MTD 248-645A Bedienungsanleitung PDF herunterladen (Seite 57)

Linux From Scratch - Version 7.0

5.5. GCC-4.6.1 - Pass 1

The GCC package contains the GNU compiler collection, which includes the C and C++ compilers.

Approximate build time: 5.0 SBU

Required disk space: 1.2 GB

5.5.1. Installation of Cross GCC

GCC now requires the GMP, MPFR and MPC packages. As these packages may not be included in your host

distribution, they will be built with GCC. Unpack each package into the GCC source directory and rename the

resulting directories so the GCC build procedures will automatically use them:

tar -jxf ../mpfr-3.1.0.tar.bz2

mv -v mpfr-3.1.0 mpfr

tar -jxf ../gmp-5.0.2.tar.bz2

mv -v gmp-5.0.2 gmp

tar -zxf ../mpc-0.9.tar.gz

mv -v mpc-0.9 mpc

Apply a patch that will allow the building of the libiberty and zlib target libraries to be disabled as these do not build

correctly in a cross-compiled environment:

patch -Np1 -i ../gcc-4.6.1-cross_compile-1.patch

The GCC documentation recommends building GCC outside of the source directory in a dedicated build directory:

mkdir -v ../gcc-build

cd ../gcc-build

Prepare GCC for compilation:

../gcc-4.6.1/configure \

--target=$LFS_TGT --prefix=/tools \

--disable-nls --disable-shared --disable-multilib \

--disable-decimal-float --disable-threads \

--disable-libmudflap --disable-libssp \

--disable-li/jointfilesconvert/297116/bgomp --disable-libquadmath \

--disable-target-libiberty --disable-target-zlib \

--enable-languages=c --without-ppl --without-cloog \

--with-mpfr-include=$(pwd)/../gcc-4.6.1/mpfr/src \

--with-mpfr-lib=$(pwd)/mpfr/src/.libs

The meaning of the configure options:

--disable-shared

This switch forces GCC to link its internal libraries statically. We do this to avoid possible issues with the host

system.

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MTD 248-645A Bedienungsanleitung Seite 57