Correct Linker Error
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Apple Mach-o Linker Error
programmers, just like you, helping each other. Join them; it only takes a minute: Sign up how to resolve Linker error in c++ when compiling the body of a class in Dev C++ [duplicate] up vote 1
Linker Error Undefined Reference To
down vote favorite This question already has an answer here: What is an undefined reference/unresolved external symbol error and how do I fix it? 25 answers I am trying to compile the body of a class that I got from my e-book after designing the header file but am getting this error message: [Linker error] c:/crossdev/src/mingw-w64-svn/mingw-w64-crt/crt/crt0_c.c:18: undefined reference to `WinMain@16' file: C:\Users\Chuks Joe\Desktop\collect2.exe Message:[Error] ld returned 1 exit status The header file is linker error undefined symbols for architecture x86_64 in a separate file called dice.h and the class body in another separate file called called dice.cpp. the client program is in a separate file too called testdice.cpp. Please help me with tips on how to arrange these files and where to put the so that they can all be linked together for my program to run. The compiler I am using is Dev-C++. c++ share|improve this question edited Mar 21 '13 at 18:39 Lightness Races in Orbit 216k34332581 asked Mar 21 '13 at 18:38 Chuks Joe Orjiakor 6112 marked as duplicate by Lightness Races in Orbit, Peter Wood, Javier, eandersson, p.s.w.g Mar 22 '13 at 0:39 This question was marked as an exact duplicate of an existing question. Dev-C++ is not a compiler –Lightness Races in Orbit Mar 21 '13 at 18:39 Just make sure you created the class correctly and on the top of the cpp add #include "dice.h" –Jona Mar 21 '13 at 19:00 @LightnessRacesinOrbit: Not a duplicate, this is a very specific instance where the issue is that the program is not "complete" in the sense that it has no main() or winMain() entry point. –Clifford Mar 21 '13 at 19:18 add a comment| 2 Answers 2 active oldest votes up vote 0 down vote Difficult to tell w
Fatal Errors Logic Errors Note that the error messages shown below may be specific to our compiler/linker or machines. Nonetheless, other systems and compilers will provide similar information. Compiler Messages When the compiler is
Linker Error Undefined Reference To __chkstk_ms'
compiling your code (i.e., converting your code into instructions the machine understands), it linker error duplicate symbol will report problems that it finds in your code. Aside: Here, we are being technical and refer to compiling as linker error undefined reference to winmain@16' dev c++ the stage before linking. Linking is when all the compiled pieces of a program and the libraries it uses (e.g., for cin) are put together to form an executable. Often, compiling and http://stackoverflow.com/questions/15555524/how-to-resolve-linker-error-in-c-when-compiling-the-body-of-a-class-in-dev-c linking together are just referred to as compiling. There are two severities of messages the compiler can give: Compiler Warnings A compiler warning indicates you've done something bad, but not something that will prevent the code from being compiled. You should fix whatever causes warnings since they often lead to other problems that will not be so easy to find. Example: Your code calls the pow() https://www.cs.bu.edu/teaching/cpp/debugging/errors/ (raise to a power) library function, but you forgot to include math.h. Because you've supplied no prototype for the pow() function (its in math.h), the compiler warns you that it assumes pow() returns an int and that it assumes nothing about pow()'s parameters: somefile.cpp:6: warning: implicit declaration of function `int pow(...)' This is a problem since pow() actually returns a double. In addition, the compiler can't type-check (and possibly convert) values passed to pow() if it doesn't know how many and what type those parameters are supposed to be. Note: The compiler will label warnings with the word warning so that you can distinguish them from errors. Compiler Errors A compiler error indicates something that must be fixed before the code can be compiled. Example: You forget a semi-colon (;) at the end of a statement and the compiler reports: somefile.cpp:24: parse error before `something' Always remember to fix the first few errors or warnings, since they may be causing all the rest. Compiler messages usually list the file and line number where a problem occurs. Nonetheless, errors often occur on the lines prior to what the error message lists. Especially check the line immediatel
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suggestions for errors that should be included in this document or have questions or suggestions for improving the document please email Mr. Frey Definitions Commonly used words and phrases found in the compiler and linker error messages. identifier -- the name of a class, struct, function or variable collect2: ld returned 1 exit status -- usually found as the last line of the error. This phrase indicates that you have a linker (ld) error, not a compiler error. Linker errors occur when g++ tries to combine all of your .o files into an executable file. Linker errors CANNOT be fixed by guarding header files or by changing which header files are included in your .cpp file. non-aggregate type -- classes and structs are generically called "aggregate" types. If you get an error indicating that your class is a "non-aggregate type", then the compiler has not seen your class definition and doesn't recognize your class as such. read-only structrure -- refers to a const object. This phrase is generally found in a compiler error when you are trying to change a data member in a const object. Compiler Errors undeclared identifier Example doy.cpp: In function `int main()': doy.cpp:25: `DayOfYear' undeclared (first use this function) doy.cpp:25: (Each undeclared identifier is reported only once for each function it appears in.) doy.cpp:25: parse error before `;' token Meaning You used "DayOfYear" in your code, but the compiler has not seen a definition for "DayOfYear". It doesn't know what "DayOfYear" is. Usual Causes You forgot to include the header file that defines the class/struct/function/etc You misspelled the name of the identifier cout undeclared Example xyz.cpp: In function `int main()': xyz.cpp:6: `cout' undeclared (first use this function) xyz.cpp:6: (Each undeclared identifier is report