1ccflags-y := -DSRCTREE='"$(srctree)"' -DOBJTREE='"$(objtree)"' 2 3# if-lt 4# Usage VAR := $(call if-lt, $(a), $(b)) 5# Returns 1 if (a < b) 6if-lt = $(shell [ $(1) -lt $(2) ] && echo 1) 7 8ifeq ($(CONFIG_GCOV_FORMAT_3_4),y) 9 cc-ver := 0304 10else ifeq ($(CONFIG_GCOV_FORMAT_4_7),y) 11 cc-ver := 0407 12else 13# Use cc-version if available, otherwise set 0 14# 15# scripts/Kbuild.include, which contains cc-version function, is not included 16# during make clean "make -f scripts/Makefile.clean obj=kernel/gcov" 17# Meaning cc-ver is empty causing if-lt test to fail with 18# "/bin/sh: line 0: [: -lt: unary operator expected" error mesage. 19# This has no affect on the clean phase, but the error message could be 20# confusing/annoying. So this dummy workaround sets cc-ver to zero if cc-version 21# is not available. We can probably move if-lt to Kbuild.include, so it's also 22# not defined during clean or to include Kbuild.include in 23# scripts/Makefile.clean. But the following workaround seems least invasive. 24 cc-ver := $(if $(call cc-version),$(call cc-version),0) 25endif 26 27obj-$(CONFIG_GCOV_KERNEL) := base.o fs.o 28 29ifeq ($(call if-lt, $(cc-ver), 0407),1) 30 obj-$(CONFIG_GCOV_KERNEL) += gcc_3_4.o 31else 32 obj-$(CONFIG_GCOV_KERNEL) += gcc_4_7.o 33endif 34