Function make_build

emsdk.py:965–999

(build_root, build_type)

def make_build(build_root, build_type):
  debug_print(f'make_build(build_root={build_root}, build_type={build_type})')
  if CPU_CORES > 1:
    print(f'Performing a parallel build with {CPU_CORES} cores.')
  else:
    print('Performing a singlethreaded build.')

  make = [find_cmake(), '--build', '.', '--config', build_type]
  if 'Visual Studio' in CMAKE_GENERATOR:
    # Visual Studio historically has had a two-tier problem in its build system design. A single MSBuild.exe instance only governs
    # the build of a single project (.exe/.lib/.dll) in a solution. Passing the -j parameter above will only enable multiple MSBuild.exe
    # instances to be spawned to build multiple projects in parallel, but each MSBuild.exe is still singlethreaded.
    # To enable each MSBuild.exe instance to also compile several .cpp files in parallel inside a single project, pass the extra
    # MSBuild.exe specific "Multi-ToolTask" (MTT) setting /p:CL_MPCount. This enables each MSBuild.exe to parallelize builds wide.
    # This requires CMake 3.12 or newer.
    make += ['-j', str(CPU_CORES), '--', '/p:CL_MPCount=' + str(CPU_CORES)]
  else:
    # Pass -j to native make, CMake might not support -j option.
    make += ['--', '-j', str(CPU_CORES)]

  # Build
  try:
    print('Running build: ' + str(make))
    ret = subprocess.check_call(make, cwd=build_root, env=build_env())
    if ret != 0:
      errlog(f'Build failed with exit code {ret}!')
      errlog('Working directory: ' + build_root)
      return False
  except Exception as e:
    errlog('Build failed due to exception!')
    errlog('Working directory: ' + build_root)
    errlog(str(e))
    return False

  return True


def cmake_configure(generator, build_root, src_root, build_type, extra_cmake_args):