[gdal-dev] Using GDAL with opencv in C++ there is errors under windows

[Raivo Rebane]

Hi

I am big problem. My program gives errors:

Severity    Code    Description    Project    File    Line Suppression State
Warning    C4251    'CPLJSONObject::m_osKey': class 
'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' 
needs to have dll-interface to be used by clients of class 
'CPLJSONObject'    project2    C:\Program 
Files\PostgreSQL\15\include\cpl_json.h    153
Warning    C4251    'OGRStyleTable::osLastRequestedStyleName': class 
'CPLString' needs to have dll-interface to be used by clients of class 
'OGRStyleTable'    project2    C:\Program 
Files\PostgreSQL\15\include\ogr_featurestyle.h    89
Warning    C4251    'OGR_SRSNode::m_listener': class 
'std::weak_ptr<OGR_SRSNode::Listener>' needs to have dll-interface to be 
used by clients of class 'OGR_SRSNode' project2    C:\Program 
Files\PostgreSQL\15\include\ogr_spatialref.h    129
Warning    C4251    'OGRSpatialReference::d': class 
'std::unique_ptr<OGRSpatialReference::Private,std::default_delete<OGRSpatialReference::Private>>' 
needs to have dll-interface to be used by clients of class 
'OGRSpatialReference'    project2    C:\Program 
Files\PostgreSQL\15\include\ogr_spatialref.h    159
Warning    C4251    'OGRCoordinateTransformationOptions::d': class 
'std::unique_ptr<OGRCoordinateTransformationOptions::Private,std::default_delete<OGRCoordinateTransformationOptions::Private>>' 
needs to have dll-interface to be used by clients of struct 
'OGRCoordinateTransformationOptions'    project2    C:\Program 
Files\PostgreSQL\15\include\ogr_spatialref.h    775
Warning    C4251    'OGRCurve::ConstIterator::m_poPrivate': class 
'std::unique_ptr<OGRCurve::ConstIterator::Private,std::default_delete<OGRCurve::ConstIterator::Private>>' 
needs to have dll-interface to be used by clients of class 
'OGRCurve::ConstIterator'    project2    C:\Program 
Files\PostgreSQL\15\include\ogr_geometry.h    948
Warning    C4251    'OGRSimpleCurve::Iterator::m_poPrivate': class 
'std::unique_ptr<OGRSimpleCurve::Iterator::Private,std::default_delete<OGRSimpleCurve::Iterator::Private>>' 
needs to have dll-interface to be used by clients of class 
'OGRSimpleCurve::Iterator'    project2    C:\Program 
Files\PostgreSQL\15\include\ogr_geometry.h    1067
Warning    C4251    'OGRSimpleCurve::ConstIterator::m_poPrivate': class 
'std::unique_ptr<OGRSimpleCurve::ConstIterator::Private,std::default_delete<OGRSimpleCurve::ConstIterator::Private>>' 
needs to have dll-interface to be used by clients of class 
'OGRSimpleCurve::ConstIterator'    project2    C:\Program 
Files\PostgreSQL\15\include\ogr_geometry.h    1084
Warning    C4251 'OGRGeometryFactory::TransformWithOptionsCache::d': 
class 
'std::unique_ptr<OGRGeometryFactory::TransformWithOptionsCache::Private,std::default_delete<OGRGeometryFactory::TransformWithOptionsCache::Private>>' 
needs to have dll-interface to be used by clients of class 
'OGRGeometryFactory::TransformWithOptionsCache'    project2 C:\Program 
Files\PostgreSQL\15\include\ogr_geometry.h    2883
Warning    C4251    'OGRFeature::FieldValue::m_poPrivate': class 
'std::unique_ptr<OGRFeature::FieldValue::Private,std::default_delete<OGRFeature::FieldValue::Private>>' 
needs to have dll-interface to be used by clients of class 
'OGRFeature::FieldValue'    project2    C:\Program 
Files\PostgreSQL\15\include\ogr_feature.h    385
Warning    C4251    'OGRFeature::ConstFieldIterator::m_poPrivate': class 
'std::unique_ptr<OGRFeature::ConstFieldIterator::Private,std::default_delete<OGRFeature::ConstFieldIterator::Private>>' 
needs to have dll-interface to be used by clients of class 
'OGRFeature::ConstFieldIterator'    project2    C:\Program 
Files\PostgreSQL\15\include\ogr_feature.h    528
Warning    C4251    'GDALMajorObject::sDescription': class 'CPLString' 
needs to have dll-interface to be used by clients of class 
'GDALMajorObject'    project2    C:\Program 
Files\PostgreSQL\15\include\gdal_priv.h    137
Warning    C4251    'GDALDefaultOverviews::osOvrFilename': class 
'CPLString' needs to have dll-interface to be used by clients of class 
'GDALDefaultOverviews'    project2    C:\Program 
Files\PostgreSQL\15\include\gdal_priv.h    190
Warning    C4251    'GDALDataset::Bands::Iterator::m_poPrivate': class 
'std::unique_ptr<GDALDataset::Bands::Iterator::Private,std::default_delete<GDALDataset::Bands::Iterator::Private>>' 
needs to have dll-interface to be used by clients of class 
'GDALDataset::Bands::Iterator'    project2    C:\Program 
Files\PostgreSQL\15\include\gdal_priv.h    473
Warning    C4251    'GDALDataset::Layers::Iterator::m_poPrivate': class 
'std::unique_ptr<GDALDataset::Layers::Iterator::Private,std::default_delete<GDALDataset::Layers::Iterator::Private>>' 
needs to have dll-interface to be used by clients of class 
'GDALDataset::Layers::Iterator'    project2    C:\Program 
Files\PostgreSQL\15\include\gdal_priv.h    669
Warning    C4251 'GDALDataset::Features::Iterator::m_poPrivate': class 
'std::unique_ptr<GDALDataset::Features::Iterator::Private,std::default_delete<GDALDataset::Features::Iterator::Private>>' 
needs to have dll-interface to be used by clients of class 
'GDALDataset::Features::Iterator'    project2    C:\Program 
Files\PostgreSQL\15\include\gdal_priv.h    727
Warning    C4251    'GDALColorTable::aoEntries': class 
'std::vector<GDALColorEntry,std::allocator<GDALColorEntry>>' needs to 
have dll-interface to be used by clients of class 'GDALColorTable'    
project2    C:\Program Files\PostgreSQL\15\include\gdal_priv.h    968
Warning    C4251    'GDALDriverManager::oMapNameToDrivers': class 
'std::map<CPLString,GDALDriver 
*,std::less<CPLString>,std::allocator<std::pair<const 
CPLString,GDALDriver *>>>' needs to have dll-interface to be used by 
clients of class 'GDALDriverManager'    project2 C:\Program 
Files\PostgreSQL\15\include\gdal_priv.h    1556
Error    LNK2001    unresolved external symbol "public: virtual class 
OGRGeometry * __cdecl OGRGeometry::MakeValid(void)const " 
(?MakeValid at OGRGeometry@@UEBAPEAV1 at XZ)    project2 
C:\Users\Raivo\source\Repos\cv46srcDD\project2\Source.obj    1
Error    LNK2019    unresolved external symbol "public: void __cdecl 
OGRFeature::SetField(int,union OGRField *)" 
(?SetField at OGRFeature@@QEAAXHPEATOGRField@@@Z) referenced in function 
"public: void __cdecl OGRFeature::SetField(char const *,union OGRField 
*)" (?SetField at OGRFeature@@QEAAXPEBDPEATOGRField@@@Z)    project2 
C:\Users\Raivo\source\Repos\cv46srcDD\project2\Source.obj    1

I trying with examples.

Headers are :

#include <gdal.h>
#include <cpl_json.h>
#include <gdal_priv.h>
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"
#include <iostream>
#include <conio.h>

What I mus do ?

Regards

Raivo