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