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