213 lines
7.3 KiB
Python
213 lines
7.3 KiB
Python
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"""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 SCons.Tool.linkCommon import StringizeLibSymlinks, EmitLibSymlinks
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from SCons.Util import CLVar, is_String
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from . import gnulink
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def cyglink_lib_emitter(target, source, env, **kw):
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verbose = True
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if 'variable_prefix' in kw:
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var_prefix = kw['variable_prefix']
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else:
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var_prefix = 'SHLIB'
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no_import_lib = env.get('no_import_lib', False)
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if verbose:
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print("cyglink_lib_emitter: target[0]={!r}".format(target[0].get_path()))
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if not no_import_lib:
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# Specify import lib and add to targets
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import_lib = env.subst('$%s_IMPLIBNAME' % var_prefix, target=target, source=source)
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import_lib_target = env.fs.File(import_lib)
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import_lib_target.attributes.shared = 1
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target.append(import_lib_target)
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if verbose:
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print("cyglink_lib_emitter: import_lib={}".format(import_lib))
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print("cyglink_lib_emitter: target=%s" % target)
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for tgt in target:
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if is_String(tgt):
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tgt = env.File(tgt)
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tgt.attributes.shared = 1
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return target, source
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def cyglink_ldmodule_emitter(target, source, env, **kw):
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return cyglink_lib_emitter(target, source, env, variable_prefix='LDMODULE')
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def cyglink_shlib_symlink_emitter(target, source, env, **kw):
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"""
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On cygwin, we only create a symlink from the non-versioned implib to the versioned implib.
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We don't version the shared library itself.
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:param target:
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:param source:
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:param env:
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:param kw:
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:return:
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"""
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verbose = True
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if 'variable_prefix' in kw:
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var_prefix = kw['variable_prefix']
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else:
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var_prefix = 'SHLIB'
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no_import_lib = env.get('no_import_lib', False)
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if no_import_lib in ['1', 'True', 'true', True]:
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if verbose:
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print("cyglink_shlib_symlink_emitter: no_import_lib=%s" % no_import_lib)
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return target, source
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no_symlinks = env.subst('$%sNOVERSIONSYMLINKS' % var_prefix)
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if no_symlinks in ['1', 'True', 'true', True]:
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return target, source
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shlibversion = env.subst('$%sVERSION' % var_prefix)
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if shlibversion:
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if verbose:
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print("cyglink_shlib_symlink_emitter: %sVERSION=%s" % (var_prefix, shlibversion))
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# The implib (added by the cyglink_lib_emitter)
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imp_lib_node = target[1]
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shlib_noversion_symlink = env.subst('$%s_NOVERSION_SYMLINK' % var_prefix, target=target[0], source=source)
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if verbose:
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print("cyglink_shlib_symlink_emitter: shlib_noversion_symlink :%s" % shlib_noversion_symlink)
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print("cyglink_shlib_symlink_emitter: imp_lib_node :%s" % imp_lib_node)
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symlinks = [(env.File(shlib_noversion_symlink), imp_lib_node)]
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if verbose:
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print("cyglink_shlib_symlink_emitter: symlinks={!r}".format(
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', '.join(["%r->%r" % (k, v) for k, v in StringizeLibSymlinks(symlinks)])
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))
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if symlinks:
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# This does the actual symlinking
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EmitLibSymlinks(env, symlinks, target[0])
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# This saves the information so if the versioned shared library is installed
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# it can faithfully reproduce the correct symlinks
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target[0].attributes.shliblinks = symlinks
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return target, source
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def cyglink_ldmod_symlink_emitter(target, source, env, **kw):
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return cyglink_shlib_symlink_emitter(target, source, env, variable_prefix='LDMODULE')
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def cyglink_shlibversion(target, source, env, for_signature):
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var_prefix = 'SHLIB'
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var = '%sVERSION' % var_prefix
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if var not in env:
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return ''
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version = env.subst("$%s" % var, target=target, source=source)
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version = version.replace('.', '-')
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return "." + version
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def cyglink_ldmodule_version(target, source, env, for_signature):
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var_prefix = 'LDMODULE'
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var = '%sVERSION' % var_prefix
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if var not in env:
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return ''
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version = env.subst("$%s" % var, target=target, source=source)
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version = version.replace('.', '-')
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return "." + version
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def _implib_pre_flags(target, source, env, for_signature):
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no_import_lib = env.get('no_import_lib', False)
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if no_import_lib in ['1', 'True', 'true', True]:
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return ''
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else:
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return '-Wl,--out-implib=${TARGETS[1]} -Wl,--export-all-symbols -Wl,--enable-auto-import -Wl,--whole-archive'
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def _implib_post_flags(target, source, env, for_signature):
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no_import_lib = env.get('no_import_lib', False)
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if no_import_lib in ['1', 'True', 'true', True]:
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return ''
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else:
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return '-Wl,--no-whole-archive'
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def generate(env):
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"""Add Builders and construction variables for cyglink to an Environment."""
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gnulink.generate(env)
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env['LINKFLAGS'] = CLVar('-Wl,-no-undefined')
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env['SHLIBPREFIX'] = 'cyg'
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env['SHLIBSUFFIX'] = '.dll'
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env['IMPLIBPREFIX'] = 'lib'
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env['IMPLIBSUFFIX'] = '.dll.a'
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# Variables used by versioned shared libraries
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# SHLIBVERSIONFLAGS and LDMODULEVERSIONFLAGS are same as in gnulink...
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env['_SHLIBVERSIONFLAGS'] = '$SHLIBVERSIONFLAGS'
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env['_LDMODULEVERSIONFLAGS'] = '$LDMODULEVERSIONFLAGS'
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env['_IMPLIB_PRE_SOURCES'] = _implib_pre_flags
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env['_IMPLIB_POST_SOURCES'] = _implib_post_flags
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env['SHLINKCOM'] = '$SHLINK -o $TARGET $SHLINKFLAGS $__SHLIBVERSIONFLAGS $__RPATH ' \
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'$_IMPLIB_PRE_SOURCES $SOURCES $_IMPLIB_POST_SOURCES $_LIBDIRFLAGS $_LIBFLAGS'
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env['LDMODULECOM'] = '$LDMODULE -o $TARGET $SHLINKFLAGS $__LDMODULEVERSIONFLAGS $__RPATH ' \
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'$_IMPLIB_PRE_SOURCES $SOURCES $_IMPLIB_POST_SOURCES $_LIBDIRFLAGS $_LIBFLAGS'
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# Overwrite emitters. Cyglink does things differently when creating symlinks
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env['SHLIBEMITTER'] = [cyglink_lib_emitter, cyglink_shlib_symlink_emitter]
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env['LDMODULEEMITTER'] = [cyglink_ldmodule_emitter, cyglink_ldmod_symlink_emitter]
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# This is the non versioned shlib filename
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# If SHLIBVERSION is defined then this will symlink to $SHLIBNAME
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env['SHLIB_NOVERSION_SYMLINK'] = '${IMPLIBPREFIX}$_get_shlib_stem${IMPLIBSUFFIX}'
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env['LDMODULE_NOVERSION_SYMLINK'] = '${IMPLIBPREFIX}$_get_ldmodule_stem${IMPLIBSUFFIX}'
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env['SHLIB_IMPLIBNAME'] = '${IMPLIBPREFIX}$_get_shlib_stem${_SHLIB_IMPLIBSUFFIX}'
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env['LDMODULE_IMPLIBNAME'] = '${IMPLIBPREFIX}$_get_ldmodule_stem${_LDMODULE_IMPLIBSUFFIX}'
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env['_cyglink_shlibversion'] = cyglink_shlibversion
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env['_SHLIB_IMPLIBSUFFIX'] = '${_cyglink_shlibversion}${IMPLIBSUFFIX}'
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env['_SHLIBSUFFIX'] = '${_cyglink_shlibversion}${SHLIBSUFFIX}'
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env['_cyglink_ldmodule_version'] = cyglink_ldmodule_version
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env['_LDMODULESUFFIX'] = '${_cyglink_ldmodule_version}${LDMODULESUFFIX}'
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env['_LDMODULE_IMPLIBSUFFIX'] = '${_cyglink_ldmodule_version}${IMPLIBSUFFIX}'
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# Remove variables set by default initialization which aren't needed/used by cyglink
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# these variables were set by gnulink but are not used in cyglink
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for rv in ['_SHLIBSONAME', '_LDMODULESONAME']:
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if rv in env:
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del env[rv]
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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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