mirror of https://github.com/python/cpython
191 lines
5.5 KiB
Python
191 lines
5.5 KiB
Python
"""Extension management for Windows.
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Under Windows it is unlikely the .obj files are of use, as special compiler options
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are needed (primarily to toggle the behavior of "public" symbols.
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I dont consider it worth parsing the MSVC makefiles for compiler options. Even if
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we get it just right, a specific freeze application may have specific compiler
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options anyway (eg, to enable or disable specific functionality)
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So my basic stragtegy is:
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* Have some Windows INI files which "describe" one or more extension modules.
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(Freeze comes with a default one for all known modules - but you can specify
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your own).
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* This description can include:
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- The MSVC .dsp file for the extension. The .c source file names
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are extraced from there.
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- Specific compiler/linker options
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- Flag to indicate if Unicode compilation is expected.
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At the moment the name and location of this INI file is hardcoded,
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but an obvious enhancement would be to provide command line options.
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"""
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import os, string, sys
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try:
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import win32api
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except ImportError:
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win32api = None # User has already been warned
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class CExtension:
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"""An abstraction of an extension implemented in C/C++
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"""
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def __init__(self, name, sourceFiles):
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self.name = name
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# A list of strings defining additional compiler options.
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self.sourceFiles = sourceFiles
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# A list of special compiler options to be applied to
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# all source modules in this extension.
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self.compilerOptions = []
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# A list of .lib files the final .EXE will need.
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self.linkerLibs = []
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def GetSourceFiles(self):
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return self.sourceFiles
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def AddCompilerOption(self, option):
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self.compilerOptions.append(option)
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def GetCompilerOptions(self):
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return self.compilerOptions
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def AddLinkerLib(self, lib):
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self.linkerLibs.append(lib)
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def GetLinkerLibs(self):
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return self.linkerLibs
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def checkextensions(unknown, extra_inis, prefix):
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# Create a table of frozen extensions
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defaultMapName = os.path.join( os.path.split(sys.argv[0])[0], "extensions_win32.ini")
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if not os.path.isfile(defaultMapName):
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sys.stderr.write("WARNING: %s can not be found - standard extensions may not be found" % mapFileName)
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else:
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# must go on end, so other inis can override.
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extra_inis.append(defaultMapName)
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ret = []
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for mod in unknown:
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for ini in extra_inis:
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# print "Looking for", mod, "in", win32api.GetFullPathName(ini),"...",
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defn = get_extension_defn( mod, ini, prefix )
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if defn is not None:
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# print "Yay - found it!"
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ret.append( defn )
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break
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# print "Nope!"
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else: # For not broken!
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sys.stderr.write("No definition of module %s in any specified map file.\n" % (mod))
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return ret
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def get_extension_defn(moduleName, mapFileName, prefix):
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if win32api is None: return None
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os.environ['PYTHONPREFIX'] = prefix
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dsp = win32api.GetProfileVal(moduleName, "dsp", "", mapFileName)
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if dsp=="":
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return None
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# We allow environment variables in the file name
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dsp = win32api.ExpandEnvironmentStrings(dsp)
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# If the path to the .DSP file is not absolute, assume it is relative
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# to the description file.
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if not os.path.isabs(dsp):
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dsp = os.path.join( os.path.split(mapFileName)[0], dsp)
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# Parse it to extract the source files.
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sourceFiles = parse_dsp(dsp)
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if sourceFiles is None:
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return None
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module = CExtension(moduleName, sourceFiles)
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# Put the path to the DSP into the environment so entries can reference it.
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os.environ['dsp_path'] = os.path.split(dsp)[0]
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os.environ['ini_path'] = os.path.split(mapFileName)[0]
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cl_options = win32api.GetProfileVal(moduleName, "cl", "", mapFileName)
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if cl_options:
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module.AddCompilerOption(win32api.ExpandEnvironmentStrings(cl_options))
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exclude = win32api.GetProfileVal(moduleName, "exclude", "", mapFileName)
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exclude = string.split(exclude)
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if win32api.GetProfileVal(moduleName, "Unicode", 0, mapFileName):
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module.AddCompilerOption('/D UNICODE /D _UNICODE')
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libs = string.split(win32api.GetProfileVal(moduleName, "libs", "", mapFileName))
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for lib in libs:
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module.AddLinkerLib(win32api.ExpandEnvironmentStrings(lib))
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for exc in exclude:
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if exc in module.sourceFiles:
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modules.sourceFiles.remove(exc)
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return module
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# Given an MSVC DSP file, locate C source files it uses
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# returns a list of source files.
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def parse_dsp(dsp):
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# print "Processing", dsp
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# For now, only support
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ret = []
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dsp_path, dsp_name = os.path.split(dsp)
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try:
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lines = open(dsp, "r").readlines()
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except IOError, msg:
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sys.stderr.write("%s: %s\n" % (dsp, msg))
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return None
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for line in lines:
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fields = string.split(string.strip(line), "=", 2)
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if fields[0]=="SOURCE":
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if string.lower(os.path.splitext(fields[1])[1]) in ['.cpp', '.c']:
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ret.append( win32api.GetFullPathName(os.path.join(dsp_path, fields[1] ) ) )
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return ret
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def write_extension_table(fname, modules):
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fp = open(fname, "w")
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try:
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fp.write (ext_src_header)
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# Write fn protos
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for module in modules:
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# bit of a hack for .pyd's as part of packages.
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name = string.split(module.name,'.')[-1]
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fp.write('extern void init%s(void);\n' % (name) )
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# Write the table
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fp.write (ext_tab_header)
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for module in modules:
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name = string.split(module.name,'.')[-1]
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fp.write('\t{"%s", init%s},\n' % (name, name) )
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fp.write (ext_tab_footer)
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fp.write(ext_src_footer)
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finally:
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fp.close()
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ext_src_header = """\
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#include "Python.h"
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"""
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ext_tab_header = """\
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static struct _inittab extensions[] = {
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"""
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ext_tab_footer = """\
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/* Sentinel */
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{0, 0}
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};
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"""
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ext_src_footer = """\
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extern DL_IMPORT(int) PyImport_ExtendInittab(struct _inittab *newtab);
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int PyInitFrozenExtensions()
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{
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return PyImport_ExtendInittab(extensions);
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}
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"""
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