Downloaded tarballs:
to be installed: binutils 2.22 gcc 4.7.1
to allow compilation: gcc and make of your system, gmp 5.0.5(>=4.2) mpc-1.0(>=0.8.0) mpfr 3.1.1(>=2.3.1)
my system is OpenSUSE/amd64, any Linux will do, for others you need gmake to compile CHDK.
make some directory (/opt/chdk in my case) where tools will reside and make sure you own it.
place them in some empty directory and untar:
$ for c in *.tar.bz2 ; do tar tfj $c ; done
$ cd binutils*
$ mkdir build; cd build ; ../configure --target=arm-elf --prefix=/opt/chdk
$ make ; make install
$ cd ..
all went well so far, lets get to gcc
$ cd gcc*
patch gcc as follows (uncomment two lines in .gcc/config/arm/t-arm-elf to disable interworking warnings)
# MULTILIB_OPTIONS += mno-thumb-interwork/mthumb-interwork
# MULTILIB_DIRNAMES += normal interwork
$ mkdir build ; cd build
$ ../configure --target=arm-elf --prefix=/opt/chdk --enable-languages=c --disable-shared \
--disable-newlib --disable-libssp
Minutes later:
configure: error: Building GCC requires GMP 4.2+, MPFR 2.3.1+ and MPC 0.8.0+.
Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
their locations. Source code for these libraries can be found at
their respective hosting sites as well as at
ftp://gcc.gnu.org/pub/gcc/infrastructure/. See also
http://gcc.gnu.org/install/prerequisites.html for additional info. If
you obtained GMP, MPFR and/or MPC from a vendor distribution package,
make sure that you have installed both the libraries and the header
files. They may be located in separate packages.
That gives us enough hints to do:
$ cd ..
$ ln -s ../gmp-5.0.5 gmp
$ ln -s ../mpfr-3.1.1 mpfr
$ ln -s ../mpc-1.0 mpc
$ cd build
$make
minutes later...
*** Configuration arm-unknown-elf is obsolete.
*** Specify --enable-obsolete to build it anyway.
*** Support will be REMOVED in the next major release of GCC,
*** unless a maintainer comes forward.
Unless one comes forward this is the last usable GCC version... by now we do:
$ ../configure --target=arm-elf --prefix=/opt/chdk --enable-languages=c --disable-shared --disable-newlib --disable-libssp --enable-obsolete
$ make -j4 ; make install
Half-hour later:
/opt/chdk/bin/arm-elf-gcc -v
Using built-in specs.
COLLECT_GCC=/opt/chdk/bin/arm-elf-gcc
COLLECT_LTO_WRAPPER=/opt/chdk/lib/gcc/arm-elf/4.7.1/lto-wrapper
Target: arm-elf
Configured with: ../configure --target=arm-elf --prefix=/opt/chdk --enable-languages=c --disable-shared --disable-newlib --disable-libssp --enable-obsolete
Thread model: single
gcc version 4.7.1 (GCC)
it builds firzipsub of trunk and 1.1 (2086), no radical speedup, slowdown or size difference against autobuild.
Update - 9oct2012: 4.7.2 works same way
