[CMake] Fwd: Problem with creating shared library
Damir Porobic
damir_porobic at live.com
Wed Aug 15 11:51:21 EDT 2018
It does have unit tests and an executable which I use for testing, all that works fine.
I have the feeling that something with the CMakeList config is not alright. Is there any tutorial that explains how to correctly create a shared library?
________________________________
From: CMake <cmake-bounces at cmake.org> on behalf of Eric Noulard <eric.noulard at gmail.com>
Sent: Wednesday, August 15, 2018 17:13
To: CMake Mailinglist
Subject: [CMake] Fwd: Problem with creating shared library
---------- Forwarded message ---------
From: Eric Noulard <eric.noulard at gmail.com<mailto:eric.noulard at gmail.com>>
Date: mer. 15 août 2018 à 17:13
Subject: Re: [CMake] Problem with creating shared library
To: <damir_porobic at live.com<mailto:damir_porobic at live.com>>
May be check the list of symbol in the lib.
KImageAnnotator::KImageAnnotator(QPixmap const&)
may really not be there (only declared in some header and not defined anywhere).
Does the KImageAnnotator library have unit tests in its project?
If no executable linked to the ilb you won't discover the link error until you try to link something to the lib.
This is a kind wild guess, don't take it personally :-)
Le mer. 15 août 2018 à 16:21, Damir Porobic <damir_porobic at live.com<mailto:damir_porobic at live.com>> a écrit :
Thanks for the feedback.
It looks like this line is failing:
/usr/bin/c++ -std=c++0x -fno-operator-names -fno-exceptions -Wall -Wextra -Wcast-align -Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef -Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -Wl,--enable-new-dtags CMakeFiles/testApp.dir/main.cpp.o CMakeFiles/testApp.dir/testApp_automoc.cpp.o -o testApp /usr/local/lib64/libkImageAnnotator.so.0.0.1 /usr/lib64/libKF5CoreAddons.so.5.32.0 /usr/lib64/libKF5I18n.so.5.32.0 /usr/lib64/libKF5WidgetsAddons.so.5.32.0 /usr/lib64/libQt5Widgets.so.5.6.2 /usr/lib64/libQt5Gui.so.5.6.2 /usr/lib64/libQt5Core.so.5.6.2 -Wl,-rpath,/usr/local/lib64
The lib at /usr/local/lib64/libkImageAnnotator.so.0.0.1 seems to be correct, according to the sudo make install output from the lib
Install the project...
-- Install configuration: "Debug"
-- Installing: /usr/local/lib64/libkImageAnnotator.so.0.0.1
-- Installing: /usr/local/lib64/libkImageAnnotator.so.1
-- Set runtime path of "/usr/local/lib64/libkImageAnnotator.so.0.0.1" to "/usr/local/lib64"
-- Installing: /usr/local/lib64/libkImageAnnotator.so
...
-- Installing: /usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake
-- Installing: /usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig-debug.cmake
Don't know if this is OK, but it looks like the debug and the non-debug cmake versions are used:
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(3): if(${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} LESS 2.5 )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(6): cmake_policy(PUSH )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(7): cmake_policy(VERSION 2.6 )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(13): set(CMAKE_IMPORT_FILE_VERSION 1 )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(16): set(_targetsDefined )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(17): set(_targetsNotDefined )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(18): set(_expectedTargets )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(19): foreach(_expectedTarget kImageAnnotator )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(20): list(APPEND _expectedTargets ${_expectedTarget} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(21): if(NOT TARGET ${_expectedTarget} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(22): list(APPEND _targetsNotDefined ${_expectedTarget} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(24): if(TARGET ${_expectedTarget} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(28): if(${_targetsDefined} STREQUAL ${_expectedTargets} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(36): if(NOT ${_targetsDefined} STREQUAL )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(39): unset(_targetsDefined )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(40): unset(_targetsNotDefined )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(41): unset(_expectedTargets )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(45): get_filename_component(_IMPORT_PREFIX ${CMAKE_CURRENT_LIST_FILE} PATH )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(46): get_filename_component(_IMPORT_PREFIX ${_IMPORT_PREFIX} PATH )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(47): get_filename_component(_IMPORT_PREFIX ${_IMPORT_PREFIX} PATH )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(48): get_filename_component(_IMPORT_PREFIX ${_IMPORT_PREFIX} PATH )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(49): if(_IMPORT_PREFIX STREQUAL / )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(54): add_library(kImageAnnotator SHARED IMPORTED )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(56): set_target_properties(kImageAnnotator PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${_IMPORT_PREFIX}/include INTERFACE_LINK_LIBRARIES Qt5::Widgets;KF5::CoreAddons;KF5::I18n;KF5::WidgetsAddons )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(61): if(CMAKE_VERSION VERSION_LESS 2.8.12 )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(66): get_filename_component(_DIR ${CMAKE_CURRENT_LIST_FILE} PATH )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(67): file(GLOB CONFIG_FILES ${_DIR}/kImageAnnotatorConfig-*.cmake )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(68): foreach(f ${CONFIG_FILES} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(69): include(${f} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig-debug.cmake(6): set(CMAKE_IMPORT_FILE_VERSION 1 )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig-debug.cmake(9): set_property(TARGET kImageAnnotator APPEND PROPERTY IMPORTED_CONFIGURATIONS DEBUG )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig-debug.cmake(10): set_target_properties(kImageAnnotator PROPERTIES IMPORTED_LOCATION_DEBUG ${_IMPORT_PREFIX}/lib64/libkImageAnnotator.so.0.0.1 IMPORTED_SONAME_DEBUG libkImageAnnotator.so.1 )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig-debug.cmake(15): list(APPEND _IMPORT_CHECK_TARGETS kImageAnnotator )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig-debug.cmake(16): list(APPEND _IMPORT_CHECK_FILES_FOR_kImageAnnotator ${_IMPORT_PREFIX}/lib64/libkImageAnnotator.so.0.0.1 )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig-debug.cmake(19): set(CMAKE_IMPORT_FILE_VERSION )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(73): set(_IMPORT_PREFIX )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(76): foreach(target ${_IMPORT_CHECK_TARGETS} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(77): foreach(file ${_IMPORT_CHECK_FILES_FOR_${target}} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(78): if(NOT EXISTS ${file} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(90): unset(_IMPORT_CHECK_FILES_FOR_${target} )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(92): unset(_IMPORT_CHECK_TARGETS )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(98): set(CMAKE_IMPORT_FILE_VERSION )
/usr/local/share/kImageAnnotatorConfig/cmake/kImageAnnotatorConfig.cmake(99): cmake_policy(POP )
It looks like the correct cmake files are used.
Any more ideas?
Regards,
Damir
________________________________
From: Eric Noulard <eric.noulard at gmail.com<mailto:eric.noulard at gmail.com>>
Sent: Wednesday, August 15, 2018 12:18
To: damir_porobic at live.com<mailto:damir_porobic at live.com>
Cc: CMake Mailinglist
Subject: Re: [CMake] Problem with creating shared library
Le mer. 15 août 2018 à 10:32, Damir Porobic <damir_porobic at live.com<mailto:damir_porobic at live.com>> a écrit :
Hi Folks,
I'm trying to write a shared library and run into an issue where I can't find any clues to where the problem is.
I have a project with following structure:
src/
dir1/
file1.h
file1.cpp
dir2/
file2.h
file2.cpp
Now I have this CMakeList:
cmake_minimum_required(VERSION 3.5)
project(kImageAnnotator VERSION 0.0.1 LANGUAGES CXX)
...
add_library(${PROJECT_NAME} SHARED ${kimageannotator_SRCS})
target_link_libraries(${PROJECT_NAME} Qt5::Widgets KF5::CoreAddons KF5::I18n KF5::WidgetsAddons)
target_include_directories(${PROJECT_NAME} PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}> $<INSTALL_INTERFACE:include>)
set_target_properties(${PROJECT_NAME} PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION 1)
set(kimageannotator_CONFIG ${PROJECT_NAME}Config)
install(TARGETS ${PROJECT_NAME} EXPORT ${kimageannotator_CONFIG}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME})
install(EXPORT ${kimageannotator_CONFIG} DESTINATION share/${kimageannotator_CONFIG}/cmake)
export(TARGETS ${PROJECT_NAME} FILE ${kimageannotator_CONFIG}.cmake)
In another test project, I add the library like this:
...
find_package(kImageAnnotator REQUIRED)
add_executable(testApp main.cpp)
target_link_libraries(testApp Qt5::Widgets kImageAnnotator)
Now when I try to build my test project, I get this:
dporobic at linux ~/projects/testApp/build
$ cmake .. && make
-- Could not set up the appstream test. appstreamcli is missing.
-- Configuring done
-- Generating done
-- Build files have been written to: /home/dporobic/projects/testApp/build
[ 25%] Automatic moc for target testApp
[ 25%] Built target testApp_automoc
Scanning dependencies of target testApp
[ 50%] Building CXX object CMakeFiles/testApp.dir/main.cpp.o
[ 75%] Building CXX object CMakeFiles/testApp.dir/testApp_automoc.cpp.o
[100%] Linking CXX executable testApp
CMakeFiles/testApp.dir/main.cpp.o: In function `main':
main.cpp:(.text+0x8e): undefined reference to `KImageAnnotator::KImageAnnotator(QPixmap const&)'
collect2: error: ld returned 1 exit status
CMakeFiles/testApp.dir/build.make:120: recipe for target 'testApp' failed
make[2]: *** [testApp] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/testApp.dir/all' failed
make[1]: *** [CMakeFiles/testApp.dir/all] Error 2
Makefile:94: recipe for target 'all' failed
make: *** [all] Error 2
Any idea how I could/should troubleshoot such issue?
Try to compile in verbose mode
make VERBOSE=1
and have a look at the culprit link line.
You should see the reference to your previously built shared lib.
Check whether this lib is where it should be (may be you didn't install it?)
then check which kImageAnnotatorConfig.cmake file is used by the testApp project in order to see if any
[wrong and not up to date] test & trial version of this file is lying around.
--
Eric
--
Eric
--
Eric
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