X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSupport%2FCommandLine.cpp;h=6ab03dc675d8327549a36460ec81c6c3a5276594;hb=e2ff00e117ba9b758b298e671f65c0b002f8a52d;hp=18d3db527bec4798d0c370060bc467a0e07bf844;hpb=61e01721978af4c2979c4b9153e56e72eb6389fb;p=oota-llvm.git

diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index 18d3db527be..6ab03dc675d 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -58,7 +58,6 @@ TEMPLATE_INSTANTIATION(class opt<char>);
 TEMPLATE_INSTANTIATION(class opt<bool>);
 } } // end namespace llvm::cl
 
-void GenericOptionValue::anchor() {}
 void OptionValue<boolOrDefault>::anchor() {}
 void OptionValue<std::string>::anchor() {}
 void Option::anchor() {}
@@ -513,27 +512,16 @@ static void ExpandResponseFiles(unsigned argc, const char*const* argv,
     const char *arg = argv[i];
 
     if (arg[0] == '@') {
-      sys::PathWithStatus respFile(++arg);
-
-      // Check that the response file is not empty (mmap'ing empty
-      // files can be problematic).
-      const sys::FileStatus *FileStat = respFile.getFileStatus();
-      if (FileStat && FileStat->getSize() != 0) {
-
-        // If we could open the file, parse its contents, otherwise
-        // pass the @file option verbatim.
-
-        // TODO: we should also support recursive loading of response files,
-        // since this is how gcc behaves. (From their man page: "The file may
-        // itself contain additional @file options; any such options will be
-        // processed recursively.")
-
-        // Mmap the response file into memory.
-        OwningPtr<MemoryBuffer> respFilePtr;
-        if (!MemoryBuffer::getFile(respFile.c_str(), respFilePtr)) {
-          ParseCStringVector(newArgv, respFilePtr->getBufferStart());
-          continue;
-        }
+      // TODO: we should also support recursive loading of response files,
+      // since this is how gcc behaves. (From their man page: "The file may
+      // itself contain additional @file options; any such options will be
+      // processed recursively.")
+
+      // Mmap the response file into memory.
+      OwningPtr<MemoryBuffer> respFilePtr;
+      if (!MemoryBuffer::getFile(arg + 1, respFilePtr)) {
+        ParseCStringVector(newArgv, respFilePtr->getBufferStart());
+        continue;
       }
     }
     newArgv.push_back(strdup(arg));
@@ -913,11 +901,20 @@ size_t alias::getOptionWidth() const {
   return std::strlen(ArgStr)+6;
 }
 
+static void printHelpStr(StringRef HelpStr, size_t Indent,
+                         size_t FirstLineIndentedBy) {
+  std::pair<StringRef, StringRef> Split = HelpStr.split('\n');
+  outs().indent(Indent - FirstLineIndentedBy) << " - " << Split.first << "\n";
+  while (!Split.second.empty()) {
+    Split = Split.second.split('\n');
+    outs().indent(Indent) << Split.first << "\n";
+  }
+}
+
 // Print out the option for the alias.
 void alias::printOptionInfo(size_t GlobalWidth) const {
-  size_t L = std::strlen(ArgStr);
   outs() << "  -" << ArgStr;
-  outs().indent(GlobalWidth-L-6) << " - " << HelpStr << "\n";
+  printHelpStr(HelpStr, GlobalWidth, std::strlen(ArgStr) + 6);
 }
 
 //===----------------------------------------------------------------------===//
@@ -946,7 +943,7 @@ void basic_parser_impl::printOptionInfo(const Option &O,
   if (const char *ValName = getValueName())
     outs() << "=<" << getValueStr(O, ValName) << '>';
 
-  outs().indent(GlobalWidth-getOptionWidth(O)) << " - " << O.HelpStr << '\n';
+  printHelpStr(O.HelpStr, GlobalWidth, getOptionWidth(O));
 }
 
 void basic_parser_impl::printOptionName(const Option &O,
@@ -1087,9 +1084,8 @@ size_t generic_parser_base::getOptionWidth(const Option &O) const {
 void generic_parser_base::printOptionInfo(const Option &O,
                                           size_t GlobalWidth) const {
   if (O.hasArgStr()) {
-    size_t L = std::strlen(O.ArgStr);
     outs() << "  -" << O.ArgStr;
-    outs().indent(GlobalWidth-L-6) << " - " << O.HelpStr << '\n';
+    printHelpStr(O.HelpStr, GlobalWidth, std::strlen(O.ArgStr) + 6);
 
     for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
       size_t NumSpaces = GlobalWidth-strlen(getOption(i))-8;
@@ -1100,9 +1096,9 @@ void generic_parser_base::printOptionInfo(const Option &O,
     if (O.HelpStr[0])
       outs() << "  " << O.HelpStr << '\n';
     for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
-      size_t L = std::strlen(getOption(i));
-      outs() << "    -" << getOption(i);
-      outs().indent(GlobalWidth-L-8) << " - " << getDescription(i) << '\n';
+      const char *Option = getOption(i);
+      outs() << "    -" << Option;
+      printHelpStr(getDescription(i), GlobalWidth, std::strlen(Option) + 8);
     }
   }
 }