Le 18/02/2011 16:16, Raghuveer Murthy a écrit : > U-boot built for MeeGo on PandaBoard, with compiler option > -mfloat-abi=hard, caused a build break. Please refer to the bug id: > > http://bugs.meego.com/show_bug.cgi?id=13140
Is this the official U-Boot? Why is it still at 2010.09 ? > Removing the -msoft-float options in the config.mk files, allowed it > to be built for both armv7hl and armv7el compilers on MeeGo > > Please refer to the below link for more details: > http://wiki.meego.com/SDK/Toolchains/ToolchainChangeProposal > > Signed-off-by: Raghuveer Murthy<raghuveer.mur...@ti.com> I would like to know which board of mainline U-boot is affected by the issue and how I can reproduce it on u-boot[-arm]/master. However, I can already tell that this 'bug' can only occur upon a mix of object files compiled with -msoft-float and -mhard-float; which means some files were compiled with -mhard-float; and this should not happen at all, since U-Boot should not use any floats at all, so: - either some files in the case reported were compiled voluntarily with hard-float, and this is not a generally supported use case of U-Boot; - or they were compiled without any float option and the toolchain defaulted to hard-float, which may be a meego but is no reason in itself for U-Boot to adapt to it. My feeling at the moment is that U-Boot should keep -msoft-float, to be sure that any float code present in the code base, if it has to be, will run regardless of hw floating point capabilities, because U-Boot binaries should make the least possible assumptions on the hardware they are running on. Now, CPUs/SoCs/boards that know they have a floating point unit may justly want to replace -msoft-float with -mhard-float everywhere throughout U-Boot; I would welcome a patch that allows U-Boot to default to soft float while allowing CPUs/SoCs/boards to override it for hard float. In no case, however, should -msoft-float be *removed*: that would make float support in U-Boot implicit and dependent on the toolchain in use, and I think U-Boot float support should always be explicit and not depend on the toolchain. Amicalement, -- Albert. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
