[Bazel/MSVC] Cleanup -ldl/-lm flags for MSVC

tensorflow/core/BUILD

@@ -2477,13 +2477,11 @@ tf_cuda_library(
     hdrs = FRAMEWORK_INTERNAL_PUBLIC_HEADERS,
     copts = tf_copts(),
     linkopts = select({
-        "//tensorflow:freebsd": [],
+        "//tensorflow:freebsd": ["-lm"],
         "//tensorflow:windows": [],
         "//tensorflow:windows_msvc": [],
-        "//conditions:default": ["-ldl"],
-    }) + [
-        "-lm",
-    ],
+        "//conditions:default": ["-ldl", "-lm"],
+    }),
     deps = [
         ":lib",
         ":lib_internal",

third_party/double_conversion.BUILD

@@ -4,6 +4,11 @@ licenses(["notice"])
 
 exports_files(["LICENSE"])
 
+config_setting(
+    name = "windows",
+    values = {"cpu": "x64_windows"},
+)
+
 cc_library(
     name = "double-conversion",
     srcs = [
@@ -28,11 +33,10 @@ cc_library(
         "double-conversion/ieee.h",
         "double-conversion/strtod.h",
     ],
-    includes = [
-        ".",
-    ],
-    linkopts = [
-        "-lm",
-    ],
+    includes = ["."],
+    linkopts = select({
+        ":windows": [],
+        "//conditions:default": ["-lm"],
+    }),
     visibility = ["//visibility:public"],
 )

third_party/fft2d/fft2d.BUILD

@@ -14,6 +14,11 @@ FFT2D_SRCS = [
     "fft/fftsg.c",
 ]
 
+config_setting(
+    name = "windows",
+    values = {"cpu": "x64_windows"},
+)
+
 # This is the main 2D FFT library.  The 2D FFTs in this library call
 # 1D FFTs.  In addition, fast DCTs are provided for the special case
 # of 8x8 and 16x16.  This code in this library is referred to as
@@ -21,7 +26,10 @@ FFT2D_SRCS = [
 cc_library(
     name = "fft2d",
     srcs = FFT2D_SRCS,
-    linkopts = ["-lm"],
+    linkopts = select({
+        ":windows": [],
+        "//conditions:default": ["-lm"],
+    }),
 )
 
 objc_library(

third_party/flatbuffers/flatbuffers.BUILD

@@ -12,12 +12,15 @@ config_setting(
     visibility = ["//visibility:public"],
 )
 
-FLATBUFFERS_COPTS = [
-    "-fexceptions",
-] + select({
+config_setting(
+    name = "windows",
+    values = {"cpu": "x64_windows"},
+)
+
+FLATBUFFERS_COPTS = select({
     "@bazel_tools//src:windows": [],
     "@bazel_tools//src:windows_msvc": [],
-    "//conditions:default": ["-Wno-implicit-fallthrough"],
+    "//conditions:default": ["-Wno-implicit-fallthrough", "-fexceptions"],
 })
 
 # Public flatc library to compile flatbuffer files at runtime.
@@ -121,6 +124,7 @@ cc_binary(
         ":freebsd": [
             "-lm",
         ],
+        ":windows": [],
         "//conditions:default": [
             "-lm",
             "-ldl",

third_party/snappy.BUILD

@@ -18,17 +18,10 @@ cc_library(
         "snappy-stubs-public.h",
     ],
     hdrs = ["snappy.h"],
-    copts = select({
-        "@org_tensorflow//tensorflow:windows": [
-            "/DHAVE_CONFIG_H",
-            "/EHsc",
-        ],
-        "@org_tensorflow//tensorflow:windows_msvc": [
-            "/DHAVE_CONFIG_H",
-            "/EHsc",
-        ],
+    copts = ["-DHAVE_CONFIG_H"] + select({
+        "@org_tensorflow//tensorflow:windows": [],
+        "@org_tensorflow//tensorflow:windows_msvc": [],
         "//conditions:default": [
-            "-DHAVE_CONFIG_H",
             "-fno-exceptions",
             "-Wno-sign-compare",
             "-Wno-shift-negative-value",