I am getting LINK : fatal error LNK1000: unknown error at 00007FF62BCB3572; consult documentation for technical support options
when linking a static library with my project. I have made sure that this library is built with -vcvars_ver=14.0 and /MD flag just as my project.
One interesting thing is when this static lib is built on my machine it links without any error, but when its built on different machine it throws this error.
Related
I am trying to build a Library (MyLib) that has a static dependency to boost. However, when I am trying link MyLib to an Application I will get linking erorrs saying that boost functions cannot be found.
I did used the pointer to implementation idiom.
Conan installed the static lib of boost (I checked that).
The plattform is windows.
Does anyone has an idea what I am doing wrong?
Here is the CMakeLists.txt
cmake_minimum_required(VERSION 3.24)
set(TARGET_NAME MyLib)
project(${TARGET_NAME}Project)
include(${CMAKE_CURRENT_LIST_DIR}/build/conanbuildinfo.cmake)
conan_basic_setup()
set(
SRC_FILES
src/FileA.cpp
src/FileB.cpp
src/FileC.cpp
)
add_library(${TARGET_NAME} ${SRC_FILES})
target_include_directories(
${TARGET_NAME}
PUBLIC ${CMAKE_CURRENT_LIST_DIR}/include/public
PRIVATE ${CMAKE_CURRENT_LIST_DIR}/include/private
)
target_link_libraries(${TARGET_NAME} PRIVATE ${CONAN_LIBS_STATIC})
set_property(TARGET ${TARGET_NAME} PROPERTY CXX_STANDARD 17)
install(TARGETS ${TARGET_NAME} DESTINATION lib)
This is the erorr I am getting:
Severity Code Description Project File Line Suppression State
Error LNK2001 unresolved external symbol "public: class boost::log::v2s_mt_nt6::attribute_value_set::const_iterator __cdecl boost::log::v2s_mt_nt6::attribute_value_set::end(void)const " (?end#attribute_value_set#v2s_mt_nt6#log#boost##QEBA?AVconst_iterator#1234#XZ) Main C:\dev\TestProjects\VSLog\Main\CppLogLib.lib(ConsoleLogWrapper.obj) 1
Many thanks in advance.
I tried with CMake setting like
set(Boost_USE_STATIC_LIBS ON) or set_target_properties(${TARGET_NAME} PROPERTIES LINK_FLAGS "OPT:NOREF") but it did not help.
I also try to build MyLib using sln (and Boost downloaded from boost.org) and here I also get a linking error:
Error LNK1104 cannot open file 'libboost_log-vc143-mt-gd-x64-1_81.lib'
For one of my Qt Embedded projects I'm using a external Qt lib called SMTPEmail. This lib needs to be compiled before being included into a project, something that I managed to do successfully both for Qt 4.8 ARM and for Desktop.
The problem I'm getting is that when I include the headers into my project and include the library in the .pro, the linker gives me
(path_to_libs)/libSMTPEmail.so: undefined reference to `QSslSocket::connectToHostEncrypted(QString const&, unsigned short, QFlags<QIODevice::OpenModeFlag>)'
(path_to_libs)/libSMTPEmail.so: undefined reference to `QSslSocket::QSslSocket(QObject*)'
collect2: ld returned 1 exit status
make: *** [re8k_interface-tgt] Error 1
but only for compiling for ARM. IOW compiling the lib for both ARM and Desktop goes OK, compiling the project for Desktop using the lib goes OK but compiling it for ARM using the lib goes wrong.
Following this forum thread I suspected this could be due to missing the link to the library file of openssl (the project points to different lib folders when compiling for different environments). So I searched for all "openssl" related files inside the compiler for ARM (arm-arago-linux-gnueabi) and included in the same folder where the .so is located; same error. I then suspected the lib itself had other dependencies which were not in the path_to_libs, so I did a readelf -d libSMTPEmail.so and later in the .so.1 and readelf did return some lib dependencies that were not inside the same folder of the library. I then copied all such dependencies to the folder and got no success either.
So what could be happening? All dependencies known by me were put in place and I still get the error only for the situation where the lib is included by another project compiled for ARM.
You need to point your QMake where your libs and header file is in your .pro file;
So find where your library is assume /usr/local/include then ;
INCLUDEPATH += /usr/local/include
Add which libs you will use;
LIBS += -lSMTPEmail
You can check my answer here;
Two things stand out for me in your question:
1.
undefined reference to
This error message means that there was an error in the linking step of compilation. This occurs when you include a header to a function/class/variable but don't have the definition included in your own sources, or you do not link in a static library that does.
Searching for dependencies in libraries that are already compiled (.dll or .so) is too late, the compiler is looking for a static link, not a dynamic link.
2.
compiling the lib for both ARM and Desktop goes OK, compiling the
project for Desktop using the lib goes OK but compiling it for ARM
using the lib goes wrong.
This suggests that you are using conditional compilation in your .pro file that does a "both" compilation, a "desktop only" compilation and a "ARM only" compilation. If this is correct, you need to examine your compilation instructions for your "ARM only" compilation.
The error message itself refers to you using two functions from the QSslStock class. These are part of the QtNetwork module so you should have the following in your .pro file in order for the necessary links to be formed.
Qt += network
I am trying to use the SFML library for audio in my project.
I am developing in eclipse juno for c++ and am using SFML v1.6.
I added sfml-audio-d.lib, sfml-main-d.lib, and sfml-system-d.lib into
C/C++ General > paths and symbols>libraries
I also defined a macro named SFML_DYNAMIC into
C/C++ Build>Settings>C++ Compiler>Preprocessor 'Defines /D' section
I added the directory that contains all the dlls into the PATH environment variable.
In my code I make use of sf::SoundBuffer, but when I try to build the project I get the following linker error:
Chunk.obj : error LNK2001: unresolved external symbol "private: static class sf::SoundBuffer * Chunk::breakBlockSound" (?breakBlockSound#Chunk##0PAVSoundBuffer#sf##A)
MyProject.exe : fatal error LNK1120: 1 unresolved externals
Had to rebuild the project in VS2010 before using it. Works now.
It's me again. I'm back with an all new project and an all new problem.
I am trying to implement something for Growl. Either using a static or shared library (both are provided). I included the necessary header and linked to the library. (2 ways actually, once through the project properties and the other through a pragma statement). However, im still receiving the following linker errors:
error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall Growl::Growl(enum Growl_Protocol,char const * const,char const * const,char const * * const,int)" (__imp_??0Growl##QAE#W4Growl_Protocol##QBD1QAPBDH#Z)
error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall Growl::~Growl(void)" (__imp_??1Growl##QAE#XZ)
fatal error LNK1120: 2 unresolved externals
The line of code that is causing these linker errors is this line:
const char *n[2] = { "username" , "password" };
Growl *growl = new Growl(GROWL_TCP,NULL, "Appname", (const char **const)n,2);
The header file is being included at the top of the file and I am linking with the following line:
#include "..\\..\\..\\libs\\Growl\\growl++.hpp"
#pragma comment(lib, "..\\..\\..\\libs\\Growl\\libgrowl-static++.lib")
The header source can be found here:
https://github.com/psinnott/gntp-send/blob/master/headers/growl%2B%2B.hpp
I retrieved the pre-built binaries from the following page:
https://github.com/psinnott/gntp-send/wiki/Windows
Some extra info: I do have my Project Propeties character set to use Multi-Byte Character Set, im under the assumption this shouldn't affect anything. This is also a Win32 Console application.
Where am I going wrong?
Update:
Found this via google:
http://groups.google.com/group/growl-for-windows/browse_thread/thread/6c48a62454d062f1
Followed the instructions:
Added the libgrowlstatic.lib (alongside libgrowlstatic++.lib)
Added the pre-processor definitions, GROWL_STATIC and GROWL_CPP_STATIC
Got lots of error including:
LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library
LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library
fatal error LNK1169: one or more multiply defined symbols found
So I added the following line to Project properties, Linker, Command Line:
/NODEFAULTLIB:MSVCRTD /NODEFAULTLIB:LIBCMT
Now im getting alot more errors including some of the following:
libgrowl-static.lib(tcp.obj) : error LNK2019: unresolved external symbol _atoi referenced in function _growl_tcp_parse_hostname
libgrowl-static.lib(tcp.obj) : error LNK2019: unresolved external symbol _strchr referenced in function _growl_tcp_parse_hostname
libgrowl-static.lib(growl-static.obj) : error LNK2019: unresolved external symbol _fseek referenced in function _growl_tcp_register
libgrowl-static.lib(growl-static.obj) : error LNK2019: unresolved external symbol _fopen referenced in function _growl_tcp_register
libgrowl-static.lib(growl-static.obj) : error LNK2019: unresolved external symbol _strcpy referenced in function _growl_udp_notify
Been at this for several hours and can't seem to figure it out. 10+ views and no replies?
I swear im not being lazy. I looked into one of the answers provided about libraries but didn't have much luck. Nothing explained why this is acting the way it is. Please help!
#pragma comment(lib, "..\\..\\..\\libs\\Growl\\libgrowl-static++.lib")
There is a clear mismatch between the #pragma and the way your code is getting compiled. The name of the library strongly suggests this is a static link library, the "static" in the name makes that clear. The error messages however talk about __declspec(dllimport), a directive that's used when you compile code that #includes a header that assumes the code lives in a DLL instead of a static link library.
The other errors you are getting bear this out as well. The Project + Properties, C/C++, Code Generation, Runtime Library setting matters. You are using the /MD setting, a setting that's appropriate when you work with DLLs. The library no doubt was compiled with /MT, a setting appropriate when you create a monolithic EXE that doesn't use DLLs. You are trying to link two chunks of code that were built with conflicting settings, the linker falls over when trying to deal with this. It explicitly says so in an error message.
You'll need to either dig up the DLL version of the .lib or use /MT consistently in the rest of your code. There's usually a #define that tells the .h file which version of the .lib you intend to link.
This is working for me. It assumes you want to use the static libraries and not the dll.
Properties -> Configuration -> Properties -> VC++ Directories
Add directory of unzipped sdk to include and library directories
Properties -> Configuration -> Properties -> C/C++ -> Preprocessor
Add GROWL_STATIC and GROWL_CPP_STATIC to preprocessor definitions
Properties -> Configuration -> Properties -> C/C++ -> Code generation
Change runtime library to multi threaded ( /MT or /MTd )
Properties -> Configuration -> Properties -> Linker -> Input
Add ws2_32.lib , libgrowl-static.lib and libgrowl-static++.lib to additional dependencies
I got the c++/cli dll to link to a vc++ dll, but when trying it with the static version of the vc++ lib there are a bunch of linker errors. I want to use static so I dont have to copy all of the other vc++ dll files into my main c# project, which uses the c++/cli dll.
The vc++ library has the following properties:
*built in vs2008
*Static library
*uses MFC in a static library
*No common language runtime support
the c++/cli library has these properties:
*built in vs2010
*Dynamic Library
*Use of MFC in a shared DLL
*Common Language Runtime Support
*linker->input contains the vc++ lib file
I tried linking the vc++ lib it after building it in vs2010 but that didn't help.
So I get like 90 LNK2005 errors like these from nafxcwd.lib:
1>nafxcwd.lib(dlgprop.obj) : error LNK2005: "public: struct _PROPSHEETPAGEA & __thiscall CPropertyPage::GetPSP(void)" (?GetPSP#CPropertyPage##QAEAAU_PROPSHEETPAGEA##XZ) already defined in mfc100d.lib(mfc100d.dll)
then like 30 or so of these:
1>libcmtd.lib(sprintf.obj) : error LNK2005: _sprintf already defined in msvcrtd.lib(MSVCR100D.dll)
then three LNK4098 warnings:
LINK : warning LNK4098: defaultlib 'msvcrtd.lib' conflicts with use of other libs; use /NODEFAULTLIB:library
1>LINK : warning LNK4098: defaultlib 'nafxcwd.lib' conflicts with use of other libs; use /NODEFAULTLIB:library
1>LINK : warning LNK4098: defaultlib 'libcmtd.lib' conflicts with use of other libs; use /NODEFAULTLIB:library
then I get this last error:
libcmtd.lib(crt0.obj) : error LNK2019: unresolved external symbol main referenced in function __tmainCRTStartup
I looked up the LNK4098 warning on msdn and the solution was to add the conflicting libraries to the IgnoreSpecific Default libraries entry in the linker input settings, but this did not help.
Thanks,
alex
You can't link (C++) libraries build with different version of the VS compiler (sometimes it may accidentally seem to work but you'll usually get hard to diagnose crashes later on). Additionally, your errors seem to be typical of selecting different CRT configurations (single/multi-threaded, debug/release etc).