Re: [PATCH 0/3] fixes for CLANG35 on ARM

[Leif Lindholm <leif.lindholm@linaro.org>]

On Wed, Dec 12, 2018 at 11:33:05AM +0100, Ard Biesheuvel wrote:
> Building with Clang 3.5 for ARM may result in build breakage, due to the
> fact that it may emit non-adjacent movw/movt instructions pairs which
> cannot be relocated in PE/COFF. We pass -mno-movt in some places to
> work around a related issue in the relocatable PrePi in ArmVirtPkg, but
> we need to disable movw/movt entirely to really address this issue.
> 
> So first, fix some breakage that results from building with -mlong-calls
> in the optimized BaseMemoryLib code (#1)
> 
> Patch #2 switches to -mkernel, which disables movw/movt generation (and
> enabled -mlong-calls as a side effect)
> 
> Patch #3 removes the now redundant, and incompatible command line
> overrides for the relocatable PrePi.

For 1,3/3:
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Bob Feng <bob.c.feng@intel.com>
> Cc: Leif Lindholm <leif.lindholm@linaro.org>
> Cc: Laszlo Ersek <lersek@redhat.com>
> 
> Ard Biesheuvel (3):
>   MdePkg/BaseMemoryLibOptDxe ARM: add missing function annotations
>   BaseTools/tools_def ARM CLANG35: work around -mno-movt option name
>     change
>   ArmVirtPkg/PrePi ARM CLANG35: drop incompatible command line option
> 
>  ArmVirtPkg/ArmVirtQemuKernel.dsc                     | 5 -----
>  ArmVirtPkg/ArmVirtXen.dsc                            | 5 -----
>  BaseTools/Conf/tools_def.template                    | 2 +-
>  MdePkg/Library/BaseMemoryLibOptDxe/Arm/CompareGuid.S | 1 +
>  MdePkg/Library/BaseMemoryLibOptDxe/Arm/CompareMem.S  | 1 +
>  MdePkg/Library/BaseMemoryLibOptDxe/Arm/CopyMem.S     | 1 +
>  MdePkg/Library/BaseMemoryLibOptDxe/Arm/SetMem.S      | 5 +++++
>  7 files changed, 9 insertions(+), 11 deletions(-)
> 
> -- 
> 2.19.2
>