gcc vs CodeBlocks compiler

Hello All:

Is there a difference between compilers in 'CodeBlocks' and with the general 'gcc' compiler?

I have a program that compiles fine in 'CodeBlocks' the c-programming editor that I use, and then when I compile using gcc in a unix enviroment it will throw errors.

Any input?

Thanks

CodeBlocks is an IDE, not a compiler. It could well be configured to use this "general 'gcc' compiler", and the problem might lie in an incorrect invocation of "gcc in a unix enviroment".

Or, maybe the errors are due to something platform specific, e.g., you are using CodeBlocks on Windows, and then are using Windows specific stuff.

Well in my code, I have a header file. When I compile in 'CodeBlocks'; it compiles without error, and the program runs as usual, but then I compile using gcc in a unix enviroment like I said, and it seems the

Code:

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struct

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method that I clearly declared in the main program isn't declared.

Could I post my code and error message?

Quote:

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Originally Posted by CDdotdot47

Could I post my code and error message?

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Yes.

By the way, on a hunch: make sure that you are compiling as C in both cases. You might be say, compiling as C++ instead.

Hi:

Thank you.

Attached is my source file plus my header file.
tv2.c is the main file and mytrace.h is the header.

Below is the error code that I am getting when I compile with gcc:

Code:

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bash-2.05$ gcc tv2.c
tv2.c: In function `trace_init':
tv2.c:21: error: `trace_item' undeclared (first use in this function)
tv2.c:21: error: (Each undeclared identifier is reported only once
tv2.c:21: error: for each function it appears in.)
tv2.c:21: error: parse error before ')' token

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I checked my compiler settings in 'CodeBlocks' and it says it is set to GNU GCC Compiler.

Thanks for helping with this.

C requires that you use struct trace_item, not just trace_item.

Code:

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trace_buf=(trace_item*)malloc(sizeof(struct trace_item) * TRACE_BUFSIZE);

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and there is no need for the cast of the return value of malloc ANYWAY.

IOW: Laserlight nailed it.

Ok I tried what you said and now i'm getting this error:

Code:

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bash-2.05$ gcc tv2.c
Undefined                      first referenced
 symbol                            in file
log                                /var/tmp//ccCa68F0.o
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status
bash-2.05$

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You presumably used the log function from <math.h>. You may need to pass -lm as an option to gcc.

okay it compiled now with GCC.

So how do I configure CodeBlocks to compile the same as GCC?

Now when i re-compile the same code in CodeBlocks, I get like a million errors.