meson.build

project('pyFAI',
  'c', 'cpp', 'cython',
  license: 'MIT',
  meson_version: '>= 1.1',
  version: run_command(['version.py', '--wheel'],
                       check:true).stdout().strip(),
  default_options: ['buildtype=plain', ],
)

py_mod = import('python')
py = py_mod.find_installation()
os = import('fs')

# Seek the backend
if meson.backend() != 'ninja'
  error('Ninja backend required')
endif

# How to disable OpenMP:
# The 'PYFAI_WITH_OPENMP' file should contain 'False'
if os.is_file('PYFAI_WITH_OPENMP')
  openmp_var = os.read('PYFAI_WITH_OPENMP').strip()
else
  res = run_command(py, '-c', 'import os; print(os.environ["PYFAI_WITH_OPENMP"])',
                    check:false)
  if res.returncode() == 0
    openmp_var = res.stdout().strip()
  else
    openmp_var = ''
  endif
endif

cc = meson.get_compiler('c')
cpp = meson.get_compiler('cpp')
cy = meson.get_compiler('cython')
# We need -lm for all C code (assuming it uses math functions, which is safe).
# For C++ it isn't needed, because libstdc++/libc++ is guaranteed to depend on it.
m_dep = cc.find_library('m', required : false)
if m_dep.found()
  add_project_link_arguments('-lm', language : 'c')
endif

# https://mesonbuild.com/Python-module.html
py_dep = py.dependency()

py.install_sources([
    'version.py',
],
  pure: false,    # Will be installed next to binaries
  subdir: 'pyFAI'  # Folder relative to site-packages to install to
)

subdir('src/pyFAI')