Polish Bazel build scripts (#6424)

* Polish Bazel build scripts

* Remove glog references from streaming_logging.cc

* Move out COPTS and reference them

* Disable streaming on Windows

* Remove -fno-gnu-unique

bazel/ray.bzl

@@ -2,6 +2,19 @@ load("@com_github_google_flatbuffers//:build_defs.bzl", "flatbuffer_library_publ
 load("@com_github_checkstyle_java//checkstyle:checkstyle.bzl", "checkstyle_test")
 load("@bazel_common//tools/maven:pom_file.bzl", "pom_file")
 
+# TODO(mehrdadn): (How to) support dynamic linking?
+PROPAGATED_WINDOWS_DEFINES = ["RAY_STATIC"]
+
+COPTS = ["-DRAY_USE_GLOG"] + select({
+    "@bazel_tools//src/conditions:windows": [
+        "-DWIN32_LEAN_AND_MEAN=",  # Block the inclusion of WinSock.h, which is obsolete and causes errors
+        "-Wno-builtin-macro-redefined",  # To get rid of warnings caused by deterministic build macros (e.g. #define __DATE__ "redacted")
+        "-Wno-microsoft-unqualified-friend",  # This shouldn't normally be enabled, but otherwise we get: google/protobuf/map_field.h: warning: unqualified friend declaration referring to type outside of the nearest enclosing namespace is a Microsoft extension; add a nested name specifier (for: friend class DynamicMessage)
+    ] + ["-D" + define for define in PROPAGATED_WINDOWS_DEFINES],
+    "//conditions:default": [
+    ],
+})
+
 def flatbuffer_py_library(name, srcs, outs, out_prefix, includes = [], include_paths = []):
     flatbuffer_library_public(
         name = name,
@@ -64,9 +77,3 @@ def define_java_module(
             "{auto_gen_header}": "<!-- This file is auto-generated by Bazel from pom_template.xml, do not modify it. -->",
         },
     )
-
-def if_linux_x86_64(a):
-    return select({
-        "//:linux_x86_64": a,
-        "//conditions:default": [],
-    })