How do i use poppler lib in Qt quick application.

NIvil Wilson

@jsulm
after building poppler for android it shows the same errror
skipping incompatible /usr/local/lib//libpoppler-qt5.so when searching for -lpoppler-qt5.

jsulm

@NIvil-Wilson said in How do i use poppler lib in Qt quick application.:

/usr/local/lib//libpoppler-qt5.so

I'm sure this is not poppler built for Android.
You have to provide proper path to the Android version using LIBS.

NIvil Wilson

@jsulm
sir,
this is my cmak_install file.could you please check it .

# Install script for directory: /home/nivilwilsonp/Pictures/poppler-21.03.0

# Set the install prefix
if(NOT DEFINED CMAKE_INSTALL_PREFIX)
  set(CMAKE_INSTALL_PREFIX "/usr/local")
endif()
string(REGEX REPLACE "/$" "" CMAKE_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")

# Set the install configuration name.
if(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)
  if(BUILD_TYPE)
    string(REGEX REPLACE "^[^A-Za-z0-9_]+" ""
           CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
  else()
    set(CMAKE_INSTALL_CONFIG_NAME "RelWithDebInfo")
  endif()
  message(STATUS "Install configuration: \"${CMAKE_INSTALL_CONFIG_NAME}\"")
endif()

# Set the component getting installed.
if(NOT CMAKE_INSTALL_COMPONENT)
  if(COMPONENT)
    message(STATUS "Install component: \"${COMPONENT}\"")
    set(CMAKE_INSTALL_COMPONENT "${COMPONENT}")
  else()
    set(CMAKE_INSTALL_COMPONENT)
  endif()
endif()

# Install shared libraries without execute permission?
if(NOT DEFINED CMAKE_INSTALL_SO_NO_EXE)
  set(CMAKE_INSTALL_SO_NO_EXE "1")
endif()

# Is this installation the result of a crosscompile?
if(NOT DEFINED CMAKE_CROSSCOMPILING)
  set(CMAKE_CROSSCOMPILING "TRUE")
  set(CMAKE_SYSTEM_NAME Android)
set(CMAKE_SYSTEM_VERSION 24) # API level
set(CMAKE_ANDROID_ARCH_ABI armeabi-v7a)
set(CMAKE_ANDROID_NDK /home/nivilwilsonp/Android/Sdk/ndk/21.3.6528147)
set(CMAKE_ANDROID_STL_TYPE gnustl_static)
endif()

if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xUnspecifiedx" OR NOT CMAKE_INSTALL_COMPONENT)
  foreach(file
      "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so.108.0.0"
      "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so.108"
      )
    if(EXISTS "${file}" AND
       NOT IS_SYMLINK "${file}")
      file(RPATH_CHECK
           FILE "${file}"
           RPATH "")
    endif()
  endforeach()
  file(INSTALL DESTINATION "${CMAKE_INSTALL_PREFIX}/lib" TYPE SHARED_LIBRARY FILES
    "/home/nivilwilsonp/Pictures/poppler-21.03.0/build/libpoppler.so.108.0.0"
    "/home/nivilwilsonp/Pictures/poppler-21.03.0/build/libpoppler.so.108"
    )
  foreach(file
      "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so.108.0.0"
      "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so.108"
      )
    if(EXISTS "${file}" AND
       NOT IS_SYMLINK "${file}")
      if(CMAKE_INSTALL_DO_STRIP)
        execute_process(COMMAND "/usr/bin/strip" "${file}")
      endif()
    endif()
  endforeach()
endif()

if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xUnspecifiedx" OR NOT CMAKE_INSTALL_COMPONENT)
  if(EXISTS "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so" AND
     NOT IS_SYMLINK "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so")
    file(RPATH_CHECK
         FILE "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so"
         RPATH "")
  endif()
  file(INSTALL DESTINATION "${CMAKE_INSTALL_PREFIX}/lib" TYPE SHARED_LIBRARY FILES "/home/nivilwilsonp/Pictures/poppler-21.03.0/build/libpoppler.so")
  if(EXISTS "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so" AND
     NOT IS_SYMLINK "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so")
    if(CMAKE_INSTALL_DO_STRIP)
      execute_process(COMMAND "/usr/bin/strip" "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libpoppler.so")
    endif()
  endif()
endif()

if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xUnspecifiedx" OR NOT CMAKE_INSTALL_COMPONENT)
  file(INSTALL DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig" TYPE FILE FILES "/home/nivilwilsonp/Pictures/poppler-21.03.0/build/poppler.pc")
endif()

if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xUnspecifiedx" OR NOT CMAKE_INSTALL_COMPONENT)
  file(INSTALL DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig" TYPE FILE FILES "/home/nivilwilsonp/Pictures/poppler-21.03.0/build/poppler-qt5.pc")
endif()

if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xUnspecifiedx" OR NOT CMAKE_INSTALL_COMPONENT)
  file(INSTALL DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig" TYPE FILE FILES "/home/nivilwilsonp/Pictures/poppler-21.03.0/build/poppler-cpp.pc")
endif()

if(NOT CMAKE_INSTALL_LOCAL_ONLY)
  # Include the install script for each subdirectory.
  include("/home/nivilwilsonp/Pictures/poppler-21.03.0/build/utils/cmake_install.cmake")
  include("/home/nivilwilsonp/Pictures/poppler-21.03.0/build/test/cmake_install.cmake")
  include("/home/nivilwilsonp/Pictures/poppler-21.03.0/build/qt5/cmake_install.cmake")
  include("/home/nivilwilsonp/Pictures/poppler-21.03.0/build/cpp/cmake_install.cmake")

endif()

if(CMAKE_INSTALL_COMPONENT)
  set(CMAKE_INSTALL_MANIFEST "install_manifest_${CMAKE_INSTALL_COMPONENT}.txt")
else()
  set(CMAKE_INSTALL_MANIFEST "install_manifest.txt")
endif()

string(REPLACE ";" "\n" CMAKE_INSTALL_MANIFEST_CONTENT
       "${CMAKE_INSTALL_MANIFEST_FILES}")
file(WRITE "/home/nivilwilsonp/Pictures/poppler-21.03.0/build/${CMAKE_INSTALL_MANIFEST}"
     "${CMAKE_INSTALL_MANIFEST_CONTENT}")

SGaist

Hi,

I would avoid putting a library like that built for a different architecture/OS in such a generic path. You should store in an explicit dedicated folder.

jsulm

@NIvil-Wilson said in How do i use poppler lib in Qt quick application.:

skipping incompatible /usr/local/lib//libpoppler-qt5.so when searching for -lpoppler-qt5.

This error clearly states that /usr/local/lib//libpoppler-qt5.so is not compatible with what you are building.
Do

file /usr/local/lib//libpoppler-qt5.so

and post its output here.

NIvil Wilson

@jsulm said in How do i use poppler lib in Qt quick application.:

file /usr/local/lib//libpoppler-qt5.so

/usr/local/lib//libpoppler-qt5.so: symbolic link to libpoppler-qt5.so.1

jsulm

@NIvil-Wilson Then do

file /usr/local/lib//libpoppler-qt5.so.1

NIvil Wilson

@jsulm
sir,
the result for the command file /usr/local/lib//libpoppler-qt5.so.1 is
/usr/local/lib//libpoppler-qt5.so.1: symbolic link to libpoppler-qt5.so.1.27.0

NIvil Wilson

@SGaist
sir, i tried that too but the same problem occurs

SGaist

@NIvil-Wilson said in How do i use poppler lib in Qt quick application.:

@jsulm
sir,
the result for the command file /usr/local/lib//libpoppler-qt5.so.1 is
/usr/local/lib//libpoppler-qt5.so.1: symbolic link to libpoppler-qt5.so.1.27.0

Check that file then.

Did you ensure that cmake is finding your cross-compiled version and not the one from your system ?

NIvil Wilson

@SGaist
sir,
yes i ensured that the cmake is finding cross-compiled version and not the one from the system .
i stored the cross-compiled version in an explicit dedicated folder and the same message appears.
please help

SGaist

Did you check the architecture of your cross-compiled library ?

NIvil Wilson

@SGaist
sir ,
the architecture of cross-compiled library is given below.

readelf -h libpoppler-qt5.so.1.27.0
ELF Header:
Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00
Class: ELF64
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: DYN (Shared object file)
Machine: Advanced Micro Devices X86-64
Version: 0x1
Entry point address: 0x334f0
Start of program headers: 64 (bytes into file)
Start of section headers: 14323992 (bytes into file)
Flags: 0x0
Size of this header: 64 (bytes)
Size of program headers: 56 (bytes)
Number of program headers: 11
Size of section headers: 64 (bytes)
Number of section headers: 39
Section header string table index: 38

SGaist

@NIvil-Wilson said in How do i use poppler lib in Qt quick application.:

Machine: Advanced Micro Devices X86-64

Is your device running on a x86_64 machine ?

NIvil Wilson

@SGaist said in How do i use poppler lib in Qt quick application.:

x86_64

uname -a
Linux nivilwilsonp-desktop 5.8.0-48-generic #54~20.04.1-Ubuntu SMP Sat Mar 20 13:40:25 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

SGaist

Your desktop machine is.

I meant the target that runs Android. In any case, if it's ARM, libpoppler was not cross-compiled.

NIvil Wilson

@SGaist
sir,
the target device is ARM.could you give me instructions to cross compile libpoppler for ARM.

SGaist

What did you do to build poppler until now ?

NIvil Wilson

@SGaist
sir,
i used the settings given below to cross compile poppler library

if(NOT DEFINED CMAKE_CROSSCOMPILING)
set(CMAKE_CROSSCOMPILING "TRUE")
endif()

set(CMAKE_SYSTEM_NAME Android)
set(CMAKE_SYSTEM_VERSION 21) # API level
set(CMAKE_ANDROID_ARCH_ABI arm64-v8a)
set(CMAKE_ANDROID_NDK /home/nivilwilsonp/Android/Sdk/ndk/21.3.6528147)
set(CMAKE_ANDROID_STL_TYPE c++_shared)

SGaist

You might want to check here for how they build it for Androïd.