/* Building cross compiler for Xscale platform(iPAQ H3975) - Installation Log */
/* Author - Adinarayanan Venkatachalam (avenkat2@unity.ncsu.edu)*/
/* Use at your own risk */

1) Get the latest stable versions of binutils, gcc and glibc from ftp.gnu.org/pub/gnu

In my case these are:
binutils-2.13.1.tar.gz
gcc-3.2.tar.gz
glibc-2.3.1.tar.gz

2) Gunzip and untar them to your src/ directory.

In my case :
cd /root/ipaq/src
tar zxvf <substitute the above files>

3) Create your build directory.

mkdir /root/ipaq/build
cd /root/ipaq/build
mkdir binutils-2.13.1 gcc-3.2 glibc-2.3.1

4) Choose your --prefix, --target and --host and configure binutils.

cd binutils-2.13.1
/root/ipaq/src/binutils-2.13.1/configure --target=arm-linux --prefix=/root/ipaq/local --host=i386
make
make install

5) Build GCC - first pass. 

cd /root/ipaq/src/gcc-3.2/gcc/config/arm

vi t-linux

Add -Dinhibit_libc -D__ghtr_posix_h to TARGET_LIBGCC2_CFLAGS

cd /root/ipaq/build/gcc-3.2/

/root/ipaq/src/gcc-3.2/configure --target=arm-linux --host=i386-pc-linux-gnu --prefix=/root/ipaq/local --disable-threads --with-cpu=xscale --enable-languages=c

make

/* errors and their solutions */

/root/ipaq/local/arm-linux/bin/ld: cannot open crtn.o: No such file or directorycollect2: ld returned 1 exit status
/root/ipaq/local/arm-linux/bin/ld: cannot open crti.o: No such file or directorycollect2: ld returned 1 exit status
/root/ipaq/local/arm-linux/bin/ld: cannot find -lc

solutions:
cp /root/skiff/local/arm-linux/lib/crtn.o ../../local/lib/gcc-lib/arm-linux/3.2/
cp /root/skiff/local/arm-linux/lib/crti.o ../../local/lib/gcc-lib/arm-linux/3.2/
cp /root/skiff/local/arm-linux/lib/libc.a ../../local/lib/gcc-lib/arm-linux/3.2/

Comments:
You have to install arm-linux-toolchain-current.tar.gz from ftp.handhelds.org in /root. It automatically installs to /skiff/local

6) Building glibc:

cd /root/ipaq/build/glibc-2.3.1/

/root/ipaq/src/glibc-2.3.1/configure arm-linux --build=i386-pc-linux-gnu --prefix=/root/ipaq/local/arm-linux --enable-add-ons=linuxthreads

/* comment: i guess crypt is in-built, so need for --enable-add-ons option - crypt*/

make

/* error */
../sysdeps/unix/syscall.S: Assembler messages:
../sysdeps/unix/syscall.S:28: Error: cannot represent SWI relocation in this object file format

/* comments : maybe it is finding the wrong version of asm/unistd.h */
In /root/ipaq/src/glibc-2.3.1/Makerules
line#73 add the following

-I/root/ipaq/local/arm-linux/include

so that +sysdep-includes becomes 

+sysdep-includes := $(addprefix -I,$(+sysdep_dirs)) -I/root/ipaq/local/arm-linux/include

/* error */

/root/ipaq/local/arm-linux/include/asm/param.h:13:45: asm/arch/param.h: No such file or directory
/root/ipaq/local/arm-linux/include/asm/param.h:14:57: asm/proc/page.h: No such file or directory
make[2]: *** [/root/ipaq/build/glibc-2.3.1/misc/efgcvt.o] Error 1

/* solution */
cd /root/ipaq/local/arm-linux/include/asm
ln -s ./arch-pxa ./arch
ln -s ./proc-armv ./proc

/* error */

cpp0: warning: changing search order for system directory "/root/ipaq/local/arm-linux/include"
cpp0: warning:   as it has already been specified as a non-system directory
<stdin>: Assembler messages:
<stdin>:2: Error: cannot represent SWI relocation in this object file format
make[2]: *** [/root/ipaq/build/glibc-2.3.1/misc/fgetxattr.o] Error 1



NOTES:
I followed the document - HOWTO Build a Cross Toolchain in Brief - that can be found at the handhelds.org wiki page.