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@@ -77,7 +77,10 @@ include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
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KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
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KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
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-Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
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-Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
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KBUILD_CFLAGS += $(KERNEL_DEFINES)
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KBUILD_CFLAGS += $(KERNEL_DEFINES)
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-KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
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+# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
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+# a lot more stack due to the lack of sharing of stacklots:
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+KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
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+ echo $(call cc-option,-fno-unit-at-a-time); fi ;)
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PHONY += linux
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PHONY += linux
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