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e3de3ae58e
This commit fixes two separate, but related build failures:
* A failure that was happening when the ARM CPU supports NEON,
floating point is enabled, but not with the NEON FPU. In this case,
the NEON ARM assembly is rejected by the assembler, with messages
like "Error: selected FPU does not support instruction -- `vmul.f32
q0,q0,q1'". To fix this, we pass -mfpu=neon when we build mplayer
with NEON support.
Fixes:
http://autobuild.buildroot.org/results/257/257a10e9cb5022bb09e0c6a03844be5b5b3e0bd4/
* A failure that was happening when the ARM CPU supports NEON, but
the configuration is anyway using soft-float. In this case, mplayer
attempts to compile NEON floating point instructions, but this
obviously fail in a soft-float context, with errors such as 'Error:
selected processor does not support ARM mode `vmov d0,r7,r8''. To
fix this, we do not allow NEON to be enabled when we are in a
soft-float configuration.
Fixes:
http://autobuild.buildroot.org/results/7b3/7b3c89fcd496c0bc80063f63ecd58c827e8077ea/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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 sort of
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!
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 (including .config) 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 linux-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 the
buildroot mailing list: buildroot@buildroot.org