libc++: support NaCl when building thread.cpp
Summary: NaCl shouldn't include sysctl.h when trying to determine std::thread::hardware_concurrency, it should instead use sysconf(_SC_NPROCESSORS_ONLN) through unistd.h. No test needs to be changed, since hardware_concurrency.pass.cpp already tests that std::thread::hardware_concurrency > 0.
Test Plan: make check-libcxx
Reviewers: dschuff, danalbert
Subscribers: jfb, cfe-commits
Differential Revision: http://reviews.llvm.org/D6470
llvm-svn: 223128
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: b1ba015b9f9e4d2c4d2a5fe6ea8dc5580a391df1
diff --git a/src/thread.cpp b/src/thread.cpp
index 0ced1e3..6aad558 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -17,10 +17,10 @@
#include "limits"
#include <sys/types.h>
#if !defined(_WIN32)
-#if !defined(__sun__) && !defined(__linux__) && !defined(_AIX)
-#include <sys/sysctl.h>
-#endif // !__sun__ && !__linux__ && !_AIX
-#include <unistd.h>
+# if !defined(__sun__) && !defined(__linux__) && !defined(_AIX) && !defined(__native_client__)
+# include <sys/sysctl.h>
+# endif // !defined(__sun__) && !defined(__linux__) && !defined(_AIX) && !defined(__native_client__)
+# include <unistd.h>
#endif // !_WIN32
#if defined(__NetBSD__)