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Search found 580 results on 24 pages for 'linker'.

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• link to a different libc file

  - by bobby

  I want to supply the shared libs along with my program rather than using the system's: ldd says my program uses these shared libs: linux-gate.so.1 = (0xf7ef0000)(made by kernel) libc.so.6 = /lib32/libc.so.6 (0xf7d88000)(libc-2.7.so) /lib/ld-linux.so.2 (0xf7ef1000)(ld-2.7.so) I have successfully linked ld-xxx.so by compiling like this: gcc -std=c99 -D_POSIX_C_SOURCE=200112L -O2 -m32 -s -Wl,-dynamic-linker,ld-2.7.so myprogram.c But I have not managed to successfuly link libc-xxx.so. How can I do that ?

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• C++ extern keyword on functions. Why no just include the header file?

  - by user199421

  If I understand it correctly this means extern void foo(); that the function foo is declared in another translation unit. 1) Why not just #include the header in which this function is declared? 2) How does the linker know where to look for function at linking time?

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• How do I create both a .lib file and an .exe file in Visual C++?

  - by Spidey

  I currently have a console project which creates an .exe file; I want it to also create a .lib file so other projects, compiled as DLLs, would be able to call functions from the original project. I know it is possible, but I couldn't find how to do that. How do I tell the linker to also link a .lib?

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• Under what conditions will you get unresolved external symbol for __declspec(dllimport)?

  - by Mark

  I am converting an application to use .dlls and I'm riddled with linker errors stating unersolved external symbol"__declspec(dllimport) public: void __thiscall Rail::SetNextrail(class Rail *)" There is more gibberish at the end of this error message. Why should this happen and how do you fix it? __declspec(dllimport) is being placed with a macro defined as: #ifdef LUDOAI_EXPORT #define DECLSPECAI __declspec(dllexport) #else #define DECLSPECAI __declspec(dllimport) #endif

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• How to build glibc 2.11.2 on RHEL5?

  - by netvope

  Using gcc-4.4.4 or 4.5.0, I'm unable to make glibc-2.11.2 on RHEL 5.5: .././scripts/mkinstalldirs /dev/shm/glibc-2.11.2-build/sunrpc/rpcsvc CPP='gcc -B/home/klaw/share/rhel5/ -E -x c-header' /dev/shm/glibc-2.11.2-build/elf/ld-linux-x86-64.so.2 --library-path /dev/shm/glibc-2.11.2-build:/dev/shm/glibc-2.11.2-build/math:/dev/shm/glibc-2.11.2-build/elf:/dev/shm/glibc-2.11.2-build/dlfcn:/dev/shm/glibc-2.11.2-build/nss:/dev/shm/glibc-2.11.2-build/nis:/dev/shm/glibc-2.11.2-build/rt:/dev/shm/glibc-2.11.2-build/resolv:/dev/shm/glibc-2.11.2-build/crypt:/dev/shm/glibc-2.11.2-build/nptl /dev/shm/glibc-2.11.2-build/sunrpc/rpcgen -Y ../scripts -c rpcsvc/bootparam_prot.x -o /dev/shm/glibc-2.11.2-build/sunrpc/xbootparam_prot.T Inconsistency detected by ld.so: dynamic-link.h: 209: elf_get_dynamic_info: Assertion `info[15] == ((void *)0)' failed! make[2]: *** [/dev/shm/glibc-2.11.2-build/sunrpc/xnlm_prot.stmp] Error 127 make[2]: Leaving directory `/dev/shm/glibc-2.11.2/sunrpc' make[1]: *** [sunrpc/others] Error 2 make[1]: Leaving directory `/dev/shm/glibc-2.11.2' make: *** [all] Error 2 The error comes from the ld.so made by glibc: $ elf/ld.so Inconsistency detected by ld.so: dynamic-link.h: 209: elf_get_dynamic_info: Assertion `info[15] == ((void *)0)' failed! $ I got similar error with glibc-2.11.1 (only the line number of dynamic-link.h is different). Any ideas how I can fix this? gcc-4.4.4 and 4.5.0 were compiled with: binutils-2.20.1 gmp-5.0.1 mpc-0.8.2 mpfr-2.4.2

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• Error LNK1223 on ARM builds

  - by Seva Alekseyev

  eMbedded Visual C++ 3 project, building for PocketPC 2000. On the ARM build, the linker throws the following error: fatal error LNK1223: invalid or corrupt file: file contains invalid pdata contributions On SH3, the project compiles, links, and works. The project also works when built for ARM on Visual C++ 2005, but I need to test builds specifically from eVC3. Any ideas, please? What's a pdata contribution and how do I affect (or disable) those? It's something to do with exception handling; I've tried disabling SEH by specifying /EHsc, to no effect.

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• Linking with Boost error

  - by drhorrible

  I just downloaded and ran the boost installer for version 1.42 (from boostpro.com), and set up my project according to the getting started guide. However, when I build the program, I get this linker error: LINK : fatal error LNK1104: cannot open file 'libboost_program_options-vc90-mt-gd-1_42.lib' The build log adds this (I've replaced project-specific paths with *'s): Creating temporary file "******\Debug\RSP00001252363252.rsp" with contents [ /OUT:"*********.exe" /INCREMENTAL /LIBPATH:"C:\Program Files\boost\boost_1_42_0\lib" /MANIFEST /MANIFESTFILE:"Debug\hw6.exe.intermediate.manifest" /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /DEBUG /PDB:"********\Debug\***.pdb" /SUBSYSTEM:CONSOLE /DYNAMICBASE /NXCOMPAT /MACHINE:X86 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ".\Debug\****.obj" ".\Debug\****.exe.embed.manifest.res" ] Creating command line "link.exe @********\Debug\RSP00001252363252.rsp /NOLOGO /ERRORREPORT:PROMPT" I've also emailed [email protected] (with a message very similar to this), but I thought maybe so would be faster.

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• Eclipse c++ with mingw comiler cant build boost regex example, can find .a library files

  - by Kim

  Hi, I'm trying to build the boost regex example in eclipse using mingw on vista. I built boost ok with mingw as there are library files XXXX.a. I could build/compile the first boost example that doesnt require any of the compiled boost libraries. When I compile the regex example I get a linker error saying it cant find the library file. I have tried various libray file names eg leave off the .a extension, leave off the lib prefix etc. Now the interesting thing is that if I leave off the library extension and rename the library file to XXX.lib it works and runs ok. So why cant it read the .a library file? It must be my setup somewhere but I dont know where or what to set. From what I read everyone is ok linking the .a file except me :( Thanks in advance, Kim

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• gcc linking shared libraries with dependent libraries

  - by Geng

  I have a complicated project with multiple executable targets and multiple shared libraries. The shared libraries currently don't have their dependent shared libraries linked in, and the result is that linker arguments to build the executables are hideously long and hard to maintain. I'd like to add in the dependencies so the Makefiles become much cleaner. I want to add the following (example): gcc -shared -o libshared.so -lshared_dependent1 -lshared_dependent2 objfile1.o objfile2.o Is there a way to test if all the symbols in libshared.so will resolve based on that line? Is there a way to print out if any of the shared_dependent libraries specified were unnecessary? Thanks in advance.

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• How to prevent a globally overridden "new" operator from being linked in from external library

  - by mprudhom

  In our iPhone XCode 3.2.1 project, we're linking in 2 external static C++ libraries, libBlue.a and libGreen.a. libBlue.a globally overrides the "new" operator for it's own memory management. However, when we build our project, libGreen.a winds up using libBlue's new operator, which results in a crash (presumably because libBlue.a is making assumptions about the kinds of structures being allocated). Both libBlue.a and libGreen.a are provided by 3rd parties, so we can't change any of their source code or build options. When we remove libBlue.a from the project, libGreen.a doesn't have any issues. However, no amount of shuffling the linking order of the libraries seems to fix the problem, nor does any experimentation with the various linking flags. Is there some way to tell XCode to tell the linker to "have libGreen's use of the new operator use the standard C++ new operator rather than the one redefined by libBlue"?

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• Static lib that links another static lib and qmake? Odd linking error

  - by Dan O

  I have two qt .pro files, both using the lib TEMPLATE and staticlib CONFIG. The first library (lets call it 'core') is a dependency for the second lib (I'll call it 'foo'). In fact, there's a class in foo that extends a class in core, I will call this class Bar. When I instantiate the class (which is defined and implemented in foo, but extends a class (Bar) from core) in another project (not a lib) I get the following linking error: /usr/bin/ld: Undefined symbols: Bar::Bar() Basically, the linker cannot find the class in the core lib that has been derived in the foo lib, but ONLY when I instantiate the class in a third project that is using both libs. Is this behaviour expected? Regards, Dan O Update: I fixed it by directly invoking the Bars constructor in the third project before using derived class... does anyone know why I need to do this?

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• combine two GCC compiled .o object files into a third .o file

  - by ~lucian.grijincu

  How does one combine two GCC compiled .o object files into a third .o file? $ gcc -c a.c -o a.o $ gcc -c b.c -o b.o $ ??? a.o b.o -o c.o $ gcc c.o other.o -o executable If you have access to the source files the -combine GCC flag will merge the source files before compilation: $ gcc -c -combine a.c b.c -o c.o However this only works for source files, and GCC does not accept .o files as input for this command. Normally, linking .o files does not work properly, as you cannot use the output of the linker as input for it. The result is a shared library and is not linked statically into the resulting executable. $ gcc -shared a.o b.o -o c.o $ gcc c.o other.o -o executable $ ./executable ./executable: error while loading shared libraries: c.o: cannot open shared object file: No such file or directory $ file c.o c.o: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, not stripped $ file a.o a.o: ELF 32-bit LSB relocatable, Intel 80386, version 1 (SYSV), not stripped

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• MinGW linking problem

  - by Tobias Langner

  I have a linking problem with MinGW. These are the calls: g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -mthreads -Wl -Wl,-subsystem,windows -o debug/Simulation.exe debug/LTNetSender.o debug/main.o debug/simulation.o debug/moc_simulation.o -L'c:/Programmieren/Qt/4.5.2/lib' -lmingw32 -lqtmaind -LC:\Programmieren\Qt\boost_1_39_0\distrib\lib -LC:\Programmieren\MinGW\lib -llibboost_system-mgw34-mt -llibws2_32 -lQtSqld4 -lQtGuid4 -lQtNetworkd4 -lQtCored4 C:\Programmieren\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ ld.exe: cannot find -llibws2_32 The MinGW library directory is included in the library path and libws2_32.a is in this directory. Why isn't the linker finding the library?

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• Unresolved symbol when inheriting interface

  - by LeopardSkinPillBoxHat

  It's late at night here and I'm going crazy trying to solve a linker error. If I have the following abstract interface: class IArpPacketBuilder { public: IArpPacketBuilder(const DslPortId& aPortId); virtual ~IArpPacketBuilder(); // Other abstract (pure virtual methods) here... }; and I instantiate it like this: class DummyArpPacketBuilder : public IArpPacketBuilder { public: DummyArpPacketBuilder(const DslPortId& aPortId) : IArpPacketBuilder(aPortId) {} ~DummyArpPacketBuilder() {} }; why am I getting the following error when linking? Unresolved symbol references: IArpPacketBuilder::IArpPacketBuilder(DslPortId const&): ppc603_vxworks/_arpPacketQueue.o IArpPacketBuilder::~IArpPacketBuilder(): ppc603_vxworks/_arpPacketQueue.o typeinfo for IArpPacketBuilder: ppc603_vxworks/_arpPacketQueue.o *** Error code 1 IArpPacketBuilder is an abstract interface, so as long as I define the constructors and destructions in the concrete (derived) interface, I should be fine, no? Well it appears not.

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• How do I solve an unresolved external when using C++ Builder packages (with TForm based classes)?

  - by José Renato

  Hi, i'm working with Bulder C++ 6 and 2010, and i'm having this problem: http://stackoverflow.com/questions/2727001/how-do-i-solve-an-unresolved-external-when-using-c-builder-packages But, the difference here is that i'm using a FORM compiled inside the package, so, take the example above, but in addition i'm including a form classe, like TForm2: class TForm2 : public TForm { __published: // IDE-managed Components TButton *Button1; void __fastcall Button1Click(TObject *Sender); private: // User declarations public: // User declarations __fastcall TForm2(TComponent* Owner); }; //--------------------------------------------------------------------------- extern PACKAGE TForm2 *Form2; //--------------------------------------------------------------------------- So, when i'm trying to use this class in any project the linker stops and give me the unresolved external error. When i got that error i tried to include the word PACKAGE, like this: class PACKAGE TForm2 But, when i tried to compile the PACKAGE, the compiler stops with the unresolved external error: [ILINK32 Error] Error: Unresolved external '__fastcall Forms::TCustomForm::~TCustomForm()' referenced from c:\projects\UNIT2.OBJ How can i solve this problem? PS.: Sorry about the bad English.

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• xcode collect2: ld returned 1 exit status - how to resolve?

  - by Remover

  From what I have read this is supposed to be when the linker (not exactly sure how that works) can't find a symbol. the symbol in question is: SCNetworkReachabilityCreateWithAddress as can be seen from the full error message below. the thing is that the correct framework is added to my target. xcode recognises the symbol OK, i.e. there is no error message in the .m file. the .m file is added to the correct target so I'm not at all sure what to do. Any ideas please? "SCNetworkReachabilityCreateWithAddress", referenced from: -[AppWelcomeVC viewDidLoad] in AppWelcomeVC.o ld: symbol(s) not found collect2: ld returned 1 exit status

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• How to detect unresolved symbol when creating a library ?

  - by Simon

  Hello everyone, Under Solaris 10, I'm creating a library A.so that calls a function f() which is defined in library B.so. To compile the library A.so, I declare in my code f() as extern. Unfortunately, I "forgot" to declare in A's makefile that it has to link with B. However, "make A" causes no warning, no error, and the library A.so is created. Of course, when executing A's code, the call of f() crashes because it is undefined. Is there a way (linker option, code trick...) to make the compilation of library A fail ? How can I be sure that all symbols refered to in library A are defined at compile time ? Thanks for any suggestions.

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• How to link Cocoa static library to C command line target?

  - by Devara Gudda

  I have static library target, which uses Foundation classes(NSArray,etc) . I want to use this static library in Command line tool target. The command line tool contains only C files. From command line tool I want to call a method exported in static library. So I have modified header search path and linked the static library. When I compile the command line tool it is following linker errors. Undefined symbols: "_OBJC_CLASS_$_NSMutableArray", referenced from: "_objc_msgSend", referenced from: What is the method to link a static library which uses Foundation classes from a command line tool which contains C files? Regards Devara Gudda

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• How to make Visual C++ 9 not emit code that is actually never called?

  - by sharptooth

  My native C++ COM component uses ATL. In DllRegisterServer() I call CComModule::RegisterServer(): STDAPI DllRegisterServer() { return _Module.RegisterServer(FALSE); // <<< notice FALSE here } FALSE is passed to indicate to not register the type library. ATL is available as sources, so I in fact compile the implementation of CComModule::RegisterServer(). Somewhere down the call stack there's an if statement: if( doRegisterTypeLibrary ) { //<< FALSE goes here // do some stuff, then call RegisterTypeLib() } The compiler sees all of the above code and so it can see that in fact the if condition is always false, yet when I inspect the linker progress messages I see that the reference to RegisterTypeLib() is still there, so the if statement is not eliminated. Can I make Visual C++ 9 perform better static analysis and actually see that some code is never called and not emit that code?

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• Libxml2: undefined reference to xmlTextReaderConstName

  - by Dmitry

  I have installed the latest libxml2-2.8.0, as usual: $ ./configure, $ make, $ make install. The $ xml2-config --cflags --libs gives this output: -I/usr/local/include/libxml2 -L/usr/local/lib -lxml2 -lm But trying to compile any example... $ gcc `xml2-config --cflags --libs` xmltest.c The linker says: /tmp/cc8ezrPl.o: In function `processNode': xmltest.c:(.text+0x19): undefined reference to `xmlTextReaderConstName' xmltest.c:(.text+0x38): undefined reference to `xmlTextReaderConstValue' ...etc. Anything I've googled can be solved by xml2-config --cflags --libs flags, or upgrading to the latest version of libxml2, or something. Unfortunately, neither works for me. What can be the steps to identify the problem? Using Ubuntu 12.04 64-bit.

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• Unresolved External Symbol

  - by TomO

  I am working on wrapping a large number of .h and .lib files from native C++ to Managed C++ for eventual use as a referenced .dll in C#. I have the .lib files linked in and everything has been going smoothly so far. Upon wrapping the latest .h file, I hit a snag when 2 functions came back with the link error: error LNK2019: unresolved external symbol __imp__htonl@4 referenced in function "public: void __thiscall Field::setCharacter(unsigned char,int)" (?setCharacter@Field@@QAEXEH@Z) myutils.lib I have referenced "myutils.lib" in the linker options, so that shouldn't be the issue. What's strange is that I have about 20 functions in this particular .h file and all of the rest are linking just fine except for 3 functions. Any ideas?

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• OpenGL in Visual studio - Issues with GLEW

  - by BalsamicVinegar

  I'm currently following the openglbook.com tutorials (set up) (Tutorial) and have run into an issue fairly early on. I'm getting the following two errors: 1>main.obj : error LNK2019: unresolved external symbol __imp__glewGetErrorString@4 referenced in function _Initialize 1>main.obj : error LNK2019: unresolved external symbol __imp__glewInit@0 referenced in function _Initialize I have downloaded and compiled freeglut 2.8.0 as well as the glew 1.9.0 binaries. I have copied the libs and includes to C:\Program Files (x86)\Microsoft SDKs\Windows\v6.0A\Lib and Include respectively. The Lib and Include paths have also been added to my project properties under Additional Library/Include directories. I have also defined glew32.lib and freeglut.lib in my linker-Input-Additional dependencies. I have included and at the top of my main file. What am I missing? Every other thread I've found has been solved by adding the directories to the project properties. Does anyone have any ideas?

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• Preventing objects from being linked if they are not needed?

  - by Massif

  I have an ARM project that I'm building with make. I'm creating the list of object files to link based on the names of all of the .c and .cpp files in my source directory. However, I would like to exclude objects from being linked if they are never used. Will the linker exclude these objects from the .elf file automatically even if I include them in the list of objects to link? If not, is there a way to generate a list of only the objects that need to be linked?

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• Boost: Although compiled, missing lib

  - by Jonathan

  I've compiled Boost and am using it in a Visual C++ project. At some point, I started getting the following error: 1>LINK : fatal error LNK1104: cannot open file 'libboost_filesystem-vc100-mt-sgd-1_45.lib' AFAIK I have the linker configuration set correctly. I've searched for the lib and the closest I found was: libboost_filesystem-vc100-mt-gd-1_45.lib (Notice the missing 's') What does the missing 's' represent? What do these similar yet different libs stand for? How come I'm missing it although I've compiled all of Boost?

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• Linkage of namespace functions

  - by user144182

  I have a couple of methods declared at the namespace level within a header for a class: // MyClass.h namespace network { int Method1(double d); int Method2(double d); class MyClass { //... } } then defined in //MyClass.cpp int Method1(double d) { ... } int Method2(double d) { ... } This project compiles cleanly and is a dependency for a ui project which uses MyClass. The functions were previously member functions of MyClass, but were moved to namespace since it was more appropriate. My problem is the ui project complains when it gets to the linker: 1network.lib(MyClass.obj) : error LNK2001: unresolved external symbol "int __cdecl network::Method1(double)" (?INT@ds@sim@@YAHN@Z) 1network.lib(MyClass.obj) : error LNK2001: unresolved external symbol "int __cdecl network::Method2(double)" (?CINT@ds@sim@@YAHN@Z) What am I doing wrong?

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