Prune #includes from llvm/Linker.h and llvm/System/Path.h,
forcing them down into various .cpp files.

This change also:
1. Renames TimeValue::toString() and Path::toString() to ::str()
   for similarity with the STL.
2. Removes all stream insertion support for sys::Path, forcing
   clients to call .str().
3. Removes a use of Config/alloca.h from bugpoint, using smallvector
   instead.
4. Weans llvm-db off <iostream>

sys::Path really needs to be gutted, but I don't have the desire to
do it at this point.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79869 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Unix/Path.inc b/lib/System/Unix/Path.inc
index a54fcfd..7139f4e 100644
--- a/lib/System/Unix/Path.inc
+++ b/lib/System/Unix/Path.inc
@@ -119,7 +119,7 @@
 
   CWD.appendComponent(path);
 
-  path = CWD.toString();
+  path = CWD.str();
 }
 
 Path
@@ -502,7 +502,7 @@
 
   // Get the file's current mode.
   struct stat buf;
-  if (0 != stat(File.toString().c_str(), &buf))
+  if (0 != stat(File.c_str(), &buf))
     return false;
   // Change the file to have whichever permissions bits from 'bits'
   // that the umask would not disable.
@@ -759,7 +759,7 @@
 Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) {
   if (0 != ::rename(path.c_str(), newName.c_str()))
     return MakeErrMsg(ErrMsg, std::string("can't rename '") + path + "' as '" +
-               newName.toString() + "'");
+               newName.str() + "'");
   return false;
 }
 
@@ -781,13 +781,13 @@
   int outFile = -1;
   inFile = ::open(Src.c_str(), O_RDONLY);
   if (inFile == -1)
-    return MakeErrMsg(ErrMsg, Src.toString() +
+    return MakeErrMsg(ErrMsg, Src.str() +
       ": can't open source file to copy");
 
   outFile = ::open(Dest.c_str(), O_WRONLY|O_CREAT, 0666);
   if (outFile == -1) {
     ::close(inFile);
-    return MakeErrMsg(ErrMsg, Dest.toString() +
+    return MakeErrMsg(ErrMsg, Dest.str() +
       ": can't create destination file for copy");
   }
 
@@ -797,7 +797,7 @@
       if (errno != EINTR && errno != EAGAIN) {
         ::close(inFile);
         ::close(outFile);
-        return MakeErrMsg(ErrMsg, Src.toString()+": can't read source file");
+        return MakeErrMsg(ErrMsg, Src.str()+": can't read source file");
       }
     } else {
       char *BufPtr = Buffer;
@@ -807,7 +807,7 @@
           if (errno != EINTR && errno != EAGAIN) {
             ::close(inFile);
             ::close(outFile);
-            return MakeErrMsg(ErrMsg, Dest.toString() +
+            return MakeErrMsg(ErrMsg, Dest.str() +
               ": can't write destination file");
           }
         } else {
diff --git a/lib/System/Unix/Program.inc b/lib/System/Unix/Program.inc
index 14bc7b1..84e025c 100644
--- a/lib/System/Unix/Program.inc
+++ b/lib/System/Unix/Program.inc
@@ -97,7 +97,7 @@
     // Redirect empty paths to /dev/null
     File = "/dev/null";
   else
-    File = Path->toString();
+    File = Path->str();
 
   // Open the file
   int InFD = open(File.c_str(), FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666);
@@ -156,7 +156,7 @@
 {
   if (!path.canExecute()) {
     if (ErrMsg)
-      *ErrMsg = path.toString() + " is not executable";
+      *ErrMsg = path.str() + " is not executable";
     return false;
   }
 
diff --git a/lib/System/Unix/TimeValue.inc b/lib/System/Unix/TimeValue.inc
index 8dd30b9..1ae8c71 100644
--- a/lib/System/Unix/TimeValue.inc
+++ b/lib/System/Unix/TimeValue.inc
@@ -21,7 +21,7 @@
 namespace llvm {
   using namespace sys;
 
-std::string TimeValue::toString() const {
+std::string TimeValue::str() const {
   char buffer[32];
 
   time_t ourTime = time_t(this->toEpochTime());