QGCS error for Android

[InsideFPV]

FAILED: Release/libQGroundControl_arm64-v8a.so
C:\Windows\system32\cmd.exe /C "cd . && C:\Users\Software\AppData\Local\Android\Sdk\ndk\26.1.10909125\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe --target=aarch64-none-linux-android23 --sysroot=C:/Users/Software/AppData/Local/Android/Sdk/ndk/26.1.10909125/toolchains/llvm/prebuilt/windows-x86_64/sysroot -fPIC -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security -fexceptions -frtti -stdlib=libc++ -O3 -DNDEBUG -Wl,--build-id=sha1 -Wl,--no-rosegment -Wl,--no-undefined-version -Wl,--fatal-warnings -Wl,--gc-sections -Qunused-arguments -Wl,--no-undefined -Wl,-Bsymbolic -shared -o Release\libQGroundControl_arm64-v8a.so @CMakeFiles\QGroundControl.rsp && cd ."
ld.lld: error: unable to find library -lpng
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
10:44:07: The process "C:\Program Files\CMake\bin\cmake.exe" exited with code 1.
10:44:07: Error while building/deploying project QGroundControl (kit: Android Qt 6.8.2 Clang arm64-v8a)
10:44:07: When executing step "Build"
10:44:07: Elapsed time: 08:59.

I have the error when I am build the project for android please if any have solutions please ping me.

[jsulm]

@InsideFPV said in QGCS error for Android:

ld.lld: error: unable to find library -lpng

Linker cannot find libpng library.
Do you link to libpng explicitly (in your CMakeLists.txt file)?

[InsideFPV]

@jsulm do we have to externally add and from where i can download this library , i am adding chatgpt solution but it will not resolve please give me solution if you have any idea for this like how to link..?

[jsulm]

@InsideFPV said in QGCS error for Android:

please give me solution

Please answer my question first: do you link to libpng explicitly (in your CMakeLists.txt file)?

[InsideFPV]

@jsulm No sir
I am adding full cmakelist.txt please check

cmake_minimum_required(VERSION 3.25)

list(APPEND CMAKE_MODULE_PATH
${CMAKE_SOURCE_DIR}/cmake
${CMAKE_SOURCE_DIR}/cmake/modules
${CMAKE_SOURCE_DIR}/cmake/find-modules
)

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type" FORCE)
set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug;Release")
endif()

set(CMAKE_REQUIRED_QUIET ON)

#######################################################

Custom Build Configuration

#######################################################

include(CustomOptions)

if(IS_DIRECTORY ${CMAKE_SOURCE_DIR}/custom)
message(STATUS "Enabling custom build")
set(QGC_CUSTOM_BUILD ON)
list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/custom/cmake)
include(CustomOverrides)
endif()

#######################################################

Project Info

#######################################################

set(CMAKE_OSX_ARCHITECTURES "arm64")

set(CMAKE_OSX_SYSROOT "iphoneos")

if(APPLE)
set(CMAKE_OSX_DEPLOYMENT_TARGET "12.0")
endif()

include(Git)

project(${QGC_APP_NAME}
VERSION ${QGC_APP_VERSION}
DESCRIPTION ${QGC_APP_DESCRIPTION}
HOMEPAGE_URL "https://qgroundcontrol.com/"
LANGUAGES C CXX
)

if(APPLE AND NOT IOS)
set(MACOS TRUE)
endif()

#######################################################

CMake Configuration Options

#######################################################

include(GNUInstallDirs)
include(FetchContent)
include(CMakePrintHelpers)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
if(LINUX)
set_property(CACHE CMAKE_INSTALL_PREFIX PROPERTY VALUE "${CMAKE_BINARY_DIR}/AppDir/usr")
else()
set_property(CACHE CMAKE_INSTALL_PREFIX PROPERTY VALUE "${CMAKE_BINARY_DIR}/staging")
endif()
endif()

if(QGC_USE_CACHE)
if(CMAKE_HOST_UNIX)
find_program(CCACHE_PROGRAM ccache)
if(CCACHE_PROGRAM)
message(STATUS "Using CCache")
set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE_PROGRAM})
set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_PROGRAM})
if(APPLE)
set(CMAKE_OBJC_COMPILER_LAUNCHER ${CCACHE_PROGRAM})
endif()
endif()
elseif(CMAKE_HOST_WIN32)
find_program(SCCACHE_PROGRAM sccache)
if(SCCACHE_PROGRAM)
message(STATUS "Using SCCache")
set(CMAKE_C_COMPILER_LAUNCHER ${SCCACHE_PROGRAM})
set(CMAKE_CXX_COMPILER_LAUNCHER ${SCCACHE_PROGRAM})
endif()
endif()
endif()

if(MSVC)
set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT Embedded)
endif()

if(CMAKE_CROSSCOMPILING AND ANDROID)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY BOTH)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH)
endif()

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/$<CONFIGURATION>/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/$<CONFIGURATION>)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/$<CONFIGURATION>)

https://cmake.org/cmake/help/latest/policy/CMP0168.html#policy:CMP0168

if(POLICY CMP0168)
cmake_policy(SET CMP0168 NEW)
set(CMAKE_POLICY_DEFAULT_CMP0168 NEW)
endif()

https://cmake.org/cmake/help/latest/policy/CMP0075.html#policy:CMP0075

if(POLICY CMP0075)
cmake_policy(SET CMP0075 NEW)
set(CMAKE_POLICY_DEFAULT_CMP0075 NEW)
endif()

if(QGC_USE_IWYU)
include(IWYU)
endif()

#######################################################

Qt6 Configuration

#######################################################

if(CMAKE_CROSSCOMPILING AND NOT IS_DIRECTORY ${QT_HOST_PATH})
message(FATAL_ERROR "You need to set QT_HOST_PATH to cross compile Qt.")
endif()

find_program(QMAKE_EXECUTABLE NAMES qmake HINTS ${QT_ROOT_DIR} ${QTDIR} ENV QTDIR PATH_SUFFIXES bin)
execute_process(COMMAND ${QMAKE_EXECUTABLE} -query QT_VERSION OUTPUT_VARIABLE QT_VERSION)
if(QT_VERSION LESS QT_MINIMUM_VERSION)
MESSAGE(FATAL_ERROR "Minimum supported Qt version: ${QT_MINIMUM_VERSION}.
Installed version: ${QT_VERSION}")
endif()

add_compile_definitions(QT_DISABLE_DEPRECATED_UP_TO=0x060800)

if(CMAKE_BUILD_TYPE STREQUAL "Release")
add_compile_definitions(
NDEBUG
QT_NO_DEBUG
QT_NO_DEBUG_OUTPUT
)
elseif(CMAKE_BUILD_TYPE STREQUAL "Debug")
include(CTest)
endif()

if(ANDROID)
list(APPEND QT_ANDROID_MULTI_ABI_FORWARD_VARS QGC_STABLE_BUILD QT_HOST_PATH)
endif()

find_package(Qt6
${QT_MINIMUM_VERSION}
REQUIRED
COMPONENTS
Concurrent
Core
Core5Compat
Location
Multimedia
Network
OpenGL
Positioning
Qml
QmlIntegration
Quick
QuickControls2
QuickWidgets
Sensors
Sql
Svg
TextToSpeech
Widgets
Xml
OPTIONAL_COMPONENTS
Bluetooth
Charts
LinguistTools
MultimediaQuickPrivate
Quick3D
Quick3DTools
SerialPort
Test
HINTS
${QT_LIBRARY_HINTS}
)

if(LINUX)
find_package(Qt6 ${QT_MINIMUM_VERSION} COMPONENTS WaylandClient)
endif()

Set extra standard project setup options for Qt 6.7.0 and above

set(EXTRA_STANDARD_PROJECT_SETUP_OPTIONS)
if(QT_VERSION VERSION_GREATER_EQUAL 6.8.2)
list(APPEND EXTRA_STANDARD_PROJECT_SETUP_OPTIONS I18N_SOURCE_LANGUAGE en)
endif()

qt_standard_project_setup(
REQUIRES ${QGC_QT_MINIMUM_VERSION}
SUPPORTS_UP_TO ${QGC_QT_MAXIMUM_VERSION}
${EXTRA_STANDARD_PROJECT_SETUP_OPTIONS}
)

qt_policy(
SET QTP0001 NEW
SET QTP0002 NEW
SET QTP0003 NEW
SET QTP0004 NEW
SET QTP0005 NEW
)

#######################################################

QGroundControl Options

#######################################################

add_compile_definitions(
$<$<NOT:$BOOL:${QGC_STABLE_BUILD}>:QGC_DAILY_BUILD>
$<$BOOL:${QGC_BUILD_TESTING}:QGC_UNITTEST_BUILD>
$<$BOOL:${QGC_DEBUG_QML}:QT_QML_DEBUG>
$<$BOOL:${QGC_DISABLE_APM_MAVLINK}:QGC_NO_ARDUPILOT_DIALECT>
$<$BOOL:${QGC_VIEWER3D}:QGC_VIEWER3D>
)

if(NOT QGC_BUILD_TESTING)
set(BUILD_TESTING OFF CACHE INTERNAL "" FORCE)
endif()

if("${CMAKE_OSX_ARCHITECTURES}" MATCHES "arm64;x86_64" OR "${CMAKE_OSX_ARCHITECTURES}" MATCHES "x86_64;arm64")
set(MACOS_UNIVERSAL_BUILD ON)
endif()

TODO: Force building dependencies if(NOT CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL CMAKE_SYSTEM_PROCESSOR)?

if(CMAKE_OSX_ARCHITECTURES AND NOT "${CMAKE_HOST_SYSTEM_PROCESSOR}" IN_LIST CMAKE_OSX_ARCHITECTURES)

include(CPM)
if(CMAKE_CROSSCOMPILING OR ANDROID OR MACOS_UNIVERSAL_BUILD)
set(CPM_DOWNLOAD_ALL ON)
endif()

#######################################################

Custom Build Configuration

#######################################################

if(QGC_CUSTOM_BUILD)
add_subdirectory(custom)
endif()

#######################################################

QGroundControl Resources

#######################################################

Note: Adding Resources to Library instead requires using Q_INIT_RESOURCE(qgcresources)

if(NOT QGC_CUSTOM_BUILD)
# Custom builds can override the resources
list(APPEND QGC_RESOURCES
${CMAKE_SOURCE_DIR}/qgcimages.qrc
${CMAKE_SOURCE_DIR}/qgcresources.qrc
${CMAKE_SOURCE_DIR}/qgroundcontrol.qrc
)
endif()

list(APPEND QGC_RESOURCES
${CMAKE_SOURCE_DIR}/resources/InstrumentValueIcons/InstrumentValueIcons.qrc
${CMAKE_SOURCE_DIR}/src/FirmwarePlugin/APM/APMResources.qrc
${CMAKE_SOURCE_DIR}/src/FirmwarePlugin/PX4/PX4Resources.qrc
)

if(QGC_UTM_ADAPTER)
list(APPEND QGC_RESOURCES ${CMAKE_SOURCE_DIR}/src/UTMSP/utmsp.qrc)
else()
list(APPEND QGC_RESOURCES ${CMAKE_SOURCE_DIR}/src/UTMSP/dummy/utmsp_dummy.qrc)
endif()

if(QGC_BUILD_TESTING)
list(APPEND QGC_RESOURCES ${CMAKE_SOURCE_DIR}/test/UnitTest.qrc)
endif()

#######################################################

QGroundControl Target

#######################################################

qt_add_executable(${CMAKE_PROJECT_NAME}
WIN32
MACOSX_BUNDLE
src/main.cc
${QGC_RESOURCES}
)

if(NOT ANDROID AND NOT IOS)
target_sources(${CMAKE_PROJECT_NAME}
PRIVATE
src/RunGuard.cc
src/RunGuard.h
)
endif()

target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/src)

if(Qt6LinguistTools_FOUND)
file(GLOB TS_SOURCES ${CMAKE_SOURCE_DIR}/translations/qgc_*.ts)
set_source_files_properties(${TS_SOURCES} PROPERTIES OUTPUT_LOCATION "${CMAKE_BINARY_DIR}/i18n")
qt_add_translations(${CMAKE_PROJECT_NAME}
# TS_FILE_BASE ${CMAKE_PROJECT_NAME}
# TS_FILE_DIR ${CMAKE_SOURCE_DIR}/translations/
TS_FILES ${TS_SOURCES}
RESOURCE_PREFIX "/"
LUPDATE_OPTIONS -no-obsolete
)
endif()

set_target_properties(${CMAKE_PROJECT_NAME}
PROPERTIES
QT_RESOURCE_PREFIX "/qgc"
OUTPUT_NAME ${CMAKE_PROJECT_NAME}
)

if(WIN32)
# windows installer files shared with core and custom
set(DEPLOY_WIN_FILES
"${CMAKE_SOURCE_DIR}/deploy/windows/driver.msi"
"${CMAKE_SOURCE_DIR}/deploy/windows/nullsoft_installer.nsi"
"${CMAKE_SOURCE_DIR}/deploy/windows/QGroundControl.rc"
"${QGC_WINDOWS_INSTALL_HEADER_PATH}"
"${QGC_WINDOWS_ICON_PATH}"
)

# Destination directory where files will be copied
set(QGC_INSTALLER_SOURCE_WIN "${CMAKE_BINARY_DIR}/deploy/windows")
file(MAKE_DIRECTORY ${QGC_INSTALLER_SOURCE_WIN})
foreach(FILE ${DEPLOY_WIN_FILES})
    # filename without the path
    get_filename_component(FILE_NAME ${FILE} NAME)
    # re-copy the file if it changes
    add_custom_command(
        OUTPUT "${QGC_INSTALLER_SOURCE_WIN}/${FILE_NAME}"
        COMMAND ${CMAKE_COMMAND} -E copy_if_different "${FILE}" "${QGC_INSTALLER_SOURCE_WIN}/${FILE_NAME}"
        DEPENDS "${FILE}"  # Depend on the source file so that it re-copies when it changes
    )
    list(APPEND QGC_INSTALLER_SOURCE_WIN_FILES "${QGC_INSTALLER_SOURCE_WIN}/${FILE_NAME}")
endforeach()

target_sources(${CMAKE_PROJECT_NAME} PRIVATE ${QGC_INSTALLER_SOURCE_WIN_FILES})
set_target_properties(${CMAKE_PROJECT_NAME}
    PROPERTIES
        WIN32_EXECUTABLE TRUE
        QT_TARGET_RC_ICONS "${QGC_WINDOWS_ICON_PATH}"
)
add_compile_definitions(_USE_MATH_DEFINES)

elseif(MACOS)
set(MACOSX_BUNDLE_ICON_FILE "macx.icns")
set(app_icon_macos "${QGC_MACOS_ICON_PATH}/macx.icns")
set_source_files_properties(${app_icon_macos} PROPERTIES MACOSX_PACKAGE_LOCATION "Resources")
target_sources(${CMAKE_PROJECT_NAME} PRIVATE ${app_icon_macos})
set_target_properties(${CMAKE_PROJECT_NAME}
PROPERTIES
MACOSX_BUNDLE TRUE
MACOSX_BUNDLE_INFO_PLIST "${CMAKE_SOURCE_DIR}/deploy/macos/MacOSXBundleInfo.plist.in"
MACOSX_BUNDLE_BUNDLE_NAME "${CMAKE_PROJECT_NAME}"
MACOSX_BUNDLE_BUNDLE_VERSION "${PROJECT_VERSION}"
MACOSX_BUNDLE_COPYRIGHT "${QGC_APP_COPYRIGHT}"
MACOSX_BUNDLE_GUI_IDENTIFIER "${QGC_BUNDLE_ID}"
MACOSX_BUNDLE_ICON_FILE "macx.icns"
MACOSX_BUNDLE_INFO_STRING "${QGC_APP_DESCRIPTION}"
MACOSX_BUNDLE_LONG_VERSION_STRING "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}"
MACOSX_BUNDLE_SHORT_VERSION_STRING "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}"
)
elseif(IOS)
enable_language(OBJC)

set(CMAKE_XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET "14.0")
set(CMAKE_XCODE_ATTRIBUTE_TARGETED_DEVICE_FAMILY "1,2") # iPhone,iPad
set(CMAKE_XCODE_ATTRIBUTE_INFOPLIST_FILE "${CMAKE_CURRENT_SOURCE_DIR}/deploy/ios/iOS-Info.plist")

set_target_properties(${CMAKE_PROJECT_NAME}
    PROPERTIES
        QT_IOS_LAUNCH_SCREEN ${CMAKE_SOURCE_DIR}/deploy/ios/QGCLaunchScreen.xib
        XCODE_ATTRIBUTE_PRODUCT_BUNDLE_IDENTIFIER "org.mavlink.qgroundcontrol"
        XCODE_ATTRIBUTE_PRODUCT_NAME ${CMAKE_PROJECT_NAME}
        XCODE_ATTRIBUTE_CURRENT_PROJECT_VERSION ${CMAKE_PROJECT_VERSION}
        XCODE_ATTRIBUTE_MARKETING_VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
        XCODE_ATTRIBUTE_ASSETCATALOG_COMPILER_APPICON_NAME "AppIcon"
        XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET "14.0"
        XCODE_ATTRIBUTE_TARGETED_DEVICE_FAMILY "1,2" # iPhone,iPad
        XCODE_ATTRIBUTE_INFOPLIST_KEY_CFBundleDisplayName ${CMAKE_PROJECT_NAME}
        XCODE_ATTRIBUTE_INFOPLIST_KEY_LSApplicationCategoryType "public.app-category.mycategory"
        XCODE_ATTRIBUTE_GCC_GENERATE_DEBUGGING_SYMBOLS "YES"
)

# set(QT_NO_FFMPEG_XCODE_EMBED_FRAMEWORKS_CODE_SIGN_ON_COPY ON)
qt_add_ios_ffmpeg_libraries(${CMAKE_PROJECT_NAME})

elseif(ANDROID)
include(CPM)
CPMAddPackage(
NAME android_openssl
URL https://github.com/KDAB/android_openssl/archive/refs/heads/master.zip
)
include(${android_openssl_SOURCE_DIR}/android_openssl.cmake)
add_android_openssl_libraries(${CMAKE_PROJECT_NAME})

set(ANDROID_PLATFORM_ARCHITECTURE_CODE)
if(${ANDROID_ABI} STREQUAL "armeabi-v7a")
    set(ANDROID_PLATFORM_ARCHITECTURE_CODE "032")
elseif(${ANDROID_ABI} STREQUAL "arm64-v8a")
    set(ANDROID_PLATFORM_ARCHITECTURE_CODE "064")
elseif(${ANDROID_ABI} STREQUAL "x86")
    set(ANDROID_PLATFORM_ARCHITECTURE_CODE "132")
elseif(${ANDROID_ABI} STREQUAL "x86_64")
    set(ANDROID_PLATFORM_ARCHITECTURE_CODE "164")
endif()
set(ANDROID_VERSION_CODE "${ANDROID_PLATFORM_ARCHITECTURE_CODE}${PROJECT_VERSION_MAJOR}${PROJECT_VERSION_MINOR}")

set_target_properties(${CMAKE_PROJECT_NAME}
    PROPERTIES
        # QT_ANDROID_ABIS ${ANDROID_ABI}
        QT_ANDROID_MIN_SDK_VERSION ${QGC_QT_ANDROID_MIN_SDK_VERSION}
        QT_ANDROID_TARGET_SDK_VERSION ${QGC_QT_ANDROID_TARGET_SDK_VERSION}
        QT_ANDROID_PACKAGE_NAME "${QGC_ANDROID_PACKAGE_NAME}"
        QT_ANDROID_PACKAGE_SOURCE_DIR "${QGC_ANDROID_PACKAGE_SOURCE_DIR}"
        QT_ANDROID_VERSION_NAME ${CMAKE_PROJECT_VERSION}
        QT_ANDROID_VERSION_CODE ${ANDROID_VERSION_CODE}
        QT_QML_ROOT_PATH ${CMAKE_SOURCE_DIR}
        # QT_ANDROID_SDK_BUILD_TOOLS_REVISION
        # QT_ANDROID_SYSTEM_LIBS_PREFIX
)

endif()

add_compile_definitions(
QGC_APP_NAME="${QGC_APP_NAME}"
QGC_ORG_NAME="${QGC_ORG_NAME}"
QGC_ORG_DOMAIN="${QGC_ORG_DOMAIN}"
QGC_APP_VERSION_STR="${QGC_APP_VERSION_STR}"
QGC_SETTINGS_VERSION=${QGC_SETTINGS_VERSION}
)

add_subdirectory(src)

target_link_libraries(${CMAKE_PROJECT_NAME}
PRIVATE
Qt6::Core
Qt6::Core5Compat
Qt6::Quick
Qt6::Svg
Qt6::Widgets
QGC
QmlControls

)

target_link_libraries(QGroundControl
PUBLIC
-ljpeg
-lpng
)

if(ANDROID)
# Find JPEG library in NDK sysroot, Qt paths, or project paths
find_library(JPEG_LIBRARY jpeg
PATHS
${ANDROID_NDK}/sysroot/usr/lib/${ANDROID_ABI} # NDK sysroot for the ABI
${ANDROID_NDK}/platforms/android-${QGC_QT_ANDROID_MIN_SDK_VERSION}/arch-arm64/usr/lib # Alternative NDK path
${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI} # Project-specific libraries
${QT_LIBRARY_DIR} # Qt library directory (if applicable)
NO_DEFAULT_PATH # Restrict to these paths only
)

# Find PNG library (you’ll need to do the same for PNG if it’s missing)
find_library(PNG_LIBRARY png
    PATHS
        ${ANDROID_NDK}/sysroot/usr/lib/${ANDROID_ABI}
        ${ANDROID_NDK}/platforms/android-${QGC_QT_ANDROID_MIN_SDK_VERSION}/arch-arm64/usr/lib
        ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}
        ${QT_LIBRARY_DIR}
    NO_DEFAULT_PATH
)

# Check if libraries are found
if(NOT JPEG_LIBRARY)
    message(WARNING "JPEG library not found. Ensure libjpeg is available for ${ANDROID_ABI}. Attempting to proceed without it.")
    # Optionally, you can specify a fallback path or disable linking if not critical
    # set(JPEG_LIBRARY "")  # Comment out or handle gracefully
endif()
if(NOT PNG_LIBRARY)
    message(WARNING "PNG library not found. Ensure libpng is available for ${ANDROID_ABI}. Attempting to proceed without it.")
    # set(PNG_LIBRARY "")  # Comment out or handle gracefully
endif()

# Link the libraries (only if found)
if(JPEG_LIBRARY)
    target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE ${JPEG_LIBRARY})
endif()
if(PNG_LIBRARY)
    target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE ${PNG_LIBRARY})
endif()

# Continue with other Android-specific configurations
target_sources(${CMAKE_PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/android/src/AndroidInit.cc)
target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/android/src)

target_link_libraries(${CMAKE_PROJECT_NAME}
    PRIVATE
        Qt6::Core
        Joystick
        Utilities
)

if(NOT QGC_NO_SERIAL_LINK)
    target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE Comms)
endif()

endif()
#target_link_libraries(QGroundControl PRIVATE C:/libpng/build/libpng.a)

if(QGC_BUILD_TESTING)
add_subdirectory(test)
target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE qgctest)
endif()

if(ANDROID)
target_sources(${CMAKE_PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/android/src/AndroidInit.cc)

target_link_libraries(${CMAKE_PROJECT_NAME}
    PRIVATE
        Qt6::Core
        Joystick
        Utilities
)

target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/android/src)

if(NOT QGC_NO_SERIAL_LINK)
    target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE Comms)
endif()

endif()

qt_import_plugins(${CMAKE_PROJECT_NAME}
INCLUDE Qt6::QSvgPlugin
EXCLUDE_BY_TYPE geoservices
INCLUDE_BY_TYPE sqldrivers Qt6::QSQLiteDriverPlugin
)

include(Install)

include(PrintSummary)

[jsulm]

@InsideFPV said in QGCS error for Android:

target_link_libraries(QGroundControl
PUBLIC
-ljpeg
-lpng
)

Yes, you're linking libpng.
Was libpng found when running cmake?
Where is libpng for Android located?

[InsideFPV]

@jsulm i am adding only this code porting inside my cmake file.
target_link_libraries(QGroundControl
PUBLIC
-ljpeg
-lpng
)

I am getting gstreamer error and i ask chatgpt and it provide me this solution.
As form your questing i understand i have to add libpng in my project but i didnt added that till now.(Am i right...?)
please guide me how can i resolve it...?

[jsulm]

@InsideFPV said in QGCS error for Android:

i have to add libpng in my project but i didnt added that till now

You DID add it already! Just look at your CMakeLists.txt file.
I repeat the questions you did not answer:
Was libpng found when running cmake?
Where is libpng for Android located?

[InsideFPV]

@jsulm No libpng was not found while running cmake.
and it is not presend in this location:
"C:/Users/Software/AppData/Local/Android/Sdk/ndk/26.1.10909125/toolchains/llvm/prebuilt/windows-x86_64/sysroot/usr/lib/aarch64-linux-android"

where will i get libpng ?

[jsulm]

@InsideFPV If Android NDK does not provide it you will have to build it by yourself from source.

[InsideFPV]

@jsulm As i am using master clone.
As this is my first time doing I am struggling with steps. Can you guide me how to build it..?

[InsideFPV]

@jsulm hello sir please guide me how to build lpng file ?

[jsulm]

@InsideFPV Take a look at https://github.com/julienr/libpng-android
Official description how to build: https://github.com/pnggroup/libpng/blob/libpng16/INSTALL

[InsideFPV]

@jsulm sir i am adding libpng.so and libpng.a on my ndk path that is below
C:\Users\Software\AppData\Local\Android\Sdk\ndk\26.1.10909125\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\lib\aarch64-linux-android

but still getting error

[jsulm]

You're missing libjpeg library now. Install it.

[InsideFPV]

@jsulm where to find or build this library ?

[jsulm]

@InsideFPV https://www.ijg.org/files/

[InsideFPV]

@jsulm yes sir I am build this library but getting another error ..

[InsideFPV]

@jsulm hello sir
please guide me for above error

[jsulm]

@InsideFPV Maybe you should ask QGCS project? It is not part of Qt...