[OpenRISC] newlib, malloc missing, I must be missing something

[OpenRISC] newlib, malloc missing, I must be missing something

[Dan]

Hello!

I just built the or1k tool suite according to the directions on
openrisk.io/newlib/building.html.  However, when trying to build my
first file, I'm getting:


% or1k-elf-gcc -O3 -o dhry.o -c dhry.c
% or1k-elf-ld -o dhry dhry.o
% or1k-elf-ld: warning: cannot find entry symbol _start; defaulting to
0000000000000000
dhry.o: In function `Func_2':
dhry.c:(.text+0x444): undefined reference to `strcmp'
dhry.o: In function `main':
dhry.c:(.text.startup+0x34): undefined reference to `malloc'
dhry.c:(.text.startup+0x48): undefined reference to `malloc'
dhry.c:(.text.startup+0x1e8): undefined reference to `strcmp'
dhry.c:(.text.startup+0x390): undefined reference to `exit'

However, if I just do the linking with GCC alone, I get:

% or1k-elf-gcc dhry.o -o dhry
% (No errors)

Any thoughts?

Thanks!

Dan
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[OpenRISC] newlib, malloc missing, I must be missing something

[Stefan Wallentowitz]

On 25.08.2016 16:01, Dan wrote:
> Hello!
> 
> I just built the or1k tool suite according to the directions on
> openrisk.io/newlib/building.html.  However, when trying to build my
> first file, I'm getting:
> 
> 
> % or1k-elf-gcc -O3 -o dhry.o -c dhry.c
> % or1k-elf-ld -o dhry dhry.o
> % or1k-elf-ld: warning: cannot find entry symbol _start; defaulting to

Hi,

can you try:

or1k-elf-gcc -o dhry dhry.o

Cheers,
Stefan


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[OpenRISC] newlib, malloc missing, I must be missing something

[Jeremy Bennett]

On 25/08/16 16:01, Dan wrote:
> Hello!
> 
> I just built the or1k tool suite according to the directions on
> openrisk.io/newlib/building.html.  However, when trying to build my
> first file, I'm getting:
> 
> 
> % or1k-elf-gcc -O3 -o dhry.o -c dhry.c
> % or1k-elf-ld -o dhry dhry.o
> % or1k-elf-ld: warning: cannot find entry symbol _start; defaulting to
> 0000000000000000
> dhry.o: In function `Func_2':
> dhry.c:(.text+0x444): undefined reference to `strcmp'
> dhry.o: In function `main':
> dhry.c:(.text.startup+0x34): undefined reference to `malloc'
> dhry.c:(.text.startup+0x48): undefined reference to `malloc'
> dhry.c:(.text.startup+0x1e8): undefined reference to `strcmp'
> dhry.c:(.text.startup+0x390): undefined reference to `exit'
> 
> However, if I just do the linking with GCC alone, I get:
> 
> % or1k-elf-gcc dhry.o -o dhry
> % (No errors)
> 
> Any thoughts?

Hi Dan,

The C compiler is a driver for the linker, putting in all the libraries
you need.  You should always link C code using gcc, not ld.

To see the link line used try gcc -v.  It will show you all the
sub-commands used.


Jeremy

> 
> Thanks!
> 
> Dan
> 
> 
> _______________________________________________
> OpenRISC mailing list
> OpenRISC at lists.librecores.org
> https://lists.librecores.org/listinfo/openrisc
> 


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