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Altera_Forum's avatar
Altera_Forum
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20 years ago

multiple definition of `_start'

Hello members of the forum... I am new working with Nios and programming applications C/C++ for that reason I please need the aid an expert who knows, wants and can help me to solve the errors of my small application of test,

The application:# include <stdio.h>

int main(void){

printf("\nThis is a test of the application CPP2...bye\n");

return 0;

}

The error:

make -k all

no emulation specific options.

nios2-elf-gcc -msys-crt0="c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/lib/crt0.o -r -d -L"c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/lib -o cpp2.bin cpp2.o /cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../nios2-elf/lib/libm.a /cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/libgcc.a "c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/lib/libc.a

cpp2.o(.text+0x0): in function `_start&#39;:

: multiple definition of `_start&#39;

c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0/lib/crt0.o(.text+0x0): first defined here

collect2: ld returned 1 exit status

make: *** [cpp2.bin] Error 1

make: Target `all&#39; not remade because of errors.

I will thank for the aid of an expert who has knowledge about how to solve this problem.

13 Replies

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    Thanks, I tried out your elf2flt_ld script. I didn&#39;t patch it. Now the linker is getting some undefined references.... 

    nios2-linux-uclibc-g++ hello.cpp -o hello -elf2flt="-s 64000"
hello.elf2flt(.text+0xc964): In function `__uClibc_fini&#39;:
: undefined reference to `__fini_array_start&#39;
hello.elf2flt(.text+0xc968): In function `__uClibc_fini&#39;:
: undefined reference to `__fini_array_start&#39;
hello.elf2flt(.text+0xc96c): In function `__uClibc_fini&#39;:
: undefined reference to `__fini_array_end&#39;

    I didn&#39;t try to execute it, &#39;cos it would probably crash anyway.

    Any thoughts?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    There are two versions of uClibc that we are talking about.

    20060207 or 20060208, the older one, use the elf2flt.ld from elf2flt_ld.zip.

    20060214 or later, the newer one with fini_array, use the patches which I post to busybox.

    But both will crash on libstdc++. I made the patches from normal elf ldscript. Maybe you can try to trace it out.