--- a/build_defs.bzl    2022-08-28 12:18:33.375130000 +0100
+++ b/build_defs.bzl	2022-08-28 12:21:40.701070000 +0100
@@ -173,7 +173,7 @@
             ":emscripten_wasm": wasm_srcs,
             ":emscripten_wasmsimd": wasmsimd_srcs,
             ":emscripten_wasmrelaxedsimd": wasmrelaxedsimd_srcs,
-            "//conditions:default": [],
+            "//conditions:default": x86_srcs,
         }),
         copts = [
             "-Iinclude",
@@ -210,7 +210,7 @@
             ":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,
@@ -233,7 +233,7 @@
             ":linux_armv7a": ["-lpthread"],
             ":linux_arm64": ["-lpthread"],
             ":android": ["-lm"],
-            "//conditions:default": [],
+            "//conditions:default": ["-lpthread"],
         }),
         textual_hdrs = hdrs,
         visibility = visibility,
@@ -304,6 +304,7 @@
             ":emscripten_wasm": wasm_deps,
             ":emscripten_wasmsimd": wasmsimd_deps,
             ":emscripten_wasmrelaxedsimd": wasmrelaxedsimd_deps,
+            "//conditions:default": x86_deps,
         }),
     )