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powerpc/64e: Fix amdgpu build on Book3E w/o AltiVec

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There's a build failure for Book3E without AltiVec:
  Error: cc1: error: AltiVec not supported in this target
  make[6]: *** [/linux/scripts/Makefile.build:250:
  drivers/gpu/drm/amd/amdgpu/../display/dc/dml/display_mode_lib.o] Error 1

This happens because the amdgpu build is only gated by
PPC_LONG_DOUBLE_128, but that symbol can be enabled even though AltiVec
is disabled.

The only user of PPC_LONG_DOUBLE_128 is amdgpu, so just add a dependency
on AltiVec to that symbol to fix the build.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221027125626.1383092-1-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2022-10-27 23:56:26 +11:00
parent f98b4d1371
commit 2153fc9623
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/Kconfig
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@ -285,7 +285,7 @@ config PPC
#
config PPC_LONG_DOUBLE_128
depends on PPC64
depends on PPC64 && ALTIVEC
def_bool $(success,test "$(shell,echo __LONG_DOUBLE_128__ | $(CC) -E -P -)" = 1)
config PPC_BARRIER_NOSPEC