CMake Automoc Error 1 - Can't compile project - c++

Question

I just moved a project I built in Qt5 into my CMake project tree.
I exported the project in the CMake directory. However as I try to build the project the compiler gives me the following error:
[src/GUIconceptStudy/CMakeFiles/GUIconceptStudy_automoc] Error 1
See also the following print screen attached:
Also the CMakeLists.txt files is below:
cmake_minimum_required (VERSION 3.1)
project(GUIconceptStudy)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)
find_package( OpenCV REQUIRED )
find_package( Boost COMPONENTS system thread filesystem REQUIRED)
#find_package (sqlite3)
find_package(Qt5 REQUIRED COMPONENTS Core Quick)
###
### make sure we use c++11
###
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
###
###boost include stuff (required for all libcam)
###
INCLUDE_DIRECTORIES( ${Boost_INCLUDE_DIR} )
find_package(Qt5Widgets)
find_package(Qt5PrintSupport)
#find all the qt UI stuff
file(GLOB UI
"ui/*.ui"
)
#make them into headers
qt5_wrap_ui (UI_HDRS ${UI})
###
### add all your non QT sources
###
# find all non ui sources
file(GLOB SRCS
"src/*.h"
"src/*.cpp"
"src/*.hpp"
)
# find all ui related sources
file(GLOB UI_SRCS
"ui/*.h"
"ui/*.cpp"
"ui/*.hpp"
)
###
### Add executables
###
add_executable(GUIconceptStudy main/main.cpp ui/qrc/res.qrc ${SRCS} ${UI_HDRS} ${UI_SRCS})
target_link_libraries (GUIconceptStudy Qt5::Widgets ${Boost_LIBRARIES} ${OpenCV_LIBS} Qt5::PrintSupport Qt5::Core Qt5::Quick)
###
### Add Library
###
add_library(GUIconceptStudy_lib SHARED ui/qrc/res.qrc ${SRCS} ${UI_HDRS} ${UI_SRCS})
target_link_libraries (GUIconceptStudy_lib Qt5::Widgets ${Boost_LIBRARIES} ${OpenCV_LIBS} Qt5::PrintSupport Qt5::Core Qt5::Quick)
After looking at different on-line sources I could't find anything particularly useful. Anyone who can shed a little bit of light on what the problem could be?

Answer 1

It's a shot in a dark but this is most likely caused by the missing set(CMAKE_INCLUDE_CURRENT_DIR ON). As said in the documentation it should set because generated files are not in your source directory:
Generated moc_*.cpp and *.moc files are placed in the build directory so it is convenient to set the CMAKE_INCLUDE_CURRENT_DIR variable.
Another mistake I see people doing is mixing Qt processing pipelines. I've mentioned this already in my other answers. As it says in documentation on AUTOUIC property you shouldn't use qt5_wrap_ui function when this property is enabled.