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"""distutils.zosccompiler
Contains the selection of the c & c++ compilers on z/OS. There are several
different c compilers on z/OS, all of them are optional, so the correct
one needs to be chosen based on the users input. This is compatible with
the following compilers:
IBM C/C++ For Open Enterprise Languages on z/OS 2.0
IBM Open XL C/C++ 1.1 for z/OS
IBM XL C/C++ V2.4.1 for z/OS 2.4 and 2.5
IBM z/OS XL C/C++
"""
import os
from ... import sysconfig
from ...errors import DistutilsExecError
from . import unix
from .errors import CompileError
_cc_args = {
'ibm-openxl': [
'-m64',
'-fvisibility=default',
'-fzos-le-char-mode=ascii',
'-fno-short-enums',
],
'ibm-xlclang': [
'-q64',
'-qexportall',
'-qascii',
'-qstrict',
'-qnocsect',
'-Wa,asa,goff',
'-Wa,xplink',
'-qgonumber',
'-qenum=int',
'-Wc,DLL',
],
'ibm-xlc': [
'-q64',
'-qexportall',
'-qascii',
'-qstrict',
'-qnocsect',
'-Wa,asa,goff',
'-Wa,xplink',
'-qgonumber',
'-qenum=int',
'-Wc,DLL',
'-qlanglvl=extc99',
],
}
_cxx_args = {
'ibm-openxl': [
'-m64',
'-fvisibility=default',
'-fzos-le-char-mode=ascii',
'-fno-short-enums',
],
'ibm-xlclang': [
'-q64',
'-qexportall',
'-qascii',
'-qstrict',
'-qnocsect',
'-Wa,asa,goff',
'-Wa,xplink',
'-qgonumber',
'-qenum=int',
'-Wc,DLL',
],
'ibm-xlc': [
'-q64',
'-qexportall',
'-qascii',
'-qstrict',
'-qnocsect',
'-Wa,asa,goff',
'-Wa,xplink',
'-qgonumber',
'-qenum=int',
'-Wc,DLL',
'-qlanglvl=extended0x',
],
}
_asm_args = {
'ibm-openxl': ['-fasm', '-fno-integrated-as', '-Wa,--ASA', '-Wa,--GOFF'],
'ibm-xlclang': [],
'ibm-xlc': [],
}
_ld_args = {
'ibm-openxl': [],
'ibm-xlclang': ['-Wl,dll', '-q64'],
'ibm-xlc': ['-Wl,dll', '-q64'],
}
# Python on z/OS is built with no compiler specific options in it's CFLAGS.
# But each compiler requires it's own specific options to build successfully,
# though some of the options are common between them
class Compiler(unix.Compiler):
src_extensions = ['.c', '.C', '.cc', '.cxx', '.cpp', '.m', '.s']
_cpp_extensions = ['.cc', '.cpp', '.cxx', '.C']
_asm_extensions = ['.s']
def _get_zos_compiler_name(self):
zos_compiler_names = [
os.path.basename(binary)
for envvar in ('CC', 'CXX', 'LDSHARED')
if (binary := os.environ.get(envvar, None))
]
if len(zos_compiler_names) == 0:
return 'ibm-openxl'
zos_compilers = {}
for compiler in (
'ibm-clang',
'ibm-clang64',
'ibm-clang++',
'ibm-clang++64',
'clang',
'clang++',
'clang-14',
):
zos_compilers[compiler] = 'ibm-openxl'
for compiler in ('xlclang', 'xlclang++', 'njsc', 'njsc++'):
zos_compilers[compiler] = 'ibm-xlclang'
for compiler in ('xlc', 'xlC', 'xlc++'):
zos_compilers[compiler] = 'ibm-xlc'
return zos_compilers.get(zos_compiler_names[0], 'ibm-openxl')
def __init__(self, verbose=False, dry_run=False, force=False):
super().__init__(verbose, dry_run, force)
self.zos_compiler = self._get_zos_compiler_name()
sysconfig.customize_compiler(self)
def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
local_args = []
if ext in self._cpp_extensions:
compiler = self.compiler_cxx
local_args.extend(_cxx_args[self.zos_compiler])
elif ext in self._asm_extensions:
compiler = self.compiler_so
local_args.extend(_cc_args[self.zos_compiler])
local_args.extend(_asm_args[self.zos_compiler])
else:
compiler = self.compiler_so
local_args.extend(_cc_args[self.zos_compiler])
local_args.extend(cc_args)
try:
self.spawn(compiler + local_args + [src, '-o', obj] + extra_postargs)
except DistutilsExecError as msg:
raise CompileError(msg)
def runtime_library_dir_option(self, dir):
return '-L' + dir
def link(
self,
target_desc,
objects,
output_filename,
output_dir=None,
libraries=None,
library_dirs=None,
runtime_library_dirs=None,
export_symbols=None,
debug=False,
extra_preargs=None,
extra_postargs=None,
build_temp=None,
target_lang=None,
):
# For a built module to use functions from cpython, it needs to use Pythons
# side deck file. The side deck is located beside the libpython3.xx.so
ldversion = sysconfig.get_config_var('LDVERSION')
if sysconfig.python_build:
side_deck_path = os.path.join(
sysconfig.get_config_var('abs_builddir'),
f'libpython{ldversion}.x',
)
else:
side_deck_path = os.path.join(
sysconfig.get_config_var('installed_base'),
sysconfig.get_config_var('platlibdir'),
f'libpython{ldversion}.x',
)
if os.path.exists(side_deck_path):
if extra_postargs:
extra_postargs.append(side_deck_path)
else:
extra_postargs = [side_deck_path]
# Check and replace libraries included side deck files
if runtime_library_dirs:
for dir in runtime_library_dirs:
for library in libraries[:]:
library_side_deck = os.path.join(dir, f'{library}.x')
if os.path.exists(library_side_deck):
libraries.remove(library)
extra_postargs.append(library_side_deck)
break
# Any required ld args for the given compiler
extra_postargs.extend(_ld_args[self.zos_compiler])
super().link(
target_desc,
objects,
output_filename,
output_dir,
libraries,
library_dirs,
runtime_library_dirs,
export_symbols,
debug,
extra_preargs,
extra_postargs,
build_temp,
target_lang,
)
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