[PATCH] PR17977: don't assume EOWNERDEAD is always defined

[Alexey Samsonov]

Hi dvyukov,

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

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

Files:
  lib/sanitizer_common/sanitizer_platform_limits_posix.cc

Index: lib/sanitizer_common/sanitizer_platform_limits_posix.cc
===================================================================
--- lib/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ lib/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -762,7 +762,12 @@
   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));
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