[英]How to check kernel version in Makefile
How can I check my kernel version in my Makefile ??如何在我的 Makefile 中检查我的内核版本?
Based on the kernel version I want to select some of the header files accordingly.根据内核版本,我想相应地选择一些头文件。
If you are coding some application, you might do如果你正在编写一些应用程序,你可能会这样做
KERNELVERSION=$(shell uname -a)
or some other shell command, perhaps cat /proc/version
或其他一些 shell 命令,可能是cat /proc/version
For a kernel module, see cnicutar's answer .对于内核模块,请参阅cnicutar 的回答。
KVER = $(shell uname -r)
KMAJ = $(shell echo $(KVER) | \
sed -e 's/^\([0-9][0-9]*\)\.[0-9][0-9]*\.[0-9][0-9]*.*/\1/')
KMIN = $(shell echo $(KVER) | \
sed -e 's/^[0-9][0-9]*\.\([0-9][0-9]*\)\.[0-9][0-9]*.*/\1/')
KREV = $(shell echo $(KVER) | \
sed -e 's/^[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*/\1/')
kver_ge = $(shell \
echo test | awk '{if($(KMAJ) < $(1)) {print 0} else { \
if($(KMAJ) > $(1)) {print 1} else { \
if($(KMIN) < $(2)) {print 0} else { \
if($(KMIN) > $(2)) {print 1} else { \
if($(KREV) < $(3)) {print 0} else { print 1 } \
}}}}}' \
)
ifeq ($(call kver_ge,3,8,0),1)
echo great or equal than 3.8.0
else
echo less than 3.8.0
endif
I don't have 50 reputation so I can't answer Mr. voght's comment in a comment (upvote me so I can!) but I can do so just as another answer, so here goes.我没有 50 声望,所以我无法在评论中回答 voght 先生的评论(给我点赞,这样我就可以了!)但我可以这样做,就像另一个答案一样,所以在这里。
The code uses the shell built-in to shell out ( bash ) commands like uname and echo , and assign variable-like macros such as KVER
to the result.该代码使用内置的 shell 来输出( bash )命令,如uname和echo ,并将类似变量的宏(如KVER
给结果。 uname provides the kernel version, the code goes on to use the unix sed (stream editor; man sed for more) to extract each of the major, minor and rev numbers from the results and assign them to discrete variable-like macros. uname提供内核版本,代码继续使用 unix sed (流编辑器; man sed获取更多信息)从结果中提取每个主要、次要和 rev 编号,并将它们分配给离散变量类宏。 Then he assigns a macro name, kver_ge
to the process (using awk , test , and if shell built-ins) of testing whether the kernel version is greater than the one provided as an argument.然后,他将宏名称kver_ge
分配给测试内核版本是否大于作为参数提供的版本的过程(使用awk 、 test和if shell 内置函数)。 Pretty cool, works for me.很酷,对我有用。
A simple way is to first assign a variable true/false (actually 1/0 in example below) by a test in Makefile and then use ifeq command like the answer from goodgoodstudydaydayup, here is a simpler approach:一个简单的方法是首先通过 Makefile 中的测试分配一个变量 true/false(在下面的示例中实际上是 1/0),然后使用 ifeq 命令,就像 goodgoodstudydaydayup 的答案一样,这里有一个更简单的方法:
KERNEL_GT_5_4 = $(shell expr `uname -r` \> "5.4.0-0-generic")
all:
ifeq (${KERNEL_GT_5_4},1)
echo greater than 5.4.0-0-generic
else
echo less than 5.4.0-0-generic
endif
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