new warning with 2.19

Joel Sherrill joel.sherrill@oarcorp.com
Wed Dec 3 14:20:00 GMT 2008

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Hi,

When linking executables for a number of RTEMS
targets, we get a message like this which
did not appear with 2.18:

/opt/rtems-4.10/lib/gcc/powerpc-rtems4.10/4.3.2/../../../../powerpc-rtems4.10/bin/ld: 
warning: cannot find entry symbol _start; defaulting to 00000000

We include -e _start on the ld command line.

The symbol _start is in an assembly file and
is indeed in the executable:

-bash-3.2$ grep _start `find . -name hello.num`
0000016c T _start

It is defined in an assembly file as this:

    .globl    _start
    .type    _start,@function
_start:

The file "start.o" is the first file linked.

The resulting executables do run.

Is there something wrong with the check that generates
this warning? 

I have tried to produce a cutdown but so far have not
had any luck. 

Suggestions appreciated.  We are investigating updating
the binutils for the release branch of RTEMS and this
is a sticker.

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill@OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985

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