Update PCbuild/readme.txt (merge from 3.5)
diff --git a/PCbuild/readme.txt b/PCbuild/readme.txt
index 51164e2..eec7ace 100644
--- a/PCbuild/readme.txt
+++ b/PCbuild/readme.txt
@@ -41,15 +41,14 @@
 used to build standard x86-compatible 32-bit binaries, output into the

 win32 sub-directory.  The x64 platform is used for building 64-bit AMD64

 (aka x86_64 or EM64T) binaries, output into the amd64 sub-directory.

-The Itanium (IA-64) platform is no longer supported.  See the "Building

-for AMD64" section below for more information about 64-bit builds.

+The Itanium (IA-64) platform is no longer supported.

 

 Four configuration options are supported by the solution:

 Debug

     Used to build Python with extra debugging capabilities, equivalent

     to using ./configure --with-pydebug on UNIX.  All binaries built

     using this configuration have "_d" added to their name:

-    python35_d.dll, python_d.exe, parser_d.pyd, and so on.  Both the

+    python36_d.dll, python_d.exe, parser_d.pyd, and so on.  Both the

     build and rt (run test) batch files in this directory accept a -d

     option for debug builds.  If you are building Python to help with

     development of CPython, you will most likely use this configuration.

@@ -76,29 +75,7 @@
 

 By default, build.bat will build Python in Release configuration for

 the 32-bit Win32 platform.  It accepts several arguments to change

-this behavior:

-

-   -c <configuration>  Set the configuration (see above)

-   -d                  Shortcut for "-c Debug"

-   -p <platform>       Set the platform to build for ("Win32" or "x64")

-   -r                  Rebuild instead of just building

-   -t <target>         Set the target (Build, Rebuild, Clean or CleanAll)

-   -e                  Use get_externals.bat to fetch external sources

-   -M                  Don't build in parallel

-   -v                  Increased output messages

-

-Up to 9 MSBuild switches can also be passed, though they must be passed

-after specifying any of the above switches.  For example, use:

-

-   build.bat -e -d /fl

-

-to do a debug build with externals fetched as needed and write detailed

-build logs to a file.  If the MSBuild switch requires an equal sign

-("="), the entire switch must be quoted:

-

-   build.bat -e -d "/p:ExternalsDir=P:\cpython-externals"

-

-There may also be other situations where quotes are necessary.

+this behavior, try `build.bat -h` to learn more.

 

 

 C Runtime

@@ -129,8 +106,6 @@
     .dll and .lib

 python

     .exe

-make_buildinfo, make_versioninfo

-    helpers to provide necessary information to the build process

 

 These sub-projects provide extra executables that are useful for running

 CPython in different ways:

@@ -152,9 +127,6 @@
 _freeze_importlib

     _freeze_importlib.exe, used to regenerate Python\importlib.h after

     changes have been made to Lib\importlib\_bootstrap.py

-bdist_wininst

-    ..\Lib\distutils\command\wininst-14.0[-amd64].exe, the base

-    executable used by the distutils bdist_wininst command

 python3dll

     python3.dll, the PEP 384 Stable ABI dll

 xxlimited

@@ -274,14 +246,8 @@
 find them.  This is an advanced topic and not necessarily fully

 supported.

 

-

-Building for AMD64

-------------------

-

-The build process for AMD64 / x64 is very similar to standard builds,

-you just have to set x64 as platform. In addition, the HOST_PYTHON

-environment variable must point to a Python interpreter (at least 2.4),

-to support cross-compilation from Win32.

+The get_externals.bat script is called automatically by build.bat when

+you pass the '-e' option to it.

 

 

 Profile Guided Optimization

@@ -298,7 +264,7 @@
 PGI python, and finally creates the optimized files.

 

 See

-    http://msdn.microsoft.com/en-us/library/e7k32f4k(VS.100).aspx

+    http://msdn.microsoft.com/en-us/library/e7k32f4k(VS.140).aspx

 for more on this topic.