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zosccompiler.py
"""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 CompileError, DistutilsExecError from .unixccompiler import UnixCCompiler _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 zOSCCompiler(UnixCCompiler): 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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