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Undefined Reference To Main Gcc

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Browse other questions tagged c++ or ask your own question. The form is int main(void) { ...; return 0; } Any thoughts on why I might get this error? No Definition Probably the most common reason for unresolved reference errors is that you simply have not defined the thing you are referencing. The time now is 12:49 AM. http://cygnussoft.com/undefined-reference/lex-yy-c-undefined-reference-to-yywrap.html

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 A good text editor that performs syntax highlighting and automatic indentation should help fix some of these issues by making it easier to spot problems when writing code. If those answers do not fully address your question, please ask a new question. 1 That's not a compiler error. –chris Jan 28 '13 at 7:56 1 -1 for c linker share|improve this question edited Apr 9 '13 at 14:53 unwind 255k38332460 asked Apr 9 '13 at 14:47 Nicole 3402514 is this function at global scope? –Ivaylo Strandjev

Undefined Reference To Main Gcc

Find More Posts by deiussum 11-23-2005, 02:37 PM #9 pplppp LQ Newbie Registered: Jul 2004 Posts: 3 Rep: what is the command you use to run gcc (what options if you don't have this main function, ld will report "undefined reference to main' " check my result: $ cat es3.c #include int main(void) { printf("Hello world!\n"); return 0; } Converting Game of Life images to lists Sieve of Eratosthenes, Step by Step Why does Mal change his mind?

If you are writing C++ make sure you are using g++ to link rather than gcc. You are currently viewing LQ as a guest. Browse other questions tagged c gcc reference or ask your own question. Undefined Reference To Main Makefile I'm courious, what has happened to 'argc' and 'argv'?

c++ reference undefined share|improve this question edited Aug 15 '14 at 14:37 user263210 3212 asked Jan 28 '13 at 7:52 Fox 102118 marked as duplicate by Andrey, BЈовић, EdChum, Shoban, Sindre Undefined Reference To Main In Function _start How do you curtail too much customer input on website design? When the linker tries to create the entire program, it then complains that the implementation (toHash::insert(int, char)) cannot be found. check it out This error is fixed by enclosing your code for the case inside of braces.

What this really means is that you've done something that the compiler cannot understand. Undefined Reference To Main Error In C The first step compiles to object files. asked 3 years ago viewed 28955 times active 3 years ago Related 1798What are the differences between a pointer variable and a reference variable in C++?737Undefined behavior and sequence points2c++ linux Of course, I'm assuming you use a GNU/Linux system (and I invite you to use GNU/Linux if you don't use it already).

Undefined Reference To Main In Function _start

Post your question and get tips & solutions from a community of 418,582 IT Pros & Developers. http://www.cprogramming.com/tutorial/compiler_linker_errors.html Woops. –Nicole Apr 9 '13 at 15:05 Or just remove the -o option and use the conventional ./a.out, which is a beautiful name ;) –Tomasz Gandor Aug 5 '14 Undefined Reference To Main Gcc Even the first compiler error you get might be due to something several lines before the indicated warning. Undefined Reference To Main C++ Linker 101 To understand the linker, you have to understand how C++ programs are built.

Generally, these errors will be of the form "could not find definition for X". this content I'm pretty green when it comes to programming AVRs. If you have included such a definition, post it, and we can take a look. Nevertheless, compiler warnings aren't going to stop you from getting your program working (unless you tell your compiler to treat warnings as errors), so they're probably a bit less frustrating than Undefined Reference To Main G++

It doesn't know what "DayOfYear" is. Linker errors, unlike compiler errors, have nothing to do with incorrect syntax. share|improve this answer edited Nov 2 '11 at 7:58 answered Nov 1 '11 at 13:58 Basile Starynkevitch 123k895203 yes i'm using Ubuntu! weblink Conclusion The unresolved reference error can have many causes, far from all of which have been described here.

Does flooring the throttle while traveling at lower speeds increase fuel consumption? Undefined Reference To Main Assembly Code: gcc -c file1.c -o file1.o gcc -c file2.c -o file2.o gcc file1.o file2.o -o executable or just gcc file1.c file2.c -o executable This differs from Java, where you can just Find More Posts by Dave Kelly 11-19-2005, 07:31 PM #8 deiussum Member Registered: Aug 2003 Location: Santa Clara, CA Distribution: Slackware Posts: 895 Rep: I'm guessing your main is

Join them; it only takes a minute: Sign up Linker Error C++ “undefined reference ” [duplicate] up vote 9 down vote favorite 2 Possible Duplicate: What is an undefined reference/unresolved external

When using the g++ frontend, you can do this by specifying all the source files together on the command line. It keeps popping up the following error: /usr/lib/gcc/i386-redhat-linux/4.0.0/../../../crt1.o(.text+0x18): In function `_start': : undefined reference to `main' collect2: ld returned 1 exit status This happens whether I compile the code using a more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed In Function Start Undefined Reference To Main share|improve this answer edited Nov 1 '11 at 11:05 answered Nov 1 '11 at 10:59 Blagovest Buyukliev 30.7k865106 2 the problem is that I put the main function inside my

Why would the end of the file be "unexpected"? More cryptic was another error message from the same compilation attempt: "extraneous 'int' ignored". Why won't a series converge if the limit of the sequence is 0? check over here How can the compiler know this at all?