[Buildroot] [git commit] assimp: work around gcc bug on SuperH
Peter Korsgaard
peter at korsgaard.com
Mon Feb 27 21:00:03 UTC 2017
>>>>> "Thomas" == Thomas Petazzoni <thomas.petazzoni at free-electrons.com> writes:
> commit: https://git.buildroot.net/buildroot/commit/?id=68cebedeb977396f64f5f591f5e93f34fab8e0a8
> branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master
> gcc versions earlier than gcc 6.x fail to build assimp on SuperH when
> static linking:
> AssxmlExporter.cpp:623:1: error: unable to find a register to spill in class 'GENERAL_REGS'
> It's the combination of -Os and *not* having -fPIC that makes gcc
> fail, which explains why configurations with dynamic linking work
> fine.
> -Os -fPIC -> works
> -Os -> fails
> -O2 -fPIC -> works
> -O2 -> works
> Therefore, as a workaround, we are forcing the use of -O2 on SuperH
> when the gcc version is older than gcc 6.x and we're statically
> linking.
> Fixes:
> http://autobuild.buildroot.net/results/ec88aa8118179e30e24603cc45292047dca19216/
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> ---
> package/assimp/assimp.mk | 8 ++++++++
> 1 file changed, 8 insertions(+)
> diff --git a/package/assimp/assimp.mk b/package/assimp/assimp.mk
> index 08893ff..298e121 100644
> --- a/package/assimp/assimp.mk
> +++ b/package/assimp/assimp.mk
> @@ -16,6 +16,14 @@ ifeq ($(BR2_m68k),y)
> ASSIMP_CXXFLAGS += -mxgot
> endif
> +# workaround SuperH compiler failure when static linking (i.e -fPIC is
> +# not passed) in gcc versions 5.x or older. The -Os optimization level
> +# causes a "unable to find a register to spill in class
> +# GENERAL_REGS" error. -O2 works fine.
Any specific reason for the unicode quotes?
> +ifeq ($(BR2_sh):$(BR2_STATIC_LIBS):$(BR2_HOST_GCC_AT_LEAST_6),y:y:)
HOST_GCC? Don't you mean BR2_TOOLCHAIN_GCC_AT_LEAST_6?
--
Bye, Peter Korsgaard
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