diff --git a/build_defs.bzl b/build_defs.bzl
index 01b436eb7..ca4abd54d 100644
--- a/build_defs.bzl
+++ b/build_defs.bzl
@@ -146,7 +146,7 @@ def xnnpack_cc_library(
             ":emscripten_wasm": wasm_srcs,
             ":emscripten_wasmsimd": wasmsimd_srcs,
             ":emscripten_wasmrelaxedsimd": wasmrelaxedsimd_srcs,
-            "//conditions:default": [],
+            "//conditions:default": x86_srcs,
         }),
         copts = [
             "-Iinclude",
@@ -179,7 +179,7 @@ def xnnpack_cc_library(
             ":emscripten_wasm": wasm_copts,
             ":emscripten_wasmsimd": wasmsimd_copts,
             ":emscripten_wasmrelaxedsimd": wasmrelaxedsimd_copts,
-            "//conditions:default": [],
+            "//conditions:default": [opt for opt in gcc_x86_copts],
         }) + select({
             ":windows_x86_64_clang": ["/clang:" + opt for opt in gcc_copts],
             ":windows_x86_64_mingw": gcc_copts,
@@ -202,7 +202,7 @@ def xnnpack_cc_library(
             ":linux_armv7a": ["-lpthread"],
             ":linux_arm64": ["-lpthread"],
             ":android": ["-lm"],
-            "//conditions:default": [],
+            "//conditions:default": ["-lpthread"],
         }),
         textual_hdrs = hdrs,
         visibility = visibility,
@@ -249,6 +249,7 @@ def xnnpack_aggregate_library(
             ":emscripten_wasmsimd": wasmsimd_deps,
             ":emscripten_wasmrelaxedsimd": wasmrelaxedsimd_deps,
             ":riscv": riscv_deps,
+            "//conditions:default": x86_deps,
         }),
         defines = defines,
         compatible_with = compatible_with,
diff --git a/src/runtime.c b/src/runtime.c
index 0c4649017..29e74a85b 100644
--- a/src/runtime.c
+++ b/src/runtime.c
@@ -4,7 +4,7 @@
 // LICENSE file in the root directory of this source tree.
 
 #ifndef __MACH__
-#define _POSIX_C_SOURCE 199309L
+#define _POSIX_C_SOURCE 199506L
 #endif
 
 #include <assert.h>