-ffunction-sections -fdata-sections have no effect

[Valentin Longchamp <valentin dot longchamp at epfl dot ch>]

Hello,

I am working with an arm-none-linux-gnueabi toolchain I built using 
crosstool-0.42 with Martin Guy's pathes. Here is my config script so that you 
have all the information:

> #!/bin/sh
> set -ex
> TARBALLS_DIR=$HOME/EPFL/diplome_ASL/toolchain/work
> RESULT_TOP=/opt/crosstool
> export TARBALLS_DIR RESULT_TOP
>
> SRC_DIR=$HOME/EPFL/diplome_ASL/toolchain/work
> export SRC_DIR
>
> # Really, you should do the mkdir before running this,
> # and chown /opt/crosstool to yourself so you don't need to run as root.
> mkdir -p $RESULT_TOP
>
> BINUTILS_DIR=binutils-2.16.92
> export BINUTILS_DIR
>
> BUILD=i686-pc-linux-gnu
> export BUILD
> BUILD_DIR=$HOME/EPFL/diplome_ASL/toolchain/crosstool-0.42/build/arm-none-li
>nux-gnueabi/gcc-4.1.1-glibc-2.4-nptl-2 export BUILD_DIR
>
> EXTRA_TARGET_CFLAGS=-mabi=aapcs-linux
> export EXTRA_TARGET_CFLAGS
>
> GCC_CORE_DIR=gcc-4.1.1
> export GCC_CORE_DIR
> GCC_DIR=gcc-4.1.1
> export GCC_DIR
> GCC_EXTRA_CONFIG=--disable-libunwind-exceptions
> export GCC_EXTRAG_CONFIG
> GCC_LANGUAGES=c,c++
> export GCC_LANGUAGES
>
>
> GLIBCPORTS_FILENAME=glibc-ports-2.4
> export GLIBCPORTS_FILENAME
> GLIBC_ADDON_OPTIONS=nptl,../glibc-2.4/ports
> export GLIBC_ADDON_OPTIONS
> GLIBC_DIR=glibc-2.4
> export GLIBC_DIR
> GLIBC_EXTRA_CONFIG="--with-tls --with-__thread --enable-kernel=2.6.4
> --with-abi=aapcs-linux"
>
> export GLIBC_EXTRA_CONFIG
> KERNELCONFIG=$HOME/EPFL/diplome_ASL/toolchain/crosstool-0.42/armeabi.config
> export KERNELCONFIG
> LINUX_DIR=linux-2.6.17.1
> export LINUX_DIR
>
> PREFIX=/opt/crosstool/gcc-4.1.1-glibc-2.4-nptl-2/arm-none-linux-gnueabi
> export PREFIX
> SHARED_MODE=--enable-shared
> export SHARED_MODE
>
> TARGET=arm-none-linux-gnueabi
> export TARGET
> TARGET_CFLAGS=-O
> export TARGET_CFLAGS
>
> TOP_DIR=$HOME/EPFL/diplome_ASL/toolchain/crosstool-0.42
> export TOP_DIR
>
> sh all.sh --notest

When I add the -ffunction-sections -fdata-sections to my static builds in 
order to have small and easily distributable binaries for the platform, I 
still get the same huge binary, like if the whole glibc was included.

Do I need to put some extra toolchain build config information to get the 
wanted result ?

Thank you

Valentin

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