automoc usage in cmake

aravmadd

Hi,

I am using qt for one of my project. So My CMakeLists look like this. I removed some lines from this cmakelists which i shared because i felt that is not relevant to this particular problem.
So I am using uic_dummy.h in the sources list which contains qt related objects.the reason for not using set(CMAKE_AUTOUIC ON) is because we lost the ui file and so for the time being we are using that header file generated by uic compiler. I am also currently working to recreate ui by going through this header.

set (CMAKE_CXX_STANDARD 11)
include(FetchContent)

find_package(Qt5Core CONFIG REQUIRED)
find_package(Qt5Widgets)

set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--export-all-symbols")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")

find_package(Eigen3 CONFIG REQUIRED HINTS ${CMAKE_SOURCE_DIR}/libs/eigen/share/eigen3/cmake)
set(OpenCV_STATIC ON)
find_package(OpenCV CONFIG REQUIRED HINTS ${CMAKE_SOURCE_DIR}/libs/opencv)


# include directories
include_directories(inc)
include_directories(${CMAKE_BINARY_DIR})
include_directories(${OpenCV_INCLUDE_DIRS})
include_directories(${EIGEN3_INCLUDE_DIR})
# specify target
set(TARGET_NAME dummy)
set (TARGET_SOURCES
  inc/uic_dummy.h
  inc/dummy.h
  inc/stdafx.h
        src/moc_dummy.cpp 
	src/dummy.cpp
	src/stdafx.cpp
)

target_link_libraries(${TARGET_NAME} PRIVATE Qt5::Widgets tinyxml2::tinyxml2 ${OpenCV_LIBS})

In my case dummy class is declared in dummy.h and the definition of it is given in dummy.cpp. I am using #include"moc_dummy.cpp" in dummy.cpp for build time optimization things.

Given "dummy.h" and "dummy.cpp", and a project managed by cmake, the build system should direct moc to generate output like:
moc_dummy.cpp from dummy.h, iff dummy.h contains Q_OBJECT macro.

and in dummy.h contains Q_Object Macro.

So i am currently using moc_dummy.cpp in dummy.cpp by #include"moc_dummy.cpp". I wanted to do like this because in dummy.cpp i have a funciton where i am using connect function (connecting signals and slots) so i need to have moc included in this file.

so now my question is , Since i have moc file which is already created/used by someone and if i include that moc file its working properly but i wanted to generate moc file everytime when we build and then automatically do something like #include"moc_dummy.cpp".

The reason to do this kind of things because i planned to change a bit few things so i am trying to fix this first.

Please pardon me if my question misses some clarity. I tried my best to give more clarity. If you are missing some clarity i will try to develop my question based on your comments.
Please also ignore question title as i didnt get much better title

Any help is much appreciated.

jsulm

@aravmadd https://cmake.org/cmake/help/latest/prop_tgt/AUTOMOC.html

aravmadd

@jsulm Thanks for the reply. I alreay tried by seeing this manual. May be i might also done wrong. But i will let you know what i have done.

In CMakeLists.txt i made few changes which can be seen below

set (CMAKE_CXX_STANDARD 11)
include(FetchContent)

find_package(Qt5Core CONFIG REQUIRED)
find_package(Qt5Widgets)

set(CMAKE_AUTOMOC ON)

set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--export-all-symbols")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")

find_package(Eigen3 CONFIG REQUIRED HINTS ${CMAKE_SOURCE_DIR}/libs/eigen/share/eigen3/cmake)
set(OpenCV_STATIC ON)
find_package(OpenCV CONFIG REQUIRED HINTS ${CMAKE_SOURCE_DIR}/libs/opencv)


# include directories
include_directories(inc)
include_directories(${CMAKE_BINARY_DIR})
include_directories(${OpenCV_INCLUDE_DIRS})
include_directories(${EIGEN3_INCLUDE_DIR})
# specify target
set(TARGET_NAME dummy)
set (TARGET_SOURCES
  inc/uic_dummy.h
  inc/dummy.h
  inc/stdafx.h
	src/dummy.cpp
	src/stdafx.cpp
)

target_link_libraries(${TARGET_NAME} PRIVATE Qt5::Widgets tinyxml2::tinyxml2 ${OpenCV_LIBS})

and in my dummy.cpp i used like this

#include "stdafx.h"
#include "moc_dummy.cpp"
#include <string>
#include <ctime>

and the error comes like

AutoMoc error
2>  -------------
2>  "SRC:/dummy/src/dummy.cpp"
2>  includes the moc file "moc_dummy.cpp",
2>  but a header "dummy.{h,hh,h++,hm,hpp,hxx,in,txx}"
2>  could not be found in the following directories
2>    "SRC:/dummy/src"
2>    "SRC:/dummy/inc"
2>    "BIN:"
2>    "SRC:/libs/eigen/include/eigen3"
2>    "SRC:/libs/opencv/include"
2>    "C:/ADTF/3.3.3/pkg/adtffiltersdk/include"
2>    "C:/ADTF/3.3.3/pkg/a_utils/include"
2>    "C:/ADTF/3.3.3/pkg/adtfucom3/include"
2>    "C:/ADTF/3.3.3/pkg/adtfbase/include"
2>    "C:/ADTF/3.3.3/pkg/adtfstreaming3/include"
2>    "C:/ADTF/3.3.3/pkg/adtfsystemsdk/include"
2>    "C:/ADTF/3.3.3/pkg/adtfmediadescription/include"
2>    "C:/ADTF/3.3.3/pkg/adtfddl/include"
2>    "C:/ADTF/3.3.3/pkg/adtfremotesdk/include"
2>    "C:/ADTF/3.3.3/pkg/adtfrpc/include"
2>    "C:/ADTF/3.3.3/pkg/easy_profiler/include"
2>    "C:/Qt/5.12.2/msvc2015_64/include"
2>    "C:/Qt/5.12.2/msvc2015_64/include/QtWidgets"
2>    "C:/Qt/5.12.2/msvc2015_64/include/QtGui"
2>    "C:/Qt/5.12.2/msvc2015_64/include/QtANGLE"
2>    "C:/Qt/5.12.2/msvc2015_64/include/QtCore"
2>    "C:/Qt/5.12.2/msvc2015_64/mkspecs/win32-msvc"
2>    "SRC:/libs/tinyxml2/include"
2>    "C:/ADTF/3.3.3/pkg/adtfui/include"

From the error file i can say that it couldnt find dummy.h but dummy.h is there.So I am currently seeing what i have done wrong. Like checking paths and such things because from the error i can find this info only.

aravmadd

@aravmadd @jsulm My mistake. Spell error in one of the header files. The reason for popping out this error is i named one of the header file as dumy.h instead of dummy.h