PR17977: don't assume EOWNERDEAD is always defined

Summary: See details in http://llvm.org/bugs/show_bug.cgi?id=17977

Reviewers: dvyukov

Reviewed By: dvyukov

CC: glider, llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D2340

llvm-svn: 196779

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cc

@@ -762,7 +762,12 @@ namespace __sanitizer {
   unsigned IOCTL_TIOCSSERIAL = TIOCSSERIAL;
 #endif
 
+// EOWNERDEAD is not present in some older platforms.
+#if defined(EOWNERDEAD)
   extern const int errno_EOWNERDEAD = EOWNERDEAD;
+#else
+  extern const int errno_EOWNERDEAD = -1;
+#endif
 }  // namespace __sanitizer
 
 COMPILER_CHECK(sizeof(__sanitizer_pthread_attr_t) >= sizeof(pthread_attr_t));