|
|
| import sys, os, subprocess
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|
|
| from .error import PkgConfigError
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|
|
|
|
| def merge_flags(cfg1, cfg2):
|
| """Merge values from cffi config flags cfg2 to cf1
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|
|
| Example:
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| merge_flags({"libraries": ["one"]}, {"libraries": ["two"]})
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| {"libraries": ["one", "two"]}
|
| """
|
| for key, value in cfg2.items():
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| if key not in cfg1:
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| cfg1[key] = value
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| else:
|
| if not isinstance(cfg1[key], list):
|
| raise TypeError("cfg1[%r] should be a list of strings" % (key,))
|
| if not isinstance(value, list):
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| raise TypeError("cfg2[%r] should be a list of strings" % (key,))
|
| cfg1[key].extend(value)
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| return cfg1
|
|
|
|
|
| def call(libname, flag, encoding=sys.getfilesystemencoding()):
|
| """Calls pkg-config and returns the output if found
|
| """
|
| a = ["pkg-config", "--print-errors"]
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| a.append(flag)
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| a.append(libname)
|
| try:
|
| pc = subprocess.Popen(a, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
|
| except EnvironmentError as e:
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| raise PkgConfigError("cannot run pkg-config: %s" % (str(e).strip(),))
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|
|
| bout, berr = pc.communicate()
|
| if pc.returncode != 0:
|
| try:
|
| berr = berr.decode(encoding)
|
| except Exception:
|
| pass
|
| raise PkgConfigError(berr.strip())
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|
|
| if sys.version_info >= (3,) and not isinstance(bout, str):
|
| try:
|
| bout = bout.decode(encoding)
|
| except UnicodeDecodeError:
|
| raise PkgConfigError("pkg-config %s %s returned bytes that cannot "
|
| "be decoded with encoding %r:\n%r" %
|
| (flag, libname, encoding, bout))
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|
|
| if os.altsep != '\\' and '\\' in bout:
|
| raise PkgConfigError("pkg-config %s %s returned an unsupported "
|
| "backslash-escaped output:\n%r" %
|
| (flag, libname, bout))
|
| return bout
|
|
|
|
|
| def flags_from_pkgconfig(libs):
|
| r"""Return compiler line flags for FFI.set_source based on pkg-config output
|
|
|
| Usage
|
| ...
|
| ffibuilder.set_source("_foo", pkgconfig = ["libfoo", "libbar >= 1.8.3"])
|
|
|
| If pkg-config is installed on build machine, then arguments include_dirs,
|
| library_dirs, libraries, define_macros, extra_compile_args and
|
| extra_link_args are extended with an output of pkg-config for libfoo and
|
| libbar.
|
|
|
| Raises PkgConfigError in case the pkg-config call fails.
|
| """
|
|
|
| def get_include_dirs(string):
|
| return [x[2:] for x in string.split() if x.startswith("-I")]
|
|
|
| def get_library_dirs(string):
|
| return [x[2:] for x in string.split() if x.startswith("-L")]
|
|
|
| def get_libraries(string):
|
| return [x[2:] for x in string.split() if x.startswith("-l")]
|
|
|
|
|
| def get_macros(string):
|
| def _macro(x):
|
| x = x[2:]
|
| if '=' in x:
|
| return tuple(x.split("=", 1))
|
| else:
|
| return (x, None)
|
| return [_macro(x) for x in string.split() if x.startswith("-D")]
|
|
|
| def get_other_cflags(string):
|
| return [x for x in string.split() if not x.startswith("-I") and
|
| not x.startswith("-D")]
|
|
|
| def get_other_libs(string):
|
| return [x for x in string.split() if not x.startswith("-L") and
|
| not x.startswith("-l")]
|
|
|
|
|
| def kwargs(libname):
|
| fse = sys.getfilesystemencoding()
|
| all_cflags = call(libname, "--cflags")
|
| all_libs = call(libname, "--libs")
|
| return {
|
| "include_dirs": get_include_dirs(all_cflags),
|
| "library_dirs": get_library_dirs(all_libs),
|
| "libraries": get_libraries(all_libs),
|
| "define_macros": get_macros(all_cflags),
|
| "extra_compile_args": get_other_cflags(all_cflags),
|
| "extra_link_args": get_other_libs(all_libs),
|
| }
|
|
|
|
|
| ret = {}
|
| for libname in libs:
|
| lib_flags = kwargs(libname)
|
| merge_flags(ret, lib_flags)
|
| return ret
|
|
|
