Arch Linux User Repository

This package have several variables to enable/disable features.

##
## The following variables can be customized at build time. Use env or export to change at your wish
##
##   Example: env _microarchitecture=98 use_numa=n use_tracers=n makepkg -sc
##
## Look inside 'choose-gcc-optimization.sh' to choose your microarchitecture
## Valid numbers between: 0 to 99
## Default is: 0 => generic
## Good option if your package is for one machine: 98 (Intel native) or 99 (AMD native)
if [ -z ${_microarchitecture+x} ]; then
  _microarchitecture=0
fi

## Disable NUMA since most users do not have multiple processors. Breaks CUDA/NvEnc.
## Archlinux and Xanmod enable it by default.
## Set variable "use_numa" to: n to disable (possibly increase performance)
##                             y to enable  (stock default)
if [ -z ${use_numa+x} ]; then
  use_numa=y
fi

## Since upstream disabled CONFIG_STACK_TRACER (limits debugging and analyzing of the kernel)
## you can enable them setting this option. Caution, because they have an impact in performance.
## Stock Archlinux has this enabled. 
## Set variable "use_tracers" to: n to disable (possibly increase performance, XanMod default)
##                                y to enable  (Archlinux default)
if [ -z ${use_tracers+x} ]; then
  use_tracers=n
fi

# Unique compiler supported upstream is GCC
## Choose between GCC and CLANG config (default is GCC)
## Use the environment variable "_compiler=clang"
if [ "${_compiler}" = "clang" ]; then
  _compiler_flags="CC=clang HOSTCC=clang LLVM=1 LLVM_IAS=1"
fi

# Choose between the 4 main configs for stable branch. Default x86-64-v1 which use CONFIG_GENERIC_CPU2:
# Possible values: config_x86-64-v1 (default) / config_x86-64-v2 / config_x86-64-v3 / config_x86-64-v4
# This will be overwritten by selecting any option in microarchitecture script
# Source files: https://github.com/xanmod/linux/tree/5.17/CONFIGS/xanmod/gcc
if [ -z ${_config+x} ]; then
  _config=config_x86-64-v1
fi

# Compress modules with ZSTD (to save disk space)
if [ -z ${_compress_modules+x} ]; then
  _compress_modules=n
fi

# Compile ONLY used modules to VASTLY reduce the number of modules built
# and the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD read the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
if [ -z ${_localmodcfg} ]; then
  _localmodcfg=n
fi

# Tweak kernel options prior to a build via nconfig
if [ -z ${_makenconfig} ]; then
  _makenconfig=n
fi

Personally I'm running now xanmod kernel compiled with this:

env _microarchitecture=98 use_tracers=n use_numa=n _localmodcfg=y _compress_modules=y makepkg -sic

Also, you can now create the file myconfig in your local repo to build this package with a custom config or use ${XDG_CONFIG_HOME}/linux-xanmod/myconfig. This file can be a full kernel config or be a script with several entries to add/remove options (you have several examples in PKGBUILD by using scripts/config):

Code involved:

  for _myconfig in "${SRCDEST}/myconfig" "${HOME}/.config/linux-xanmod/myconfig" "${XDG_CONFIG_HOME}/linux-xanmod/myconfig" ; do
    if [ -f "${_myconfig}" ] && [ "$(wc -l <"${_myconfig}")" -gt "0" ]; then
      if grep -q 'scripts/config' "${_myconfig}"; then
        # myconfig is a partial file. Executing as a script
        msg2 "Applying myconfig..."
        bash -x "${_myconfig}"
      else
        # myconfig is a full config file. Replacing default .config
        msg2 "Using user CUSTOM config..."
        cp -f "${_myconfig}" .config
      fi
      echo
      break
    fi
  done

@ishitatsuyuki you can use arch's stock config in myconfig, but I haven't compared both configs for a long time, but in the past, xanmod set some options to tune a little the kernel performance, so if you compile with stock, probably you will get a stock like kernel... For time, just use modprobed-db which compile just the modules you are using in your particular system.

Can we get a Arch stock-like config since the package compiled with default config seems to contain a way larger superset of modules? Or should I just copy Arch's config as myconfig and that would work?

try new implementations described before?

at least - it builds flawelessly - and with a multi-screen "patched <filename>" info.

maybe - worth it.)

Please, some testers to try new implementations described before?

https://mirror.lnx.im/tests/linux-xanmod-5.5.10-2.src.tar.gz

Thank you!

@Tjuh I think that autofs4 is enabled by this conf: CONFIG_AUTOFS4_FS

I'm working on a new code that allow user to use myconfig file to set any option during prepare(), instead of provide a full config file, you can enable or disable a single or multiple options. So if you have a file named "myconfig" in package source directory:

 % cat myconfig
scripts/config --enable CONFIG_AUTOFS4_FS

then this config will be enabled in prepare(). Sounds good?

Of course if myconfig is a full config file, will be replaced as always.

Getting this msg in my journal log: Failed to find module 'autofs4'

Doesn't seem to cause any trouble tho.

@enihcam makedepends are the same in all kernel packages:

https://git.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/linux&id=5defcdf6979d2c25aa9dddb868da41f53ed48671

Full sources was a legacy from the original package. Indeed I can pull linux and then apply the patch from xanmod. Let me test it and maybe I push it when a new release is out. Thanks!

Also, instead of to download a complete xanmod source package, can we download original kernel + xanmod patch. this is because github is slow in some countries. doing so would allow users download original kernel from local cdn. thanks again.

Why do we need "cpio python-sphinx python-sphinx_rtd_theme graphviz imagemagick" in makedepends? I can build the package without them.

@figue just nconfig (same as linux-ck) would be good enough. thanks.