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How to create linux header right in "lib/modules"

dkn
Intellectual 730 points

Hello,

When compile modules " make modules_install INSTALL_MOD_PATH=.", I got "lib/modules/build" and "lib/modules/source" both point to Linux kernel folder on my Linux build host.

What should I do to make it portable in creating independent "build" and "source", ie. not point to Linux build host ?

Thanks,

~Duy-Ky

  • 0
    TI__Guru** 116100 points
    Do you want to build the module with just linux headers and not with source ?

    Actually we have to provide the "rootfs" path when you use the following command.

    Ex:
    make modules_install INSTALL_MOD_PATH=/media/rootfs
  • 0 in reply to Titusrathinaraj Stalin
    Intellectual 730 points
    I did just that and found 2 folder "build" and "source" point to linux folder on Linux build machine!~
    How to fix it ?
    Thanks,

    ~Duy-Ky
  • 0 in reply to dkn
    TI__Guru** 116100 points
    Hi,
    You would get only "lib" folder when you do "modules_install"
    Use the following command and make sure.
    mkdir ./tmp
    make modules_install INSTALL_MOD_PATH=./tmp ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-



    When compile modules " make modules_install INSTALL_MOD_PATH=.", I got "lib/modules/build" and "lib/modules/source" both point to Linux kernel folder on my Linux build host.

    From your command, you are saving those modules information in current directory (.) which is linux source directory, so please note that we have also "lib" directory in linux source , it could lead to some understanding problem, create tmp directory and copy that module information to there.
  • 0 in reply to Titusrathinaraj Stalin
    Intellectual 730 points

    I did what you recommended, but still have the same problem.

    Here's what it looks

    tmp

       lib

          modules

             3.12.10-ti2013.12.01

                build -> linux-folder

                 source-> linux-folder

               kernel

                  ..............

                  ..............

    I'm using Ubuntu-12

    Thanks,

     

    ~Duy-Ky

     

     

     

     

  • 0 in reply to dkn
    TI__Guru** 116100 points
    Hi,
    You can modify the "modules_install" in Makefile of Linux source.

    Try to comment out the "ln -s" lines like below.

    # Target to install modules
    PHONY += modules_install
    modules_install: _modinst_ _modinst_post

    PHONY += _modinst_
    _modinst_:
    @rm -rf $(MODLIB)/kernel
    @rm -f $(MODLIB)/source
    @mkdir -p $(MODLIB)/kernel
    # @ln -s $(srctree) $(MODLIB)/source
    @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
    rm -f $(MODLIB)/build ; \
    # ln -s $(objtree) $(MODLIB)/build ; \
    fi
    @cp -f $(objtree)/modules.order $(MODLIB)/
    @cp -f $(objtree)/modules.builtin $(MODLIB)/
    $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  • 0 in reply to Titusrathinaraj Stalin
    Intellectual 730 points

    It works now

    Thanks so much, Titusrathinara

    ~Duy-Ky

  • 0 in reply to dkn
    TI__Guru** 116100 points
    Thanks for your update.