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Vadim Bendebury 5f7e4f019e make: support absolute and relative obj= specifications
There has been a problem with out of tree build directories specified
using relative paths, as in

$ make obj=../build/peppy

while specifying full path to obj works fine. This patch fixes the
problem, making sure that make's path manipulation string substitute
command is applied to both source and build roots.

To test this ran the following script

echo > /tmp/build.log
for build_root in ./ ../ ''; do
  build_dirs="${build_root}build/peppy"
  if [ -n "${build_root}" ]; then
    build_dirs+=" $(realpath ${build_root})/build/peppy"
  fi
  for build_dir in ${build_dirs}; do
    rm -rf $build_dir .config* build* ../build*
    make obj=${build_dir} menuconfig # configure for google peppy board
    echo "building in ${build_dir}" >> /tmp/build.log
    if ! make obj=${build_dir}; then
      exit
    fi
  done
done

and then checked the generated file:

$ cat /tmp/build.log

building in ./build/peppy
building in /home/vbendeb/old_projects/coreboot/source_code/build/peppy
building in ../build/peppy
building in /home/vbendeb/old_projects/coreboot/build/peppy
building in build/peppy

Change-Id: If46b046108e906796fe84716e93bf341b3785f14
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/10127
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2015-05-08 19:47:11 +02:00
3rdparty 3rdparty/vboot: Add vboot 2015-05-05 22:49:34 +02:00
Documentation Rename documentation -> Documentation 2015-05-06 19:09:47 +02:00
payloads libpayload: Guard PCI using code appropriately in XHCI driver 2015-05-04 22:21:17 +02:00
src timestamp: fix incremental linking error for !HAVE_MONOTONIC_TIMER 2015-05-07 19:52:50 +02:00
util cbfstool: Fix strange flashmap whitespace 2015-05-08 19:45:55 +02:00
.gitignore .gitignore: add the doxygen directory. 2014-12-14 23:30:45 +01:00
.gitmodules 3rdparty/vboot: Add vboot 2015-05-05 22:49:34 +02:00
.gitreview add .gitreview 2012-11-01 23:13:39 +01:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
MAINTAINERS MAINTAINERS: Add lint scripts 2015-05-07 19:41:22 +02:00
Makefile make: support absolute and relative obj= specifications 2015-05-08 19:47:11 +02:00
Makefile.inc build system: use platform specific ar(1) for libverstage 2015-05-08 14:47:18 +02:00
README Update README with newer version of the text from the web page 2011-06-15 10:16:33 +02:00
toolchain.inc vboot: split class in library and stage 2015-04-30 15:39:53 +02:00

README

-------------------------------------------------------------------------------
coreboot README
-------------------------------------------------------------------------------

coreboot is a Free Software project aimed at replacing the proprietary BIOS
(firmware) found in most computers.  coreboot performs a little bit of
hardware initialization and then executes additional boot logic, called a
payload.

With the separation of hardware initialization and later boot logic,
coreboot can scale from specialized applications that run directly
firmware, run operating systems in flash, load custom
bootloaders, or implement firmware standards, like PC BIOS services or
UEFI. This allows for systems to only include the features necessary
in the target application, reducing the amount of code and flash space
required.

coreboot was formerly known as LinuxBIOS.


Payloads
--------

After the basic initialization of the hardware has been performed, any
desired "payload" can be started by coreboot.

See http://www.coreboot.org/Payloads for a list of supported payloads.


Supported Hardware
------------------

coreboot supports a wide range of chipsets, devices, and mainboards.

For details please consult:

 * http://www.coreboot.org/Supported_Motherboards
 * http://www.coreboot.org/Supported_Chipsets_and_Devices


Build Requirements
------------------

 * gcc / g++
 * make

Optional:

 * doxygen (for generating/viewing documentation)
 * iasl (for targets with ACPI support)
 * gdb (for better debugging facilities on some targets)
 * ncurses (for 'make menuconfig')
 * flex and bison (for regenerating parsers)


Building coreboot
-----------------

Please consult http://www.coreboot.org/Build_HOWTO for details.


Testing coreboot Without Modifying Your Hardware
------------------------------------------------

If you want to test coreboot without any risks before you really decide
to use it on your hardware, you can use the QEMU system emulator to run
coreboot virtually in QEMU.

Please see http://www.coreboot.org/QEMU for details.


Website and Mailing List
------------------------

Further details on the project, a FAQ, many HOWTOs, news, development
guidelines and more can be found on the coreboot website:

  http://www.coreboot.org

You can contact us directly on the coreboot mailing list:

  http://www.coreboot.org/Mailinglist


Copyright and License
---------------------

The copyright on coreboot is owned by quite a large number of individual
developers and companies. Please check the individual source files for details.

coreboot is licensed under the terms of the GNU General Public License (GPL).
Some files are licensed under the "GPL (version 2, or any later version)",
and some files are licensed under the "GPL, version 2". For some parts, which
were derived from other projects, other (GPL-compatible) licenses may apply.
Please check the individual source files for details.

This makes the resulting coreboot images licensed under the GPL, version 2.