meson helper for efl

samepl.build

#We need:
# meson.current_build_dir()
# meson.current_source_dir()
# pub_eo_files
# priv_eo_files
# dir_package_include

#we define
# pub_eo_file_target
# priv_eo_file_target
# eo_file_targets

pub_eo_file_target = []
foreach eo_file : pub_eo_files
  pub_eo_file_target += custom_target('eolian_gen_' + eo_file,
    input : eo_file,
    output : [eo_file + '.h'],
    install : true,
    install_dir : dir_package_include,
    command : [eolian_gen, '-I', meson.current_source_dir(), eolian_include_directories,
                           '-o', 'h:' + join_paths(meson.current_build_dir(), eo_file + '.h'),
                           '-o', 'c:' + join_paths(meson.current_build_dir(), eo_file + '.c'),
                           '-gch', '@INPUT@'])
endforeach

priv_eo_file_target = []
foreach eo_file : priv_eo_files
  priv_eo_file_target += custom_target('eolian_gen_' + eo_file,
    input : eo_file,
    output : [eo_file + '.h'],
    command : [eolian_gen, '-I', meson.current_source_dir(), eolian_include_directories,
                           '-o', 'h:' + join_paths(meson.current_build_dir(), eo_file + '.h'),
                           '-o', 'c:' + join_paths(meson.current_build_dir(), eo_file + '.c'),
                           '-gch', '@INPUT@'])
endforeach

eo_file_targets = pub_eo_file_target + priv_eo_file_target

eolian_include_directories += ['-I', meson.current_source_dir()]