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POclang Linker fails if at least -O2 wasn't used
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  1. POclang Linker fails if at least -O2 wasn't used
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    copied!<p>I've an strage behaviour in a simple C code that I'm doing for educational purposes.</p> <p>If I compile it with something lower than -O2 it breaks during link-edition with this output.</p> <pre><code>$ make clang -Wall -march=native -pipe -c -g -D_DEBUG_ main.c clang -Wall -march=native -pipe -c -g -D_DEBUG_ functions.c clang -Wall -o main main.o functions.o Undefined symbols for architecture x86_64: "_getbit", referenced from: _getValueFromMatrix in functions.o "_setbit", referenced from: _populateMatrix in functions.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) make: *** [main] Error 1 </code></pre> <p>I don't know if this helps but, here are the implementation of setbit(); and getbit();</p> <pre><code>inline void setbit(uint64_t *inteiro, unsigned char pos) { *(uint64_t*)inteiro |= (uint64_t)1 &lt;&lt; pos; } inline bool getbit(uint64_t inteiro, unsigned char pos) { return (inteiro &amp; ((uint64_t)1 &lt;&lt; pos)); } </code></pre> <p>EDIT:</p> <p>functions.h</p> <pre><code>#ifndef __FUNCTIONS_H__ #define __FUNCTIONS_H__ /* Funções para manipulação de bits */ inline void setbit(uint64_t *, unsigned char); inline void clearbit(uint64_t *, unsigned char); inline bool getbit(uint64_t, unsigned char); inline unsigned char getbitChar(uint64_t, unsigned char); char *uint64_t2bin(uint64_t, char *, int); #endif </code></pre> <p>Includes in main.c</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;stdint.h&gt; #include &lt;stdbool.h&gt; #include &lt;string.h&gt; #include "errors.h" #include "const.h" #include "types.h" #include "functions.h" </code></pre>
 

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