I need to work with OpenMesh on my PC with Qt IDE, the snip of the simple *.pro file looks like:
DEFINES += _USE_MATH_DEFINES
DEFINES += NOMINMAX
#DEFINES += OM_STATIC_BUILD
#OpenMesh
INCLUDEPATH += "D:/Libraries/OpenMesh 6.3/include"
#Debug
LIBS += "D:/Libraries/OpenMesh 6.3/lib/OpenMeshCored.lib"
LIBS += "D:/Libraries/OpenMesh 6.3/lib/OpenMeshToolsd.lib"
# Release
LIBS += "D:/Libraries/OpenMesh 6.3/lib/OpenMeshCore.lib"
LIBS += "D:/Libraries/OpenMesh 6.3/lib/OpenMeshTools.lib"
However, I still got the error message: "C1189: #error: "You have to define _USE_MATH_DEFINES in the compiler settings!"
Can anyone help me?
if you wanna run your application from Qt creator for any reason as using qmake, you just have to add "DEFINES += _USE_MATH_DEFINES" to your *.pro file
The same error occured to me, but with MSVC 2019 16.6.1
Adding the define _USE_MATH_DEFINES in front of my OpenMesh include statement solves the problem for me.
#define _USE_MATH_DEFINES
#include <OpenMesh/Core/Mesh/PolyMesh_ArrayKernelT.hh>
The forum Post How does #define _USE_MATH_DEFINES work? helped me to understand the functionality behind the define.
Related
I have a basic issue with includes. My project structure looks like this:
myProject.pro
---directoryA
directoryA.pri
---directoryA1
firstHeader.h
secondHeader.h
secondHeader.cpp
main.cpp
This is how myProject.pro looks like (I have ony written lines which I though to be relevant)
myProject.pro:
include(directoryA/directoryA.pri)
SOURCES += main.cpp
directoryA.pri:
INCLUDEPATH += $$PWD
DEPENDPATH += $$PWD
HEADERS += \
$$PWD/directoryA/firstHeader.h \
$$PWD/directoryA/secondHeader.h
SOURCES+= \
$$PWD/directoryA/secondHeader.cpp
Given this structure, a simple include that I want to do in secondHeader.h from firstHeader.h does not work:
firstHeader.h:
#define firstheaderVar 4
secondHeader.h:
#include "firstheader.h"
int secondHeaderVar = firstheaderVar;
Simply I can not include anything from the first one within second one. It always gives the '...' was not declared in this scope error.
I suspect this to be an error caused by my project directory structure but can not find an elegant way to solve it.
Any help would be appreciated. Thanks!
you forgot: ./
try something like this:
#include "./firstheader.h"
I have built a simple dll using g++ under mingw:
We have an include file:
#ifndef __TESTDLL_H
#define __TESTDLL_H
class sineCalculator
{
double n;
public:
sineCalculator();
sineCalculator(double);
double sine();
void setAngle(double);
};
#endif
Then an implementation cpp:
#include <testdll.h>
#include <math.h>
sineCalculator::sineCalculator()
{
n = 0;
}
sineCalculator::sineCalculator(double x)
{
n = x;
}
double sineCalculator::sine()
{
return sin(n);
}
void sineCalculator::setAngle(double x)
{
n = x;
}
This I have compiled as a dll.producing both a .dll file and .a import library with the names visaTest.dll and libvisaTest.a
I can write a small program and link to this dll successfully just using the command line - no Qt just g++. I can create objects and run the methods all fine.
However, I now want to add this library to a Qt application within QtCreator. I have followed the advice of several questions and added these lines to my .pro file:
INCLUDEPATH += C:/msys64/home/hoyla/libs/
INCLUDEPATH +=C:/msys64/home/hoyla/includes/
DEPENDPATH +=C:/msys64/home/hoyla/libs/
win32:CONFIG(release, debug|release): LIBS += -LC:/msys64/home/hoyla/libs/ -lvisaTest
else:win32:CONFIG(debug, debug|release): LIBS += -LC:/msys64/home/hoyla/libs/ -lvisaTest
else:unix: LIBS += -L$$PWD/../../../../libs/ -lvisaTest
Although I use some absolute paths here I have also tried with relative paths. However, I keep getting undefined reference errors to my dll functions when building the Qt file. I would point out that the paths point to the location of my .a import library, the .dll itself is within the system path. What am I doing wrong here?
Mea Culpa! It seems I had compiled my library under 64-bit MinGW but Qt Creator was defaulting to the 32-bit toolchain. One would have thought that the linker might have been able to determine that was the error and generate a more useful error message but there we go. Lesson learned - make sure you're using the tools you think you're using.
I have a problem with my one of my projects.
I use QtCreator with MinGW and Qt 5.4.0
When I try to compile, this simple line gets me some errors :
CryptUnprotectData(data.password, NULL, NULL, NULL, NULL, (DWORD) 0, data.uncryptedPassword);
( with DATA_BLOB* data.password and DATA_BLOB* data.uncryptedPassword )
Gets me :
undefined reference to `_imp__CryptUnprotectData#28'
As said on the title, I included the Crypt32.Lib file in my .pro :
QT += core gui
QT += sql
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = ChromePass
LIBS += -L$$PWD/ -lCrypt32
TEMPLATE = app
SOURCES += main.cpp\
mainwindow.cpp \
chromehandler.cpp \
passdata.cpp
HEADERS += mainwindow.h \
chromehandler.h \
passdata.h
FORMS += mainwindow.ui
And as instructed in the MSDN api, included wincrypt.h :
#include <windows.h>
#include <wincrypt.h>
#include <cstdlib>
#include <fstream>
The error being still there, I checked wincrypt.h to make sure CryptUnprotectData is defined, and it is :
WINIMPM WINBOOL WINAPI CryptUnprotectData(DATA_BLOB *pDataIn,LPWSTR *ppszDataDescr,DATA_BLOB *pOptionalEntropy,PVOID pvReserved,CRYPTPROTECT_PROMPTSTRUCT *pPromptStruct,DWORD dwFlags,DATA_BLOB *pDataOut);
I've been trying for the whole day ... does anyone have a clue ?
Thank you very much !
The clue is that crypt32 library is not built with mingw this is why you are getting linking errors.
Bad news is that there is no simple way to resolve that. You can read about some ways to resolve here:
MingW missing some functions from the Win32 Crypto API
Discussion on Qt forum about this question can be found here:
https://forum.qt.io/topic/25527/cannot-find-how-to-link-to-crypt32-dll
Windows 7
Qt 5.4.0
OpenCV 2.4.10
Mingw 4.9.1
I'm trying to create a simple Hello World app, to test if Qt is working with OpenCV. Besides the stuff created by default, the code is
#include <opencv/cv.h>
#include <opencv/highgui.h>
(...)
cv::Mat image= cv::imread("pic.jpg");
cv::namedWindow("Test picture");
cv::imshow("Test picture", image);
cv::waitKey(1000);
(...)
However, I'm having trouble linking libraries. At first I've set the paths to *.dll.a files manually
INCLUDEPATH += C:/opencv/my_build/install/include
INCLUDEPATH += C:/opencv/my_build/install/include/opencv
INCLUDEPATH += C:/opencv/my_build/install/include/opencv2
LIBS += -LC:/opencv/my_build/install/x86/mingw/lib \
-llibopencv_core2410 \
-llibopencv_highgui2410
etc etc
But then I'd get a cannot find -llibopencv_<lib>2410 error. I've even used Qt Creator's "Add library" function (Projects -> rightclick -> add library), the result is the same. That error only goes away if I change -llibopencv_<lib>2410 to -opencv_<lib>2410. Which from my understanding is weird, as the "l" argument is missing.
Even though that error goes away, a bunch of others replace it, as I get undefined reference to cv::EVERYTHING error. I've looked around, found solutions to either problem, but solving one leads to the other and vice versa.
I'm fairly sure the OpenCV build is not at fault - I've already completed a pretty big console-ish app using it with Code::Blocks.
My current *.pro file :
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = OpenCVTest
TEMPLATE = app
SOURCES += main.cpp\
mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
INCLUDEPATH += C:/opencv/my_build/install/include
win32: LIBS += -L$$PWD/../../../../../../OpenCV/my_build/install/x86/mingw/lib/ -llibopencv_core2410
INCLUDEPATH += $$PWD/../../../../../../OpenCV/my_build/install/x86/mingw
DEPENDPATH += $$PWD/../../../../../../OpenCV/my_build/install/x86/mingw
win32: LIBS += -L$$PWD/../../../../../../OpenCV/my_build/install/x86/mingw/lib/ -llibopencv_highgui2410
INCLUDEPATH += $$PWD/../../../../../../OpenCV/my_build/install/x86/mingw
DEPENDPATH += $$PWD/../../../../../../OpenCV/my_build/install/x86/mingw
How to correctly link the OpenCV libraries to Qt Creator? Am I missing something?
edit: I've rebuilt the whole damn thing and it still doesn't work. God damn it.
When specifying library, you need to exclude the 'lib' part:
LIBS += -LC:/opencv/my_build/install/x86/mingw/lib \
-lopencv_core2410 \
-lopencv_highgui2410
Frankly, I have little idea of what went wrong. I've edited the environment PATH variable, twice, to include the OpenCV build. Maybe I've made a typo the first time. It now looks like this:
C:\MinGW\bin;C:\OpenCV\my_build\install\x86\mingw\bin;C:\Qt\5.4.0\5.4\mingw491_32\bin;
My *.pro file also looks different.
QT += core
QT -= gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = OpenCVTest
CONFIG += console
CONFIG -= app_bundle
TEMPLATE = app
INCLUDEPATH += C:/OpenCV/qtbuild//install/include
LIBS += "C:/OpenCV/qtbuild/install/x86\mingw/lib/*.a"
SOURCES += main.cpp\
mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
I've change +=gui to -=gui and added CONFIG -= app_bundle. The INCLUDE and LIBS paths are also different now - I won't be changing them out of an irrational fear something will go horribly wrong again.
And lastly, I've simply removed the previous project and made a new one. Maybe something else got corrupted?
Anyway, it works now, after doing these things.
I am a bit stuck at the moment with a little sample project that I would like to run to test some cryptology that I want to use in a main project.
Basically I am using the latest Qt Creator and I have created a simple window dialog. Furthermore, I would like to test the PBKDF2 implementation through CkCrypt2
So what I have done is downloading the X64 version of the library and added it to my project folder. I then told my Qt project to use an external library, the final .pro file looks like this:
#-------------------------------------------------
#
# Project created by QtCreator 2013-06-09T18:09:44
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = crypt2test
TEMPLATE = app
SOURCES += main.cpp\
m
ainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
win32:CONFIG(release, debug|release): LIBS += -L$$PWD/libs/ -lChilkatDbgDll_x64
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/libs/ -lChilkatDbgDll_x64d
else:unix: LIBS += -L$$PWD/libs/ -lChilkatDbgDll_x64
INCLUDEPATH += $$PWD/include
DEPENDPATH += $$PWD/include
I can successfully load the library but I cannot start the application.
My mainwindow.cpp looks like this:
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "CkCrypt2.h"
#include <QDebug>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
CkCrypt2 crypt;
bool success;
success = crypt.UnlockComponent("Just some random text ");
if ( !success )
{
qDebug() << "Not successfully unlocking the library";
}
}
MainWindow::~MainWindow()
{
delete ui;
}
The error message I get in the compiler is:
c:\qt\qt5.0.2\tools\qtcreator\bin\crypt2test\include\CkString.h:127: error: C2061: syntax error : identifier 'SYSTEMTIME'
c:\qt\qt5.0.2\tools\qtcreator\bin\crypt2test\include\CkString.h:129: error: C2061: syntax error : identifier 'SYSTEMTIME'
C:\Qt\Qt5.0.2\Tools\QtCreator\bin\crypt2test\include\CkCrypt2.h:429: error: C2061: syntax error : identifier 'SYSTEMTIME'
Looking into the files I see:
void appendDateRfc822(SYSTEMTIME &sysTime);
void appendDateRfc822Gmt(SYSTEMTIME &sysTime);
// GETSIGNATURESIGNINGTIME_BEGIN
bool GetSignatureSigningTime(int index, SYSTEMTIME &outSysTime);
// GETSIGNATURESIGNINGTIME_END
Okay, so it is complaining about the SYSTEMTIME construct. So I look up the error C2061
Basically it says:
The compiler found an identifier where it wasn't expected. Make sure
that identifier is declared before you use it.
Which makes sense, so I look up the SYSTEMTIME and try to do :
#include <windows.h>
But that leads to many more errors in the windows.h file itself.
I use the MS Visual C++ compiler in Qt. Even though I use qmake. I am very new to this and I do not understand it all yet. Furthermore, I have no idea how to fix this, because including the windows.h does not help.
What seems to be the problem here ? Is this an issue regarding my compiler or the constulation that I use a third party app which library is compiled with MS Visual C++ and I am now trying to use this on my Windows machine in Qt with a Windows Visual C++ compiler ?
For any help I am gratefully thankful!
EDIT1:
Actually, after a clean all and qmake and build project I have now different errors and none were found in the Windows.h as previously stated. Since there were so many I have made a screenshot: http://i.imgur.com/B8EoENB.png
EDIT2:
I have adjusted the library that I include. Before this I was using the multi-threaded library of CkCrypt in the Debug mode. I have now included the single realease library. Which is located in the same directory.
When including windows.h I got the errors that things were already defined. So I removed the line again. With this result: http://i.imgur.com/z415txR.png
This shows at the bottom that MSVCRT conflichts with other library. It mentions to use NODEFAULTLIB:library but I am not to sure how to do that. Will google and keep this up to date as I process.
Many years ago, Chilkat was originally developed for the Windows platform only, and used SYSTEMTIME for this reason. In the last 5 years (approx) Chilkat is cross-platform, and SYSTEMTIME no longer makes sense. To cope with the issue, there is a "SystemTime.h" header in the same directory as the CkCrypt2.h header file. You could include this to solve the problem. (However, if WIN32 is defined, you'll probably need to edit SystemTime.h to remove the #ifdef.)
In any case, the methods using SYSTEMTIME are going to be deprecated. For any method or property that uses SYSTEMTIME, there should be a newer alternative method/property that instead uses CkDateTime.
Finally, Chilkat will test with Qt so that for the next version, (hopefully) Qt out-of-the-box will compile without any pitfalls.