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| -rw-r--r-- | temporary-bootstrap-builder-setup.txt | 211 |
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diff --git a/temporary-bootstrap-builder-setup.txt b/temporary-bootstrap-builder-setup.txt new file mode 100644 index 0000000..fda7a76 --- /dev/null +++ b/temporary-bootstrap-builder-setup.txt @@ -0,0 +1,211 @@ +ABOUT THIS GUIDE +================ + +This is a guide to building a custom BusyBox/Linux-libre system with the GNU +toolchain. It mostly follows Cross Linux From Scratch version +SVN-0.0.1-20090726-x86, except that it uses more recent versions of software +packages and uses a BusyBox-based userspace rather than a GNU-based one. This +guide assumes the use of a GNU/Linux host system with all the necessary +development software (GCC, GNU Binutils, Subversion, etc.) already installed. + +It is recommended that you read Cross Linux From Scratch version +SVN-0.0.1-20090726-x86 to understand the full build process and the rationale +behind various elements of the setup. + + +PROCEDURE +========= + +Make a directory in which all work will be done. Under this directory, make +directories 'src' and sys': + $ mkdir src sys + +Download all of the necessary source archives and branches. + $ cd src + $ wget http://www.busybox.net/downloads/busybox-1.19.3.tar.bz2 + $ wget http://www.fsfla.org/svnwiki/selibre/linux-libre/download/releases/\ + > LATEST-3.1.N/linux-3.1.6-libre.tar.bz2 + $ svn co svn://svn.eglibc.org/branches/eglibc-2_14 eglibc-2.14 + $ wget http://ftp.gnu.org/gnu/gcc/gcc-4.6.2/gcc-4.6.2.tar.bz2 + $ wget http://ftp.gnu.org/gnu/binutils/binutils-2.22.tar.bz2 + $ wget http://ftp.gnu.org/gnu/make/make-3.82.tar.bz2 + $ wget http://ftp.gnu.org/gnu/automake/automake-1.11.2.tar.bz2 + $ wget http://ftp.gnu.org/gnu/autoconf/autoconf-2.68.tar.bz2 + $ wget http://ftp.gnu.org/gnu/m4/m4-1.4.16.tar.bz2 + $ wget ftp://ftp.gmplib.org/pub/gmp-5.0.2/gmp-5.0.2.tar.bz2 + $ wget http://www.mpfr.org/mpfr-current/mpfr-3.1.0.tar.bz2 + $ wget http://www.multiprecision.org/mpc/download/mpc-0.9.tar.gz + $ for file in *.tar.bz2; do tar -xjf ${file}; done + $ for file in *.tar.gz; do tar -xzf ${file}; done + $ cd .. + +Make and mount the filesystem. mkfs and mount must be run as the superuser, but +dd shouldn't need to be. + $ cd sys + $ dd if=/dev/zero of=fs bs=1024 count=$((3*1024*1024)) + # mkfs -t ext4 fs + $ mkdir fsmnt + # mount -o loop fs fsmnt + +Set up a new user. + # groupadd bbl + # useradd -s /bin/bash -g bbl -d /home/bbl bbl + # mkdir -pv /home/bbl + # chown -v bbl:bbl /home/bbl + # passwd bbl + # chown -Rv fsmnt + +Set up the toolchain work environment. Be sure to change '<BASE_DIR>' to the +absolute path to the base work directory you made earlier, and adjust the +configuration name in BBL_TARGET if you're building for a different +architecture. We're using GNU Bash as the new user's default shell for +convenience; this has no effect on the target system. + $ su - bbl + $ cat > ~/.bash_profile <<EOF + > exec env -i HOME="${HOME}" TERM="${TERM}" /bin/bash + > EOF + $ cat > ~/.bashrc <<EOF + > set +h + > umask 022 + > BBL=<BASE_DIR>/sys/fsmnt + > LC_ALL=C + > PATH=${BBL}/cross-tools/bin:/bin:/usr/bin + > export BBL LC_ALL PATH + > PS1='$ ' + > unset CFLAGS + > unset CXXFLAGS + > export BBL_HOST=$(echo ${MACHTYPE} | \ + > sed "s/$(echo ${MACHTYPE} | cut -d - -f 2)/cross/") + > export BBL_TARGET=x86_64-pc-linux-gnu + > EOF + $ source ~/.bash_profile + +Make system directories. These commands should give you a system that is +compliant with Filesystem Hierarchy Standard version 2.3. Note that the range +syntax in many of these command lines is a non-standard feature of GNU Bash; +this may not work on other shells. + $ mkdir -pv ${BBL}/bin + $ mkdir -pv ${BBL}/boot + $ mkdir -pv ${BBL}/dev + $ mkdir -pv ${BBL}/etc{,/opt} + $ mkdir -pv ${BBL}/home + $ mkdir -pv ${BBL}/lib + $ mkdir -pv ${BBL}/mnt + $ mkdir -pv ${BBL}/opt + $ mkdir -pv ${BBL}/proc + $ install -dv -m 0750 ${BBL}/root + $ mkdir -pv ${BBL}/sbin + $ mkdir -pv ${BBL}/srv + $ mkdir -pv ${BBL}/sys + $ install -dv -m 1777 ${BBL}{,/var}/tmp + $ mkdir -pv ${BBL}/usr/{,local/}{bin,include,lib,sbin,share/{man,misc},src} + $ mkdir -pv ${BBL}/usr/local/{etc,games} + $ mkdir -pv ${BBL}/usr/{,local/}share/{doc,info,locale,terminfo,zoneinfo} + $ mkdir -pv ${BBL}/usr/{,local/}share/man/man{1,2,3,4,5,6,7,8} + $ ln -sv share/man ${BBL}/usr/local/man + $ mkdir -pv ${BBL}/var/{cache,lib/misc,local,lock,log,mail,opt,run,spool} + +Write the passwd and group files. + $ cat > ${BBL}/etc/passwd <<EOF + > root::0:0:root:/root:/bin/bash + > EOF + $ cat > ${BBL}/etc/group <<EOF + > root:x:0: + > bin:x:1: + > sys:x:2: + > kmem:x:3: + > tty:x:4: + > tape:x:5: + > daemon:x:6: + > floppy:x:7: + > disk:x:8: + > lp:x:9: + > dialout:x:10: + > audio:x:11: + > video:x:12: + > utmp:x:13: + > usb:x:14: + > cdrom:x:15: + > EOF + +If CONFIG_FEATURE_UTMP and/or CONFIG_FEATURE_WTMP are enabled in BusyBox, +certain BusyBox applets (getty, login, init, etc.) will log user logins to +/var/run/utmp and/or /var/run/wtmp. However, BusyBox's supporting library won't +create /var/run/wtmp if it doesn't exist. So create these files now and set +proper modes for them. + $ touch ${BBL}/var/run/{u,w}tmp + $ chmod -v 664 ${BBL}/var/run/{u,w}tmp +/var/run/utmp is used to track logged-in users. /var/run/wtmp is used to record +when users log into and out of the system. NB: This is an odd location for +wtmp, but that's where an unpatched BusyBox will expect it. + +Make and change to a directory for package source code. + $ mkdir -v ${BBL}/src + $ cd ${BBL}/src + +Install Linux's headers for use by EGLIBC. + $ cp -pR ${BBL}/../../src/linux-3.1.6 . + $ cd linux-3.1.6 + $ make mrproper + $ make headers_check + $ make INSTALL_HDR_PATH=${BBL}/usr headers_install + $ find ${BBL}/usr/include/ -name .install -o -name ..install.cmd | \ + > xargs rm -fv + $ cd .. + $ rm -Rf linux-3.1.6 + +Install GMP for use by the cross-compiling GCC build. + $ cp -pR ${BBL}/../../src/gmp-5.0.2 . + $ cd gmp-5.0.2 + $ CPPFLAGS=-fexceptions ./configure --prefix=${BBL}/cross-tools --enable-cxx + $ make + $ make install + $ cd .. + $ rm -Rf gmp-5.0.2 + +Install MPFR for use by the cross-compiling GCC build. + $ cp -pR ${BBL}/../../src/mpfr-3.1.0 . + $ cd mpfr-3.1.0 + $ LDFLAGS="-Wl,-rpath,${BBL}/cross-tools/lib" ./configure \ + > --prefix=${BBL}/cross-tools --enable-shared --with-gmp=${BBL}/cross-tools + $ make + $ make install + $ cd .. + $ rm -Rf mpfr-3.1.0 + +Install PPL for use by the cross-compiling GCC build. + $ cp -pR ${BBL}/../../src/ppl-FIXME . + $ cd ppl-FIXME + $ LDFLAGS="-Wl,-rpath,${BBL}/cross-tools/lib" ./configure \ + > --prefix=${BBL}/cross-tools --enable-shared --enable-interfaces="c,cxx" \ + > --disable-optimization --with-libgmp-prefix=${BBL}/cross-tools \ + > --with-libgmpxx-prefix=${BBL}/cross-tools + $ make + $ make install + $ cd .. + $ rm -Rf ppl-FIXME + +Install CLooG-PPL for use by the cross-compiling GCC build. + $ cp -pR ${BBL}/../../src/FIXME . + $ cd FIXME + $ LDFLAGS="-Wl,-rpath,${BBL}/cross-tools/lib" ./configure \ + > --prefix=${BBL}/cross-tools --enable-shared --with-bits=gmp \ + > --with-gmp=${BBL}/cross-tools --with-ppl=${BBL}/cross-tools + $ make + $ make install + $ cd .. + $ rm -Rf FIXME + +Configure and build a cross-compiling GNU Binutils. + $ cp -pR ${BBL}/../../src/binutils-2.22 . + $ mkdir binutils-build + $ cd binutils-build + $ AR=ar AS=as ../binutils-2.22/configure --prefix=${BBL}/cross-tools \ + > --host=${BBL_HOST} --target=${BBL_TARGET} --with-sysroot=${BBL} \ + > --disable-nls --enable-shared --disable-multilib + $ make configure-host + $ make + $ make install + $ cp -v ../binutils-2.22/include/libiberty.h ${BBL}/usr/include + $ cd .. + $ rm -Rf binutils-2.22 binutils-build |