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kernel.mk: add a new helper for comparing kernel versions, which can take 1 - 4 field kernel versions

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implement CompareKernelPatchVer using this new helper
implement kernel_patchver_{gt,ge,eq,le,lt}, which are more convenient for use with inline $(if)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27087 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2011-06-01 18:08:17 +00:00
parent 8f120f03ef
commit f9794518c7
1 changed files with 13 additions and 4 deletions
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17
include/kernel.mk
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@ -161,11 +161,20 @@ define AutoLoad
add_module "$(1)" "$(2)" "$(3)";
endef
version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
ifdef DUMP
CompareKernelPatchVer=0
kernel_version_cmp=
else
define CompareKernelPatchVer
$(shell [ $$(echo $(1) | tr . 0) -$(2) $$(echo $(3) | tr . 0) ] && echo 1 || echo 0)
endef
kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
endif
CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
kernel_patchver_le=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
kernel_patchver_lt=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))