Fix Bazel build and make it work on Windows.

Change-Id: Ie40ce2f7c828e9f639a996e56a4d3a014c05d701
Reviewed-on: https://boringssl-review.googlesource.com/18544
Reviewed-by: Yun Peng <pcloudy@google.com>
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Yun Peng <pcloudy@google.com>

util/BUILD.toplevel

diff --git a/util/BUILD.toplevel b/util/BUILD.toplevel
index 68a17a6..af7bd30 100644
--- a/util/BUILD.toplevel
+++ b/util/BUILD.toplevel
@@ -26,8 +26,7 @@
     "fips_fragments",
     "ssl_headers",
     "ssl_internal_headers",
-    "ssl_c_sources",
-    "ssl_cc_sources",
+    "ssl_sources",
     "tool_sources",
     "tool_headers",
 )
@@ -42,7 +41,12 @@
     values = {"cpu": "darwin"},
 )
 
-boringssl_copts = [
+config_setting(
+    name = "windows_x86_64",
+    values = {"cpu": "x64_windows"},
+)
+
+posix_copts = [
     # Assembler option --noexecstack adds .note.GNU-stack to each object to
     # ensure that binaries can be built with non-executable stack.
     "-Wa,--noexecstack",
@@ -64,9 +68,15 @@
     # operations for reference counting rather than locks. However, it's
     # known not to work on some Android builds.
     # "-DOPENSSL_C11_ATOMIC",
-] + select({
-    ":linux_x86_64": [],
-    ":mac_x86_64": [],
+]
+
+boringssl_copts = select({
+    ":linux_x86_64": posix_copts,
+    ":mac_x86_64": posix_copts,
+    ":windows_x86_64": [
+        "-DWIN32_LEAN_AND_MEAN",
+        "-DOPENSSL_NO_ASM",
+    ],
     "//conditions:default": ["-DOPENSSL_NO_ASM"],
 })
 
@@ -77,19 +87,31 @@
 })
 
 # For C targets only (not C++), compile with C11 support.
-boringssl_copts_c11 = boringssl_copts + [
+posix_copts_c11 = [
     "-std=c11",
     "-Wmissing-prototypes",
     "-Wold-style-definition",
     "-Wstrict-prototypes",
 ]
 
-# For C targets only (not C++), compile with C11 support.
-boringssl_copts_cxx = boringssl_copts + [
+boringssl_copts_c11 = boringssl_copts + select({
+    ":linux_x86_64": posix_copts_c11,
+    ":mac_x86_64": posix_copts_c11,
+    "//conditions:default": [],
+})
+
+# For C++ targets only (not C), compile with C++11 support.
+posix_copts_cxx = [
     "-std=c++11",
     "-Wmissing-declarations",
 ]
 
+boringssl_copts_cxx = boringssl_copts + select({
+    ":linux_x86_64": posix_copts_cxx,
+    ":mac_x86_64": posix_copts_cxx,
+    "//conditions:default": [],
+})
+
 cc_library(
     name = "crypto",
     srcs = crypto_sources + crypto_internal_headers + crypto_sources_asm,
@@ -105,21 +127,14 @@
 
 cc_library(
     name = "ssl",
-    srcs = ssl_c_sources + ssl_internal_headers,
+    srcs = ssl_sources + ssl_internal_headers,
     hdrs = ssl_headers,
-    copts = boringssl_copts_c11,
+    copts = boringssl_copts_cxx,
     includes = ["src/include"],
     visibility = ["//visibility:public"],
-    deps = [":crypto", ":ssl_cc"],
-)
-
-cc_library(
-    name = "ssl_cc",
-    srcs = ssl_cc_sources + ssl_internal_headers,
-    hdrs = ssl_headers,
-    copts = boringssl_copts,
-    includes = ["src/include"],
-    deps = [":crypto"],
+    deps = [
+        ":crypto",
+    ],
 )
 
 cc_binary(