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build: fix and improve FreeRTOS build system configuration #110

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d2cfcc8
build: add FREERTOS_HEAP option and simplify FreeRTOS sources
yonghauhe Feb 18, 2026
5ab4d27
build: make FREERTOS support configurable via build system
yonghauhe Feb 18, 2026
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12 changes: 3 additions & 9 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ project(lvgl C CXX)

# Set the correct FreeRTOS port for your system (e.g., Posix for WSL)
set(FREERTOS_PORT GCC_POSIX CACHE STRING "Port for FreeRTOS on Posix environment")
set(FREERTOS_HEAP "4" CACHE STRING "FreeRTOS heap implementation (1-5)")

set(LVGL_PRO_PROJECT_DIR
""
Expand All @@ -17,6 +18,7 @@ if(USE_FREERTOS)
add_library(freertos_config INTERFACE)
target_include_directories(freertos_config SYSTEM INTERFACE ${PROJECT_SOURCE_DIR}/config)
target_compile_definitions(freertos_config INTERFACE projCOVERAGE_TEST=0)
add_compile_definitions(LV_USE_OS=LV_OS_FREERTOS)

# Add FreeRTOS as a subdirectory
add_subdirectory(FreeRTOS)
Expand All @@ -25,16 +27,8 @@ if(USE_FREERTOS)
include_directories(${PROJECT_SOURCE_DIR}/FreeRTOS/include)
include_directories(${PROJECT_SOURCE_DIR}/FreeRTOS/portable/ThirdParty/GCC/Posix)
include_directories(${PROJECT_SOURCE_DIR}/config)

# Add FreeRTOS sources
file(GLOB FREERTOS_SOURCES
"${PROJECT_SOURCE_DIR}/FreeRTOS/*.c"
"${PROJECT_SOURCE_DIR}/FreeRTOS/portable/MemMang/heap_4.c"
"${PROJECT_SOURCE_DIR}/FreeRTOS/portable/ThirdParty/GCC/Posix/*.c"
)
else()
message(STATUS "FreeRTOS is disabled")
set(FREERTOS_SOURCES "") # No FreeRTOS sources if FreeRTOS is disabled
endif()

# Main include files of the project
Expand Down Expand Up @@ -74,7 +68,7 @@ set(MAIN_LIBS lvgl lvgl::examples lvgl::demos lvgl::thorvg ${SDL2_LIBRARIES})

# Create the main executable, depending on the FreeRTOS option
if(USE_FREERTOS)
list(APPEND MAIN_SOURCES src/freertos_main.c src/freertos/freertos_posix_port.c ${FREERTOS_SOURCES})
list(APPEND MAIN_SOURCES src/freertos_main.c src/freertos/freertos_posix_port.c)
list(APPEND MAIN_LIBS freertos_config freertos_kernel)
else()
list(APPEND MAIN_SOURCES src/main.c)
Expand Down
4 changes: 3 additions & 1 deletion lv_conf.h
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Expand Up @@ -106,7 +106,9 @@
* - LV_OS_MQX
* - LV_OS_SDL2
* - LV_OS_CUSTOM */
#define LV_USE_OS LV_OS_NONE
#ifndef LV_USE_OS
#define LV_USE_OS LV_OS_NONE
#endif

#if LV_USE_OS == LV_OS_CUSTOM
#define LV_OS_CUSTOM_INCLUDE <stdint.h>
Expand Down