[android-sdk/device-ti-proprietary-open.git] / jacinto6 / sgx_src / eurasia_km / eurasiacon / build / linux2 / kernel_version.mk
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39 ### ###########################################################################
41 $(if $(KERNELDIR),,$(error KERNELDIR must be set to obtain a version))
43 override KERNEL_VERSION := \
44 $(shell grep "^VERSION = " $(KERNELDIR)/Makefile | cut -f3 -d' ')
45 override KERNEL_PATCHLEVEL := \
46 $(shell grep "^PATCHLEVEL = " $(KERNELDIR)/Makefile | cut -f3 -d' ')
47 override KERNEL_SUBLEVEL := \
48 $(shell grep "^SUBLEVEL = " $(KERNELDIR)/Makefile | cut -f3 -d' ')
49 override KERNEL_EXTRAVERSION := \
50 $(shell grep "^EXTRAVERSION = " $(KERNELDIR)/Makefile | cut -f3 -d' ')
52 # Break the kernel version up into a space separated list
53 kernel_version_as_list := $(KERNEL_VERSION) \
54 $(KERNEL_PATCHLEVEL) \
55 $(KERNEL_SUBLEVEL) \
56 $(patsubst .%,%,$(KERNEL_EXTRAVERSION))
58 # The base ID doesn't have to be accurate; we only use it for
59 # feature checks which will not care about extraversion bits
60 #
61 override KERNEL_BASE_ID := \
62 $(KERNEL_VERSION).$(KERNEL_PATCHLEVEL).$(KERNEL_SUBLEVEL)
64 # Try to get the kernel ID from the kernel.release file.
65 #
66 KERNEL_ID ?= \
67 $(shell cat $(KERNELDIR)/include/config/kernel.release 2>/dev/null)
69 # If the kernel ID isn't set yet, try to set it from the UTS_RELEASE
70 # macro.
71 #
72 ifeq ($(strip $(KERNEL_ID)),)
73 KERNEL_ID := \
74 $(shell grep -h '\#define UTS_RELEASE' \
75 $(KERNELDIR)/include/linux/* | cut -f3 -d' ' | sed s/\"//g)
76 endif
78 ifeq ($(strip $(KERNEL_ID)),)
79 KERNEL_ID := \
80 $(KERNEL_VERSION).$(KERNEL_PATCHLEVEL).$(KERNEL_SUBLEVEL)$(KERNEL_EXTRAVERSION)
81 endif
83 # Return 1 if the kernel version is at least the value passed to the
84 # function, else return nothing.
85 # Examples
86 # $(call kernel-version-at-least,2,6,35)
87 # $(call kernel-version-at-least,2,6,35,7)
88 #
89 define kernel-version-at-least
90 $(shell set -- $(kernel_version_as_list) 0 0 0 0; \
91 Y=true; \
92 for D in $1 $2 $3 $4; \
93 do \
94 [ $$1 ] || break; \
95 [ $$1 -eq $$D ] && { shift; continue; };\
96 [ $$1 -lt $$D ] && Y=; \
97 break; \
98 done; \
99 echo $$Y)
100 endef