236 lines
8.3 KiB
Python
236 lines
8.3 KiB
Python
"""SCons.Tool.cyglink
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Customization of gnulink for Cygwin (http://www.cygwin.com/)
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There normally shouldn't be any need to import this module directly.
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It will usually be imported through the generic SCons.Tool.Tool()
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selection method.
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"""
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from __future__ import absolute_import, print_function
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import re
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import os
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import SCons.Action
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import SCons.Util
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import SCons.Tool
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#MAYBE: from . import gnulink
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from . import gnulink
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from . import link
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def _lib_generator(target, source, env, for_signature, **kw):
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try: cmd = kw['cmd']
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except KeyError: cmd = SCons.Util.CLVar(['$SHLINK'])
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try: vp = kw['varprefix']
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except KeyError: vp = 'SHLIB'
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dll = env.FindIxes(target, '%sPREFIX' % vp, '%sSUFFIX' % vp)
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if dll: cmd.extend(['-o', dll])
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cmd.extend(['$SHLINKFLAGS', '$__%sVERSIONFLAGS' % vp, '$__RPATH'])
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implib = env.FindIxes(target, 'IMPLIBPREFIX', 'IMPLIBSUFFIX')
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if implib:
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cmd.extend([
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'-Wl,--out-implib='+implib.get_string(for_signature),
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'-Wl,--export-all-symbols',
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'-Wl,--enable-auto-import',
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'-Wl,--whole-archive', '$SOURCES',
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'-Wl,--no-whole-archive', '$_LIBDIRFLAGS', '$_LIBFLAGS'
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])
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else:
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cmd.extend(['$SOURCES', '$_LIBDIRFLAGS', '$_LIBFLAGS'])
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return [cmd]
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def shlib_generator(target, source, env, for_signature):
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return _lib_generator(target, source, env, for_signature,
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varprefix='SHLIB',
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cmd = SCons.Util.CLVar(['$SHLINK']))
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def ldmod_generator(target, source, env, for_signature):
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return _lib_generator(target, source, env, for_signature,
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varprefix='LDMODULE',
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cmd = SCons.Util.CLVar(['$LDMODULE']))
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def _lib_emitter(target, source, env, **kw):
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Verbose = False
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if Verbose:
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print("_lib_emitter: target[0]=%r" % target[0].get_path())
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try: vp = kw['varprefix']
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except KeyError: vp = 'SHLIB'
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try: libtype = kw['libtype']
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except KeyError: libtype = 'ShLib'
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dll = env.FindIxes(target, '%sPREFIX' % vp, '%sSUFFIX' % vp)
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no_import_lib = env.get('no_import_lib', 0)
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if Verbose:
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print("_lib_emitter: dll=%r" % dll.get_path())
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if not dll or len(target) > 1:
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raise SCons.Errors.UserError("A shared library should have exactly one target with the suffix: %s" % env.subst("$%sSUFFIX" % vp))
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# Remove any "lib" after the prefix
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pre = env.subst('$%sPREFIX' % vp)
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if dll.name[len(pre):len(pre)+3] == 'lib':
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dll.name = pre + dll.name[len(pre)+3:]
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if Verbose:
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print("_lib_emitter: dll.name=%r" % dll.name)
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orig_target = target
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target = [env.fs.File(dll)]
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target[0].attributes.shared = 1
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if Verbose:
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print("_lib_emitter: after target=[env.fs.File(dll)]: target[0]=%r" % target[0].get_path())
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# Append an import lib target
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if not no_import_lib:
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# Create list of target libraries as strings
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target_strings = env.ReplaceIxes(orig_target[0],
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'%sPREFIX' % vp, '%sSUFFIX' % vp,
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'IMPLIBPREFIX', 'IMPLIBSUFFIX')
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if Verbose:
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print("_lib_emitter: target_strings=%r" % target_strings)
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implib_target = env.fs.File(target_strings)
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if Verbose:
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print("_lib_emitter: implib_target=%r" % implib_target.get_path())
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implib_target.attributes.shared = 1
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target.append(implib_target)
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symlinks = SCons.Tool.ImpLibSymlinkGenerator(env, implib_target,
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implib_libtype=libtype,
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generator_libtype=libtype+'ImpLib')
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if Verbose:
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print("_lib_emitter: implib symlinks=%r" % SCons.Tool.StringizeLibSymlinks(symlinks))
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if symlinks:
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SCons.Tool.EmitLibSymlinks(env, symlinks, implib_target, clean_targets = target[0])
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implib_target.attributes.shliblinks = symlinks
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return (target, source)
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def shlib_emitter(target, source, env):
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return _lib_emitter(target, source, env, varprefix='SHLIB', libtype='ShLib')
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def ldmod_emitter(target, source, env):
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return _lib_emitter(target, source, env, varprefix='LDMODULE', libtype='LdMod')
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def _versioned_lib_suffix(env, suffix, version):
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"""Generate versioned shared library suffix from a unversioned one.
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If suffix='.dll', and version='0.1.2', then it returns '-0-1-2.dll'"""
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Verbose = False
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if Verbose:
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print("_versioned_lib_suffix: suffix= ", suffix)
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print("_versioned_lib_suffix: version= ", version)
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cygversion = re.sub('\.', '-', version)
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if not suffix.startswith('-' + cygversion):
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suffix = '-' + cygversion + suffix
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if Verbose:
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print("_versioned_lib_suffix: return suffix= ", suffix)
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return suffix
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def _versioned_implib_name(env, libnode, version, prefix, suffix, **kw):
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return link._versioned_lib_name(env, libnode, version, prefix, suffix,
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SCons.Tool.ImpLibPrefixGenerator,
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SCons.Tool.ImpLibSuffixGenerator,
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implib_libtype=kw['libtype'])
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def _versioned_implib_symlinks(env, libnode, version, prefix, suffix, **kw):
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"""Generate link names that should be created for a versioned shared library.
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Returns a list in the form [ (link, linktarget), ... ]
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"""
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Verbose = False
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if Verbose:
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print("_versioned_implib_symlinks: libnode=%r" % libnode.get_path())
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print("_versioned_implib_symlinks: version=%r" % version)
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try: libtype = kw['libtype']
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except KeyError: libtype = 'ShLib'
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linkdir = os.path.dirname(libnode.get_path())
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if Verbose:
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print("_versioned_implib_symlinks: linkdir=%r" % linkdir)
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name = SCons.Tool.ImpLibNameGenerator(env, libnode,
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implib_libtype=libtype,
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generator_libtype=libtype+'ImpLib')
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if Verbose:
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print("_versioned_implib_symlinks: name=%r" % name)
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major = version.split('.')[0]
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link0 = env.fs.File(os.path.join(linkdir, name))
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symlinks = [(link0, libnode)]
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if Verbose:
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print("_versioned_implib_symlinks: return symlinks=%r" % SCons.Tool.StringizeLibSymlinks(symlinks))
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return symlinks
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shlib_action = SCons.Action.Action(shlib_generator, generator=1)
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ldmod_action = SCons.Action.Action(ldmod_generator, generator=1)
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def generate(env):
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"""Add Builders and construction variables for cyglink to an Environment."""
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gnulink.generate(env)
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env['LINKFLAGS'] = SCons.Util.CLVar('-Wl,-no-undefined')
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env['SHLINKCOM'] = shlib_action
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env['LDMODULECOM'] = ldmod_action
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env.Append(SHLIBEMITTER = [shlib_emitter])
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env.Append(LDMODULEEMITTER = [ldmod_emitter])
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env['SHLIBPREFIX'] = 'cyg'
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env['SHLIBSUFFIX'] = '.dll'
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env['IMPLIBPREFIX'] = 'lib'
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env['IMPLIBSUFFIX'] = '.dll.a'
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# Variables used by versioned shared libraries
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env['_SHLIBVERSIONFLAGS'] = '$SHLIBVERSIONFLAGS'
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env['_LDMODULEVERSIONFLAGS'] = '$LDMODULEVERSIONFLAGS'
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# SHLIBVERSIONFLAGS and LDMODULEVERSIONFLAGS are same as in gnulink...
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# LINKCALLBACKS are NOT inherited from gnulink
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env['LINKCALLBACKS'] = {
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'VersionedShLibSuffix' : _versioned_lib_suffix,
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'VersionedLdModSuffix' : _versioned_lib_suffix,
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'VersionedImpLibSuffix' : _versioned_lib_suffix,
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'VersionedShLibName' : link._versioned_shlib_name,
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'VersionedLdModName' : link._versioned_ldmod_name,
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'VersionedShLibImpLibName' : lambda *args: _versioned_implib_name(*args, libtype='ShLib'),
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'VersionedLdModImpLibName' : lambda *args: _versioned_implib_name(*args, libtype='LdMod'),
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'VersionedShLibImpLibSymlinks' : lambda *args: _versioned_implib_symlinks(*args, libtype='ShLib'),
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'VersionedLdModImpLibSymlinks' : lambda *args: _versioned_implib_symlinks(*args, libtype='LdMod'),
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}
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# these variables were set by gnulink but are not used in cyglink
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try: del env['_SHLIBSONAME']
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except KeyError: pass
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try: del env['_LDMODULESONAME']
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except KeyError: pass
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def exists(env):
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return gnulink.exists(env)
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# Local Variables:
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# tab-width:4
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# indent-tabs-mode:nil
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# End:
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# vim: set expandtab tabstop=4 shiftwidth=4:
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