1 files changed, 236 insertions, 0 deletions
diff --git a/3rdParty/SCons/scons-3.0.1/engine/SCons/Tool/cyglink.py b/3rdParty/SCons/scons-3.0.1/engine/SCons/Tool/cyglink.py
new file mode 100644
index 0000000..f69b886
--- /dev/null
+++ b/3rdParty/SCons/scons-3.0.1/engine/SCons/Tool/cyglink.py
@@ -0,0 +1,236 @@
+"""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('\.', '-', 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: