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POHow to resolve crt0.o linking issue in cross compiling?
 

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  1. POHow to resolve crt0.o linking issue in cross compiling?
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    <p>How to add <code>ctr0.o</code> ? </p> <p>I get this error:</p> <pre><code>yagarto-4.7.2/bin/arm-none-eabi-ld: cannot find crt0.o: No such file or directory collect2: error: ld returned 1 exit status` </code></pre> <p>while compiling very simple program from <a href="http://thinkingeek.com/2013/01/09/arm-assembler-raspberry-pi-chapter-1/" rel="noreferrer">here</a>:</p> <pre><code>/* -- first.s */ /* This is a comment */ .global main /* 'main' is our entry point and must be global */ .func main /* 'main' is a function */ main: /* This is main */ mov r0, #2 /* Put a 2 inside the register r0 */ bx lr /* Return from main */ </code></pre> <p>I have seen these 2 threads and didn't get any full and straight forward answer:</p> <ol> <li><a href="http://www.raspberrypi.org/phpBB3/viewtopic.php?t=50046" rel="noreferrer">http://www.raspberrypi.org/phpBB3/viewtopic.php?t=50046</a></li> <li><a href="https://stackoverflow.com/questions/16981704/what-is-the-rationale-behind-removing-crt0-o-from-gcc4-7-x">What is the rationale behind removing crt0.o from gcc4.7.x?</a></li> </ol> <p>I have these files, what is the difference between crt0 and crtn can't I use it?</p> <pre><code>./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/crtbegin.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/crtend.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/crti.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/crtn.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/crtbegin.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/crtend.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/crti.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/crtn.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/v6m/crtbegin.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/v6m/crtend.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/v6m/crti.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/v6m/crtn.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/v7m/crtbegin.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/v7m/crtend.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/v7m/crti.o ./yagarto-4.7.2/lib/gcc/arm-none-eabi/4.7.2/thumb/v7m/crtn.o </code></pre> <p>The SO solution gives a workaround which doesn't work either:</p> <pre><code>arm-none-eabi-gcc -o first assembler_tutorial/chapter01/first.o -nostartfiles ./yagarto-4.7.2/bin/arm-none-eabi-ld: warning: cannot find entry symbol _start; defaulting to 0000000000008000 </code></pre>
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