Hello,
You'll find below the build procedure we have used to make a gcc big endian
cross toolchain for Intel IXP2400 which contains an ARM XScale core. I think
this procedure is valid for any ARM target.
We hope it will help others.
Best regards,
david
--begin--
Howto make the GCC big endian toolchain for IXP2400/Linux (ARM XScale
core)
=====================================================================
Version 1.3 / 2003-05-07
David MENTRE
Mathieu BERTRAND
-1. Last update
With below procedure, the gcc is usable in -static but cannot produce
dynamic linked programs. More exactly, the glibc-2.2.3 used in the
ixp_ramdisk.gz should be replaced by glibc-2.2.5. 2.2.5 version has
been patched to work with gcc3.
0. Used software
- binutils-2.12.1.tar.gz
- gcc-3.2.2.tar.gz
- glibc-2.2.5.tar.gz
- glibc-linuxthreads-2.2.5.tar.gz
- gdb-5.3.tar.gz
(Those packages can be found on ftp.gnu.org mirrors.)
- sources of patched linux kernel for IXP2400. linux-2.4.19-rmk7-ds1
is working for us (YMMV)
(Linux sources can be found at:
http://www.kernel.org/pub/linux/kernel/v2.4/
Russel King patches can be found at:
http://www.arm.linux.org.uk/developer/v2.4/
Deepak Saxena patches can be found at:
ftp://source.mvista.com/pub/ds-patches/2.4
)
1. Compilation overview
One will need to do the following steps :
- setup destination directory and apply needed patches to sources
- compile the binutils
- compile a bare-bone gcc (for big endian)
- compile the glibc
- re-compile a complete gcc (for big endian)
- compile gdb
2. packages installation
* In /usr/local/src (or whatever directory you choose):
- mkdir build-binutils
- mkdir build-gcc
- mkdir build-glibc
- mkdir build-gcc2
- mkdir build-gdb
- tar xvf binutils-2.13.tar.gz
- tar xvf gcc-3.2.1.tar.gz
- tar xvf glibc-2.2.3.tar.gz
- cd glibc-2.3.3; tar xvf glibc-linuxthreads-2.2.3.tar.gz; cd ..
- tar xvf gdb-5.3.tar.gz
* Patch glibc:
- cd glibc-2.2.5
- perl -pi -e 's/weak_alias \(__old_sys_nerr/\/\/ $&/'
sysdeps/unix/sysv/linux/arm/errlist.c
- cd ..
* Patch gcc:
- cd gcc-3.2.2
- perl -pi -e 's/^(TARGET_LIBGCC2_CFLAGS.*)/$1 -Dinhibit_libc
-D__gthr_posix_h/' gcc/config/arm/t-linux
- echo 'T_CFLAGS = -Dinhibit_libc -D__gthr_posix_h' >>
gcc/config/arm/t-linux
edit Makefile.in and rewrite xgcc in xgcc -mbig-endian on definition
GCC_FOR_TARGET:
GCC_FOR_TARGET = $$r/gcc/xgcc -mbig-endian -B$$r/gcc/ $(FLAGS_FOR_TARGET)
edit gcc/Makefile.in and rewrite xgcc in xgcc -mbig-endian on
definition:
GCC_FOR_TARGET = ./xgcc -mbig-endian -B./ -B$(build_tooldir)/bin/ -isystem
$(build_tooldir)/include -isystem $(build_tooldir)/sys-include
apply following patch to gcc/reload1.c with
- cd gcc; patch -l < the-patch.patch; cd ..
=== start of patch ===
--- reload1.c.orig Thu Oct 10 16:40:20 2002
+++ reload1.c Thu Dec 12 14:43:56 2002
@@ -8674,7 +8674,9 @@
... (MEM (PLUS (REGZ) (REGY)))... .
First, check that we have (set (REGX) (PLUS (REGX) (REGY)))
- and that we know all uses of REGX before it dies. */
+ and that we know all uses of REGX before it dies.
+ Also, explicitly check that REGX != REGY; our life information
+ does not yet show whether REGY changes in this insn. */
set = single_set (insn);
if (set != NULL_RTX
&& GET_CODE (SET_DEST (set)) == REG
@@ -8684,6 +8686,7 @@
&& GET_CODE (SET_SRC (set)) == PLUS
&& GET_CODE (XEXP (SET_SRC (set), 1)) == REG
&& rtx_equal_p (XEXP (SET_SRC (set), 0), SET_DEST (set))
+ && !rtx_equal_p (XEXP (SET_SRC (set), 1), SET_DEST (set))
&& last_label_ruid < reg_state[REGNO (SET_DEST (set))].use_ruid)
{
rtx reg = SET_DEST (set);
=== end of patch ===
This patch comes from following gcc gnats entry:
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=8896
3. Setup of installation directory
- target=arm-linux
- prefix=/opt/tc-arm-linux-bu2.12.1-gcc3.2.2p-glibc2.2.5p # or whatever you
want
- mkdir -p $prefix/$target/include
- cp -r (path to linux sources)/linux/include/linux $prefix/$target/include
- cp -r (path to linux sources)/linux/include/asm-arm
$prefix/$target/include/asm
4. add $prefix/bin directory into your $PATH
- PATH=$prefix/bin:$PATH
5. Compilation of binutils
- cd build-binutils
- ../binutils-2.12.1/configure --prefix=$prefix --target=$target
- make all install
- cd ..
6. Compilation of the bare-bone gcc
- cd build-gcc
- ../gcc-3.2.2/configure --target=$target --prefix=$prefix
--enable-languages=c --with-sysroot=$prefix/$target --without-headers
--disable-shared --disable-threads
- make all-gcc install-gcc
- cd ..
7. Compilation of glibc
- cd build-glibc
- CC="$target-gcc -mbig-endian" AR=$target-ar RANLIB=$target-ranlib
../glibc-2.2.5/configure --host=$target --prefix=$prefix/$target
--enable-add-ons=linuxthreads --with-headers=$prefix/$target/include
- make all install
- cd ..
8. Compilation of complete gcc
- cd build-gcc2
- ../gcc-3.2.2/configure --prefix=$prefix --target=$target
--enable-languages=c --with-sysroot=$prefix/$target
- make all install
- cd ..
Note: At the above step, we haven't been able to active other
languages like c++. We would accept any idea to fix that.
9. Compilation of gdb
- cd build-gdb
- ../gdb-5.3/configure --prefix=$prefix --target=$target
- make all install
- cd ..
--end--
--
David Mentré - Research engineer
Mitsubishi Electric ITE-TCL / European Telecommunication Research Laboratory
Phone: +33 2 23 45 58 29 / Fax: +33 2 23 45 58 59
http://www.mitsubishi-electric-itce.fr
