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[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>
This commit is contained in:
Thomas Bogendoerfer 2008-03-15 12:28:51 +01:00 committed by Ralf Baechle
parent a05e623f63
commit 82933342c3
1 changed files with 5 additions and 2 deletions
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7
arch/mips/Makefile
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@ -482,10 +482,13 @@ endif
# be 16kb aligned or the handling of the current variable will break.
# Simplified: what IP22 does at 128MB+ in ksegN, IP28 does at 512MB+ in xkphys
#
#core-$(CONFIG_SGI_IP28) += arch/mips/sgi-ip22/ arch/mips/arc/arc_con.o
ifdef CONFIG_SGI_IP28
ifeq ($(call cc-option-yn,-mr10k-cache-barrier=1), n)
$(error gcc doesn't support needed option -mr10k-cache-barrier=1)
endif
endif
core-$(CONFIG_SGI_IP28) += arch/mips/sgi-ip22/
cflags-$(CONFIG_SGI_IP28) += -mr10k-cache-barrier=1 -Iinclude/asm-mips/mach-ip28
#cflags-$(CONFIG_SGI_IP28) += -Iinclude/asm-mips/mach-ip28
load-$(CONFIG_SGI_IP28) += 0xa800000020004000
#