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Linker Error Undefined Reference


I hope I'll make it run. Instead, it means that the linker tried to create an executable and couldn't figure out where the main() function was located. This brings up another guiding principle of hunting down compiler errors: when in doubt, look earlier in the program. This was the problem but I also had to remove the "extern" keyword from "PS ps" in the header file. –frostbyyte Mar 6 '13 at 20:47 add a comment| up vote check my blog

ScruffR 2015-09-23 21:55:56 UTC #7 Just a stab in the dark, try to not name your main project file application.cpp (in Web IDE). D. If Linker find an external symbol in one static library he includes the symbol in output of the project.However if the library is shared( dynamic ) he doesn't includes the code The last bizarre type of linker error is a complain about an "undefined reference to main". http://stackoverflow.com/questions/14557657/linker-error-c-undefined-reference

Undefined Reference To C++ Error

Handling Cryptic or Bizarre Messages There are several types of compiler errors that are especially frustrating. I compiled the project (I also compiled every file it contains) and everything was ok, Done. If an entire library is included in a header file (and was compiled as C code); the include will need to be as follows; extern "C" { #include "cheader.h" } share|improve

All used member methods need to be defined if used. What examples are there of funny connected waypoint names or airways that tell a story? Cleaning your solution or re-creating your build configuration may fix build errors, but that doesn't mean there is a bug in the compiler. Undefined Reference Error In C A common mistake is forgetting to qualify the name: struct A { void foo(); }; void foo() {} int main() { A a; a.foo(); } The definition should be void A::foo()

share|improve this answer edited Feb 16 '15 at 8:31 M.M 72.2k662131 answered Sep 24 '12 at 23:38 Luchian Grigore 167k28295455 1 Further information for "templates must be defined in the Undefined Reference To Function C++ share|improve this answer answered Sep 10 '15 at 11:03 Plankalkül 412414 add a comment| up vote 1 down vote Clean and rebuild A "clean" of the build can remove the "dead Linker errors can also come about in functions that you have declared and defined if you fail to include all of the necessary object files in the linking process. This dual functionality is usually obtained through the use of a macro: #ifdef THIS_MODULE #define DLLIMPEXP __declspec(dllexport) #else #define DLLIMPEXP __declspec(dllimport) #endif The macro THIS_MODULE would only be defined in the

share|improve this answer edited Mar 4 '14 at 0:13 answered Mar 3 '14 at 23:52 πάντα ῥεῖ 55.4k852105 2 Can't help but point out this question and the fact that C++ Undefined Reference To Constructor Referee did not fully understand accepted paper What do you call "intellectual" jobs? Compare it closely to the definition you provided. And it builds and runs fine locally, I can program the device etc.

Undefined Reference To Function C++

And the id enum not being found. you could check here Not the answer you're looking for? Undefined Reference To C++ Error A single error near the top of your program can cause a cascade of other compiler errors because those lines might rely on something early in the program that the compiler C++ Undefined Reference To Class Get translation phase output $ g++ -S src1.cpp -o src1.s // src1.s look src1.s .file "src1.cpp" .local _ZL14local_var_name .comm _ZL14local_var_name,4,4 .globl global_var_name .data .align 4 .type global_var_name, @object .size global_var_name, 4

pso.o:pso.c:(.text+0x93): more undefined references to '_ps' follow This is my first time writing C code for gcc, so I'm unsure how to fix this problem. click site No Definition Probably the most common reason for unresolved reference errors is that you simply have not defined the thing you are referencing. Make sure every detail matches. I also had the same problem (with the same solution) for libxml2, libiconv and glew. Linking Error Undefined Reference To Function

under devcpp go to porject options and add this to linker options/additional libraries: -lopengl32 -lglu32 (i think ) (and of course you should also include proper header files ) [This message I admit this was a struggle. The error usually includes a function a value with a char or wchar_t derived type, these could include std::basic_string<> etc. news Just not on the web-IDE.

When the linker tries to create the entire program, it then complains that the implementation (toHash::insert(int, char)) cannot be found. Undefined Reference To C++ Linux Why would the end of the file be "unexpected"? That means you can't separate the definition of a template to an implementation file.

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share|improve this answer edited Aug 23 at 9:32 MvG 30.7k554138 answered Sep 24 '12 at 23:37 Luchian Grigore 167k28295455 add a comment| up vote 44 down vote The order in which Similar mechanism exist for other compilers/platforms. This is a tell-tale sign that the code was originally intended for both a UNICODE and a Multi-Byte Character (or "narrow") build. Undefined Reference To Static Variable C++ Things like this can happen because C and C++ syntax allows for things like declaring of a type immediately after the type definition: struct { int x; int y; } myStruct;

Cheers! In VC++, every source file (.cpp,.c,etc.) is considered as a translation unit, the compiler compiles one unit at a time, and generate one object file(.obj) for current translation unit. (Note that But it's a real question, so no closing. –Omnifarious Jan 28 '13 at 8:13 1 Sorry it's been almost a year since I last used c++. http://cdbug.org/undefined-reference/linker-error-undefined-reference-c.php So we get the error (slightly edited for clarity): a.cpp:(.text+0xc): undefined reference to `foo()' error: ld returned 1 exit status The way to fix it is to provide the definition: int

A typical giveaway for this problem is that a whole host of functions have multiple definitions. To correct this, build all the required libraries and projects with a consistent definition of UNICODE (and _UNICODE). Conclusion The unresolved reference error can have many causes, far from all of which have been described here. Look at the symbols $ readelf --symbols src1.o Num: Value Size Type Bind Vis Ndx Name 5: 0000000000000000 4 OBJECT LOCAL DEFAULT 4 _ZL14local_var_name # [1] 9: 0000000000000000 4 OBJECT GLOBAL