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314 lines
13 KiB
Python
314 lines
13 KiB
Python
"""distutils.ccompiler
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Contains CCompiler, an abstract base class that defines the interface
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for the Distutils compiler abstraction model."""
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# created 1999/07/05, Greg Ward
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__rcsid__ = "$Id$"
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import os
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from types import *
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from copy import copy
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from distutils.errors import *
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class CCompiler:
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"""Abstract base class to define the interface that must be implemented
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by real compiler abstraction classes. Might have some use as a
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place for shared code, but it's not yet clear what code can be
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shared between compiler abstraction models for different platforms.
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The basic idea behind a compiler abstraction class is that each
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instance can be used for all the compile/link steps in building
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a single project. Thus, attributes common to all of those compile
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and link steps -- include directories, macros to define, libraries
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to link against, etc. -- are attributes of the compiler instance.
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To allow for variability in how individual files are treated,
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most (all?) of those attributes may be varied on a per-compilation
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or per-link basis."""
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# XXX things not handled by this compiler abstraction model:
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# * client can't provide additional options for a compiler,
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# e.g. warning, optimization, debugging flags. Perhaps this
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# should be the domain of concrete compiler abstraction classes
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# (UnixCCompiler, MSVCCompiler, etc.) -- or perhaps the base
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# class should have methods for the common ones.
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# * can't put output files (object files, libraries, whatever)
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# into a separate directory from their inputs. Should this be
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# handled by an 'output_dir' attribute of the whole object, or a
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# parameter to the compile/link_* methods, or both?
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# * can't completely override the include or library searchg
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# path, ie. no "cc -I -Idir1 -Idir2" or "cc -L -Ldir1 -Ldir2".
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# I'm not sure how widely supported this is even by POSIX
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# compilers, much less on other platforms. And I'm even less
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# sure how useful it is; probably for cross-compiling, but I
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# have no intention of supporting that.
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# * can't do really freaky things with the library list/library
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# dirs, e.g. "-Ldir1 -lfoo -Ldir2 -lfoo" to link against
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# different versions of libfoo.a in different locations. I
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# think this is useless without the ability to null out the
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# library search path anyways.
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# * don't deal with verbose and dry-run flags -- probably a
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# CCompiler object should just drag them around the way the
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# Distribution object does (either that or we have to drag
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# around a Distribution object, which is what Command objects
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# do... but might be kind of annoying)
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def __init__ (self):
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# 'macros': a list of macro definitions (or undefinitions). A
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# macro definition is a 2-tuple (name, value), where the value is
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# either a string or None (no explicit value). A macro
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# undefinition is a 1-tuple (name,).
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self.macros = []
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# 'include_dirs': a list of directories to search for include files
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self.include_dirs = []
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# 'libraries': a list of libraries to include in any link
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# (library names, not filenames: eg. "foo" not "libfoo.a")
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self.libraries = []
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# 'library_dirs': a list of directories to search for libraries
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self.library_dirs = []
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# 'objects': a list of object files (or similar, such as explicitly
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# named library files) to include on any link
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self.objects = []
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# __init__ ()
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def _find_macro (self, name):
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i = 0
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for defn in self.macros:
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if defn[0] == name:
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return i
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i = i + 1
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return None
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def _check_macro_definitions (self, definitions):
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"""Ensures that every element of 'definitions' is a valid macro
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definition, ie. either (name,value) 2-tuple or a (name,)
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tuple. Do nothing if all definitions are OK, raise
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TypeError otherwise."""
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for defn in definitions:
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if not (type (defn) is TupleType and
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(len (defn) == 1 or
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(len (defn) == 2 and
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(type (defn[1]) is StringType or defn[1] is None))) and
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type (defn[0]) is StringType):
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raise TypeError, \
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("invalid macro definition '%s': " % defn) + \
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"must be tuple (string,), (string, string), or " + \
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"(string, None)"
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# -- Bookkeeping methods -------------------------------------------
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def define_macro (self, name, value=None):
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"""Define a preprocessor macro for all compilations driven by
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this compiler object. The optional parameter 'value' should be
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a string; if it is not supplied, then the macro will be defined
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without an explicit value and the exact outcome depends on the
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compiler used (XXX true? does ANSI say anything about this?)"""
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# Delete from the list of macro definitions/undefinitions if
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# already there (so that this one will take precedence).
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i = self._find_macro (name)
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if i is not None:
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del self.macros[i]
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defn = (name, value)
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self.macros.append (defn)
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def undefine_macro (self, name):
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"""Undefine a preprocessor macro for all compilations driven by
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this compiler object. If the same macro is defined by
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'define_macro()' and undefined by 'undefine_macro()' the last
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call takes precedence (including multiple redefinitions or
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undefinitions). If the macro is redefined/undefined on a
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per-compilation basis (ie. in the call to 'compile()'), then
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that takes precedence."""
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# Delete from the list of macro definitions/undefinitions if
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# already there (so that this one will take precedence).
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i = self._find_macro (name)
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if i is not None:
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del self.macros[i]
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undefn = (name,)
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self.macros.append (undefn)
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def add_include_dir (self, dir):
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"""Add 'dir' to the list of directories that will be searched
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for header files. The compiler is instructed to search
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directories in the order in which they are supplied by
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successive calls to 'add_include_dir()'."""
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self.include_dirs.append (dir)
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def set_include_dirs (self, dirs):
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"""Set the list of directories that will be searched to 'dirs'
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(a list of strings). Overrides any preceding calls to
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'add_include_dir()'; subsequence calls to 'add_include_dir()'
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add to the list passed to 'set_include_dirs()'. This does
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not affect any list of standard include directories that
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the compiler may search by default."""
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self.include_dirs = copy (dirs)
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def add_library (self, libname):
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"""Add 'libname' to the list of libraries that will be included
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in all links driven by this compiler object. Note that
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'libname' should *not* be the name of a file containing a
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library, but the name of the library itself: the actual filename
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will be inferred by the linker, the compiler, or the compiler
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abstraction class (depending on the platform).
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The linker will be instructed to link against libraries in the
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order they were supplied to 'add_library()' and/or
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'set_libraries()'. It is perfectly valid to duplicate library
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names; the linker will be instructed to link against libraries
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as many times as they are mentioned."""
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self.libraries.append (libname)
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def set_libraries (self, libnames):
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"""Set the list of libraries to be included in all links driven
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by this compiler object to 'libnames' (a list of strings).
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This does not affect any standard system libraries that the
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linker may include by default."""
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self.libraries = copy (libnames)
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def add_library_dir (self, dir):
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"""Add 'dir' to the list of directories that will be searched for
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libraries specified to 'add_library()' and 'set_libraries()'.
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The linker will be instructed to search for libraries in the
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order they are supplied to 'add_library_dir()' and/or
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'set_library_dirs()'."""
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self.library_dirs.append (dir)
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def set_library_dirs (self, dirs):
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"""Set the list of library search directories to 'dirs' (a list
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of strings). This does not affect any standard library
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search path that the linker may search by default."""
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self.library_dirs = copy (dirs)
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def add_link_object (self, object):
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"""Add 'object' to the list of object files (or analogues, such
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as explictly named library files or the output of "resource
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compilers") to be included in every link driven by this
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compiler object."""
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self.objects.append (object)
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def set_link_objects (self, objects):
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"""Set the list of object files (or analogues) to be included
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in every link to 'objects'. This does not affect any
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standard object files that the linker may include by default
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(such as system libraries)."""
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self.objects = copy (objects)
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# -- Worker methods ------------------------------------------------
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# (must be implemented by subclasses)
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def compile (self,
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sources,
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macros=None,
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includes=None):
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"""Compile one or more C/C++ source files. 'sources' must be
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a list of strings, each one the name of a C/C++ source
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file. Return a list of the object filenames generated
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(one for each source filename in 'sources').
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'macros', if given, must be a list of macro definitions. A
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macro definition is either a (name, value) 2-tuple or a (name,)
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1-tuple. The former defines a macro; if the value is None, the
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macro is defined without an explicit value. The 1-tuple case
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undefines a macro. Later definitions/redefinitions/
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undefinitions take precedence.
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'includes', if given, must be a list of strings, the directories
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to add to the default include file search path for this
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compilation only."""
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pass
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# XXX this is kind of useless without 'link_binary()' or
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# 'link_executable()' or something -- or maybe 'link_static_lib()'
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# should not exist at all, and we just have 'link_binary()'?
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def link_static_lib (self,
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objects,
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output_libname,
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libraries=None,
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library_dirs=None):
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"""Link a bunch of stuff together to create a static library
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file. The "bunch of stuff" consists of the list of object
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files supplied as 'objects', the extra object files supplied
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to 'add_link_object()' and/or 'set_link_objects()', the
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libraries supplied to 'add_library()' and/or
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'set_libraries()', and the libraries supplied as 'libraries'
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(if any).
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'output_libname' should be a library name, not a filename;
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the filename will be inferred from the library name.
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'library_dirs', if supplied, should be a list of additional
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directories to search on top of the system default and those
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supplied to 'add_library_dir()' and/or 'set_library_dirs()'."""
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pass
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# XXX what's better/more consistent/more universally understood
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# terminology: "shared library" or "dynamic library"?
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def link_shared_lib (self,
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objects,
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output_libname,
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libraries=None,
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library_dirs=None):
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"""Link a bunch of stuff together to create a shared library
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file. Has the same effect as 'link_static_lib()' except
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that the filename inferred from 'output_libname' will most
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likely be different, and the type of file generated will
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almost certainly be different."""
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pass
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def link_shared_object (self,
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objects,
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output_filename,
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libraries=None,
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library_dirs=None):
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"""Link a bunch of stuff together to create a shared object
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file. Much like 'link_shared_lib()', except the output
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filename is explicitly supplied as 'output_filename'."""
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pass
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# class CCompiler
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def new_compiler (plat=None):
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"""Generate a CCompiler instance for platform 'plat' (or the
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current platform, if 'plat' not supplied). Really instantiates
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some concrete subclass of CCompiler, of course."""
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if plat is None: plat = os.name
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if plat == 'posix':
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from unixccompiler import UnixCCompiler
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return UnixCCompiler ()
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else:
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raise DistutilsPlatformError, \
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"don't know how to compile C/C++ code on platform %s" % plat
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