Initial implementation of the Path operating system concept.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16048 91177308-0d34-0410-b5e6-96231b3b80d8

lib/System/Unix/Unix.h

@@ -0,0 +1,34 @@
+//===- llvm/System/Unix/Unix.h - Common Unix Include File -----*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Reid Spencer and is distributed under the 
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file defines things specific to Unix implementations.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//===          is guaranteed to work on all UNIX variants.
+//===----------------------------------------------------------------------===//
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+
+inline void ThrowErrno(const std::string& prefix) {
+#if defined __USE_XOPEN2K || defined __USE_MISC
+    char buffer[MAXPATHLEN];
+    strerror_r(errno,buffer, MAXPATHLEN);
+    throw prefix + ": " + buffer;
+#else
+    throw prefix + ": " + strerror(errno);
+#endif
+}