xtensor-blas-pkgbuild/PKGBUILD

# Maintainer: Alexander Susha <isushik94@gmail.com>
_base=xtensor-blas
pkgname=xtensor-${_base}-git
pkgver=0.19.1.9.g7ceb791
pkgrel=1
pkgdesc="QuantStack tools library - Multi-dimensional arrays with broadcasting and lazy computing."
arch=('x86_64')
url="https://github.com/QuantStack/${_base}"
license=('BSD-3-Clause')
depends=('xtensor>=0.19.0' 'blas' 'lapack')
makedepends=('cmake')
source=("git+${url}")
md5sums=('SKIP')
provides=("$[_base]=$(printf ${pkgver} | cut -d'.' -f1,2,3)")
replaces=("$[_base]")
conflicts=("${_base}")

#  From UPC: Building And Using Static And Shared "C"
#  Libraries.html
# #+begin_QUOTE
# we need that all jump calls ("goto", in assembly speak)
# and subroutine calls will use relative addresses, and not
# absolute addresses. Thus, we need to use ... ~-fPIC~ or
# ~-fpic~
# #+end_QUOTE
#
#  From makepkg.conf
# -march (or -mcpu) builds exclusively for an architecture
# -mtune optimizes for an architecture, but builds for
#  whole processor family
#
# -O3 optimises
#
# -D-FORTIFY-SOURCE=2
# | https://stackoverflow.com/a/16604146
# |- man 7 feature_test_macros
# checks to be performed to detect some buffer overflow
# errors when employing various string and memory
# manipulation functions ... some  conforming programs
# might fail
#
# -fcf-protection
# | Info pages for gcc (gnu compiler collection)
# intended to protect against such threats as
# Return-oriented Programming (ROP), and similarly
# call/jmp-oriented programming (COP/JOP)
#
# -pipe
# | Info pages for gcc (controlling the kind of output)
# Use pipes rather than temporary files for communication
# between the various stages of compilation
#
# -fno-plt
# | Info pages for gcc (code generation conventions)
# leads to more efficient code by eliminating PLT stubs and
# exposing GOT loads to optimizations
#
# -fopenmp
# | Info pages for gcc (controlling c dialect)
# Enable handling of OpenMP directives
#

safe_flags="-Wp,-D_FORTIFY_SOURCE=2,-D_GLIBCXX_ASSERTIONS"
safe_flags+=" -fcf-protection -fno-plt"
safe_flags+=" -fstack-clash-protection -Wformat"
safe_flags+=" -Werror=format-security"
generic_flags="-pipe -fno-plt -fPIC -fopenmp -march=native"
generic_flags+=" -mtune=native ${safe_flags}"
opt_flags="${generic_flags} -O3"
generic_flags="${generic_flags} -O2"

COPTFLAGS="${opt_flags}"
CXXOPTFLAGS="$COPTFLAGS"
FOPTFLAGS="$COPTFLAGS"
CPPFLAGS="$generic_flags"
CXXFLAGS="$CPPFLAGS"
CFLAGS="$generic_flags"
FFLAGS="$generic_flags"
FCFLAGS="$generic_flags"
F90FLAGS="$generic_flags"
F77FLAGS="$generic_flags"

export LANG=en_IE.UTF-8
export LC_ALL=en_IE.UTF-8

pkgver() {
  cd "${srcdir}/${_base}"
  git describe --tags --match '*.*' | tr '-' '.'
}

build() {
  cd "${_base}"
  [ ! -d build ] && mkdir build
  cd build
  cmake \
    -DCMAKE_INSTALL_PREFIX=${pkgdir}/usr \
    -DCMAKE_INSTALL_LIBDIR=lib \
    ..
  make
}

package() {
  cd "${_base}/build"
  make install
}