XScale Cygwin Newlib 1.10 application build issues.

[Ben Bodley]

Gidday all,


I've built a simple toolchain for Xscale development on a custom board (no
OS). 


binutils build:

../binutils-20021117-1/configure --host=i686-pc-cygwin --target=xscale-elf
--prefix=/xscale --norecursion

gcc build:

../gcc-3.2-3/configure
--with-gcc-version-trigger=/usr/src/gcc-3.2-3/gcc/version.c
--host=i686-pc-cygwin --enable-languages=c,c++ --with-included-gettext
--enable-shared --enable-threads --target=xscale-elf --with-newlib
--prefix=/xscale -v --norecursion

newlib build:

../newlib-1.10.0/configure --host=i686-pc-cygwin --target=xscale-elf
--prefix=/xscale -v --norecursion


These commands created a simple xscale toolchain, and when I compile a
program all is well. The problem is I have not provided my own sbrk(),
open(), etc functions! The program itself works on the target, but I need to
provide a custom sbrk() implementation to fix a dynamic memory allocation
issue with our hardware.

I have added sbrk(), open(), getpid(), etc functions into a platform layer,
and they are compiled in, but the newlib malloc() is not calling my sbrk()
implementation.. 


What am I forgetting here???? Thankyou for any assistance.


Cheers,

Ben

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