On Mon, Jan 24, 2011 at 6:42 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > Drasko DRASKOVIC <drasko.draskovic@xxxxxxxxx> writes: > >> I am trying to compile GCC 4.5.1 and newlib-1.18.0 in one-pass >> combined build. I created symlink to newlib directory in gcc >> directory. Target is arm-elf. >> >> I use configuration options --disable-multilib and --with-endian=big. OK, so I guess that --with-endian=big is useless... > > As far as I can see from the source code --with-endian=big is only > implemented for SH targets, not for ARM targets. The documentation is > unfortunately not really clear on that point. Please consider opening a > bug report at http://gcc.gnu.org/bugzilla/ . > >> 3) Do I always have to use armeb-elf instead of arm-elf target when >> multilib is disabled > > Yes, I think you do. > > Ian Hi Ian, seems that --enable-biendian will force compilation of newlib to BE mode, and these than can be found under $GCC_INSTALL_DIR/lib/gcc/arm-elf/4.5.2/be/. I.e., this "be" directory will start apearing, while before (without --enable-biendian) added it will be missing. Newlib do not recognize armeb-elf target, so it has to be patched with : diff -Naur newlib-1.19.0/newlib/configure.host chg_newlib-1.19.0/newlib/configure.host --- newlib-1.19.0/newlib/configure.host 2010-12-02 20:30:46.000000000 +0100 +++ chg_newlib-1.19.0/newlib/configure.host 2011-01-24 17:01:31.000000000 +0100 @@ -96,7 +96,7 @@ arc) machine_dir= ;; - arm) + arm*) machine_dir=arm ;; avr*) This will allow armeb toolchain to compile, however my software compiled with this toolchain does not work well. Note that I also used GCC patch for arm-elf : diff -Naur gcc-4.5.2/gcc/config/arm/t-arm-elf chg_gcc-4.5.2/gcc/config/arm/t-arm-elf --- gcc-4.5.2/gcc/config/arm/t-arm-elf 2009-08-06 16:27:45.000000000 +0200 +++ chg_gcc-4.5.2/gcc/config/arm/t-arm-elf 2011-01-21 18:03:41.000000000 +0100 @@ -49,25 +49,25 @@ # Not quite true. We can support hard-vfp calling in Thumb2, but how do we # express that here? Also, we really need architecture v5e or later # (mcrr etc). -MULTILIB_OPTIONS += mfloat-abi=hard +MULTILIB_OPTIONS += mfloat-abi=soft MULTILIB_DIRNAMES += fpu -MULTILIB_EXCEPTIONS += *mthumb/*mfloat-abi=hard* +MULTILIB_EXCEPTIONS += *mthumb/*mfloat-abi=soft* # MULTILIB_OPTIONS += mcpu=ep9312 # MULTILIB_DIRNAMES += ep9312 # MULTILIB_EXCEPTIONS += *mthumb/*mcpu=ep9312* -# -# MULTILIB_OPTIONS += mlittle-endian/mbig-endian -# MULTILIB_DIRNAMES += le be -# MULTILIB_MATCHES += mbig-endian=mbe mlittle-endian=mle -# + +MULTILIB_OPTIONS += mlittle-endian/mbig-endian +MULTILIB_DIRNAMES += le be +MULTILIB_MATCHES += mbig-endian=mbe mlittle-endian=mle + # MULTILIB_OPTIONS += mhard-float/msoft-float # MULTILIB_DIRNAMES += fpu soft # MULTILIB_EXCEPTIONS += *mthumb/*mhard-float* -# -# MULTILIB_OPTIONS += mno-thumb-interwork/mthumb-interwork -# MULTILIB_DIRNAMES += normal interwork -# + +MULTILIB_OPTIONS += mno-thumb-interwork/mthumb-interwork +MULTILIB_DIRNAMES += normal interwork + # MULTILIB_OPTIONS += fno-leading-underscore/fleading-underscore # MULTILIB_DIRNAMES += elf under # which was needed to force soft FPU (otherwise newlib compilation used to break). BR, Drasko
