Merge branch 'master' of github.com:martine/ninja

9 files changed, 542 insertions, 9 deletions

diff --git a/src/includes_normalize-win32.cc b/src/includes_normalize-win32.cc
new file mode 100644
index 0000000..134cfb8
--- /dev/null
+++ b/src/includes_normalize-win32.cc
@@ -0,0 +1,115 @@
+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "includes_normalize.h"
+
+#include "string_piece.h"
+#include "util.h"
+
+#include <algorithm>
+#include <iterator>
+#include <sstream>
+
+#include <windows.h>
+
+namespace {
+
+/// Return true if paths a and b are on the same Windows drive.
+bool SameDrive(StringPiece a, StringPiece b)  {
+  char a_absolute[_MAX_PATH];
+  char b_absolute[_MAX_PATH];
+  GetFullPathName(a.AsString().c_str(), sizeof(a_absolute), a_absolute, NULL);
+  GetFullPathName(b.AsString().c_str(), sizeof(b_absolute), b_absolute, NULL);
+  char a_drive[_MAX_DIR];
+  char b_drive[_MAX_DIR];
+  _splitpath(a_absolute, a_drive, NULL, NULL, NULL);
+  _splitpath(b_absolute, b_drive, NULL, NULL, NULL);
+  return _stricmp(a_drive, b_drive) == 0;
+}
+
+}  // anonymous namespace
+
+string IncludesNormalize::Join(const vector<string>& list, char sep) {
+  string ret;
+  for (size_t i = 0; i < list.size(); ++i) {
+    ret += list[i];
+    if (i != list.size() - 1)
+      ret += sep;
+  }
+  return ret;
+}
+
+vector<string> IncludesNormalize::Split(const string& input, char sep) {
+  vector<string> elems;
+  stringstream ss(input);
+  string item;
+  while (getline(ss, item, sep))
+    elems.push_back(item);
+  return elems;
+}
+
+string IncludesNormalize::ToLower(const string& s) {
+  string ret;
+  transform(s.begin(), s.end(), back_inserter(ret), tolower);
+  return ret;
+}
+
+string IncludesNormalize::AbsPath(StringPiece s) {
+  char result[_MAX_PATH];
+  GetFullPathName(s.AsString().c_str(), sizeof(result), result, NULL);
+  return result;
+}
+
+string IncludesNormalize::Relativize(StringPiece path, const string& start) {
+  vector<string> start_list = Split(AbsPath(start), '\\');
+  vector<string> path_list = Split(AbsPath(path), '\\');
+  int i;
+  for (i = 0; i < static_cast<int>(min(start_list.size(), path_list.size()));
+       ++i) {
+    if (ToLower(start_list[i]) != ToLower(path_list[i]))
+      break;
+  }
+
+  vector<string> rel_list;
+  for (int j = 0; j < static_cast<int>(start_list.size() - i); ++j)
+    rel_list.push_back("..");
+  for (int j = i; j < static_cast<int>(path_list.size()); ++j)
+    rel_list.push_back(path_list[j]);
+  if (rel_list.size() == 0)
+    return ".";
+  return Join(rel_list, '\\');
+}
+
+string IncludesNormalize::Normalize(const string& input,
+                                    const char* relative_to) {
+  char copy[_MAX_PATH];
+  size_t len = input.size();
+  strncpy(copy, input.c_str(), input.size() + 1);
+  for (size_t j = 0; j < len; ++j)
+    if (copy[j] == '/')
+      copy[j] = '\\';
+  string err;
+  if (!CanonicalizePath(copy, &len, &err)) {
+    Warning("couldn't canonicalize '%s: %s\n", input.c_str(), err.c_str());
+  }
+  string curdir;
+  if (!relative_to) {
+    curdir = AbsPath(".");
+    relative_to = curdir.c_str();
+  }
+  StringPiece partially_fixed(copy, len);
+  if (!SameDrive(partially_fixed, relative_to))
+    return ToLower(partially_fixed.AsString());
+  return ToLower(Relativize(partially_fixed, relative_to));
+}
diff --git a/src/includes_normalize.h b/src/includes_normalize.h
new file mode 100644
index 0000000..43527af
--- /dev/null
+++ b/src/includes_normalize.h
@@ -0,0 +1,35 @@
+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <string>
+#include <vector>
+using namespace std;
+
+struct StringPiece;
+
+/// Utility functions for normalizing include paths on Windows.
+/// TODO: this likely duplicates functionality of CanonicalizePath; refactor.
+struct IncludesNormalize {
+  // Internal utilities made available for testing, maybe useful otherwise.
+  static string Join(const vector<string>& list, char sep);
+  static vector<string> Split(const string& input, char sep);
+  static string ToLower(const string& s);
+  static string AbsPath(StringPiece s);
+  static string Relativize(StringPiece path, const string& start);
+
+  /// Normalize by fixing slashes style, fixing redundant .. and . and makes the
+  /// path relative to |relative_to|. Case is normalized to lowercase on
+  /// Windows too.
+  static string Normalize(const string& input, const char* relative_to);
+};
diff --git a/src/includes_normalize_test.cc b/src/includes_normalize_test.cc
new file mode 100644
index 0000000..77b5b3b
--- /dev/null
+++ b/src/includes_normalize_test.cc
@@ -0,0 +1,98 @@
+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "includes_normalize.h"
+
+#include <gtest/gtest.h>
+
+#include "test.h"
+#include "util.h"
+
+TEST(IncludesNormalize, Simple) {
+  EXPECT_EQ("b", IncludesNormalize::Normalize("a\\..\\b", NULL));
+  EXPECT_EQ("b", IncludesNormalize::Normalize("a\\../b", NULL));
+  EXPECT_EQ("a\\b", IncludesNormalize::Normalize("a\\.\\b", NULL));
+  EXPECT_EQ("a\\b", IncludesNormalize::Normalize("a\\./b", NULL));
+}
+
+namespace {
+
+string GetCurDir() {
+  char buf[_MAX_PATH];
+  _getcwd(buf, sizeof(buf));
+  vector<string> parts = IncludesNormalize::Split(string(buf), '\\');
+  return parts[parts.size() - 1];
+}
+
+}  // namespace
+
+TEST(IncludesNormalize, WithRelative) {
+  string currentdir = IncludesNormalize::ToLower(GetCurDir());
+  EXPECT_EQ("c", IncludesNormalize::Normalize("a/b/c", "a/b"));
+  EXPECT_EQ("a", IncludesNormalize::Normalize(IncludesNormalize::AbsPath("a"), NULL));
+  EXPECT_EQ(string("..\\") + currentdir + string("\\a"),
+            IncludesNormalize::Normalize("a", "../b"));
+  EXPECT_EQ(string("..\\") + currentdir + string("\\a\\b"),
+            IncludesNormalize::Normalize("a/b", "../c"));
+  EXPECT_EQ("..\\..\\a", IncludesNormalize::Normalize("a", "b/c"));
+  EXPECT_EQ(".", IncludesNormalize::Normalize("a", "a"));
+}
+
+TEST(IncludesNormalize, Case) {
+  EXPECT_EQ("b", IncludesNormalize::Normalize("Abc\\..\\b", NULL));
+  EXPECT_EQ("bdef", IncludesNormalize::Normalize("Abc\\..\\BdEf", NULL));
+  EXPECT_EQ("a\\b", IncludesNormalize::Normalize("A\\.\\b", NULL));
+  EXPECT_EQ("a\\b", IncludesNormalize::Normalize("A\\./b", NULL));
+  EXPECT_EQ("a\\b", IncludesNormalize::Normalize("A\\.\\B", NULL));
+  EXPECT_EQ("a\\b", IncludesNormalize::Normalize("A\\./B", NULL));
+}
+
+TEST(IncludesNormalize, Join) {
+  vector<string> x;
+  EXPECT_EQ("", IncludesNormalize::Join(x, ':'));
+  x.push_back("alpha");
+  EXPECT_EQ("alpha", IncludesNormalize::Join(x, ':'));
+  x.push_back("beta");
+  x.push_back("gamma");
+  EXPECT_EQ("alpha:beta:gamma", IncludesNormalize::Join(x, ':'));
+}
+
+TEST(IncludesNormalize, Split) {
+  EXPECT_EQ("", IncludesNormalize::Join(IncludesNormalize::Split("", '/'), ':'));
+  EXPECT_EQ("a", IncludesNormalize::Join(IncludesNormalize::Split("a", '/'), ':'));
+  EXPECT_EQ("a:b:c", IncludesNormalize::Join(IncludesNormalize::Split("a/b/c", '/'), ':'));
+}
+
+TEST(IncludesNormalize, ToLower) {
+  EXPECT_EQ("", IncludesNormalize::ToLower(""));
+  EXPECT_EQ("stuff", IncludesNormalize::ToLower("Stuff"));
+  EXPECT_EQ("stuff and things", IncludesNormalize::ToLower("Stuff AND thINGS"));
+  EXPECT_EQ("stuff 3and thin43gs", IncludesNormalize::ToLower("Stuff 3AND thIN43GS"));
+}
+
+TEST(IncludesNormalize, DifferentDrive) {
+  EXPECT_EQ("stuff.h",
+      IncludesNormalize::Normalize("p:\\vs08\\stuff.h", "p:\\vs08"));
+  EXPECT_EQ("stuff.h",
+      IncludesNormalize::Normalize("P:\\vs08\\stuff.h", "p:\\vs08"));
+  EXPECT_EQ("p:\\vs08\\stuff.h",
+      IncludesNormalize::Normalize("P:\\vs08\\stuff.h", "c:\\vs08"));
+  EXPECT_EQ("p:\\vs08\\stuff.h",
+      IncludesNormalize::Normalize("P:\\vs08\\stuff.h", "D:\\stuff/things"));
+  EXPECT_EQ("p:\\vs08\\stuff.h",
+      IncludesNormalize::Normalize("P:/vs08\\stuff.h", "D:\\stuff/things"));
+  // TODO: this fails; fix it.
+  //EXPECT_EQ("P:\\wee\\stuff.h",
+  //    IncludesNormalize::Normalize("P:/vs08\\../wee\\stuff.h", "D:\\stuff/things"));
+}
diff --git a/src/msvc_helper-win32.cc b/src/msvc_helper-win32.cc
new file mode 100644
index 0000000..624bc2d
--- /dev/null
+++ b/src/msvc_helper-win32.cc
@@ -0,0 +1,164 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "msvc_helper.h"
+
+#include <string.h>
+#include <windows.h>
+
+#include "includes_normalize.h"
+#include "util.h"
+
+namespace {
+
+/// Return true if \a input ends with \a needle.
+bool EndsWith(const string& input, const string& needle) {
+  return (input.size() >= needle.size() &&
+          input.substr(input.size() - needle.size()) == needle);
+}
+
+}  // anonymous namespace
+
+// static
+string CLWrapper::FilterShowIncludes(const string& line) {
+  static const char kMagicPrefix[] = "Note: including file: ";
+  const char* in = line.c_str();
+  const char* end = in + line.size();
+
+  if (end - in > (int)sizeof(kMagicPrefix) - 1 &&
+      memcmp(in, kMagicPrefix, sizeof(kMagicPrefix) - 1) == 0) {
+    in += sizeof(kMagicPrefix) - 1;
+    while (*in == ' ')
+      ++in;
+    return line.substr(in - line.c_str());
+  }
+  return "";
+}
+
+// static
+bool CLWrapper::IsSystemInclude(const string& path) {
+  // TODO: this is a heuristic, perhaps there's a better way?
+  return (path.find("program files") != string::npos ||
+          path.find("microsoft visual studio") != string::npos);
+}
+
+// static
+bool CLWrapper::FilterInputFilename(const string& line) {
+  // TODO: other extensions, like .asm?
+  return EndsWith(line, ".c") ||
+      EndsWith(line, ".cc") ||
+      EndsWith(line, ".cxx") ||
+      EndsWith(line, ".cpp");
+}
+
+int CLWrapper::Run(const string& command, string* extra_output) {
+  SECURITY_ATTRIBUTES security_attributes = {};
+  security_attributes.nLength = sizeof(SECURITY_ATTRIBUTES);
+  security_attributes.bInheritHandle = TRUE;
+
+  // Must be inheritable so subprocesses can dup to children.
+  HANDLE nul = CreateFile("NUL", GENERIC_READ,
+                          FILE_SHARE_READ | FILE_SHARE_WRITE |
+                          FILE_SHARE_DELETE,
+                          &security_attributes, OPEN_EXISTING, 0, NULL);
+  if (nul == INVALID_HANDLE_VALUE)
+    Fatal("couldn't open nul");
+
+  HANDLE stdout_read, stdout_write;
+  if (!CreatePipe(&stdout_read, &stdout_write, &security_attributes, 0))
+    Win32Fatal("CreatePipe");
+
+  if (!SetHandleInformation(stdout_read, HANDLE_FLAG_INHERIT, 0))
+    Win32Fatal("SetHandleInformation");
+
+  PROCESS_INFORMATION process_info = {};
+  STARTUPINFO startup_info = {};
+  startup_info.cb = sizeof(STARTUPINFO);
+  startup_info.hStdInput = nul;
+  startup_info.hStdError = stdout_write;
+  startup_info.hStdOutput = stdout_write;
+  startup_info.dwFlags |= STARTF_USESTDHANDLES;
+
+  if (!CreateProcessA(NULL, (char*)command.c_str(), NULL, NULL,
+                      /* inherit handles */ TRUE, 0,
+                      NULL, NULL,
+                      &startup_info, &process_info)) {
+    Win32Fatal("CreateProcess");
+  }
+
+  if (!CloseHandle(nul) ||
+      !CloseHandle(stdout_write)) {
+    Win32Fatal("CloseHandle");
+  }
+
+  // Read output of the subprocess and parse it.
+  string output;
+  DWORD read_len = 1;
+  while (read_len) {
+    char buf[64 << 10];
+    read_len = 0;
+    if (!::ReadFile(stdout_read, buf, sizeof(buf), &read_len, NULL) &&
+        GetLastError() != ERROR_BROKEN_PIPE) {
+      Win32Fatal("ReadFile");
+    }
+    output.append(buf, read_len);
+
+    // Loop over all lines in the output and process them.
+    for (;;) {
+      size_t ofs = output.find_first_of("\r\n");
+      if (ofs == string::npos)
+        break;
+      string line = output.substr(0, ofs);
+
+      string include = FilterShowIncludes(line);
+      if (!include.empty()) {
+        include = IncludesNormalize::Normalize(include, NULL);
+        if (!IsSystemInclude(include))
+          includes_.push_back(include);
+      } else if (FilterInputFilename(line)) {
+        // Drop it.
+        // TODO: if we support compiling multiple output files in a single
+        // cl.exe invocation, we should stash the filename.
+      } else {
+        if (extra_output) {
+          extra_output->append(line);
+          extra_output->append("\n");
+        } else {
+          printf("%s\n", line.c_str());
+        }
+      }
+
+      if (ofs < output.size() && output[ofs] == '\r')
+        ++ofs;
+      if (ofs < output.size() && output[ofs] == '\n')
+        ++ofs;
+      output = output.substr(ofs);
+    }
+  }
+
+  if (WaitForSingleObject(process_info.hProcess, INFINITE) == WAIT_FAILED)
+    Win32Fatal("WaitForSingleObject");
+
+  DWORD exit_code = 0;
+  if (!GetExitCodeProcess(process_info.hProcess, &exit_code))
+    Win32Fatal("GetExitCodeProcess");
+
+  if (!CloseHandle(stdout_read) ||
+      !CloseHandle(process_info.hProcess) ||
+      !CloseHandle(process_info.hThread)) {
+    Win32Fatal("CloseHandle");
+  }
+
+  return exit_code;
+}
diff --git a/src/msvc_helper.h b/src/msvc_helper.h
new file mode 100644
index 0000000..41b9f9b
--- /dev/null
+++ b/src/msvc_helper.h
@@ -0,0 +1,47 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <string>
+#include <vector>
+using namespace std;
+
+/// Visual Studio's cl.exe requires some massaging to work with Ninja;
+/// for example, it emits include information on stderr in a funny
+/// format when building with /showIncludes.  This class wraps a CL
+/// process and parses that output to extract the file list.
+struct CLWrapper {
+  /// Start a process and parse its output.  Returns its exit code.
+  /// Any non-parsed output is buffered into \a extra_output if provided,
+  /// otherwise it is printed to stdout while the process runs.
+  /// Crashes (calls Fatal()) on error.
+  int Run(const string& command, string* extra_output=NULL);
+
+  /// Parse a line of cl.exe output and extract /showIncludes info.
+  /// If a dependency is extracted, returns a nonempty string.
+  /// Exposed for testing.
+  static string FilterShowIncludes(const string& line);
+
+  /// Return true if a mentioned include file is a system path.
+  /// Expects the path to already by normalized (including lower case).
+  /// Filtering these out reduces dependency information considerably.
+  static bool IsSystemInclude(const string& path);
+
+  /// Parse a line of cl.exe output and return true if it looks like
+  /// it's printing an input filename.  This is a heuristic but it appears
+  /// to be the best we can do.
+  /// Exposed for testing.
+  static bool FilterInputFilename(const string& line);
+
+  vector<string> includes_;
+};
diff --git a/src/msvc_helper_test.cc b/src/msvc_helper_test.cc
new file mode 100644
index 0000000..b65d66f
--- /dev/null
+++ b/src/msvc_helper_test.cc
@@ -0,0 +1,74 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "msvc_helper.h"
+
+#include <gtest/gtest.h>
+
+#include "test.h"
+#include "util.h"
+
+TEST(MSVCHelperTest, ShowIncludes) {
+  ASSERT_EQ("", CLWrapper::FilterShowIncludes(""));
+
+  ASSERT_EQ("", CLWrapper::FilterShowIncludes("Sample compiler output"));
+  ASSERT_EQ("c:\\Some Files\\foobar.h",
+            CLWrapper::FilterShowIncludes("Note: including file: "
+                                          "c:\\Some Files\\foobar.h"));
+  ASSERT_EQ("c:\\initspaces.h",
+            CLWrapper::FilterShowIncludes("Note: including file:    "
+                                          "c:\\initspaces.h"));
+}
+
+TEST(MSVCHelperTest, FilterInputFilename) {
+  ASSERT_TRUE(CLWrapper::FilterInputFilename("foobar.cc"));
+  ASSERT_TRUE(CLWrapper::FilterInputFilename("foo bar.cc"));
+  ASSERT_TRUE(CLWrapper::FilterInputFilename("baz.c"));
+
+  ASSERT_FALSE(CLWrapper::FilterInputFilename(
+                   "src\\cl_helper.cc(166) : fatal error C1075: end "
+                   "of file found ..."));
+}
+
+TEST(MSVCHelperTest, Run) {
+  CLWrapper cl;
+  string output;
+  cl.Run("cmd /c \"echo foo&& echo Note: including file:  foo.h&&echo bar\"",
+         &output);
+  ASSERT_EQ("foo\nbar\n", output);
+  ASSERT_EQ(1u, cl.includes_.size());
+  ASSERT_EQ("foo.h", cl.includes_[0]);
+}
+
+TEST(MSVCHelperTest, RunFilenameFilter) {
+  CLWrapper cl;
+  string output;
+  cl.Run("cmd /c \"echo foo.cc&& echo cl: warning\"",
+         &output);
+  ASSERT_EQ("cl: warning\n", output);
+}
+
+TEST(MSVCHelperTest, RunSystemInclude) {
+  CLWrapper cl;
+  string output;
+  cl.Run("cmd /c \"echo Note: including file: c:\\Program Files\\foo.h&&"
+         "echo Note: including file: d:\\Microsoft Visual Studio\\bar.h&&"
+         "echo Note: including file: path.h\"",
+         &output);
+  // We should have dropped the first two includes because they look like
+  // system headers.
+  ASSERT_EQ("", output);
+  ASSERT_EQ(1u, cl.includes_.size());
+  ASSERT_EQ("path.h", cl.includes_[0]);
+}
diff --git a/src/subprocess-win32.cc b/src/subprocess-win32.cc
index 38b6957..4b103a5 100644
--- a/src/subprocess-win32.cc
+++ b/src/subprocess-win32.cc
@@ -20,14 +20,6 @@
 
 #include "util.h"
 
-namespace {
-
-void Win32Fatal(const char* function) {
-  Fatal("%s: %s", function, GetLastErrorString().c_str());
-}
-
-}  // anonymous namespace
-
 Subprocess::Subprocess() : child_(NULL) , overlapped_(), is_reading_(false) {
 }
 
diff --git a/src/util.cc b/src/util.cc
index 90a1d45..14f6265 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -247,6 +247,10 @@ string GetLastErrorString() {
   LocalFree(msg_buf);
   return msg;
 }
+
+void Win32Fatal(const char* function) {
+  Fatal("%s: %s", function, GetLastErrorString().c_str());
+}
 #endif
 
 static bool islatinalpha(int c) {
diff --git a/src/util.h b/src/util.h
index ab1882b..3a658fb 100644
--- a/src/util.h
+++ b/src/util.h
@@ -41,7 +41,8 @@ bool CanonicalizePath(string* path, string* err);
 
 bool CanonicalizePath(char* path, size_t* len, string* err);
 
-/// Read a file to a string.
+/// Read a file to a string (in text mode: with CRLF conversion
+/// on Windows).
 /// Returns -errno and fills in \a err on error.
 int ReadFile(const string& path, string* contents, string* err);
 
@@ -81,6 +82,9 @@ string ElideMiddle(const string& str, size_t width);
 #ifdef _WIN32
 /// Convert the value returned by GetLastError() into a string.
 string GetLastErrorString();
+
+/// Calls Fatal() with a function name and GetLastErrorString.
+void Win32Fatal(const char* function);
 #endif
 
 #endif  // NINJA_UTIL_H_