Added recipe for winsock2 and target_os to dependency conditions.

SConscript

@@ -126,7 +126,8 @@ def _deps_from_json(env: Environment, deps: dict) -> dict:
     for key, dep in deps.items():
         if 'condition' in dep:
             if not _safe_eval(dep['condition'], {
-                'compiler_family': env['COMPILER_FAMILY']
+                'compiler_family': env['COMPILER_FAMILY'],
+                'target_os': os.name
             }):
                 to_remove.append(key)
                 continue
@@ -340,7 +341,7 @@ def _build_target(target: _Target):
         for lib in libs_copy:
             if isinstance(lib, str) and os.path.isabs(lib):
                 target.kwargs['LIBS'].remove(lib)
-                target.kwargs['source'].append(lib)
+                target.kwargs['source'].append(env.Entry(lib))
             elif isinstance(lib, _Target):
                 if not lib.target:
                     _build_target(lib)
@@ -404,6 +405,9 @@ if not config.get('PREPROCESSOR_PREFIX'):
 if 'COMPILATIONDB_FILTER_FILES' not in config:
     config['COMPILATIONDB_FILTER_FILES'] = True
 
+if 'WINDOWS_DISABLE_DEFAULT_DEFINES' not in config:
+    config['WINDOWS_DISABLE_DEFAULT_DEFINES'] = False
+
 AddOption(
     '--build_type',
     dest = 'build_type',
@@ -687,6 +691,11 @@ if env['COMPILER_FAMILY'] == 'gcc':
 elif env['COMPILER_FAMILY'] == 'clang':
     env.Append(CCFLAGS = ['-Wno-deprecated-volatile', '-Wno-nested-anon-types', '-Wno-unknown-warning-option'])
 
+# platform specific options
+if os.name == 'nt':
+    if not config['WINDOWS_DISABLE_DEFAULT_DEFINES']:
+        env.Append(CDEFINES = ['WIN32_LEAN_AND_MEAN', 'NOMINMAX', 'STRICT', 'UNICODE'], CPPDEFINES = ['WIN32_LEAN_AND_MEAN', 'NOMINMAX', 'STRICT', 'UNICODE'])
+
 env.AddMethod(_cook, 'Cook')
 env.AddMethod(_parse_lib_conf, 'ParseLibConf')
 env.AddMethod(_rglob, 'RGlob')