Go to file
Daniel Laird 5432f26f0e Adding Central config.cache options
The following changes allow for use of a central configure cache
file.  This speeds up configuration of packages.
Its use is configurable at the top level (BR2_CONFIG_CACHE - default n).
Old style makefiles can use it if they use the following MACRO in makefiles:
$(AUTO_CONFIGURE_TARGET) see my change to directfb.mk.
New style Autotools.in will use it if you set the global option.
However you can enable the global option and on a per package overrule it by doing
the following: $(PKGNAME)_USE_CONFIG_CACHE = NO see fontconfig.mk for an example 
of this.
Finally I have removed a few config variable settings which indicated no CXX compiler
as this is wrong and breaks the build when using this central cache.

 Config.in                        |    8 ++++++++
 package/Makefile.autotools.in    |    5 ++++-
 package/Makefile.in              |   28 +++++++++++++++++++++++++++-
 package/atk/atk.mk               |    2 +-
 package/directfb/directfb.mk     |    7 +------
 package/fontconfig/fontconfig.mk |    3 +++
 package/libglib2/libglib2.mk     |    2 +-
 package/libgtk2/libgtk2.mk       |    1 -
 8 files changed, 45 insertions(+), 11 deletions(-)

I would appreciate feedback on this change (I have been testing for 2-3 weeks)
But I can never test all cases!  If you enable the BR2_CONFIG_CACHE option some
Makefile.autotools.in based packages may now break - I cannot build them all.
In this case you may need to remove config options that are being hardcoded all
over the place (like gtk saying we have 2 CXX compiler) or disable the use
of CONFIG CACHE file like I have done in fontconfig.
I can build all packages required to get WebKit on DirectFB up and running
and it runs fine.
I will try to resolve any issues this creates as fast as I can.

Signed-off-by: Daniel Laird <daniel.j.laird@nxp.com>
2008-11-28 14:20:47 +00:00
docs - extend documentation to mention adding package/foo/Config.in to package/Config.in 2008-10-14 16:20:55 +00:00
package Adding Central config.cache options 2008-11-28 14:20:47 +00:00
project buildroot: add QUIET variable and use it for wget/git/svn/configure 2008-10-21 08:56:26 +00:00
scripts new package wizard: change bash-specific construct 2008-10-22 05:19:04 +00:00
target linux: remove unused BR2_LINUX_BOARD_PATCH 2008-11-14 13:39:58 +00:00
toolchain kernel-headers: bump 2.6.26 and 2.6.27 minor versions 2008-11-05 11:11:43 +00:00
.defconfig defconfig: remove settings with default values 2008-04-04 07:12:42 +00:00
Config.in Adding Central config.cache options 2008-11-28 14:20:47 +00:00
Makefile Makefile: revert HOST_GLIB_BIN staging_dir fix (r23920,23923) 2008-11-07 08:57:59 +00:00
TODO - mark the autotools.in part as taken 2007-09-28 20:52:09 +00:00

To build and use the buildroot stuff, do the following:

1) run 'make menuconfig'
2) select the packages you wish to compile
3) run 'make'
4) wait while it compiles
5) Use your shiny new root filesystem.  Depending on which sortof
    root filesystem you selected, you may want to loop mount it,
    chroot into it, nfs mount it on your target device, burn it
    to flash, or whatever is appropriate for your target system.

You do not need to be root to build or run buildroot.  Have fun!

 -Erik

Offline build:
==============

In order to do an offline-build (not connected to the net), fetch all
selected source by issuing a
$ make source

before you disconnect.
If your build-host is never connected, then you have to copy buildroot
and your toplevel .config to a machine that has an internet-connection
and issue "make source" there, then copy the content of your dl/ dir to
the build-host.

Building out-of-tree:
=====================

Buildroot supports building out of tree with a syntax similar
to the Linux kernel. To use it, add O=<directory> to the
make command line, E.G.:

$ make O=/tmp/build

And all the output files will be located under /tmp/build.

More finegrained configuration:
===============================

You can specify a config-file for uClibc:
$ make UCLIBC_CONFIG_FILE=/my/uClibc.config

And you can specify a config-file for busybox:
$ make BUSYBOX_CONFIG_FILE=/my/busybox.config

To use a non-standard host-compiler (if you do not have 'gcc'),
make sure that the compiler is in your PATH and that the library paths are
setup properly, if your compiler is built dynamically:
$ make HOSTCC=gcc-4.3.orig HOSTCXX=gcc-4.3-mine

Depending on your configuration, there are some targets you can use to
use menuconfig of certain packages. This includes:
$ make HOSTCC=gcc-4.3 linux26-menuconfig
$ make HOSTCC=gcc-4.3 uclibc-menuconfig
$ make HOSTCC=gcc-4.3 busybox-menuconfig

Please feed suggestions, bug reports, insults, and bribes back to:
	Erik Andersen <andersen@codepoet.org>
or the buildroot mailing list.