[MIPS] Check for GCC r10k-cache-barrier support
Check whether gcc supports -mr10-cache-barrier=1 and issue a cleaner error message if not. This option is needed to build working SGI IP28 kernels. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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@ -482,10 +482,13 @@ endif
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# be 16kb aligned or the handling of the current variable will break.
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# Simplified: what IP22 does at 128MB+ in ksegN, IP28 does at 512MB+ in xkphys
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#
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#core-$(CONFIG_SGI_IP28) += arch/mips/sgi-ip22/ arch/mips/arc/arc_con.o
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ifdef CONFIG_SGI_IP28
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ifeq ($(call cc-option-yn,-mr10k-cache-barrier=1), n)
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$(error gcc doesn't support needed option -mr10k-cache-barrier=1)
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endif
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endif
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core-$(CONFIG_SGI_IP28) += arch/mips/sgi-ip22/
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cflags-$(CONFIG_SGI_IP28) += -mr10k-cache-barrier=1 -Iinclude/asm-mips/mach-ip28
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#cflags-$(CONFIG_SGI_IP28) += -Iinclude/asm-mips/mach-ip28
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load-$(CONFIG_SGI_IP28) += 0xa800000020004000
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#
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