This port was renamed to amd64-linux-glibc and, along with i686-linux-glibc,
bootstrapped and uploaded on 2014-03-19.
The rest of this page is kept only for reference and historical purposes.
core-linux-eglibc is the first architecture port of ProteanOS 1.0.
(ProteanOS 0.x had a cortexa8-linux-eglibc architecture,
but core-linux-eglibc is being built from scratch.)
This port is being bootstrapped from a Debian GNU/Linux system.
Operating systems are often bootstrapped with GCC by building a cross compiling GCC with a sysroot then using that to build the system. This port is instead being bootstrapped natively in two stages. This is possible because care is taken to ensure that the resulting ELF binaries are compatible with the ProteanOS ABI (including the value of the ELF INTERP field and the file system hierarchy).
The first stage involves building base system and toolchain packages and unpacking them into a bootstrap system directory.
The second stage involves changing the file system root (with chroot(8)) to the bootstrap directory and building source packages.
The bootstrap is automated using the initial port bootstrap scripts.
See the included README file for instructions to perform an automatic
bootstrap of this first ProteanOS port.
The rest of this page is kept only for reference and historical purposes. The instructions below are incomplete and should not be used to bootstrap ProteanOS.
Stage 1
These instructions are tested on a Debian wheezy amd64 GNU/Linux system.
The following directory structure is assumed:
<work-root>/
+- bootstrap_core-linux-eglibc/
+- etc/
+- lib/
+- [...]
+- pkg/
+- binutils/
+- eglibc/
+- gcc-4.7/
+- [...]
+- zlib/
Preparation
Build and install opkbuild 3.0.0-alpha4 and opkhelper 3.0.0-beta2.
The build system needs to be made to look a little more like ProteanOS.
To install /etc/proteanos_arch and /etc/proteanos_plat files on the build
system for opkbuild(1), run opkbuild's mksysconf makefile with ARCH and
PLAT macros, e.g.:
# ./mksysconf ARCH=core-linux-eglibc PLAT=dev
The gcc-4.7 package will look for a symbolic link to the ELF interpreter
(dynamic linker) at /usr/lib/core-linux-eglibc/ld.so.
# mkdir /lib/core-linux-eglibc /usr/lib/core-linux-eglibc
# ln -sf /lib64/ld-linux-x86-64.so.2 /lib/core-linux-eglibc/ld-linux-x86-64.so.2
# ln -sf /lib/core-linux-eglibc/ld-linux-x86-64.so.2 /usr/lib/core-linux-eglibc/ld.so
Make a directory for the bootstrap ProteanOS system.
$ mkdir bootstrap_core-linux-eglibc
ProteanOS's ELF interpreter is not installed in the location described in the ELF INTERP field of binaries built with the build system's GCC. Make a symbolic link in the bootstrap system directory to direct Linux to the correct location when it executes the stage 1 binaries.
$ mkdir bootstrap_core-linux-eglibc/lib64
$ ln -sf /lib/core-linux-eglibc/ld-linux-x86-64.so.2 bootstrap_core-linux-eglibc/lib64/ld-linux-x86-64.so.2
For most packages, this can be made unnecessary using GNU ld's
--dynamic-linker option, e.g. by setting LDFLAGS to
-Wl,--dynamic-linker=/lib/core-linux-eglibc/ld-linux-x86-64.so.2. Doing this
when building GCC, however, makes executables like gcc, cpp, and cc1
declare superfluous ELF NEEDED dependencies on libstdc++.so.6 and
libgcc_s.so.1.
Building EGLIBC
Run the following commands in a copy of the eglibc source package to build
EGLIBC for the bootstrap system.
$ opkbuild -b -c
Building zlib
Run the following commands in a copy of the zlib source package to build zlib
for the bootstrap system.
$ opkbuild -b -c
Building, Installing, and Testing GNU Binutils
Run the following commands in a copy of the binutils source package to build
GNU Binutils for the bootstrap system.
$ ./config clean
$ PKG_TARGETS='core-linux-eglibc' ./config
$ opkbuild -b -c
Run the following commands in the bootstrap system directory to unpack the
binutils packages and their dependencies:
$ tar -xzOf ../pkg/libc.6_2.17~r22751+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/libz.1_1.2.7+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/binutils-common_2.22-1_all_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/binutils-core-linux-eglibc_2.22-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
Now test some Binutils programs.
# chroot . as --version
GNU assembler (GNU Binutils for ProteanOS) 2.22
Copyright 2011 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or later.
This program has absolutely no warranty.
This assembler was configured for a target of `x86_64-unknown-linux-gnu'.
# chroot . readelf -hl /usr/bin/readelf
[...]
# chroot . objdump -p /usr/bin/objdump
[...]
Building the Multiple Precision Libraries
TODO.
Building, Installing, and Testing GCC
Run the following commands in a copy of the gcc-4.7 source package to build
GCC for the bootstrap system.
$ ./config clean
$ PKG_TARGETS='core-linux-eglibc' ./config
$ opkbuild -b -c
Run the following commands in the bootstrap system directory to unpack the
gcc-4.7 packages and their dependencies.
$ tar -xzOf ../pkg/libc.6-dev_2.17~r22751+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/libgcc.1_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/libgomp.1_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/libitm.1_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/libgmp.10_5.0.5-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/libmpc.3_1.0.1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/libmpfr.4_3.1.1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/cpp-4.7-core-linux-eglibc_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/gcc-4.7-common_4.7.3+sip1-1_all_all.opk data.tar.gz | tar -xz
$ tar -xzOf ../pkg/gcc-4.7-core-linux-eglibc_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
Now try compiling, linking, and running an example program (the fitblk.c
example from zlib).
$ tar -xzOf ../pkg/libz.1-dev_1.2.7+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
$ cp ../pkg/zlib/tmp/src/examples/fitblk.c .
# chroot . core-linux-eglibc-gcc-4.7 -lz -o /fitblk /fitblk.c
# chroot . /fitblk
fitblk abort: need one argument: size of output block
Building and Installing GNU Make
Run the following commands in a copy of the gmake source package to build GNU
Make for the bootstrap system.
$ opkbuild -b -c
Run the following commands in the bootstrap system directory to unpack the
gmake package:
$ tar -xzOf ../pkg/gmake_3.82-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz
TODO
To be built and installed are busybox, linux-libre (headers), gcc-defaults, opkbuild, and opkhelper-3.0.
Stage 2
TODO.