/usr/lib/python3.4/distutils/command/config.py is in libpython3.4-stdlib 3.4.3-1ubuntu1~14.04.7.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 | """distutils.command.config
Implements the Distutils 'config' command, a (mostly) empty command class
that exists mainly to be sub-classed by specific module distributions and
applications. The idea is that while every "config" command is different,
at least they're all named the same, and users always see "config" in the
list of standard commands. Also, this is a good place to put common
configure-like tasks: "try to compile this C code", or "figure out where
this header file lives".
"""
import sys, os, re
from distutils.core import Command
from distutils.errors import DistutilsExecError
from distutils.sysconfig import customize_compiler
from distutils import log
LANG_EXT = {"c": ".c", "c++": ".cxx"}
class config(Command):
description = "prepare to build"
user_options = [
('compiler=', None,
"specify the compiler type"),
('cc=', None,
"specify the compiler executable"),
('include-dirs=', 'I',
"list of directories to search for header files"),
('define=', 'D',
"C preprocessor macros to define"),
('undef=', 'U',
"C preprocessor macros to undefine"),
('libraries=', 'l',
"external C libraries to link with"),
('library-dirs=', 'L',
"directories to search for external C libraries"),
('noisy', None,
"show every action (compile, link, run, ...) taken"),
('dump-source', None,
"dump generated source files before attempting to compile them"),
]
# The three standard command methods: since the "config" command
# does nothing by default, these are empty.
def initialize_options(self):
self.compiler = None
self.cc = None
self.include_dirs = None
self.libraries = None
self.library_dirs = None
# maximal output for now
self.noisy = 1
self.dump_source = 1
# list of temporary files generated along-the-way that we have
# to clean at some point
self.temp_files = []
def finalize_options(self):
if self.include_dirs is None:
self.include_dirs = self.distribution.include_dirs or []
elif isinstance(self.include_dirs, str):
self.include_dirs = self.include_dirs.split(os.pathsep)
if self.libraries is None:
self.libraries = []
elif isinstance(self.libraries, str):
self.libraries = [self.libraries]
if self.library_dirs is None:
self.library_dirs = []
elif isinstance(self.library_dirs, str):
self.library_dirs = self.library_dirs.split(os.pathsep)
def run(self):
pass
# Utility methods for actual "config" commands. The interfaces are
# loosely based on Autoconf macros of similar names. Sub-classes
# may use these freely.
def _check_compiler(self):
"""Check that 'self.compiler' really is a CCompiler object;
if not, make it one.
"""
# We do this late, and only on-demand, because this is an expensive
# import.
from distutils.ccompiler import CCompiler, new_compiler
if not isinstance(self.compiler, CCompiler):
self.compiler = new_compiler(compiler=self.compiler,
dry_run=self.dry_run, force=1)
customize_compiler(self.compiler)
if self.include_dirs:
self.compiler.set_include_dirs(self.include_dirs)
if self.libraries:
self.compiler.set_libraries(self.libraries)
if self.library_dirs:
self.compiler.set_library_dirs(self.library_dirs)
def _gen_temp_sourcefile(self, body, headers, lang):
filename = "_configtest" + LANG_EXT[lang]
file = open(filename, "w")
if headers:
for header in headers:
file.write("#include <%s>\n" % header)
file.write("\n")
file.write(body)
if body[-1] != "\n":
file.write("\n")
file.close()
return filename
def _preprocess(self, body, headers, include_dirs, lang):
src = self._gen_temp_sourcefile(body, headers, lang)
out = "_configtest.i"
self.temp_files.extend([src, out])
self.compiler.preprocess(src, out, include_dirs=include_dirs)
return (src, out)
def _compile(self, body, headers, include_dirs, lang):
src = self._gen_temp_sourcefile(body, headers, lang)
if self.dump_source:
dump_file(src, "compiling '%s':" % src)
(obj,) = self.compiler.object_filenames([src])
self.temp_files.extend([src, obj])
self.compiler.compile([src], include_dirs=include_dirs)
return (src, obj)
def _link(self, body, headers, include_dirs, libraries, library_dirs,
lang):
(src, obj) = self._compile(body, headers, include_dirs, lang)
prog = os.path.splitext(os.path.basename(src))[0]
self.compiler.link_executable([obj], prog,
libraries=libraries,
library_dirs=library_dirs,
target_lang=lang)
if self.compiler.exe_extension is not None:
prog = prog + self.compiler.exe_extension
self.temp_files.append(prog)
return (src, obj, prog)
def _clean(self, *filenames):
if not filenames:
filenames = self.temp_files
self.temp_files = []
log.info("removing: %s", ' '.join(filenames))
for filename in filenames:
try:
os.remove(filename)
except OSError:
pass
# XXX these ignore the dry-run flag: what to do, what to do? even if
# you want a dry-run build, you still need some sort of configuration
# info. My inclination is to make it up to the real config command to
# consult 'dry_run', and assume a default (minimal) configuration if
# true. The problem with trying to do it here is that you'd have to
# return either true or false from all the 'try' methods, neither of
# which is correct.
# XXX need access to the header search path and maybe default macros.
def try_cpp(self, body=None, headers=None, include_dirs=None, lang="c"):
"""Construct a source file from 'body' (a string containing lines
of C/C++ code) and 'headers' (a list of header files to include)
and run it through the preprocessor. Return true if the
preprocessor succeeded, false if there were any errors.
('body' probably isn't of much use, but what the heck.)
"""
from distutils.ccompiler import CompileError
self._check_compiler()
ok = True
try:
self._preprocess(body, headers, include_dirs, lang)
except CompileError:
ok = False
self._clean()
return ok
def search_cpp(self, pattern, body=None, headers=None, include_dirs=None,
lang="c"):
"""Construct a source file (just like 'try_cpp()'), run it through
the preprocessor, and return true if any line of the output matches
'pattern'. 'pattern' should either be a compiled regex object or a
string containing a regex. If both 'body' and 'headers' are None,
preprocesses an empty file -- which can be useful to determine the
symbols the preprocessor and compiler set by default.
"""
self._check_compiler()
src, out = self._preprocess(body, headers, include_dirs, lang)
if isinstance(pattern, str):
pattern = re.compile(pattern)
file = open(out)
match = False
while True:
line = file.readline()
if line == '':
break
if pattern.search(line):
match = True
break
file.close()
self._clean()
return match
def try_compile(self, body, headers=None, include_dirs=None, lang="c"):
"""Try to compile a source file built from 'body' and 'headers'.
Return true on success, false otherwise.
"""
from distutils.ccompiler import CompileError
self._check_compiler()
try:
self._compile(body, headers, include_dirs, lang)
ok = True
except CompileError:
ok = False
log.info(ok and "success!" or "failure.")
self._clean()
return ok
def try_link(self, body, headers=None, include_dirs=None, libraries=None,
library_dirs=None, lang="c"):
"""Try to compile and link a source file, built from 'body' and
'headers', to executable form. Return true on success, false
otherwise.
"""
from distutils.ccompiler import CompileError, LinkError
self._check_compiler()
try:
self._link(body, headers, include_dirs,
libraries, library_dirs, lang)
ok = True
except (CompileError, LinkError):
ok = False
log.info(ok and "success!" or "failure.")
self._clean()
return ok
def try_run(self, body, headers=None, include_dirs=None, libraries=None,
library_dirs=None, lang="c"):
"""Try to compile, link to an executable, and run a program
built from 'body' and 'headers'. Return true on success, false
otherwise.
"""
from distutils.ccompiler import CompileError, LinkError
self._check_compiler()
try:
src, obj, exe = self._link(body, headers, include_dirs,
libraries, library_dirs, lang)
self.spawn([exe])
ok = True
except (CompileError, LinkError, DistutilsExecError):
ok = False
log.info(ok and "success!" or "failure.")
self._clean()
return ok
# -- High-level methods --------------------------------------------
# (these are the ones that are actually likely to be useful
# when implementing a real-world config command!)
def check_func(self, func, headers=None, include_dirs=None,
libraries=None, library_dirs=None, decl=0, call=0):
"""Determine if function 'func' is available by constructing a
source file that refers to 'func', and compiles and links it.
If everything succeeds, returns true; otherwise returns false.
The constructed source file starts out by including the header
files listed in 'headers'. If 'decl' is true, it then declares
'func' (as "int func()"); you probably shouldn't supply 'headers'
and set 'decl' true in the same call, or you might get errors about
a conflicting declarations for 'func'. Finally, the constructed
'main()' function either references 'func' or (if 'call' is true)
calls it. 'libraries' and 'library_dirs' are used when
linking.
"""
self._check_compiler()
body = []
if decl:
body.append("int %s ();" % func)
body.append("int main () {")
if call:
body.append(" %s();" % func)
else:
body.append(" %s;" % func)
body.append("}")
body = "\n".join(body) + "\n"
return self.try_link(body, headers, include_dirs,
libraries, library_dirs)
def check_lib(self, library, library_dirs=None, headers=None,
include_dirs=None, other_libraries=[]):
"""Determine if 'library' is available to be linked against,
without actually checking that any particular symbols are provided
by it. 'headers' will be used in constructing the source file to
be compiled, but the only effect of this is to check if all the
header files listed are available. Any libraries listed in
'other_libraries' will be included in the link, in case 'library'
has symbols that depend on other libraries.
"""
self._check_compiler()
return self.try_link("int main (void) { }", headers, include_dirs,
[library] + other_libraries, library_dirs)
def check_header(self, header, include_dirs=None, library_dirs=None,
lang="c"):
"""Determine if the system header file named by 'header_file'
exists and can be found by the preprocessor; return true if so,
false otherwise.
"""
return self.try_cpp(body="/* No body */", headers=[header],
include_dirs=include_dirs)
def dump_file(filename, head=None):
"""Dumps a file content into log.info.
If head is not None, will be dumped before the file content.
"""
if head is None:
log.info('%s' % filename)
else:
log.info(head)
file = open(filename)
try:
log.info(file.read())
finally:
file.close()
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