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Adding CMake file for building pre-compiled libvgl.
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extras/CMakeLists.txt

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

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