reduce initial build time

DEVELOPMENT.md

@@ -361,6 +361,17 @@ The application uses a JSON configuration file stored at `/userdata/kvm_config.j
 3. **Add migration logic if needed for existing installations**
 
 
+### LVGL Build
+
+We modified the LVGL code a little bit to remove unused fonts and examples.
+The patches are generated by
+
+```bash
+git diff --cached --diff-filter=d > ../internal/native/cgo/lvgl-minify.patch && \
+git diff --name-only --diff-filter=d --cached > ../internal/native/cgo/lvgl-minify.del
+```
+
+
 ---
 
 **Happy coding!**

internal/native/cgo/CMakeLists.txt

@@ -35,6 +35,7 @@ FetchContent_Declare(
     GIT_TAG v9.3.0
     GIT_SHALLOW 1
     UPDATE_DISCONNECTED 1
+    PATCH_COMMAND patch -p1 -f < ${CMAKE_CURRENT_SOURCE_DIR}/lvgl-minify.patch && cat ${CMAKE_CURRENT_SOURCE_DIR}/lvgl-minify.del | xargs rm -v
     )
 FetchContent_MakeAvailable(lvgl)
 

internal/native/cgo/lvgl-minify.patch

@@ -0,0 +1,251 @@
+diff --git a/env_support/cmake/os_desktop.cmake b/env_support/cmake/os_desktop.cmake
+index 5c6b05ed8..a18044d64 100644
+--- a/env_support/cmake/os_desktop.cmake
++++ b/env_support/cmake/os_desktop.cmake
+@@ -60,8 +60,6 @@ get_directory_property(HAS_PARENT_SCOPE PARENT_DIRECTORY)
+ # Set sources used for LVGL components
+ file(GLOB_RECURSE SOURCES ${LVGL_ROOT_DIR}/src/*.c
+                           ${LVGL_ROOT_DIR}/src/*.S)
+-file(GLOB_RECURSE EXAMPLE_SOURCES ${LVGL_ROOT_DIR}/examples/*.c)
+-file(GLOB_RECURSE DEMO_SOURCES ${LVGL_ROOT_DIR}/demos/*.c)
+ file(GLOB_RECURSE THORVG_SOURCES ${LVGL_ROOT_DIR}/src/libs/thorvg/*.cpp
+                                  ${LVGL_ROOT_DIR}/src/others/vg_lite_tvg/*.cpp)
+ 
+@@ -229,51 +227,6 @@ if(NOT (CMAKE_C_COMPILER_ID STREQUAL "MSVC"))
+         PROPERTIES COMPILE_FLAGS -Wunused-parameter)
+ endif()
+ 
+-# Build LVGL example library
+-if(CONFIG_LV_BUILD_EXAMPLES)
+-
+-    message(STATUS "Enabling the building of examples")
+-
+-    add_library(lvgl_examples ${EXAMPLE_SOURCES})
+-    add_library(lvgl::examples ALIAS lvgl_examples)
+-    target_include_directories(lvgl_examples SYSTEM PUBLIC ${LVGL_ROOT_DIR}/examples)
+-    set_target_properties(lvgl_examples PROPERTIES COMPILE_DEFINITIONS "${COMP_DEF}")
+-
+-    # This tells cmake to link lvgl with lvgl_examples
+-    # PUBLIC allows code linking with LVGL to also use the library
+-    # The linker will resolve all dependencies when dynamic linking 
+-    target_link_libraries(lvgl PUBLIC lvgl_examples)
+-
+-    # During static linking, we need to create a cyclic dependency as the examples also needs lvgl
+-    if (NOT BUILD_SHARED_LIBS)
+-        target_link_libraries(lvgl_examples PRIVATE lvgl)
+-    endif()
+-
+-endif()
+-
+-# Build LVGL demos library
+-if(CONFIG_LV_BUILD_DEMOS)
+-
+-    message(STATUS "Enabling the building of demos")
+-
+-    add_library(lvgl_demos ${DEMO_SOURCES})
+-    add_library(lvgl::demos ALIAS lvgl_demos)
+-    target_include_directories(lvgl_demos SYSTEM PUBLIC ${LVGL_ROOT_DIR}/demos)
+-    set_target_properties(lvgl_demos PROPERTIES COMPILE_DEFINITIONS "${COMP_DEF}")
+-
+-    # This tells cmake to link lvgl with lvgl_examples
+-    # PUBLIC allows code linking with LVGL to also use the library
+-    # The linker will resolve all dependencies when dynamic linking 
+-    target_link_libraries(lvgl PUBLIC lvgl_demos)
+-
+-    # During static linking, we need to create a cyclic dependency as the demos also needs lvgl
+-    if (NOT BUILD_SHARED_LIBS)
+-        # If static linking - demos depends on fonts defined in lvgl
+-        # During dynamic linking, the linker is able to resolve everything
+-        target_link_libraries(lvgl_demos PRIVATE lvgl)
+-    endif()
+-
+-endif()
+ 
+ ############################## INSTALLATION ######################################
+ 
+@@ -373,58 +326,6 @@ if(CONFIG_LV_USE_THORVG_INTERNAL)
+ 
+ endif()
+ 
+-if(CONFIG_LV_BUILD_DEMOS)
+-
+-    install(
+-        DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/demos"
+-        DESTINATION "${INC_INSTALL_DIR}"
+-        FILES_MATCHING
+-        PATTERN "*.h")
+-
+-    set_target_properties(
+-        lvgl_demos
+-        PROPERTIES OUTPUT_NAME lvgl_demos
+-        VERSION ${LVGL_VERSION}
+-        SOVERSION ${LVGL_SOVERSION}
+-        ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/lib"
+-        LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/lib"
+-        PUBLIC_HEADER "${LVGL_PUBLIC_HEADERS}")
+-
+-    install(
+-        TARGETS lvgl_demos
+-        ARCHIVE DESTINATION "${LIB_INSTALL_DIR}"
+-        LIBRARY DESTINATION "${LIB_INSTALL_DIR}"
+-        RUNTIME DESTINATION "${RUNTIME_INSTALL_DIR}"
+-        PUBLIC_HEADER DESTINATION "${INC_INSTALL_DIR}")
+-
+-endif()
+-
+-if(CONFIG_LV_BUILD_EXAMPLES)
+-
+-    install(
+-        DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/examples"
+-        DESTINATION "${INC_INSTALL_DIR}"
+-        FILES_MATCHING
+-        PATTERN "*.h")
+-
+-    set_target_properties(
+-        lvgl_examples
+-        PROPERTIES OUTPUT_NAME lvgl_examples
+-        VERSION ${LVGL_VERSION}
+-        SOVERSION ${LVGL_SOVERSION}
+-        ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/lib"
+-        LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/lib"
+-        PUBLIC_HEADER "${LVGL_PUBLIC_HEADERS}")
+-
+-    install(
+-        TARGETS lvgl_examples
+-        ARCHIVE DESTINATION "${LIB_INSTALL_DIR}"
+-        LIBRARY DESTINATION "${LIB_INSTALL_DIR}"
+-        RUNTIME DESTINATION "${RUNTIME_INSTALL_DIR}"
+-        PUBLIC_HEADER DESTINATION "${INC_INSTALL_DIR}")
+-
+-endif()
+-
+ ############################## SET GLOBAL VARIABLES ######################################
+ 
+ if (HAS_PARENT_SCOPE)
+diff --git a/src/font/lv_font.h b/src/font/lv_font.h
+index 180891832..b66c30eaa 100644
+--- a/src/font/lv_font.h
++++ b/src/font/lv_font.h
+@@ -230,122 +230,10 @@ bool lv_font_has_static_bitmap(const lv_font_t * font);
+ 
+ #define LV_FONT_DECLARE(font_name) LV_ATTRIBUTE_EXTERN_DATA extern const lv_font_t font_name;
+ 
+-#if LV_FONT_MONTSERRAT_8
+-LV_FONT_DECLARE(lv_font_montserrat_8)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_10
+-LV_FONT_DECLARE(lv_font_montserrat_10)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_12
+-LV_FONT_DECLARE(lv_font_montserrat_12)
+-#endif
+-
+ #if LV_FONT_MONTSERRAT_14
+ LV_FONT_DECLARE(lv_font_montserrat_14)
+ #endif
+ 
+-#if LV_FONT_MONTSERRAT_16
+-LV_FONT_DECLARE(lv_font_montserrat_16)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_18
+-LV_FONT_DECLARE(lv_font_montserrat_18)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_20
+-LV_FONT_DECLARE(lv_font_montserrat_20)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_22
+-LV_FONT_DECLARE(lv_font_montserrat_22)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_24
+-LV_FONT_DECLARE(lv_font_montserrat_24)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_26
+-LV_FONT_DECLARE(lv_font_montserrat_26)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_28
+-LV_FONT_DECLARE(lv_font_montserrat_28)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_30
+-LV_FONT_DECLARE(lv_font_montserrat_30)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_32
+-LV_FONT_DECLARE(lv_font_montserrat_32)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_34
+-LV_FONT_DECLARE(lv_font_montserrat_34)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_36
+-LV_FONT_DECLARE(lv_font_montserrat_36)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_38
+-LV_FONT_DECLARE(lv_font_montserrat_38)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_40
+-LV_FONT_DECLARE(lv_font_montserrat_40)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_42
+-LV_FONT_DECLARE(lv_font_montserrat_42)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_44
+-LV_FONT_DECLARE(lv_font_montserrat_44)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_46
+-LV_FONT_DECLARE(lv_font_montserrat_46)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_48
+-LV_FONT_DECLARE(lv_font_montserrat_48)
+-#endif
+-
+-#if LV_FONT_MONTSERRAT_28_COMPRESSED
+-LV_FONT_DECLARE(lv_font_montserrat_28_compressed)
+-#endif
+-
+-#if LV_FONT_DEJAVU_16_PERSIAN_HEBREW
+-LV_FONT_DECLARE(lv_font_dejavu_16_persian_hebrew)
+-#endif
+-
+-#if LV_FONT_SIMSUN_14_CJK
+-LV_FONT_DECLARE(lv_font_simsun_14_cjk)
+-#endif
+-
+-#if LV_FONT_SIMSUN_16_CJK
+-LV_FONT_DECLARE(lv_font_simsun_16_cjk)
+-#endif
+-
+-#if LV_FONT_SOURCE_HAN_SANS_SC_14_CJK
+-LV_FONT_DECLARE(lv_font_source_han_sans_sc_14_cjk)
+-#endif
+-
+-#if LV_FONT_SOURCE_HAN_SANS_SC_16_CJK
+-LV_FONT_DECLARE(lv_font_source_han_sans_sc_16_cjk)
+-#endif
+-
+-#if LV_FONT_UNSCII_8
+-LV_FONT_DECLARE(lv_font_unscii_8)
+-#endif
+-
+-#if LV_FONT_UNSCII_16
+-LV_FONT_DECLARE(lv_font_unscii_16)
+-#endif
+-
+ /*Declare the custom (user defined) fonts*/
+ #ifdef LV_FONT_CUSTOM_DECLARE
+ LV_FONT_CUSTOM_DECLARE

internal/native/cgo/lvgl-no-examples.patch

@@ -1,207 +0,0 @@
-diff --git a/env_support/cmake/custom.cmake b/env_support/cmake/custom.cmake
-index 7da68124b..1fbe2d3de 100644
---- a/env_support/cmake/custom.cmake
-+++ b/env_support/cmake/custom.cmake
-@@ -15,8 +15,6 @@ get_filename_component(LV_CONF_DIR ${LV_CONF_PATH} DIRECTORY)
- option(BUILD_SHARED_LIBS "Build shared libraries" OFF)
- 
- file(GLOB_RECURSE SOURCES ${LVGL_ROOT_DIR}/src/*.c)
--file(GLOB_RECURSE EXAMPLE_SOURCES ${LVGL_ROOT_DIR}/examples/*.c)
--file(GLOB_RECURSE DEMO_SOURCES ${LVGL_ROOT_DIR}/demos/*.c)
- 
- if (BUILD_SHARED_LIBS)
-   add_library(lvgl SHARED ${SOURCES})
-@@ -25,10 +23,6 @@ else()
- endif()
- 
- add_library(lvgl::lvgl ALIAS lvgl)
--add_library(lvgl_examples STATIC ${EXAMPLE_SOURCES})
--add_library(lvgl::examples ALIAS lvgl_examples)
--add_library(lvgl_demos STATIC ${DEMO_SOURCES})
--add_library(lvgl::demos ALIAS lvgl_demos)
- 
- target_compile_definitions(
-   lvgl PUBLIC $<$<BOOL:${LV_LVGL_H_INCLUDE_SIMPLE}>:LV_LVGL_H_INCLUDE_SIMPLE>
-@@ -37,15 +31,6 @@ target_compile_definitions(
- # Include root and optional parent path of LV_CONF_PATH
- target_include_directories(lvgl SYSTEM PUBLIC ${LVGL_ROOT_DIR} ${LV_CONF_DIR})
- 
--# Include /examples folder
--target_include_directories(lvgl_examples SYSTEM
--                           PUBLIC ${LVGL_ROOT_DIR}/examples)
--target_include_directories(lvgl_demos SYSTEM
--                           PUBLIC ${LVGL_ROOT_DIR}/demos)
--
--target_link_libraries(lvgl_examples PUBLIC lvgl)
--target_link_libraries(lvgl_demos PUBLIC lvgl)
--
- # Lbrary and headers can be installed to system using make install
- file(GLOB LVGL_PUBLIC_HEADERS "${CMAKE_SOURCE_DIR}/lv_conf.h"
-      "${CMAKE_SOURCE_DIR}/lvgl.h")
-diff --git a/lvgl.mk b/lvgl.mk
-index 0ea126daa..300fb6cbe 100644
---- a/lvgl.mk
-+++ b/lvgl.mk
-@@ -1,5 +1,3 @@
--include $(LVGL_DIR)/$(LVGL_DIR_NAME)/demos/lv_demos.mk
--include $(LVGL_DIR)/$(LVGL_DIR_NAME)/examples/lv_examples.mk
- include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/core/lv_core.mk
- include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/draw/lv_draw.mk
- include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/extra/lv_extra.mk
-diff --git a/src/font/lv_font.h b/src/font/lv_font.h
-index e3b670c87..4cceffc45 100644
---- a/src/font/lv_font.h
-+++ b/src/font/lv_font.h
-@@ -132,114 +132,10 @@ static inline lv_coord_t lv_font_get_line_height(const lv_font_t * font_p)
- 
- #define LV_FONT_DECLARE(font_name) extern const lv_font_t font_name;
- 
--#if LV_FONT_MONTSERRAT_8
--LV_FONT_DECLARE(lv_font_montserrat_8)
--#endif
--
--#if LV_FONT_MONTSERRAT_10
--LV_FONT_DECLARE(lv_font_montserrat_10)
--#endif
--
--#if LV_FONT_MONTSERRAT_12
--LV_FONT_DECLARE(lv_font_montserrat_12)
--#endif
--
- #if LV_FONT_MONTSERRAT_14
- LV_FONT_DECLARE(lv_font_montserrat_14)
- #endif
- 
--#if LV_FONT_MONTSERRAT_16
--LV_FONT_DECLARE(lv_font_montserrat_16)
--#endif
--
--#if LV_FONT_MONTSERRAT_18
--LV_FONT_DECLARE(lv_font_montserrat_18)
--#endif
--
--#if LV_FONT_MONTSERRAT_20
--LV_FONT_DECLARE(lv_font_montserrat_20)
--#endif
--
--#if LV_FONT_MONTSERRAT_22
--LV_FONT_DECLARE(lv_font_montserrat_22)
--#endif
--
--#if LV_FONT_MONTSERRAT_24
--LV_FONT_DECLARE(lv_font_montserrat_24)
--#endif
--
--#if LV_FONT_MONTSERRAT_26
--LV_FONT_DECLARE(lv_font_montserrat_26)
--#endif
--
--#if LV_FONT_MONTSERRAT_28
--LV_FONT_DECLARE(lv_font_montserrat_28)
--#endif
--
--#if LV_FONT_MONTSERRAT_30
--LV_FONT_DECLARE(lv_font_montserrat_30)
--#endif
--
--#if LV_FONT_MONTSERRAT_32
--LV_FONT_DECLARE(lv_font_montserrat_32)
--#endif
--
--#if LV_FONT_MONTSERRAT_34
--LV_FONT_DECLARE(lv_font_montserrat_34)
--#endif
--
--#if LV_FONT_MONTSERRAT_36
--LV_FONT_DECLARE(lv_font_montserrat_36)
--#endif
--
--#if LV_FONT_MONTSERRAT_38
--LV_FONT_DECLARE(lv_font_montserrat_38)
--#endif
--
--#if LV_FONT_MONTSERRAT_40
--LV_FONT_DECLARE(lv_font_montserrat_40)
--#endif
--
--#if LV_FONT_MONTSERRAT_42
--LV_FONT_DECLARE(lv_font_montserrat_42)
--#endif
--
--#if LV_FONT_MONTSERRAT_44
--LV_FONT_DECLARE(lv_font_montserrat_44)
--#endif
--
--#if LV_FONT_MONTSERRAT_46
--LV_FONT_DECLARE(lv_font_montserrat_46)
--#endif
--
--#if LV_FONT_MONTSERRAT_48
--LV_FONT_DECLARE(lv_font_montserrat_48)
--#endif
--
--#if LV_FONT_MONTSERRAT_12_SUBPX
--LV_FONT_DECLARE(lv_font_montserrat_12_subpx)
--#endif
--
--#if LV_FONT_MONTSERRAT_28_COMPRESSED
--LV_FONT_DECLARE(lv_font_montserrat_28_compressed)
--#endif
--
--#if LV_FONT_DEJAVU_16_PERSIAN_HEBREW
--LV_FONT_DECLARE(lv_font_dejavu_16_persian_hebrew)
--#endif
--
--#if LV_FONT_SIMSUN_16_CJK
--LV_FONT_DECLARE(lv_font_simsun_16_cjk)
--#endif
--
--#if LV_FONT_UNSCII_8
--LV_FONT_DECLARE(lv_font_unscii_8)
--#endif
--
--#if LV_FONT_UNSCII_16
--LV_FONT_DECLARE(lv_font_unscii_16)
--#endif
--
- /*Declare the custom (user defined) fonts*/
- #ifdef LV_FONT_CUSTOM_DECLARE
- LV_FONT_CUSTOM_DECLARE
-diff --git a/src/font/lv_font.mk b/src/font/lv_font.mk
-index 2201b73f2..7b2707da4 100644
---- a/src/font/lv_font.mk
-+++ b/src/font/lv_font.mk
-@@ -2,33 +2,7 @@ CSRCS += lv_font.c
- CSRCS += lv_font_fmt_txt.c
- CSRCS += lv_font_loader.c
- 
--CSRCS += lv_font_dejavu_16_persian_hebrew.c
--CSRCS += lv_font_montserrat_8.c
--CSRCS += lv_font_montserrat_10.c
--CSRCS += lv_font_montserrat_12.c
--CSRCS += lv_font_montserrat_12_subpx.c
- CSRCS += lv_font_montserrat_14.c
--CSRCS += lv_font_montserrat_16.c
--CSRCS += lv_font_montserrat_18.c
--CSRCS += lv_font_montserrat_20.c
--CSRCS += lv_font_montserrat_22.c
--CSRCS += lv_font_montserrat_24.c
--CSRCS += lv_font_montserrat_26.c
--CSRCS += lv_font_montserrat_28.c
--CSRCS += lv_font_montserrat_28_compressed.c
--CSRCS += lv_font_montserrat_30.c
--CSRCS += lv_font_montserrat_32.c
--CSRCS += lv_font_montserrat_34.c
--CSRCS += lv_font_montserrat_36.c
--CSRCS += lv_font_montserrat_38.c
--CSRCS += lv_font_montserrat_40.c
--CSRCS += lv_font_montserrat_42.c
--CSRCS += lv_font_montserrat_44.c
--CSRCS += lv_font_montserrat_46.c
--CSRCS += lv_font_montserrat_48.c
--CSRCS += lv_font_simsun_16_cjk.c
--CSRCS += lv_font_unscii_8.c
--CSRCS += lv_font_unscii_16.c
- 
- DEPPATH += --dep-path $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/font
- VPATH += :$(LVGL_DIR)/$(LVGL_DIR_NAME)/src/font