Disable pthread for standalone wasm build support (#721)

* Disable pthread for wasm build support

* wasm -> wasm32

absl/BUILD.bazel

@@ -58,3 +58,8 @@ config_setting(
     },
     },
     visibility = [":__subpackages__"],
     visibility = [":__subpackages__"],
 )
 )
+
+config_setting(
+    name = "wasm",
+    values = {"cpu": "wasm32"},
+)

absl/base/BUILD.bazel

@@ -161,6 +161,7 @@ cc_library(
     copts = ABSL_DEFAULT_COPTS,
     copts = ABSL_DEFAULT_COPTS,
     linkopts = select({
     linkopts = select({
         "//absl:windows": [],
         "//absl:windows": [],
+        "//absl:wasm": [],
         "//conditions:default": ["-pthread"],
         "//conditions:default": ["-pthread"],
     }) + ABSL_DEFAULT_LINKOPTS,
     }) + ABSL_DEFAULT_LINKOPTS,
     visibility = [
     visibility = [
@@ -222,6 +223,7 @@ cc_library(
         "//absl:windows": [
         "//absl:windows": [
             "-DEFAULTLIB:advapi32.lib",
             "-DEFAULTLIB:advapi32.lib",
         ],
         ],
+        "//absl:wasm": [],
         "//conditions:default": ["-pthread"],
         "//conditions:default": ["-pthread"],
     }) + ABSL_DEFAULT_LINKOPTS,
     }) + ABSL_DEFAULT_LINKOPTS,
     deps = [
     deps = [

absl/debugging/BUILD.bazel

@@ -148,6 +148,7 @@ cc_test(
     copts = ABSL_TEST_COPTS,
     copts = ABSL_TEST_COPTS,
     linkopts = select({
     linkopts = select({
         "//absl:windows": [],
         "//absl:windows": [],
+        "//absl:wasm": [],
         "//conditions:default": ["-pthread"],
         "//conditions:default": ["-pthread"],
     }) + ABSL_DEFAULT_LINKOPTS,
     }) + ABSL_DEFAULT_LINKOPTS,
     deps = [
     deps = [

absl/random/internal/BUILD.bazel

@@ -99,6 +99,7 @@ cc_library(
     copts = ABSL_DEFAULT_COPTS,
     copts = ABSL_DEFAULT_COPTS,
     linkopts = select({
     linkopts = select({
         "//absl:windows": [],
         "//absl:windows": [],
+        "//absl:wasm": [],
         "//conditions:default": ["-pthread"],
         "//conditions:default": ["-pthread"],
     }) + ABSL_DEFAULT_LINKOPTS,
     }) + ABSL_DEFAULT_LINKOPTS,
     deps = [
     deps = [

absl/synchronization/BUILD.bazel

@@ -90,6 +90,7 @@ cc_library(
     copts = ABSL_DEFAULT_COPTS,
     copts = ABSL_DEFAULT_COPTS,
     linkopts = select({
     linkopts = select({
         "//absl:windows": [],
         "//absl:windows": [],
+        "//absl:wasm": [],
         "//conditions:default": ["-pthread"],
         "//conditions:default": ["-pthread"],
     }) + ABSL_DEFAULT_LINKOPTS,
     }) + ABSL_DEFAULT_LINKOPTS,
     deps = [
     deps = [