beagleboard: document how to enable the hard floating point abi

Closes [YOCTO #1203]

Using the hard floating point abi is incompatible with some binary libaries and
3D support for the Beagleboard. While we do not provide these in poky and
meta-yocto, softfp should remain the default for compatibility reasons.

Provide documentation and a commented assignment to DEFAULT_TUNE instructing
how to enable hardfp, but leave it disabled by default.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
CC: Jason Kridner <jkridner@beagleboard.org>
CC: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/meta-yocto/conf/machine/beagleboard.conf b/meta-yocto/conf/machine/beagleboard.conf
index 0b3cebc1da..1b89c43563 100644
--- a/meta-yocto/conf/machine/beagleboard.conf
+++ b/meta-yocto/conf/machine/beagleboard.conf
@@ -18,6 +18,10 @@ MACHINE_EXTRA_RRECOMMENDS += "beagleboard-audio"
 # Allow for MMC booting (required by the NAND-less Beagleboard XM)
 EXTRA_IMAGEDEPENDS += "u-boot x-load"
 
+# Uncomment the following line to enable the hard floating point abi. Note that
+# this breaks some binary libraries and 3D (neither of which ship with
+# meta-yocto). For maximum compatibility, leave this disabled.
+#DEFAULTTUNE ?= "cortexa8hf-neon"
 include conf/machine/include/tune-cortexa8.inc
 
 IMAGE_FSTYPES += "tar.bz2 jffs2"