arch/powerpc: get rid of BR2_GCC_TARGET_TUNE
According to the gcc documentation for PowerPC options: '-mtune=CPU_TYPE' Set the instruction scheduling parameters for machine type CPU_TYPE, but do not set the architecture type, register usage, or choice of mnemonics, as '-mcpu=CPU_TYPE' would. The same values for CPU_TYPE are used for '-mtune' as for '-mcpu'. If both are specified, the code generated will use the architecture, registers, and mnemonics set by '-mcpu', but the scheduling parameters set by '-mtune'. In the case of Buildroot where we only target a specific system, using -mtune therefore doesn't make much sense, and using -mcpu would be more appropriate. As a consequence, this patch makes PowerPC use BR2_GCC_TARGET_CPU instead of BR2_GCC_TARGET_TUNE. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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@ -160,7 +160,7 @@ config BR2_ENDIAN
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config BR2_ARCH_HAS_ATOMICS
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default y
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config BR2_GCC_TARGET_TUNE
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config BR2_GCC_TARGET_CPU
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default "401" if BR2_powerpc_401
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default "403" if BR2_powerpc_403
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default "405" if BR2_powerpc_405
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