_CONF_DIR ${CMAKE_SOURCE_DIR}/../src)
+##########################################################################
+target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC ${LVGL_ROOT_DIR} ${LV_CONF_DIR})
+##########################################################################
+file(GLOB_RECURSE LVGL_SOURCES ${LVGL_ROOT_DIR}/src/*.c)
+target_sources(${PROJECT_NAME} PUBLIC ${LVGL_SOURCES})
+##########################################################################
+target_compile_options(${PROJECT_NAME} PRIVATE -mcpu=cortex-m0plus -fPIC)
+##########################################################################
+file(WRITE ${CMAKE_BINARY_DIR}/cp-lvgl-hdr.cmake
+  "file(COPY ${LVGL_ROOT_DIR}/src DESTINATION ../../src/lib/lvgl FILES_MATCHING PATTERN *.h)\n"
+)
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD COMMAND cp ${CMAKE_BINARY_DIR}/liblvgl.a ../../src/cortex-m0plus/liblvgl.a COMMENT "Copying libvgl.a")
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD COMMAND cp ${LVGL_ROOT_DIR}/lvgl.h ../../src/lib/lvgl  COMMENT "Copying lvgl.h")
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD COMMAND ${CMAKE_COMMAND} -P ${CMAKE_BINARY_DIR}/cp-lvgl-hdr.cmake COMMENT "Copying lvgl/src/*.h")
+##########################################################################

library.properties

@@ -7,5 +7,6 @@ paragraph=This library allows you to control the Arduino Braccio++ 6-DOF 2nd gen
 category=Communication
 url=https://github.com/arduino-libraries/Arduino_Braccio_plusplus
 architectures=mbed,mbed_nano
+precompiled=true
+ldflags=-llvgl
 includes=Braccio++.h
-depends=lvgl

src/Braccio++.h

@@ -33,7 +33,7 @@
 #include "drivers/Ticker.h"
 
 #include "lib/TFT_eSPI/TFT_eSPI.h" // Hardware-specific library
-#include <lvgl.h>
+#include "lib/lvgl/lvgl.h"
 
 #include <chrono>
 using namespace std::chrono;

src/gif.c

@@ -18,7 +18,7 @@
  * USA.
  */
 
-#include <lvgl.h>
+#include "lib/lvgl/lvgl.h"
 
 #ifndef LV_ATTRIBUTE_MEM_ALIGN
 #define LV_ATTRIBUTE_MEM_ALIGN

src/lib/lvgl/lvgl.h

@@ -0,0 +1,138 @@
+/**
+ * @file lvgl.h
+ * Include all LVGL related headers
+ */
+
+#ifndef LVGL_H
+#define LVGL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/***************************
+ * CURRENT VERSION OF LVGL
+ ***************************/
+#define LVGL_VERSION_MAJOR 8
+#define LVGL_VERSION_MINOR 3
+#define LVGL_VERSION_PATCH 0
+#define LVGL_VERSION_INFO "dev"
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+#include "src/misc/lv_log.h"
+#include "src/misc/lv_timer.h"
+#include "src/misc/lv_math.h"
+#include "src/misc/lv_mem.h"
+#include "src/misc/lv_async.h"
+#include "src/misc/lv_anim_timeline.h"
+#include "src/misc/lv_printf.h"
+
+#include "src/hal/lv_hal.h"
+
+#include "src/core/lv_obj.h"
+#include "src/core/lv_group.h"
+#include "src/core/lv_indev.h"
+#include "src/core/lv_refr.h"
+#include "src/core/lv_disp.h"
+#include "src/core/lv_theme.h"
+
+#include "src/font/lv_font.h"
+#include "src/font/lv_font_loader.h"
+#include "src/font/lv_font_fmt_txt.h"
+
+#include "src/widgets/lv_arc.h"
+#include "src/widgets/lv_btn.h"
+#include "src/widgets/lv_img.h"
+#include "src/widgets/lv_label.h"
+#include "src/widgets/lv_line.h"
+#include "src/widgets/lv_table.h"
+#include "src/widgets/lv_checkbox.h"
+#include "src/widgets/lv_bar.h"
+#include "src/widgets/lv_slider.h"
+#include "src/widgets/lv_btnmatrix.h"
+#include "src/widgets/lv_dropdown.h"
+#include "src/widgets/lv_roller.h"
+#include "src/widgets/lv_textarea.h"
+#include "src/widgets/lv_canvas.h"
+#include "src/widgets/lv_switch.h"
+
+#include "src/draw/lv_draw.h"
+
+#include "src/lv_api_map.h"
+
+/*-----------------
+ * EXTRAS
+ *----------------*/
+#include "src/extra/lv_extra.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+/** Gives 1 if the x.y.z version is supported in the current version
+ * Usage:
+ *
+ * - Require v6
+ * #if LV_VERSION_CHECK(6,0,0)
+ *   new_func_in_v6();
+ * #endif
+ *
+ *
+ * - Require at least v5.3
+ * #if LV_VERSION_CHECK(5,3,0)
+ *   new_feature_from_v5_3();
+ * #endif
+ *
+ *
+ * - Require v5.3.2 bugfixes
+ * #if LV_VERSION_CHECK(5,3,2)
+ *   bugfix_in_v5_3_2();
+ * #endif
+ *
+ */
+#define LV_VERSION_CHECK(x,y,z) (x == LVGL_VERSION_MAJOR && (y < LVGL_VERSION_MINOR || (y == LVGL_VERSION_MINOR && z <= LVGL_VERSION_PATCH)))
+
+/**
+ * Wrapper functions for VERSION macros
+ */
+
+static inline int lv_version_major(void)
+{
+    return LVGL_VERSION_MAJOR;
+}
+
+static inline int lv_version_minor(void)
+{
+    return LVGL_VERSION_MINOR;
+}
+
+static inline int lv_version_patch(void)
+{
+    return LVGL_VERSION_PATCH;
+}
+
+static inline const char *lv_version_info(void)
+{
+    return LVGL_VERSION_INFO;
+}
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LVGL_H*/