diff -r 699670303a43 PCbuild/build.bat
--- a/PCbuild/build.bat	Wed Sep 02 13:21:19 2015 -0500
+++ b/PCbuild/build.bat	Wed Sep 02 15:06:47 2015 -0500
@@ -17,12 +17,20 @@
 echo.  -r  Target Rebuild instead of Build
 echo.  -d  Set the configuration to Debug
 echo.  -e  Build external libraries fetched by get_externals.bat
+echo.      Extension modules that depend on external libraries will not attempt
+echo.      to build if this flag is not present
 echo.  -m  Enable parallel build
 echo.  -M  Disable parallel build (disabled by default)
 echo.  -v  Increased output messages
 echo.  -k  Attempt to kill any running Pythons before building (usually done
 echo.      automatically by the pythoncore project)
 echo.
+echo.Available flags to avoid building certain modules.
+echo.These flags have no effect if '-e' is not given:
+echo.  --no-ssl      Do not attempt to build _ssl
+echo.  --no-tkinter  Do not attempt to build Tkinter
+echo.  --no-bsddb    Do not attempt to build _bsddb
+echo.
 echo.Available arguments:
 echo.  -c Release ^| Debug ^| PGInstrument ^| PGUpdate
 echo.     Set the configuration (default: Release)
@@ -42,6 +50,10 @@
 set parallel=
 set verbose=/nologo /v:m
 set kill=
+set externals=false
+set ssl=true
+set tkinter=true
+set bsddb=true
 
 :CheckOpts
 if "%~1"=="-h" goto Usage
@@ -50,11 +62,14 @@
 if "%~1"=="-r" (set target=Rebuild) & shift & goto CheckOpts
 if "%~1"=="-t" (set target=%2) & shift & shift & goto CheckOpts
 if "%~1"=="-d" (set conf=Debug) & shift & goto CheckOpts
-if "%~1"=="-e" call "%dir%get_externals.bat" & shift & goto CheckOpts
+if "%~1"=="-e" (set externals=true) & call "%dir%get_externals.bat" & shift & goto CheckOpts
 if "%~1"=="-m" (set parallel=/m) & shift & goto CheckOpts
 if "%~1"=="-M" (set parallel=) & shift & goto CheckOpts
 if "%~1"=="-v" (set verbose=/v:n) & shift & goto CheckOpts
 if "%~1"=="-k" (set kill=true) & shift & goto CheckOpts
+if "%~1"=="--no-ssl" (set ssl=false) & shift & goto CheckOpts
+if "%~1"=="--no-tkinter" (set tkinter=false) & shift & goto CheckOpts
+if "%~1"=="--no-bsddb" (set bsddb=false) & shift & goto CheckOpts
 
 if "%platf%"=="x64" (set vs_platf=x86_amd64)
 
@@ -69,4 +84,9 @@
 rem Passing %1-9 is not the preferred option, but argument parsing in
 rem batch is, shall we say, "lackluster"
 echo on
-msbuild "%dir%pcbuild.proj" /t:%target% %parallel% %verbose% /p:Configuration=%conf% /p:Platform=%platf% %1 %2 %3 %4 %5 %6 %7 %8 %9
+msbuild "%dir%pcbuild.proj" /t:%target% %parallel% %verbose%^
+ /p:Configuration=%conf% /p:Platform=%platf%^
+ /p:IncludeExternals=%externals%^
+ /p:IncludeSSL=%ssl% /p:IncludeTkinter=%tkinter%^
+ /p:IncludeBsddb=%bsddb%^
+ %1 %2 %3 %4 %5 %6 %7 %8 %9
diff -r 699670303a43 PCbuild/pcbuild.proj
--- a/PCbuild/pcbuild.proj	Wed Sep 02 13:21:19 2015 -0500
+++ b/PCbuild/pcbuild.proj	Wed Sep 02 15:06:47 2015 -0500
@@ -5,8 +5,11 @@
     <Platform Condition="'$(Platform)' == ''">Win32</Platform>
     <Configuration Condition="'$(Configuration)' == ''">Release</Configuration>
     <IncludeExtensions Condition="'$(IncludeExtensions)' == ''">true</IncludeExtensions>
+    <IncludeExternals Condition="'$(IncludeExternals)' == ''">true</IncludeExternals>
     <IncludeTests Condition="'$(IncludeTest)' == ''">true</IncludeTests>
     <IncludeSSL Condition="'$(IncludeSSL)' == ''">true</IncludeSSL>
+    <IncludeTkinter Condition="'$(IncludeTkinter)' == ''">true</IncludeTkinter>
+    <IncludeBsddb Condition="'$(IncludeBsddb)' == ''">true</IncludeBsddb>
   </PropertyGroup>
 
   <ItemDefinitionGroup>
@@ -34,10 +37,15 @@
     <!-- python[w].exe -->
     <Projects Include="python.vcxproj;pythonw.vcxproj" />
     <!-- Extension modules -->
-    <ExtensionModules Include="_bsddb;bz2;_ctypes;_elementtree;_msi;_multiprocessing;_sqlite3;_tkinter;tix;pyexpat;select;unicodedata;winsound" />
+    <ExtensionModules Include="_ctypes;_elementtree;_msi;_multiprocessing;pyexpat;select;unicodedata;winsound" />
+    <!-- Extension modules that require external sources -->
+    <ExternalModules Include="bz2;_sqlite3" />
     <!-- _ssl will build _socket as well, which may cause conflicts in parallel builds -->
     <ExtensionModules Include="_socket" Condition="!$(IncludeSSL)" />
-    <ExtensionModules Include="_ssl;_hashlib" Condition="$(IncludeSSL)" />
+    <ExternalModules Include="_ssl;_hashlib" Condition="$(IncludeSSL)" />
+    <ExternalModules Include="_tkinter;tix" Condition="$(IncludeTkinter)" />
+    <ExternalModules Include="_bsddb" Condition="$(IncludeBsddb)" />
+    <ExtensionModules Include="@(ExternalModules->'%(Identity)')" Condition="$(IncludeExternals)" />
     <Projects Include="@(ExtensionModules->'%(Identity).vcxproj')" Condition="$(IncludeExtensions)" />
     <!-- Test modules -->
     <TestModules Include="_ctypes_test;_testcapi" />