diff --git a/lldb/include/lldb/Host/HostInfo.h b/lldb/include/lldb/Host/HostInfo.h
--- a/lldb/include/lldb/Host/HostInfo.h
+++ b/lldb/include/lldb/Host/HostInfo.h
@@ -35,7 +35,7 @@
 #if defined(_WIN32)
 #include "lldb/Host/windows/HostInfoWindows.h"
 #define HOST_INFO_TYPE HostInfoWindows
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__EMSCRIPTEN__)
 #if defined(__ANDROID__)
 #include "lldb/Host/android/HostInfoAndroid.h"
 #define HOST_INFO_TYPE HostInfoAndroid
diff --git a/lldb/source/Host/common/Host.cpp b/lldb/source/Host/common/Host.cpp
--- a/lldb/source/Host/common/Host.cpp
+++ b/lldb/source/Host/common/Host.cpp
@@ -28,7 +28,7 @@
 
 #if defined(__linux__) || defined(__FreeBSD__) ||                              \
     defined(__FreeBSD_kernel__) || defined(__APPLE__) ||                       \
-    defined(__NetBSD__) || defined(__OpenBSD__)
+    defined(__NetBSD__) || defined(__OpenBSD__) || defined(__EMSCRIPTEN__)
 #if !defined(__ANDROID__)
 #include <spawn.h>
 #endif
diff --git a/llvm/include/llvm/Support/SwapByteOrder.h b/llvm/include/llvm/Support/SwapByteOrder.h
--- a/llvm/include/llvm/Support/SwapByteOrder.h
+++ b/llvm/include/llvm/Support/SwapByteOrder.h
@@ -21,7 +21,8 @@
 #include <stdlib.h>
 #endif
 
-#if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__)
+#if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__) ||            \
+    defined(__EMSCRIPTEN__)
 #include <endian.h>
 #elif defined(_AIX)
 #include <sys/machine.h>