How do I link GDAL to library compile

[am2222]

Hi,
I want to compile a library which is using gdal and I have to link it, I am currently adding vcpkg\installed\x86-windows\include to the include directory and also added vcpkg\installed\x86-windows\lib as libraries directory into my setup.py file. but it still raises liker error

d:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.22.27905\bin\HostX86\x64\link.exe /nologo /INCREMENTAL:NO /LTCG /nodefaultlib:libucrt.lib ucrt.lib /DLL /MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO "/LIBPATH:C:\Program Files\Python36\libs" "/LIBPATH:C:\Program Files\Python36\PCbuild\amd64" "/LIBPATH:d:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.22.27905\lib\x64" "/LIBPATH:C:\Program Files (x86)\Windows Kits\NETFXSDK\4.7.2\lib\um\x64" "/LIBPATH:D:\Windows Kits\10\lib\10.0.17763.0\ucrt\x64" "/LIBPATH:D:\Windows Kits\10\lib\10.0.17763.0\um\x64" /LIBPATH:E:\Personal\SideWorks\vcpkg\installed\x86-windows\lib gdal.lib geos.lib geos_c.lib /EXPORT:PyInit_pydggrid build\temp.win-amd64-3.6\Release\Personal\Lab\DGGRID\pydggrid-master\src\main.obj build\temp.win-amd64-3.6\Release\Personal\Lab\DGGRID\pydggrid-master\src\lib\dggrid\binpres.obj .
.
.
.
build\temp.win-amd64-3.6\Release\Personal\Lab\DGGRID\pydggrid-master\src\lib\dglib.obj /OUT:build\lib.win-amd64-3.6\pydggrid.cp36-win_amd64.pyd /IMPLIB:build\temp.win-amd64-3.6\Release\Personal\Lab\DGGRID\pydggrid-master\src\pydggrid.cp36-win_amd64.lib
Creating library build\temp.win-amd64-3.6\Release\Personal\Lab\DGGRID\pydggrid-master\src\pydggrid.cp36-win_amd64.lib and object build\temp.win-amd64-3.6\Release\Personal\Lab\DGGRID\pydggrid-master\src\pydggrid.cp36-win_amd64.exp
gridgen.obj : error LNK2001: unresolved external symbol GDALAllRegister
quadclip.obj : error LNK2001: unresolved external symbol CSLPartialFindString
DgOutShapefile.obj : error LNK2001: unresolved external symbol DBFWriteStringAttribute
build\lib.win-amd64-3.6\pydggrid.cp36-win_amd64.pyd : fatal error LNK1120: 215 unresolved externals
error: command 'd:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.22.27905\\bin\\HostX86\\x64\\link.exe' failed with exit status 1120

ext_modules = [
    Extension(
        include_dirs=[],
        # extra_link_args=[r'"/LIBPATH:E:\Personal\SideWorks\vcpkg\installed\x86-windows\lib"'],
        libraries =['gdal','geos','geos_c'],
        library_dirs =['E:\Personal\SideWorks\vcpkg\installed\x86-windows\lib'],
        language='c++'
    ),
]

I think this is because of my wrong linking method. I found that there is a CMAKE function named find_gdal (https://github.com/Kitware/CMake/blob/master/Modules/FindGDAL.cmake) which sets some environment variables. however I am using python's setup.py to build the library so I don't access to this command. Is there any way to link this library manually?

[am2222]

#5891

[MVoz]

?
https://github.com/am2222/pydggrid

set "boost_dir=E:/tools/vcpkg/installed/x64-windows/include/boost"

E:\tools\vcpkg\installed\x64-windows\python3\python -mpip install git+https://github.com/am2222/pydggrid

"C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.23.28105\bin\HostX64\x64\cl.exe" /c /nologo /Ox /W3 /GL /DNDEBUG /MT -IC:\temp\pip-req-build-nt2e76t9\src\lib\shapelib\include -IC:\temp\pip-req-build-nt2e76t9\src\lib\proj4lib\include -I/usr/local/include/python3.6 -IE:\tools\vcpkg\installed\x64-windows\python3\Library\include -IE:/tools/vcpkg/installed/x64-windows/include/boost -IE:\tools\vcpkg\installed\x64-windows\python3\Library\include -IE:/tools/vcpkg/installed/x64-windows/python3/include -IE:/tools/vcpkg/installed/x64-windows/include -IE:\tools\vcpkg\installed\x64-windows\python3\include -IE:\tools\vcpkg\installed\x64-windows\python3\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.23.28105\ATLMFC\include" "-IC:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.23.28105\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\cppwinrt" -IE:/tools/vcpkg/installed/x64-windows/include /EHsc /TpC:\temp\pip-req-build-nt2e76t9\src\main.cpp /Fobuild\temp.win-amd64-3.7\Release\temp\pip-req-build-nt2e76t9\src\main.obj /EHsc /DVERSION_INFO="0.0.14" -D_hypot=hypot /w /Y-

 Creating library build\temp.win-amd64-3.7\Release\temp\pip-req-build-nt2e76t9\src\pydggrid.cp37-win_amd64.lib and object build\temp.win-amd64-3.7\Release\temp\pip-req-build-nt2e76t9\src\pydggrid.cp37-win_amd64.exp

main.obj : error LNK2001: unresolved external symbol PyUnicode_AsEncodedString
main.obj : error LNK2001: unresolved external symbol PyBaseObject_Type
main.obj : error LNK2001: unresolved external symbol PyMem_Calloc
main.obj : error LNK2001: unresolved external symbol PyCFunction_Type
main.obj : error LNK2001: unresolved external symbol PyWeakref_NewRef
main.obj : error LNK2001: unresolved external symbol PyThreadState_Get
main.obj : error LNK2001: unresolved external symbol PyLong_AsUnsignedLong
main.obj : error LNK2001: unresolved external symbol PyThread_get_key_value
main.obj : error LNK2001: unresolved external symbol PyBytes_AsString
main.obj : error LNK2001: unresolved external symbol PyErr_NormalizeException
main.obj : error LNK2001: unresolved external symbol PyErr_Occurred
main.obj : error LNK2001: unresolved external symbol PyLong_FromSsize_t
main.obj : error LNK2001: unresolved external symbol PyUnicode_DecodeUTF8
main.obj : error LNK2001: unresolved external symbol PyEval_SaveThread
main.obj : error LNK2001: unresolved external symbol _PyThreadState_UncheckedGet
main.obj : error LNK2001: unresolved external symbol PyExc_RuntimeError
main.obj : error LNK2001: unresolved external symbol PyObject_SetAttrString
main.obj : error LNK2001: unresolved external symbol PyInstanceMethod_Type
main.obj : error LNK2001: unresolved external symbol PyExc_MemoryError
main.obj : error LNK2001: unresolved external symbol PyLong_FromUnsignedLongLong
main.obj : error LNK2001: unresolved external symbol Py_GetVersion
main.obj : error LNK2001: unresolved external symbol PyCapsule_GetContext
main.obj : error LNK2001: unresolved external symbol PyFrame_GetLineNumber
main.obj : error LNK2001: unresolved external symbol PyFloat_AsDouble
main.obj : error LNK2001: unresolved external symbol PyLong_AsUnsignedLongLong
main.obj : error LNK2001: unresolved external symbol PyGILState_Release
main.obj : error LNK2001: unresolved external symbol PyBytes_AsStringAndSize
main.obj : error LNK2001: unresolved external symbol _Py_NoneStruct
main.obj : error LNK2001: unresolved external symbol PyLong_AsLongLong
main.obj : error LNK2001: unresolved external symbol PyTuple_New
main.obj : error LNK2001: unresolved external symbol PyDict_Size
main.obj : error LNK2001: unresolved external symbol PyFloat_FromDouble
main.obj : error LNK2001: unresolved external symbol PyErr_SetString
main.obj : error LNK2001: unresolved external symbol PyExc_ValueError
main.obj : error LNK2001: unresolved external symbol PyDict_Next
main.obj : error LNK2001: unresolved external symbol PyErr_Format
main.obj : error LNK2001: unresolved external symbol PyThreadState_New
main.obj : error LNK2001: unresolved external symbol _Py_FalseStruct
main.obj : error LNK2001: unresolved external symbol PyFloat_Type
main.obj : error LNK2001: unresolved external symbol PyType_IsSubtype
main.obj : error LNK2001: unresolved external symbol PyErr_Restore
main.obj : error LNK2001: unresolved external symbol PyTuple_GetItem
main.obj : error LNK2001: unresolved external symbol PyErr_ExceptionMatches
main.obj : error LNK2001: unresolved external symbol PyCapsule_GetPointer
main.obj : error LNK2001: unresolved external symbol PyModule_AddObject
main.obj : error LNK2001: unresolved external symbol PyErr_Fetch
main.obj : error LNK2001: unresolved external symbol PyLong_AsLong
main.obj : error LNK2001: unresolved external symbol PyObject_ClearWeakRefs
main.obj : error LNK2001: unresolved external symbol PyList_New
main.obj : error LNK2001: unresolved external symbol PyUnicode_DecodeUTF16
main.obj : error LNK2001: unresolved external symbol PyModule_Create2
main.obj : error LNK2001: unresolved external symbol PyType_Ready
main.obj : error LNK2001: unresolved external symbol PyObject_GetAttrString
main.obj : error LNK2001: unresolved external symbol PyErr_Clear
main.obj : error LNK2001: unresolved external symbol PyList_Append
main.obj : error LNK2001: unresolved external symbol PyTuple_Size
main.obj : error LNK2001: unresolved external symbol PyException_SetTraceback
main.obj : error LNK2001: unresolved external symbol PyCapsule_New
main.obj : error LNK2001: unresolved external symbol PyCapsule_GetName
main.obj : error LNK2001: unresolved external symbol PyBytes_Size
main.obj : error LNK2001: unresolved external symbol PyDict_New
main.obj : error LNK2001: unresolved external symbol PyInstanceMethod_New
main.obj : error LNK2001: unresolved external symbol PyObject_IsInstance
main.obj : error LNK2001: unresolved external symbol PyUnicode_DecodeUTF32
main.obj : error LNK2001: unresolved external symbol PyMem_Free
main.obj : error LNK2001: unresolved external symbol PyTuple_SetItem
main.obj : error LNK2001: unresolved external symbol PyDict_GetItemString
main.obj : error LNK2001: unresolved external symbol PyThread_create_key
main.obj : error LNK2001: unresolved external symbol PyObject_GetItem
main.obj : error LNK2001: unresolved external symbol PyObject_CallObject
main.obj : error LNK2001: unresolved external symbol PyEval_InitThreads
main.obj : error LNK2001: unresolved external symbol PyObject_HasAttrString
main.obj : error LNK2001: unresolved external symbol PyProperty_Type
main.obj : error LNK2001: unresolved external symbol _Py_NotImplementedStruct
main.obj : error LNK2001: unresolved external symbol PyGILState_Ensure
main.obj : error LNK2001: unresolved external symbol PyCapsule_SetContext
main.obj : error LNK2001: unresolved external symbol PyNumber_Check
main.obj : error LNK2001: unresolved external symbol PyNumber_Long
main.obj : error LNK2001: unresolved external symbol PyThreadState_DeleteCurrent
main.obj : error LNK2001: unresolved external symbol PyExc_TypeError
main.obj : error LNK2001: unresolved external symbol PyThreadState_Clear
main.obj : error LNK2001: unresolved external symbol PyCFunction_NewEx
main.obj : error LNK2001: unresolved external symbol PyCapsule_Type
main.obj : error LNK2001: unresolved external symbol PyEval_GetBuiltins
main.obj : error LNK2001: unresolved external symbol PyDict_Copy
main.obj : error LNK2001: unresolved external symbol PyObject_Str
main.obj : error LNK2001: unresolved external symbol PyUnicode_AsUTF8String
main.obj : error LNK2001: unresolved external symbol PyExc_IndexError
main.obj : error LNK2001: unresolved external symbol PyExc_ImportError
main.obj : error LNK2001: unresolved external symbol _Py_TrueStruct
main.obj : error LNK2001: unresolved external symbol PyExc_SystemError
main.obj : error LNK2001: unresolved external symbol PyObject_SetItem
main.obj : error LNK2001: unresolved external symbol PyDict_DelItemString
main.obj : error LNK2001: unresolved external symbol PyUnicode_FromString
main.obj : error LNK2001: unresolved external symbol PyEval_AcquireThread
main.obj : error LNK2001: unresolved external symbol _PyType_Lookup
main.obj : error LNK2001: unresolved external symbol PyGILState_GetThisThreadState
main.obj : error LNK2001: unresolved external symbol PyObject_Repr
main.obj : error LNK2001: unresolved external symbol PyNumber_Float
main.obj : error LNK2001: unresolved external symbol PyType_Type
main.obj : error LNK2001: unresolved external symbol PyThread_set_key_value
main.obj : error LNK2001: unresolved external symbol _PyObject_GetDictPtr
build\lib.win-amd64-3.7\pydggrid.cp37-win_amd64.pyd : fatal error LNK1120: 102 unresolved externals
error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.23.28105\bin\HostX64\x64\link.exe' failed with exit status 1120

cl.exe" /c /nologo /Ox /W3 /GL /DNDEBUG /MT

MT - static
gridgen.obj : error LNK2001: unresolved external symbol GDALAllRegister - static symbol

__imp_GDALAllRegister - dynamic

python lib static !

[am2222]

@voskrese
Hi,
The pydggrid is the older version which gdal is not used in it. the newest version is using gdal and I am trying to compile it on windows to be able to make it's python wrapper work
so you mean I have to remove /mt from end of cl command?

[MVoz]

yes.

need to spread the log files and the project files themselves, because no one wants to guess bit by bit

[am2222]

@voskrese I think I found my mistake. I was addressing wrong architecture as lib and includes directory.

[JackBoosY]

@am2222 So, this issue was solved?

[am2222]

@JackBoosY Actually my code compiles well. but When I run it I face can not find dll error which I think something is wrong with gdal again, since I remember we need to define some global windows variables such as gdal_data whenever we need to use gdal on windows and here I have not defined it .
I have also added vcpkg bin directory to the path environment variable but did not get any results yet. I recently found an issue with proj.lib port on vcpkg and I think that also might be a reason.

[JackBoosY]

@am2222 Yes, the library name that GDAL calls proj has a default value (proj.dll), or uses the value in the registry. And I should solved this issue by PR #7917, please update vcpkg and rebuild proj4/gdal.

[am2222]

@JackBoosY Hi, Sure I will check it to see if the error is because of that issue or I am doing something wrong. Thanks for your help

[janholt]

@JackBoosY Thanks for proj4 6.2.
There is still a difficulty on Debug that gdal tries to load porj.dll, but we have proj_d.dll.
Solution that works for me on x64-windows is to add "PROJ_FLAGS=-DPROJ_STATIC -DPROJ_VERSION=5" to NMAKE_OPTIONS in gdal portfile.
Here is exerption from gdal nmake.opt:

# PROJ stuff
# Uncomment the following lines to link PROJ library statically. Otherwise
# it will be linked dynamically during runtime.
# To use the new API of proj5 or later, use
#PROJ_FLAGS = -DPROJ_STATIC -DPROJ_VERSION=5
# for proj 4.x:
#PROJ_FLAGS = -DPROJ_STATIC -DPROJ_VERSION=4

And still "FindPackage GDAL not working for debug libraries.... 6502".

[am2222]

@janholt I think I could build it but could not make my code work yet