diff --git a/README b/README
index 5205303..ec61190 100644
--- a/README
+++ b/README
@@ -1,253 +1,151 @@
 Google C++ Testing Framework
 ============================
+
 http://code.google.com/p/googletest/
 
 Overview
 --------
-Google's framework for writing C++ tests on a variety of platforms (Linux, Mac
-OS X, Windows, Windows CE, Symbian, and etc). Based on the xUnit architecture.
-Supports automatic test discovery, a rich set of assertions, user-defined
-assertions, death tests, fatal and non-fatal failures, various options for
-running the tests, and XML test report generation.
 
-Please see the project page above for more information as well as mailing lists
-for questions, discussions, and development. There is also an IRC channel on
-OFTC (irc.oftc.net) #gtest available. Please join us!
+Google's framework for writing C++ tests on a variety of platforms
+(Linux, Mac OS X, Windows, Windows CE, Symbian, etc).  Based on the
+xUnit architecture.  Supports automatic test discovery, a rich set of
+assertions, user-defined assertions, death tests, fatal and non-fatal
+failures, various options for running the tests, and XML test report
+generation.
 
-Requirements
-------------
+Please see the project page above for more information as well as the
+mailing list for questions, discussions, and development.  There is
+also an IRC channel on OFTC (irc.oftc.net) #gtest available.  Please
+join us!
+
+Requirements for End Users
+--------------------------
+
 Google Test is designed to have fairly minimal requirements to build
-and use with your projects, but there are some. Currently, we support
-building Google Test on Linux, Windows, Mac OS X, and Cygwin.  We will
-also make our best effort to support other platforms (e.g. Solaris and
-IBM z/OS).  However, since core members of the Google Test project
-have no access to them, Google Test may have outstanding issues on
-these platforms.  If you notice any problems on your platform, please
-notify googletestframework@googlegroups.com (patches for fixing them
-are even more welcome!).
+and use with your projects, but there are some.  Currently, we support
+Linux, Windows, Mac OS X, and Cygwin.  We will also make our best
+effort to support other platforms (e.g. Solaris, AIX, and z/OS).
+However, since core members of the Google Test project have no access
+to these platforms, Google Test may have outstanding issues there.  If
+you notice any problems on your platform, please notify
+googletestframework@googlegroups.com.  Patches for fixing them are
+even more welcome!
 
 ### Linux Requirements ###
+
 These are the base requirements to build and use Google Test from a source
 package (as described below):
-  * GNU-compatible Make or "gmake"
+  * GNU-compatible Make or gmake
   * POSIX-standard shell
   * POSIX(-2) Regular Expressions (regex.h)
-  * A C++98 standards compliant compiler
-
-Furthermore, if you are building Google Test from a VCS Checkout (also
-described below), there are further requirements:
-  * Automake version 1.9 or newer
-  * Autoconf version 2.59 or newer
-  * Libtool / Libtoolize
-  * Python version 2.4 or newer
+  * A C++98-standard-compliant compiler
 
 ### Windows Requirements ###
-  * Microsoft Visual Studio 7.1 or newer
+
+  * Microsoft Visual C++ 7.1 or newer
 
 ### Cygwin Requirements ###
+
   * Cygwin 1.5.25-14 or newer
 
 ### Mac OS X Requirements ###
+
   * Mac OS X 10.4 Tiger or newer
   * Developer Tools Installed
-  * Optional: Xcode 2.5 or later for univeral-binary framework; see note below.
+
+Also, you'll need CMake 2.6.4 or higher if you want to build the
+samples using the provided CMake script, regardless of the platform.
+
+Requirements for Contributors
+-----------------------------
+
+We welcome patches.  If you plan to contribute a patch, you need to
+build Google Test and its own tests from an SVN checkout (described
+below), which has further requirements:
+
+  * Python version 2.3 or newer (for running some of the tests and
+    re-generating certain source files from templates)
+  * CMake 2.6.4 or newer
 
 Getting the Source
 ------------------
-There are two primary ways of getting Google Test's source code: you can
-download a source release in your preferred archive format, or directly check
-out the source from a Version Control System (VCS, we use Google Code's
-Subversion hosting). The VCS checkout requires a few extra steps and some extra
-software packages on your system, but lets you track development, and make
-patches to contribute much more easily, so we highly encourage it.
 
-### VCS Checkout: ###
-The first step is to select whether you want to check out the main line of
-development on Google Test, or one of the released branches. The former will be
-much more active and have the latest features, but the latter provides much
-more stability and predictability. Choose whichever fits your needs best, and
-proceed with the following Subversion commands:
+There are two primary ways of getting Google Test's source code: you
+can download a stable source release in your preferred archive format,
+or directly check out the source from our Subversion (SVN) repositary.
+The SVN checkout requires a few extra steps and some extra software
+packages on your system, but lets you track the latest development and
+make patches much more easily, so we highly encourage it.
 
-  svn checkout http://googletest.googlecode.com/svn/trunk/ gtest-svn
+### Source Package ###
 
-or for a release version X.Y.*'s branch:
+Google Test is released in versioned source packages which can be
+downloaded from the download page [1].  Several different archive
+formats are provided, but the only difference is the tools used to
+manipulate them, and the size of the resulting file.  Download
+whichever you are most comfortable with.
 
-  svn checkout http://googletest.googlecode.com/svn/branches/release-X.Y/ \
-    gtest-X.Y-svn
+  [1] http://code.google.com/p/googletest/downloads/list
 
-Next you will need to prepare the GNU Autotools build system, if you
-are using Linux, Mac OS X, or Cygwin. Enter the target directory of
-the checkout command you used ('gtest-svn' or 'gtest-X.Y-svn' above)
-and proceed with the following command:
-
-  autoreconf -fvi
-
-Once you have completed this step, you are ready to build the library. Note
-that you should only need to complete this step once. The subsequent `make'
-invocations will automatically re-generate the bits of the build system that
-need to be changed.
-
-If your system uses older versions of the autotools, the above command will
-fail. You may need to explicitly specify a version to use. For instance, if you
-have both GNU Automake 1.4 and 1.9 installed and `automake' would invoke the
-1.4, use instead:
-
-  AUTOMAKE=automake-1.9 ACLOCAL=aclocal-1.9 autoreconf -fvi
-
-Make sure you're using the same version of automake and aclocal.
-
-### Source Package: ###
-Google Test is also released in source packages which can be downloaded from
-its Google Code download page[1]. Several different archive formats are
-provided, but the only difference is the tools used to manipulate them, and the
-size of the resulting file. Download whichever you are most comfortable with.
-
-  [1] Google Test Downloads: http://code.google.com/p/googletest/downloads/list
-
-Once downloaded expand the archive using whichever tools you prefer for that
-type. This will always result in a new directory with the name "gtest-X.Y.Z"
-which contains all of the source code. Here are some examples in Linux:
+Once the package is downloaded, expand it using whichever tools you
+prefer for that type.  This will result in a new directory with the
+name "gtest-X.Y.Z" which contains all of the source code.  Here are
+some examples on Linux:
 
   tar -xvzf gtest-X.Y.Z.tar.gz
   tar -xvjf gtest-X.Y.Z.tar.bz2
   unzip gtest-X.Y.Z.zip
 
-Choosing a TR1 Tuple Library
-----------------------------
-Some Google Test features require the C++ Technical Report 1 (TR1)
-tuple library, which is not yet widely available with all compilers.
-The good news is that Google Test implements a subset of TR1 tuple
-that's enough for its own need, and will automatically use this when
-the compiler doesn't provide TR1 tuple.
+### SVN Checkout ###
 
-Usually you don't need to care about which tuple library Google Test
-uses.  However, if your project already uses TR1 tuple, you need to
-tell Google Test to use the same TR1 tuple library the rest of your
-project uses (this requirement is new in Google Test 1.4.0, so you may
-need to take care of it when upgrading from an earlier version), or
-the two tuple implementations will clash.  To do that, add
+To check out the main branch (also known as the "trunk") of Google
+Test, run the following Subversion command:
 
-  -DGTEST_USE_OWN_TR1_TUPLE=0
+  svn checkout http://googletest.googlecode.com/svn/trunk/ gtest-svn
 
-to the compiler flags while compiling Google Test and your tests.
+Setting up the Build
+--------------------
 
-If you don't want Google Test to use tuple at all, add
+To build Google Test and your tests that use it, you need to tell your
+build system where to find its headers and source files.  The exact
+way to do it depends on which build system you use, and is usually
+straightforward.
 
-  -DGTEST_HAS_TR1_TUPLE=0
+### Generic Build Instructions ###
 
-to the compiler flags.  All features using tuple will be disabled in
-this mode.
+Suppose you put Google Test in directory ${GTEST_DIR}.  To build it,
+create a library build target (or a project as called by Visual Studio
+and Xcode) to compile
 
-Building the Source
--------------------
-### Linux, Mac OS X (without Xcode), and Cygwin ###
-There are two primary options for building the source at this point: build it
-inside the source code tree, or in a separate directory. We recommend building
-in a separate directory as that tends to produce both more consistent results
-and be easier to clean up should anything go wrong, but both patterns are
-supported. The only hard restriction is that while the build directory can be
-a subdirectory of the source directory, the opposite is not possible and will
-result in errors. Once you have selected where you wish to build Google Test,
-create the directory if necessary, and enter it. The following steps apply for
-either approach by simply substituting the shell variable SRCDIR with "." for
-building inside the source directory, and the relative path to the source
-directory otherwise.
+  ${GTEST_DIR}/src/gtest-all.cc
 
-  ${SRCDIR}/configure  # Standard GNU configure script, --help for more info
-  make  # Standard makefile following GNU conventions
-  make check  # Builds and runs all tests - all should pass
+with
 
-### Windows ###
-The msvc\ folder contains two solutions with Visual C++ projects. Open the
-gtest.sln or gtest-md.sln file using Visual Studio, and you are ready to
-build Google Test the same way you build any Visual Studio project. Files
-that have names ending with -md use DLL versions of Microsoft runtime
-libraries (the /MD or the /MDd compiler option). Files without that suffix
-use static versions of the runtime libraries (the /MT or the /MTd option).
-Please note that one must use the same option to compile both gtest and his
-test code. If you use Visual Studio 2005 or above, we recommend the -md
-version as /MD is the default for new projects in these versions of Visual
-Studio.
+  ${GTEST_DIR}/include and ${GTEST_DIR}
 
-### Mac OS X (universal-binary framework) ###
-Open the gtest.xcodeproj in the xcode/ folder using Xcode. Build the "gtest"
-target. The universal binary framework will end up in your selected build
-directory (selected in the Xcode "Preferences..." -> "Building" pane and
-defaults to xcode/build). Alternatively, at the command line, enter:
+in the header search path.  Assuming a Linux-like system and gcc,
+something like the following will do:
 
-  xcodebuild
+  g++ -I${GTEST_DIR}/include -I${GTEST_DIR} -c ${GTEST_DIR}/src/gtest-all.cc
+  ar -rv libgtest.a gtest-all.o
 
-This will build the "Release" configuration of gtest.framework in your
-default build location. See the "xcodebuild" man page for more information about
-building different configurations and building in different locations.
+Next, you should compile your test source file with
+${GTEST_DIR}/include in the header search path, and link it with gtest
+and any other necessary libraries:
 
-To test the gtest.framework in Xcode, change the active target to "Check" and
-then build. This target builds all of the tests and then runs them. Don't worry
-if you see some errors. Xcode reports all test failures (even the intentional
-ones) as errors. However, you should see a "Build succeeded" message at the end
-of the build log. To run all of the tests from the command line, enter:
+  g++ -I${GTEST_DIR}/include path/to/your_test.cc libgtest.a -o your_test
 
-  xcodebuild -target Check
-
-Installation with xcodebuild requires specifying an installation desitination
-directory, known as the DSTROOT. Three items will be installed when using
-xcodebuild:
-
-  $DSTROOT/Library/Frameworks/gtest.framework
-  $DSTROOT/usr/local/lib/libgtest.a
-  $DSTROOT/usr/local/lib/libgtest_main.a
-
-You specify the installation directory on the command line with the other
-xcodebuild options. Here's how you would install in a user-visible location:
-
-  xcodebuild install DSTROOT=~
-
-To perform a system-wide inistall, escalate to an administrator and specify
-the file system root as the DSTROOT:
-
-  sudo xcodebuild install DSTROOT=/
-
-To uninstall gtest.framework via the command line, you need to delete the three
-items listed above. Remember to escalate to an administrator if deleting these
-from the system-wide location using the commands listed below:
-
-  sudo rm -r /Library/Frameworks/gtest.framework
-  sudo rm /usr/local/lib/libgtest.a
-  sudo rm /usr/local/lib/libgtest_main.a
-
-It is also possible to build and execute individual tests within Xcode. Each
-test has its own Xcode "Target" and Xcode "Executable". To build any of the
-tests, change the active target and the active executable to the test of
-interest and then build and run.
-
-Individual tests can be built from the command line using:
-
-  xcodebuild -target <test_name>
-
-These tests can be executed from the command line by moving to the build
-directory and then (in bash)
-
-  export DYLD_FRAMEWORK_PATH=`pwd`
-  ./<test_name>  # (e.g. ./gtest_unittest)
-
-To use gtest.framework for your own tests, first, install the framework using
-the steps described above. Then add it to your Xcode project by selecting
-Project->Add to Project... from the main menu. Next, add libgtest_main.a from
-gtest.framework/Resources directory using the same menu command. Finally,
-create a new executable target and add gtest.framework and libgtest_main.a to
-the "Link Binary With Libraries" build phase.
-
-### Using GNU Make ###
-The make/ directory contains a Makefile that you can use to build
-Google Test on systems where GNU make is available (e.g. Linux, Mac OS
-X, and Cygwin).  It doesn't try to build Google Test's own tests.
-Instead, it just builds the Google Test library and a sample test.
-You can use it as a starting point for your own Makefile.
+As an example, the make/ directory contains a Makefile that you can
+use to build Google Test on systems where GNU make is available
+(e.g. Linux, Mac OS X, and Cygwin).  It doesn't try to build Google
+Test's own tests.  Instead, it just builds the Google Test library and
+a sample test.  You can use it as a starting point for your own build
+script.
 
 If the default settings are correct for your environment, the
 following commands should succeed:
 
-  cd ${SRCDIR}/make
+  cd ${GTEST_DIR}/make
   make
   ./sample1_unittest
 
@@ -255,19 +153,244 @@
 them go away.  There are instructions in make/Makefile on how to do
 it.
 
-### Using Your Own Build System ###
-If none of the build solutions we provide works for you, or if you
-prefer your own build system, you just need to compile
-src/gtest-all.cc into a library and link your tests with it.  Assuming
-a Linux-like system and gcc, something like the following will do:
+### Using CMake ###
 
-  cd ${SRCDIR}
-  g++ -I. -I./include -c src/gtest-all.cc
-  ar -rv libgtest.a gtest-all.o
-  g++ -I. -I./include path/to/your_test.cc libgtest.a -o your_test
+Google Test comes with a CMake build script (CMakeLists.txt) that can
+be used on a wide range of platforms ("C" stands for cross-platofrm.).
+If you don't have CMake installed already, you can download it for
+free from http://www.cmake.org/.
 
-Regenerating Source Files
--------------------------
+CMake works by generating native makefiles or build projects that can
+be used in the compiler environment of your choice.  The typical
+workflow starts with:
+
+  mkdir mybuild       # Create a directory to hold the build output.
+  cd mybuild
+  cmake ${GTEST_DIR}  # Generate native build scripts.
+
+If you want to build Google Test's samples, you should replace the
+last command with
+
+  cmake -Dbuild_gtest_samples=ON ${GTEST_DIR}
+
+If you are on a *nix system, you should now see a Makefile in the
+current directory.  Just type 'make' to build gtest.
+
+If you use Windows and have Vistual Studio installed, a gtest.sln file
+and several .vcproj files will be created.  You can then build them
+using Visual Studio.
+
+On Mac OS X with Xcode installed, a .xcodeproj file will be generated.
+
+### Legacy Build Scripts ###
+
+Before settling on CMake, we have been providing hand-maintained build
+projects/scripts for Visual Studio, Xcode, and Autotools.  While we
+continue to provide them for convenience, they are not actively
+maintained any more.  We highly recommend that you follow the
+instructions in the previous two sections to integrate Google Test
+with your existing build system.
+
+If you still need to use the legacy build scripts, here's how:
+
+The msvc\ folder contains two solutions with Visual C++ projects.
+Open the gtest.sln or gtest-md.sln file using Visual Studio, and you
+are ready to build Google Test the same way you build any Visual
+Studio project.  Files that have names ending with -md use DLL
+versions of Microsoft runtime libraries (the /MD or the /MDd compiler
+option).  Files without that suffix use static versions of the runtime
+libraries (the /MT or the /MTd option).  Please note that one must use
+the same option to compile both gtest and the test code.  If you use
+Visual Studio 2005 or above, we recommend the -md version as /MD is
+the default for new projects in these versions of Visual Studio.
+
+On Mac OS X, open the gtest.xcodeproj in the xcode/ folder using
+Xcode.  Build the "gtest" target.  The universal binary framework will
+end up in your selected build directory (selected in the Xcode
+"Preferences..." -> "Building" pane and defaults to xcode/build).
+Alternatively, at the command line, enter:
+
+  xcodebuild
+
+This will build the "Release" configuration of gtest.framework in your
+default build location.  See the "xcodebuild" man page for more
+information about building different configurations and building in
+different locations.
+
+Tweaking Google Test
+--------------------
+
+Google Test can be used in diverse environments.  The default
+configuration may not work (or may not work well) out of the box in
+some environments.  However, you can easily tweak Google Test by
+defining control macros on the compiler command line.  Generally,
+these macros are named like GTEST_XYZ and you define them to either 1
+or 0 to enable or disable a certain feature.
+
+We list the most frequently used macros below.  For a complete list,
+see file include/gtest/internal/gtest-port.h.
+
+### Choosing a TR1 Tuple Library ###
+
+Some Google Test features require the C++ Technical Report 1 (TR1)
+tuple library, which is not yet available with all compilers.  The
+good news is that Google Test implements a subset of TR1 tuple that's
+enough for its own need, and will automatically use this when the
+compiler doesn't provide TR1 tuple.
+
+Usually you don't need to care about which tuple library Google Test
+uses.  However, if your project already uses TR1 tuple, you need to
+tell Google Test to use the same TR1 tuple library the rest of your
+project uses, or the two tuple implementations will clash.  To do
+that, add
+
+  -DGTEST_USE_OWN_TR1_TUPLE=0
+
+to the compiler flags while compiling Google Test and your tests.  If
+you want to force Google Test to use its own tuple library, just add
+
+  -DGTEST_USE_OWN_TR1_TUPLE=1
+
+to the compiler flags instead.
+
+If you don't want Google Test to use tuple at all, add
+
+  -DGTEST_HAS_TR1_TUPLE=0
+
+and all features using tuple will be disabled.
+
+### Multi-threaded Tests ###
+
+Google Test is thread-safe where the pthread library is available.
+After #include <gtest/gtest.h>, you can check the GTEST_IS_THREADSAFE
+macro to see whether this is the case (yes if the macro is #defined to
+1, no if it's undefined.).
+
+If Google Test doesn't correctly detect whether pthread is available
+in your environment, you can force it with
+
+  -DGTEST_HAS_PTHREAD=1
+
+or
+
+  -DGTEST_HAS_PTHREAD=0
+
+When Google Test uses pthread, you may need to add flags to your
+compiler and/or linker to select the pthread library, or you'll get
+link errors.  If you use the CMake script or the deprecated Autotools
+script, this is taken care of for you.  If you use your own build
+script, you'll need to read your compiler and linker's manual to
+figure out what flags to add.
+
+### As a Shared Library (DLL) ###
+
+Google Test is compact, so most users can build and link it as a
+static library for the simplicity.  You can choose to use Google Test
+as a shared library (known as a DLL on Windows) if you prefer.
+
+To compile gtest as a shared library, add
+
+  -DGTEST_CREATE_SHARED_LIBRARY=1
+
+to the compiler flags.  You'll also need to tell the linker to produce
+a shared library instead - consult your linker's manual for how to do
+it.
+
+To compile your tests that use the gtest shared library, add
+
+  -DGTEST_LINKED_AS_SHARED_LIBRARY=1
+
+to the compiler flags.
+
+### Avoiding Macro Name Clashes ###
+
+In C++, macros don't obey namespaces.  Therefore two libraries that
+both define a macro of the same name will clash if you #include both
+definitions.  In case a Google Test macro clashes with another
+library, you can force Google Test to rename its macro to avoid the
+conflict.
+
+Specifically, if both Google Test and some other code define macro
+FOO, you can add
+
+  -DGTEST_DONT_DEFINE_FOO=1
+
+to the compiler flags to tell Google Test to change the macro's name
+from FOO to GTEST_FOO.  Currently FOO can be FAIL, SUCCEED, or TEST.
+For example, with -DGTEST_DONT_DEFINE_TEST=1, you'll need to write
+
+  GTEST_TEST(SomeTest, DoesThis) { ... }
+
+instead of
+
+  TEST(SomeTest, DoesThis) { ... }
+
+in order to define a test.
+
+Upgrating from an Earlier Version
+---------------------------------
+
+We strive to keep Google Test releases backward compatible.
+Sometimes, though, we have to make some breaking changes for the
+users' long-term benefits.  This section describes what you'll need to
+do if you are upgrading from an earlier version of Google Test.
+
+### Upgrading from 1.3.0 or Earlier ###
+
+You may need to explicitly enable or disable Google Test's own TR1
+tuple library.  See the instructions in section "Choosing a TR1 Tuple
+Library".
+
+### Upgrading from 1.4.0 or Earlier ###
+
+The Autotools build script (configure + make) is no longer officially
+supportted.  You are encouraged to migrate to your own build system or
+use CMake.  If you still need to use Autotools, you can find
+instructions in the README file from Google Test 1.4.0.
+
+On platforms where the pthread library is available, Google Test uses
+it in order to be thread-safe.  See the "Multi-threaded Tests" section
+for what this means to your build script.
+
+If you use Microsoft Visual C++ 7.1 with exceptions disabled, Google
+Test will no longer compile.  This should affect very few people, as a
+large portion of STL (including <string>) doesn't compile in this mode
+anyway.  We decided to stop supporting it in order to greatly simplify
+Google Test's implementation.
+
+Developing Google Test
+----------------------
+
+This section discusses how to make your own changes to Google Test.
+
+### Testing Google Test Itself ###
+
+To make sure your changes work as intended and don't break existing
+functionality, you'll want to compile and run Google Test's own tests.
+For that you can use CMake:
+
+  mkdir mybuild
+  cd mybuild
+  cmake -Dbuild_all_gtest_tests=ON ${GTEST_DIR}
+
+Make sure you have Python installed, as some of Google Test's tests
+are written in Python.  If the cmake command complains about not being
+able to find Python ("Could NOT find PythonInterp (missing:
+PYTHON_EXECUTABLE)"), try telling it explicitly where your Python
+executable can be found:
+
+  cmake -DPYTHON_EXECUTABLE=path/to/python -Dbuild_all_gtest_tests=ON \
+      ${GTEST_DIR}
+
+Next, you can build Google Test and all of its own tests.  On *nix,
+this is usually done by 'make'.  To run the tests, do
+
+  make test
+
+All tests should pass.
+
+### Regenerating Source Files ###
+
 Some of Google Test's source files are generated from templates (not
 in the C++ sense) using a script.  A template file is named FOO.pump,
 where FOO is the name of the file it will generate.  For example, the
@@ -275,12 +398,20 @@
 gtest-type-util.h in the same directory.
 
 Normally you don't need to worry about regenerating the source files,
-unless you need to modify them (e.g. if you are working on a patch for
-Google Test).  In that case, you should modify the corresponding .pump
-files instead and run the 'pump' script (for Pump is Useful for Meta
-Programming) to regenerate them.  We are still working on releasing
-the script and its documentation.  If you need it now, please email
-googletestframework@googlegroups.com such that we know to make it
-happen sooner.
+unless you need to modify them.  In that case, you should modify the
+corresponding .pump files instead and run the pump.py Python script to
+regenerate them.  You can find pump.py in the scripts/ directory.
+Read the Pump manual [2] for how to use it.
+
+  [2] http://code.google.com/p/googletest/wiki/PumpManual
+
+### Contributing a Patch ###
+
+We welcome patches.  Please read the Google Test developer's guide [3]
+for how you can contribute.  In particular, make sure you have signed
+the Contributor License Agreement, or we won't be able to accept the
+patch.
+
+  [3] http://code.google.com/p/googletest/wiki/GoogleTestDevGuide
 
 Happy testing!
diff --git a/make/Makefile b/make/Makefile
index 2d8806e..5b27b6a 100644
--- a/make/Makefile
+++ b/make/Makefile
@@ -20,7 +20,7 @@
 USER_DIR = ../samples
 
 # Flags passed to the preprocessor.
-CPPFLAGS += -I$(GTEST_DIR) -I$(GTEST_DIR)/include
+CPPFLAGS += -I$(GTEST_DIR)/include
 
 # Flags passed to the C++ compiler.
 CXXFLAGS += -g -Wall -Wextra
@@ -52,10 +52,12 @@
 # conservative and not optimized.  This is fine as Google Test
 # compiles fast and for ordinary users its source rarely changes.
 gtest-all.o : $(GTEST_SRCS_)
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(GTEST_DIR)/src/gtest-all.cc
+	$(CXX) $(CPPFLAGS) -I$(GTEST_DIR) $(CXXFLAGS) -c \
+            $(GTEST_DIR)/src/gtest-all.cc
 
 gtest_main.o : $(GTEST_SRCS_)
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(GTEST_DIR)/src/gtest_main.cc
+	$(CXX) $(CPPFLAGS) -I$(GTEST_DIR) $(CXXFLAGS) -c \
+            $(GTEST_DIR)/src/gtest_main.cc
 
 gtest.a : gtest-all.o
 	$(AR) $(ARFLAGS) $@ $^
@@ -75,4 +77,4 @@
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(USER_DIR)/sample1_unittest.cc
 
 sample1_unittest : sample1.o sample1_unittest.o gtest_main.a
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $^ -o $@
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -lpthread $^ -o $@