Replace PWD=$(pwd) with PWD=$(shell pwd) On Mon, Feb 16, 2015 at 1:53 PM, Paul Bolle <[email protected]> wrote:
> On Mon, 2015-02-16 at 12:14 +0530, noyb noybee wrote: > > Hi all. This is the error that I am getting when I try to compile a > > loadable module(it tries to intercept a system call by directly > > editing the sys_call_table in the memory):- > > > > make -C /lib/modules/2.6.32-504.1.3.el6.x86_64/build M= modules > > make[1]: Entering directory `/usr/src/kernels/2.6.32-504.1.3.el6.x86_64' > > make[2]: Nothing to be done for `all'. > > CHK include/linux/version.h > > CHK include/linux/utsrelease.h > > SYMLINK include/asm -> include/asm-x86 > > make[2]: *** No rule to make target `missing-syscalls'. Stop. > > make[1]: *** [prepare0] Error 2 > > make[1]: Leaving directory `/usr/src/kernels/2.6.32-504.1.3.el6.x86_64' > > make: *** [all] Error 2 > > > > The Makefile is:- > > > > obj-m +:= hijack.o > > You want ":=" here. "+:=" gives > Makefile:1: *** empty variable name. Stop. > > when I try it. > > > PWD := $(pwd) > > I think this line sets the value of variable PWD to the value of the > variable pwd, which is probably empty. Look at "M=" in the output you > quoted above. > > > all: > > make -C /lib/modules/2.6.32-504.1.3.el6.x86_64/build M=$(PWD) > modules > > clean: > > make -C /lib/modules/2.6.32-504.1.3.el6.x86_64/build M=$(PWD) > clean > > > > I have googled the error but most links are unresolved. I am trying to > > install this against the currently running kernel and not the complete > > source. > > I'm not sure what you're trying to do here, and I'm not really > comfortable reading Makefiles. But the examples in "3. Creating a Kbuild > File for an External Module" in Documentation/kbuild/modules.txt suggest > you could also drop the assignment to PWD and use 'M=$$PWD' in those two > lines. > > Hope this helps, > > > Paul Bolle > > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >
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