MIPS Cross Compiler

Matt Welsford matt.welsford@dualogic.co.uk
Sun Oct 14 13:42:00 GMT 2001


> -----Original Message-----
> From: crossgcc-owner@sources.redhat.com
> [ mailto:crossgcc-owner@sources.redhat.com]On Behalf Of Ken Rose
> Sent: 13 October 2001 00:24
> To: matt.welsford@dualogic.co.uk
> Cc: crossgcc@sources.redhat.com; Matt Welsford
> Subject: RE: MIPS Cross Compiler
>
>
> On 12-Oct-01, Matt Welsford wrote:
> >Using the following invocation of the compiler:
> >
> >       $ mips-elf-gcc main.c crt0.S -nostdlib -I../include
> >
> >I get the following error:
> >
> >/cygdrive/c/WINNT/TEMP/ccEsdqTG.o: In function `main':
> >main.c(.text+0xc): undefined reference to `__main'
>
> It's the -nostdlib that's getting you.  __main is defined in libgcc.a, and
> --nostdlib tells the compiler to omit that from the link.
> Depending on the
> target, __main will run constructors and the like.
>
> Hope that helps,
>
>  - ken

Yip, that did help!

The reason I was using -nostdlib was so that I could reduce the number of
errors I was getting.  My first thought was that newlib had not built
correctly so I was trying to eliminate all possible sources of problems.
With your advice I see now that that opens a whole new can of worms.  In the
end, after a lot of tears, I found that with mips-gcc and the standard cross
build, you need to override the default linker script with one of the debug
stub monitor scripts, (-T).  As I'm not using a remote debug stub, I chose
the nullmon.ld script and Bob's your auntie my code compiled!

I am still to check the executable is valid!

Thanks for your help...

Cheers
Matt


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