diff --git a/build_defs.bzl b/build_defs.bzl
--- a/build_defs.bzl
+++ b/build_defs.bzl
@@ -345,7 +345,7 @@ def xnnpack_cc_library(
             "//build_config:emscripten_wasm": wasm_srcs,
             "//build_config:emscripten_wasmsimd": wasmsimd_srcs,
             "//build_config:emscripten_wasmrelaxedsimd": wasmrelaxedsimd_srcs,
-            "//conditions:default": [],
+            "//conditions:default": x86_srcs,
         }),
         copts = copts + select({
             "//build_config:linux_k8": gcc_x86_copts,
@@ -378,7 +378,7 @@ def xnnpack_cc_library(
             "//build_config:emscripten_wasm": wasm_copts,
             "//build_config:emscripten_wasmsimd": wasmsimd_copts,
             "//build_config:emscripten_wasmrelaxedsimd": wasmrelaxedsimd_copts,
-            "//conditions:default": [],
+            "//conditions:default": [opt for opt in gcc_x86_copts],
         }) + select({
             "//build_config:windows_x86_64_clangcl": ["/clang:" + opt for opt in gcc_copts],
             "//build_config:windows_x86_64_clang": gcc_copts,
@@ -402,7 +402,7 @@ def xnnpack_cc_library(
             "//build_config:linux_armhf": ["-lpthread"],
             "//build_config:linux_armv7a": ["-lpthread"],
             "//build_config:linux_arm64": ["-lpthread"],
             "//build_config:android": ["-lm"],
-            "//conditions:default": [],
+            "//conditions:default": ["-lpthread"],
         }),
         hdrs = hdrs,
         visibility = visibility,