Basicsof c make and git for a hello qt application
•
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These are the slides i have used for my talk in http://ayana.pes.edu/speakers/
![Hello world
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main (int argc, char *argv[]){
if (argc < 2) {
printf("Usage: %s numbern",argv[0]);
return 1;
}
double inputValue = atof(argv[1]);
double outputValue = sqrt(inputValue);
printf("The square root of %g is %gn", inputValue, outputValue);
return 0;
}
/* How to Compile?
---------------------------------------------------------------------------------------
$ gcc -c hello.c
$ gcc -o hello hello.o -lm
*/](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Basicsof c make and git for a hello qt application
- 1. Basics of CMake and Git for a Hello Qt Application :Dinesh
- 2. Hello world #include <stdio.h> #include <stdlib.h> #include <math.h> int main (int argc, char *argv[]){ if (argc < 2) { printf("Usage: %s numbern",argv[0]); return 1; } double inputValue = atof(argv[1]); double outputValue = sqrt(inputValue); printf("The square root of %g is %gn", inputValue, outputValue); return 0; } /* How to Compile? --------------------------------------------------------------------------------------- $ gcc -c hello.c $ gcc -o hello hello.o -lm */
- 4. Hello CMake CMakeLists.txt: cmake_minimum_required (VERSION 2.6) project (Hello) add_executable(Hello hello.c) target_link_libraries(Hello m) -------------------------------------------------------------------------------------------------------- # What to do? : $ mkdir build $ cd build $ cmake .. $ make
- 5. Other nice little things with CMake? IF (UNIX) CONFIGURE_FILE (${CMAKE_CURRENT_SOURCE_DIR}/libvsxu.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libvsxu.pc @ONLY) INSTALL (FILES ${CMAKE_CURRENT_BINARY_DIR}/libvsxu.pc DESTINATION ${VSXU_INSTALL_LIB_DIR}/pkgconfig) ENDIF (UNIX) ##################### find_package( OpenCV ) if(OpenCV_FOUND) add_subdirectory(src/video.camera) endif(OpenCV_FOUND) ######################################## #For the make install... install (TARGETS MathFunctions DESTINATION bin) install (FILES MathFunctions.h DESTINATION include)
- 6. Hello Qt #include <QApplication> #include <QLabel> int main(int argc, char *argv[]) { QApplication app(argc, argv); QLabel *label = new QLabel("Hello Qt!"); label->show(); return app.exec(); } /* How to Compile? --------------------------------------------------------------------------------------- $ g++ -I/usr/include/qt4/QtGui -I/usr/include/qt4/ -c helloqt.cpp $ g++ -o helloqt helloqt.o -L/usr/lib/i386-linux-gnu -lQtCore -lQtGui -lpthread */
- 7. CMake to the rescue... cmake_minimum_required (VERSION 2.6) project (Hello) #Find our needed libraries find_package(Qt4 REQUIRED) #Tell our compiler to get the headers from the found headers include(${QT_USE_FILE}) #Tell the compiler how to compile our code add_executable(HelloQt helloqt.cpp) #Tell the compiler to link our code with the found libraries target_link_libraries(HelloQt ${QT_LIBRARIES})
- 8. And other Qt Modules? QT_DONT_USE_QTCORE QT_DONT_USE_QTGUI QT_USE_QT3SUPPORT QT_USE_QTASSISTANT QT_USE_QAXCONTAINER QT_USE_QAXSERVER QT_USE_QTDESIGNER QT_USE_QTMOTIF QT_USE_QTMAIN QT_USE_QTNETWORK QT_USE_QTNSPLUGIN QT_USE_QTOPENGL QT_USE_QTSQL QT_USE_QTXML QT_USE_QTSVG QT_USE_QTTEST QT_USE_QTUITOOLS QT_USE_QTDBUS QT_USE_QTSCRIPT QT_USE_QTASSISTANTCLIENT QT_USE_QTHELP QT_USE_QTWEBKIT QT_USE_QTXMLPATTERNS QT_USE_PHONON # set (QT_USE_QTOPENGL TRUE)
- 9. But moc? SET(foo_MOC_HDRS Class1.h Class2.h Class3.h ) # After this call, foo_MOC_SRCS = moc_Class1.cxx moc_Class2.cxx moc_Class3.cxx. QT4_WRAP_CPP(foo_MOC_SRCS ${foo_MOC_HDRS}) ADD_EXECUTABLE(foo ${foo_SRCS} ${foo_MOC_SRCS})
- 10. and uic and rcc? SET(qtproject_UIS main_window.ui) SET(QtApp_RCCS application.qrc) QT4_ADD_RESOURCES(QtApp_RCC_SRCS ${QtApp_RCCS}) QT4_WRAP_UI(qtproject_UIS_H ${qtproject_UIS}) # Don't forget to include output directory, otherwise the UI file won't be wrapped! include_directories(${CMAKE_CURRENT_BINARY_DIR}) #Now add these generated files to the ADD_EXECUTABLE step # If this is NOT done, then the ui_*.h files will not be generated add_executable( qtproject ${qtproject_SRCS} ${qtproject_UIS_H} ${QtApp_RCC_SRCS})
- 11. Hello Git Because this is just too ridiculous!
- 12. The Git object model...
- 13. So... git? #Creating an empty repository $git init # Viewing changes $ git diff $ git status # Asking git to store files $ git add hello.c # Finally Saving a state $ git commit -m "Commit Message" # Listing all branches $ git branch #Creating a Local branch $ git branch mywork #Switching to a local branch $ git checkout mywork # deleting a branch $ git branch -d mywork
- 14. and now... git merge $ git checkout mywork $ git merge origin
- 15. and... git rebase $ git checkout mywork $ git rebase origin
- 16. Useful resources: ● http://www.cmake.org/cmake/help/cmake_tutorial.html ● http://qtnode.net/wiki/Qt4_with_cmake ● http://qt.nokia.com/learning/education/course-materials ● http://book.git-scm.com/3_distributed_workflows.html ● http://www.tenouk.com/ModuleW.html