Index: /lldb/trunk/include/lldb/Host/windows/PosixApi.h
===================================================================
--- /lldb/trunk/include/lldb/Host/windows/PosixApi.h
+++ /lldb/trunk/include/lldb/Host/windows/PosixApi.h
@@ -98,19 +98,19 @@
 int strncasecmp(const char *s1, const char *s2, size_t n);
 
 // empty functions
-inline int posix_openpt(int flag) { LLVM_BUILTIN_UNREACHABLE; }
+inline int posix_openpt(int flag) { return 0; }
 
 inline int strerror_r(int errnum, char *buf, size_t buflen) {
-  LLVM_BUILTIN_UNREACHABLE;
+  return 0;
 }
 
-inline int unlockpt(int fd) { LLVM_BUILTIN_UNREACHABLE; }
-inline int grantpt(int fd) { LLVM_BUILTIN_UNREACHABLE; }
-inline char *ptsname(int fd) { LLVM_BUILTIN_UNREACHABLE; }
 
-inline pid_t fork(void) { LLVM_BUILTIN_UNREACHABLE; }
-inline pid_t setsid(void) { LLVM_BUILTIN_UNREACHABLE; }
+inline int unlockpt(int fd) { return 0; }
+inline int grantpt(int fd) { return 0; }
+inline char *ptsname(int fd) { return 0; }
 
+inline pid_t fork(void) { return 0; }
+inline pid_t setsid(void) { return 0; }
 // vsnprintf and snprintf are provided in MSVC 2015 and higher.
 #if _MSC_VER < 1900
 namespace lldb_private {