Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Support/Host.h b/linux-x64/clang/include/llvm/Support/Host.h
new file mode 100644
index 0000000..ddc5fa5
--- /dev/null
+++ b/linux-x64/clang/include/llvm/Support/Host.h
@@ -0,0 +1,99 @@
+//===- llvm/Support/Host.h - Host machine characteristics --------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Methods for querying the nature of the host machine.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_HOST_H
+#define LLVM_SUPPORT_HOST_H
+
+#include "llvm/ADT/StringMap.h"
+
+#if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__)
+#include <endian.h>
+#elif defined(_AIX)
+#include <sys/machine.h>
+#elif defined(__sun)
+/* Solaris provides _BIG_ENDIAN/_LITTLE_ENDIAN selector in sys/types.h */
+#include <sys/types.h>
+#define BIG_ENDIAN 4321
+#define LITTLE_ENDIAN 1234
+#if defined(_BIG_ENDIAN)
+#define BYTE_ORDER BIG_ENDIAN
+#else
+#define BYTE_ORDER LITTLE_ENDIAN
+#endif
+#else
+#if !defined(BYTE_ORDER) && !defined(LLVM_ON_WIN32)
+#include <machine/endian.h>
+#endif
+#endif
+
+#include <string>
+
+namespace llvm {
+namespace sys {
+
+#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
+constexpr bool IsBigEndianHost = true;
+#else
+constexpr bool IsBigEndianHost = false;
+#endif
+
+ static const bool IsLittleEndianHost = !IsBigEndianHost;
+
+ /// getDefaultTargetTriple() - Return the default target triple the compiler
+ /// has been configured to produce code for.
+ ///
+ /// The target triple is a string in the format of:
+ /// CPU_TYPE-VENDOR-OPERATING_SYSTEM
+ /// or
+ /// CPU_TYPE-VENDOR-KERNEL-OPERATING_SYSTEM
+ std::string getDefaultTargetTriple();
+
+ /// getProcessTriple() - Return an appropriate target triple for generating
+ /// code to be loaded into the current process, e.g. when using the JIT.
+ std::string getProcessTriple();
+
+ /// getHostCPUName - Get the LLVM name for the host CPU. The particular format
+ /// of the name is target dependent, and suitable for passing as -mcpu to the
+ /// target which matches the host.
+ ///
+ /// \return - The host CPU name, or empty if the CPU could not be determined.
+ StringRef getHostCPUName();
+
+ /// getHostCPUFeatures - Get the LLVM names for the host CPU features.
+ /// The particular format of the names are target dependent, and suitable for
+ /// passing as -mattr to the target which matches the host.
+ ///
+ /// \param Features - A string mapping feature names to either
+ /// true (if enabled) or false (if disabled). This routine makes no guarantees
+ /// about exactly which features may appear in this map, except that they are
+ /// all valid LLVM feature names.
+ ///
+ /// \return - True on success.
+ bool getHostCPUFeatures(StringMap<bool> &Features);
+
+ /// Get the number of physical cores (as opposed to logical cores returned
+ /// from thread::hardware_concurrency(), which includes hyperthreads).
+ /// Returns -1 if unknown for the current host system.
+ int getHostNumPhysicalCores();
+
+ namespace detail {
+ /// Helper functions to extract HostCPUName from /proc/cpuinfo on linux.
+ StringRef getHostCPUNameForPowerPC(StringRef ProcCpuinfoContent);
+ StringRef getHostCPUNameForARM(StringRef ProcCpuinfoContent);
+ StringRef getHostCPUNameForS390x(StringRef ProcCpuinfoContent);
+ StringRef getHostCPUNameForBPF();
+ }
+}
+}
+
+#endif