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POOdd duplicate symbol error in C
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  1. POOdd duplicate symbol error in C
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    copied!<p>Ok so i have a project, and i have some helper functions which need to be shared in various other files. call it Helper.c /.h , with the corresponding compilation flag to avoid multiple inclusion (#ifndef SymbolName #define Symbolname blah blahblah #endif). Every file has its header file in the following way:</p> <pre><code>#include .... #include .... #ifndef __FILENAME_H__ #define __FILENAME_H__ //in each file(FILENAME is replaced for the current file's name) declarations of functions, types, etc. #endif </code></pre> <p>I have a compare function, called dummyCompare (templates, so when creating a variable of this ADT, you need to supply your own function pointer for it to work, so for some cases i don't need a specific function, just a generic one, so that is what dummyCompare is. The error i get when compiling is:</p> <pre><code>gcc ./Helper.c ./LinkedList.c ./ABB.c ./AVL.c -Wall -lm -D DEBUG -g duplicate symbol _dummyCompare in: /var/folders/f2/nghjrbz915vbhjw_1gbb65sm0000gn/T//cc75R4sQ.o /var/folders/f2/nghjrbz915vbhjw_1gbb65sm0000gn/T//cc8jQwyE.o ld: 1 duplicate symbol for architecture x86_64 collect2: ld returned 1 exit status </code></pre> <p>List is used for a non-recursive solution for tree operations in ABB(ABB = BST in spanish)/AVL. Now using Sublime Text 2, i get the following search results for "dummyCompare"</p> <pre><code>Searching 8 files for "dummycompare" /dir/ABB.c: 81 if (abb != NULL) { 82 if (ABB_getRoot(*abb) != NULL){ 83: list = LL_newList(dummyCompare); 84 LL_insert(list, 1, ABB_getRoot(*abb)); 85 /dir/AVL.c: 67 if (avl != NULL) { 68 if (AVL_getRoot(*avl) != NULL){ 69: list = LL_newList(dummyCompare); 70 LL_insert(list, 1, AVL_getRoot(*avl)); 71 /dir/Helper.c: 2 3 /**************************************************************************** 4: * dummyCompare * 5 ***************************************************************************** 6 * Retorna si 2 dirrecciones son iguales, necesario para el funcionamiento * 7 * de la lista * 8 ****************************************************************************/ 9: int dummyCompare(void * a, void * b) 10 { 11 if (a == b) /dir/Helper.h: 4 5 int getMax(int a, int b); 6: int dummyCompare(void * a, void * b); 7 8 #endif 5 matches across 4 files </code></pre> <p>Thing is i can't seem to understand what is wrong, and why am I getting this error. Checked a lot of other question, and only answer i found was ("use #ifndef ... "), which I'm using</p>
 

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