Compilation Prerequisite Details?

[docrjh]

Compilation Prerequisite Details?

[pstolarz]

Hi Richard,
The problem is associated with lack of headers corresponding to the version of kernel you use (4.4.34).
If you want compile the module directly on the platform try this:

• clone kernel src-tree corresponding to your ver of kernel:

  git clone --depth 1 --branch 38f2800e6e94019a00a2880bfed8fba37aea2e5d https://github.com/raspberrypi/linux

  NOTE: 38f2800e commit corresponds to 4.4.33 kernel since I don't see 4.4.34 on the raspberry/firmware repo. Should you had have problems with loading the module for this version of kernel src-tree, you may want to check commits later to this commit for compilation.

• compile the module with

  KERNEL_SRC=<path to kernel src-tree> make

[docrjh]

Hi
Thanks for the very quick reply.
Unfortunately, the clone request came back remote branch not found. Any ideas?
log
pi@raspberrypi:~/w1-gpio-cl $ sudo git clone --depth 1 --branch 38f2800e6e94019a00a2880bfed8fba37aea2e5d https://github.com/raspberrypi/linux
Cloning into 'linux'...
warning: Could not find remote branch 38f2800e6e94019a00a2880bfed8fba37aea2e5d to clone.
fatal: Remote branch 38f2800e6e94019a00a2880bfed8fba37aea2e5d not found in upstream origin

[pstolarz]

So try this:

git clone --branch rpi-4.4.y --depth 1000 https://github.com/raspberrypi/linux
cd linux
git checkout 38f2800e6e94019a00a2880bfed8fba37aea2e5d
export KERNEL_SRC=$(pwd)
make bcmrpi_defconfig modules_prepare

Hope, now you should be able to compile the module by make in its directory.

[docrjh]

Hi, OK, I managed to clone linux and the git checkout and export seemed to work but make bcmrpi appears to fail. please see log bellow.

log
pi@raspberrypi:~ $ cd linux
pi@raspberrypi:/linux $ sudo git checkout 38f2800e6e94019a00a2880bfed8fba37aea2e5d
HEAD is now at 38f2800... Merge remote-tracking branch 'stable/linux-4.4.y' into rpi-4.4.y
pi@raspberrypi:/linux $ export KERNEL_SRC=$(pwd)
pi@raspberrypi:~/linux $ sudo make bcmrpi_defconfig modules_prepare

configuration written to .config

scripts/kconfig/conf --silentoldconfig Kconfig
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
make[2]: 'include/generated/mach-types.h' is up to date.
CHK include/generated/bounds.h
CHK include/generated/timeconst.h
/bin/sh: 1: bc: not found
Kbuild:66: recipe for target 'include/generated/timeconst.h' failed
make[2]: *** [include/generated/timeconst.h] Error 127
Makefile:1003: recipe for target 'prepare0' failed
make[1]: *** [prepare0] Error 2
Makefile:520: recipe for target '__build_one_by_one' failed
make: *** [__build_one_by_one] Error 2

cd to w1-gpio-cl dir
pi@raspberrypi:/w1-gpio-cl $ sudo KERNEL_SRC=/home/pi/linux make
`gen-mast.h' has been generated.
make -C /home/pi/linux M= modules
make[1]: Entering directory '/home/pi/linux'
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
make[2]: 'include/generated/mach-types.h' is up to date.
CHK include/generated/bounds.h
CHK include/generated/timeconst.h
/bin/sh: 1: bc: not found
Kbuild:66: recipe for target 'include/generated/timeconst.h' failed
make[2]: *** [include/generated/timeconst.h] Error 127
Makefile:1003: recipe for target 'prepare0' failed
make[1]: *** [prepare0] Error 2
make[1]: Leaving directory '/home/pi/linux'
Makefile:13: recipe for target 'all' failed
make: *** [all] Error 2
pi@raspberrypi:~/w1-gpio-cl $

[pstolarz]

As stated in README bc is required to build the module/kernel. Install its package.
sudo apt-get install bc

[pstolarz]

README has been updated. If more info is needed reopen the issue or provide your pull request.