Error Redefinition In C
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Error Redefinition Of ‘class
errors in .h files up vote 6 down vote favorite //list.h file typedef struct _lnode{ struct _lnode *next; size_t row; size_t column; short data; }lnode; typedef struct _llist{ struct _lnode *head; size_t size; }llist; //matrix.h file typedef struct _matrix{ size_t width; size_t height; size_t k; int **data; }matrix; //smatrix.h file #include "list.h" #include "matrix.h" typedef struct _smatrix{ size_t width; size_t height; size_t k; llist error redefinition of ‘struct data; }smatrix; smatrix* make_smatrix(matrix *m); smatrix.h file includes list.h file and matrix.h files. If I include those header files in smatrix.h file then I get redefinition of 'lnode'. redefinition of '_llist' and redefinition of '_matrix' errors. If I took those heder files our from smatrix.h file then the error went away but it complains about matrix type in the function parameter. I want to call functions defined in list.h and matrix.h files in smatrix.c file.. What do I do? Thanks in advance.. c share|improve this question edited Apr 29 '15 at 17:48 BartoszKP 22.4k84167 asked Mar 25 '11 at 8:18 LCYSoft 3,2941160116 add a comment| 4 Answers 4 active oldest votes up vote 12 down vote accepted Possible problem of multiple inclusions. Try to guard your header files with file list.h #ifndef _LISTH_ #define _LISTH_
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Error Redefinition Of Default Argument
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Error Redefinition Of Typedef 'glistmodel'
the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up GCC compiler error: “redefinition…previously defined” http://stackoverflow.com/questions/5430019/redefinition-errors-in-h-files up vote 7 down vote favorite 3 I'm getting a lot of " redefinition of x....x previously defined here". Please what does this error means? c++ gcc compiler-construction share|improve this question asked Apr 2 '09 at 1:00 caesar add a comment| 3 Answers 3 active oldest votes up vote 20 down vote You need to limit each file from being included only once. You can do http://stackoverflow.com/questions/707920/gcc-compiler-error-redefinition-previously-defined this in 2 ways. 1) At the top of your header files put: #pragma once Or 2) if your compiler doesn't support that, put at the top/end of your header files: #ifndef _MYFILE_H_ #define _MYFILE_H_ ... #endif Replace MYFILE with the name of your file, and replace ... with the contents of the header file. share|improve this answer edited Apr 2 '09 at 7:11 unwind 254k38331460 answered Apr 2 '09 at 1:18 Brian R. Bondy 198k82474572 1 I think that #pragma only works in VC++, not in gcc. The #define trick is portable. –Gorpik Apr 2 '09 at 7:19 supoprted by gcc and vc++ –Brian R. Bondy Apr 2 '09 at 10:29 Wikipedia says #pragma once is supported by VC++ and gcc en.wikipedia.org/wiki/Pragma_once . –Max Lybbert Apr 3 '09 at 20:48 #pragma works fine with gcc.. I'm using it at this very moment after I reading about it and it solved a ton of errors! –mmoment Sep 7 '12 at 14:13 add a comment| up vote 9 down vote The error means that there is a symbol that has been defined in one place and an alternate defin
last months will be deleted periodically to fight SPAM! Home Help Search Login Register Wiki Code::Blocks » User forums » General (but related to Code::Blocks) » Error: redefinition of function « previous next » Send http://forums.codeblocks.org/index.php?topic=20798.0 this topic Print Pages: [1] Go Down Author Topic: Error: redefinition of function (Read http://www.microchip.com/forums/m765782.aspx 1728 times) Phrosen Single posting newcomer Posts: 7 Error: redefinition of function « on: December 21, 2015, 06:14:55 pm » I have a problem that I think is related to my IDE. I am using Codeblocks (13.12).Here's my "set up":main.c (includes 'int main()')header.h (your typical header, includes prototypes)test.c (a random file, includes custom-made functions.)Here's the issue: All the functions error redefinition works as intended, but when I compile my test.c I get an error (for each function) saying: "error: redefinition of ***"This issue doesn't affect anything, but it's annoying. I'm wondering if it's possible to get rid of it somehow? Maybe I'm doing something wrong when I'm creating my prototypes?Here's an example of what my functions and prototypes look like:Code: [Select]void func_showMenu(); //This is the prototype, in header.h
void func_showMenu(){
//This is error redefinition of the function, in test.c
}Is there some setting in Code::Blocks that can fix this issue? Logged headkase Almost regular Posts: 129 Re: Error: redefinition of function « Reply #1 on: December 21, 2015, 07:26:33 pm » Please post the complete contents of both your header and source files. If each function pair is the same then one complete pair will suffice. Make sure to include the boiler-plate code like the: define that is supposed to be in a header. « Last Edit: December 21, 2015, 07:28:07 pm by headkase » Logged stahta01 Lives here! Posts: 5393 Re: Error: redefinition of function « Reply #2 on: December 21, 2015, 09:28:05 pm » Post the complete header file; likely you did NOT guard it correctly.Edit: read this site rules. http://forums.codeblocks.org/index.php/topic,9996.0.htmlAlso, Post a full build log in code tags.Tim S. « Last Edit: December 21, 2015, 09:30:02 pm by stahta01 » Logged C Programmer working to learn more about C++ and Git.On Windows 7 64 bit and Windows 10 32 bit.On Debian Testing, compiling CB Trunk against wxWidgets 3.0.2.--When in doubt, read the CB WiKi FAQ. http://wiki.codeblocks.org Phrosen Single posting newcomer Posts: 7 Re: Error: redefinition of function « Reply #3 on: December 27, 2015, 12:42:29 pm » I created a few test files to show the error:Here's main.c:Code: [Select]#in
Visited Search Results View More Blog Recent Blog Posts View More PMs Unread PMs Inbox Send New PM View More Page Extras Menu Forum Themes Elegant Mobile Home » All Forums » [Development Tools] » MPLAB XC8 » Problems compiling Mark Thread UnreadFlat Reading Mode❐ LockedProblems compiling Author Post Essentials Only Full Version si2030 Starting Member Total Posts : 54 Reward points : 0 Joined: 2006/10/19 05:59:08Location: Bendigo Australia Status: offline 2013/12/16 05:39:13 (permalink) 0 Problems compiling Hi There, I am quite new to XC8 and I have been writing code to operate an HD44780 LCD. I have the basic functions like initialisation, LCDBusy, sendCommand, writeString etc. when I compile I get the error function undefined. Here is the build printout :: warning: Omniscient Code Generation not available in Free mode(908) exit status = 1make[2]: *** [dist/default/production/LCD_LIBRARY.X.production.hex] Error 1 make[1]: *** [.build-conf] Error 2 make: *** [.build-impl] Error 2 LCD_Library.c:140: error: function "_LCDBusy" redefined LCD_Library.c:167: error: function "_sendCommand" redefined LCD_Library.c:237: error: function "_LCDInitilisation" redefined LCD_Library.c:350: error: function "_sendData" redefined LCD_Library.c:416: error: function "_LCDWriteString" redefined make[2]: Leaving directory `C:/Users/Simon/MPLABXProjects/LCD_LIBRARY.X 'make[1]: Leaving directory `C:/Users/Simon/MPLABXProjects/LCD_LIBRARY.X'BUILD FAILED (exit value 2, total time: 9s) Its giving the same error for all my functions. Why is it and how do I fix it? I have included the header file the function file and a quick and dirty test_main file. Hope some one can help. Kind Regards Simon Attachment(s)LCD_Header.h (6.43 KB) - downloaded 572 times LCD_Library.c (17.38 KB) - downloaded 468 times LCD_TEST_MAIN.c (1.10 KB) - downloaded 482 times #1 11 Replies Related Threads User2009 Super Member Total Posts : 158