See https://bugzilla.mozilla.org/show_bug.cgi?id=1539739

From fd6847c9416f9eebde636e21d794d25d1be8791d Mon Sep 17 00:00:00 2001
From: Mike Hommey <mh@glandium.org>
Date: Sat, 1 Jun 2019 09:06:01 +0900
Subject: [PATCH] Bug 1526653 - Include struct definitions for user_vfp and
 user_vfp_exc.

---
 js/src/wasm/WasmSignalHandlers.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/js/src/wasm/WasmSignalHandlers.cpp b/js/src/wasm/WasmSignalHandlers.cpp
index 636537f8478..383c380f04c 100644
--- a/js/src/wasm/WasmSignalHandlers.cpp
+++ b/js/src/wasm/WasmSignalHandlers.cpp
@@ -248,7 +248,16 @@ using mozilla::DebugOnly;
 #endif
 
 #ifdef WASM_EMULATE_ARM_UNALIGNED_FP_ACCESS
-#  include <sys/user.h>
+struct user_vfp {
+  unsigned long long fpregs[32];
+  unsigned long fpscr;
+};
+
+struct user_vfp_exc {
+  unsigned long fpexc;
+  unsigned long fpinst;
+  unsigned long fpinst2;
+};
 #endif
 
 #if defined(ANDROID)
-- 
2.20.1